ADCMT 7351A Operation Manual
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ADCMT 7351A Operation Manual

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Cover
7351A/E
Digital Multimeter
Operation Manual
FOE-8440238F00
MANUAL NUMBER
Applicable Models
7351A
7351E
First printing March 30, 2007
C
2007
ADC CORPORATION
All rights reserved.
Printed in Japan

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Summary of Contents for ADCMT 7351A

  • Page 1 Cover 7351A/E Digital Multimeter Operation Manual FOE-8440238F00 MANUAL NUMBER Applicable Models 7351A 7351E First printing March 30, 2007 2007 ADC CORPORATION All rights reserved. Printed in Japan...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 7351 Series Digital Multimeter Operation Manual TABLE OF CONTENTS INTRODUCTION ..................Contents of this Manual ..................Product Overview ....................PRECAUTIONS ..................If a Fault Occurs ....................Removing the Case ................... Power Fuse ......................Electromagnetic Interference ................Note When Turning on the Power ..............SETUP ......................
  • Page 4 7351 Series Digital Multimeter Operation Manual Table of Contents 4.2.1.4 DC Current Measurement (DCI) ..............4-10 4.2.1.5 AC Current Measurement (ACI and ACI (AC+DC)) ........ 4-12 4.2.1.6 Continuity Measurement ................4-13 4.2.1.7 Diode Measurement ..................4-14 4.2.1.8 Frequency Measurement (FREQ) ............... 4-15 4.2.2 Setting the Measurement Range ..............
  • Page 5 6-11 6.4.3.1 Connecting to a Personal Computer ............6-11 6.4.3.2 USBid Setting ..................... 6-11 Control Signal (7351A, 7351E + Option 03) ............ 6-12 6.5.1 External Trigger Terminal (TRIGGER IN) ..........6-12 6.5.2 Measurement Complete Signal Terminal (COMPLETE OUT) ....6-13 Comparator Output (7351E + Option 03) ............
  • Page 6 7351 Series Digital Multimeter Operation Manual Table of Contents MAINTENANCE ..................Replacing Fuses ....................8.1.1 Replacing a Power Fuse ................8.1.2 Replacing a Protection Fuse ............... 8.1.2.1 How to Check Protection Fuses ..............8.1.2.2 How to Replace Protection Fuses ............... Cleaning ......................
  • Page 7 Connecting the Power Cable ..................... 3-11 Front Panel Description ....................Display Section Description ..................... Rear Panel Description (7351A) ..................Rear Panel Description (7351E + Option 03) ..............DC Voltage Measurement (DCV) ..................AC Voltage Measurement (ACV and ACV (AC+DC)) ...........
  • Page 9 7351 Series Digital Multimeter Operation Manual LIST OF TABLES Title Page Standard Accessories ......................ESD Countermeasures ...................... Accessories ........................Relation Table between AC Power Supply Voltage and Indication of Set Power Supply Voltage 3-8 Maximum Allowable Applied Voltage (DCV) ..............Measurement range and Input impedance (DCV) ............

  • Page 11: Introduction

    7351 Series Digital Multimeter Operation Manual 1. INTRODUCTION INTRODUCTION This chapter describes the contents of this manual and the product overview of the 7351 Series Digital Mul- timeter. Contents of this Manual This manual can be used by novices or experienced users of this instrument. This manual can be read from Chapter 1 to learn more about this instrument or it can be used as a reference.

  • Page 12: Product Overview

    7351 Series Digital Multimeter Operation Manual 1.2 Product Overview Product Overview This digital multimeter includes the AD converter of the integration type. This multimeter is ideal for use as a stand-alone product or in a system. The main features of this instrument are as follows: •...

  • Page 13: Precautions

    7351 Series Digital Multimeter Operation Manual 2. PRECAUTIONS PRECAUTIONS This chapter describes precautions when using this instrument. Read this chapter before using this instru- ment. CAUTION: Using this instrument while it is stood on end or stacked with other products is unstable and danger- ous.

  • Page 14: Electromagnetic Interference

    7351 Series Digital Multimeter Operation Manual 2.4 Electromagnetic Interference Electromagnetic Interference This instrument may cause electromagnetic interference and affect television and radio. If this instrument’s power is turned off and any electromagnetic interference that may be present is reduced, then this instrument has caused the interference.

  • Page 15: Setup

    7351 Series Digital Multimeter Operation Manual 3. SETUP SETUP This chapter describes how to set up this instrument on delivery. The following topics are covered in this chapter. 3.1 Inspection on Delivery 3.2 Installation Environment 3.3 Accessories 3.4 Power Requirements Inspection on Delivery After receiving the product, inspect the outside and the accessories according to the following procedure.

  • Page 16: Standard Accessories

    7351 Series Digital Multimeter Operation Manual 3.1 Inspection on Delivery Table 3-1 Standard Accessories Name Model Quantity Remarks Power cable A01402 Input cable (Red, Black) CC010001 Each 1 Power Fuse (For 100V/120V) DFT-AAR25A-1 Power Fuse (For 220V/240V) DFT-AAR16A-1 Overcurrent protection fuse DFS-AN2A-1 Operation manual E7351A/E...

  • Page 17: Installation Environment

    7351 Series Digital Multimeter Operation Manual 3.2 Installation Environment Installation Environment This section describes the environment into which this instrument should be installed. 3.2.1 Operating Environment Install this instrument in an environment in which the following conditions are satisfied. Ambient temperature: 0 C to +50 C (operating temperature) •...

  • Page 18: Protecting Against Electrostatic Discharge

    7351 Series Digital Multimeter Operation Manual 3.2.2 Protecting Against Electrostatic Discharge 3.2.2 Protecting Against Electrostatic Discharge To prevent semiconductors from being damaged by electrostatic discharge (ESD), the precautions shown below should be taken. We recommend combining two or more countermeasures to prevent damage from ESD.

  • Page 19: Accessories

    7351 Series Digital Multimeter Operation Manual 3.3 Accessories Accessories The accessories of this instrument are shown in Table 3-3. This section describes the accessories necessary to use this instrument. Table 3-3 Accessories Name Model Remarks Input cable CC010001 Standard Accessory A01001 Shielded cable 33 VAC and 70 VDC or less...
  • Page 20 7351 Series Digital Multimeter Operation Manual 3.3.1 Input Cable Barrier Probe Protect tip Alligator clip adapter To reduce the effects of short-term stability in high resistance (in the order of M) or high sensitivity (in the order of V) measurements, use the optional input cable A01001 in which the HI side is shielded.

  • Page 21: Caution When Connecting Peripherals

    The USB driver of the ADC instrument can be downloaded from the following our home page. URL http://www.adcmt.com For more information on how to install the driver, refer to the operation manual that is included in the driver file.

  • Page 22: Power Requirements

    7351 Series Digital Multimeter Operation Manual 3.4 Power Requirements Power Requirements This section describes power requirements and how to connect the power cable. 3.4.1 Checking the Power Supply Voltage Check that the power supply voltage setting on the rear panel of this instrument accords with the AC power supply voltage to be used.

  • Page 23: Changing The Power Supply Voltage

    7351 Series Digital Multimeter Operation Manual 3.4.2 Changing the Power Supply Voltage 3.4.2 Changing the Power Supply Voltage Remove the fuse holder assembly from the rear panel. Push both side of the fuse holder assembly by using flathead screwdrivers ( and then pull it out ( Remove the power supply voltage selector from the fuse holder assembly.
  • Page 24 7351 Series Digital Multimeter Operation Manual 3.4.2 Changing the Power Supply Voltage Replace the fuse holder assembly into the rear panel. Check that the correct power supply voltage is indicated in the window. 3-10...

  • Page 25: Connecting The Power Cable

    7351 Series Digital Multimeter Operation Manual 3.4.3 Connecting the Power Cable 3.4.3 Connecting the Power Cable This instrument includes a three-core power cable with a grounding conductor. To prevent accidents caused by electric shocks, only use the included power cable and securely connect to the ground through a three-pin power outlet.

  • Page 27: Quick Start

    7351 Series Digital Multimeter Operation Manual 4. QUICK START QUICK START The high speed measurement and high accuracy measurement can be performed in this digital multimeter. To make the performing operations easier, this instrument includes the following functions on the front panel. Setting the measurement function Setting the measurement range Sampling conditions...

  • Page 28: Display Section

    7351 Series Digital Multimeter Operation Manual 4.1.1 Front Panel Description 4.1.1.1 Display Section GPIB address (My Address) Remote control Sampling indicator Calibration Sampling hold Numerical value display section Unit display section mode Sampling rate setting Fast M: Medium Slow RCL:Recall setting from internal memory ST: Store setting into Auto-range...

  • Page 29: Measurement Range Selection Keys

    7351 Series Digital Multimeter Operation Manual 4.1.1 Front Panel Description 10. AC + DC (SHIFT + ACI) Selects the AC+DC coupling or AC coupling in the AC current measurement. (SHIFT+FREQ) Selects the continuity measurement ( 4.1.1.4 Measurement Range Selection Keys AUTO Switches the measurement range between auto-range and fixed range.

  • Page 30: Shift/Exit/Local Key

    7351 Series Digital Multimeter Operation Manual 4.1.1 Front Panel Description 4.1.1.8 SHIFT/EXIT/LOCAL Key SHIFT Sets or cancels the SHIFT mode. • In the setting mode EXIT Exits from MENU and returns to the measurement state display. (The data in process of changing the setting is not saved.) •...

  • Page 31: Rear Panel Description

    7351 Series Digital Multimeter Operation Manual 4.1.2 Rear Panel Description 4.1.2 Rear Panel Description Figure 4-3 Rear Panel Description (7351A) Power connector Used to supply the AC power by connecting the included power cable (A01402). Fuse holder assembly The power supply voltage can be selected from 100 V, 120 V, 220 V, and 240 V.

  • Page 32: Rear Panel Description (7351E + Option 03)

    7351 Series Digital Multimeter Operation Manual 4.1.2 Rear Panel Description Figure 4-4 Rear Panel Description (7351E + Option 03) RS-232 connector Connector for RS-232 (7351E + Option 03) This connector is used to output data and for remote control. COMPARATOR Outputs the comparator calculation signal.

  • Page 33: Basic Operation

    7351 Series Digital Multimeter Operation Manual 4.2 Basic Operation Basic Operation When the power is turned on, this instrument automatically performs the self-test and then proceeds to the measurement sequence. For more information on the detail of the self-test, refer to Chapter 8, “MAINTENANCE.” When the self-test is complete correctly, this instrument enters into the measurement state.

  • Page 34: Ac Voltage Measurement (Acv And Acv(Ac+Dc))

    7351 Series Digital Multimeter Operation Manual 4.2.1 Measurement Functions Table 4-2 Measurement range and Input impedance (DCV) Measurement range Input impedance 200 mV, 2000 mV 1 G or more 10 M 1% 20 V, 200 V, 1000 V 4.2.1.2 AC Voltage Measurement (ACV and ACV(AC+DC)) For an AC voltage superimposed on a DC voltage, select the ACV function that measures an effective value of the AC voltage only, or the ACV (AC+DC) function that measures a root-mean-square value of the AC and DC voltages.

  • Page 35: Resistance Measurement (2W And Lp-2W)

    7351 Series Digital Multimeter Operation Manual 4.2.1 Measurement Functions Figure 4-6 AC Voltage Measurement (ACV and ACV (AC+DC)) Measurement method TrueRMS Input range 5% or more of a full scale Crest factor 3 (This is restricted to the maximum allowable applied voltage.) Filter response time Approx.

  • Page 36: Dc Current Measurement (Dci)

    7351 Series Digital Multimeter Operation Manual 4.2.1 Measurement Functions Current Figure 4-7 Resistance Measurement (2W and LP-2W) The measurement result includes the input cable resistance and contact resistance. To reject these re- sistance effects, short the tip of the input cable and set the NULL calculation to ON before the mea- surement.
  • Page 37 7351 Series Digital Multimeter Operation Manual 4.2.1 Measurement Functions WARNING: Must not measure the current source whose potential is more than 250 V. This instrument may be damaged and injury accidents may be caused. The mA and 10 A terminals are protected from any applied over-current by a fast-blow fuse. For more information on how to replace the over-current protection fuse, refer to Chapter 8, “MAIN- TENANCE”.

  • Page 38: Ac Current Measurement (Aci And Aci (Ac+Dc))

    7351 Series Digital Multimeter Operation Manual 4.2.1 Measurement Functions 4.2.1.5 AC Current Measurement (ACI and ACI (AC+DC)) For an AC current superimposed on a DC current, select the ACI function that measures an effective value of the AC current only, or the ACI (AC+DC) function that measures a root-mean-square value of the AC and DC currents.

  • Page 39: Continuity Measurement

    7351 Series Digital Multimeter Operation Manual 4.2.1 Measurement Functions 2 A or less 10 A or less 2 Arms or less 10 Arms or less 250 V or less Figure 4-9 AC Current Measurement (ACI and ACI (AC+DC)) Measurement method TrueRMS Input range 5% or more of a full scale...

  • Page 40: Diode Measurement

    7351 Series Digital Multimeter Operation Manual 4.2.1 Measurement Functions Table 4-7 Maximum Allowable Applied Voltage (Continuity) Between  and COM terminals 1000 Vpeak Between COM terminal and chassis (grounding) 500 V Current Figure 4-10 Continuity Measurement 4.2.1.7 Diode Measurement Connect a DUT to the V and COM terminals on the front panel. The diode indicator ( ) is activated.

  • Page 41: Frequency Measurement (Freq)

    7351 Series Digital Multimeter Operation Manual 4.2.1 Measurement Functions Current Figure 4-11 Diode Measurement 4.2.1.8 Frequency Measurement (FREQ) Connect a DUT to the V and COM terminals on the front panel. FREQ Press The frequency in the ACV measurement function is displayed. The DC component of the input signal is cut by using the AC coupling and the frequency is measured at the zero-cross point.

  • Page 42: Maximum Allowable Applied Voltage (Freq)

    7351 Series Digital Multimeter Operation Manual 4.2.1 Measurement Functions NOTE: When the sampling rate is set to SLOW, the sampling rate indicator alternates between the dark “S” and bright “S”. WARNING: Do not apply voltage that exceeds the maximum allowable applied voltage. Fire or electric shocks due to the failure of this instrument may occur.

  • Page 43: Setting The Measurement Range

    7351 Series Digital Multimeter Operation Manual 4.2.2 Setting the Measurement Range 4.2.2 Setting the Measurement Range Increases the measurement range by one level and fixes the range. DOWN Decreases the measurement range by one level and fixes the range. AUTO Switches the measurement range between auto-range and fixed range.

  • Page 44: Measurement Speed (B) When In The Hold On (Trigger Source: Ext)

    7351 Series Digital Multimeter Operation Manual 4.2.3 Changing the Measurement Speed and Display Digit Table 4-11 Measurement Speed (b) when in the HOLD ON (Trigger source: EXT) Measurement speed (Measurement time) Integration Sampling rate ACV(AC+DC) time 2W Continuity ACI(AC+DC) LP-2W Diode FAST 80 times/s (12.5 ms)

  • Page 45: Measurement Speed (B) When In The Hold On (Trigger Source: Bus

    7351 Series Digital Multimeter Operation Manual 4.2.3 Changing the Measurement Speed and Display Digit Table 4-13 Measurement Speed (b) when in the HOLD ON (Trigger source: BUS) RS-232 Measurement speed (Measurement time) Sampling rate Integration time ACV(AC+DC) 2W Continuity ACI(AC+DC) LP-2W...

  • Page 47: Menu Operation And Function Description

    7351 Series Digital Multimeter Operation Manual 5. MENU OPERATION AND FUNCTION DESCRIPTION MENU OPERATION AND FUNCTION DESCRIPTION Menu The functions and conditions in this instrument are set by using layered menus. 5.1.1 How to Navigate the Menus Menus have a three-layer structure. (Some menus have a four-layer structure.) First layer Category layer Selects the menu category.
  • Page 48 7351 Series Digital Multimeter Operation Manual 5.1.1 How to Navigate the Menus Press MENU The Category layer in which be selected is displayed. 1 MEAS 9 SYS Select the category by using Press The Selection layer is displayed. Select the parameters by using Press The Entry/Execution layer is displayed.

  • Page 49: Menu Operation Key And Function

    7351 Series Digital Multimeter Operation Manual 5.1.1 How to Navigate the Menus Table 5-1 Menu Operation Key and Function Entry/Execution layer Numerical value parameter Category layer Selection layer Selectable parameter/ Parameter: Dark display, Target items: Numerical execution item No blinking value/decimal point/unit Moves to the Category Moves to the Selection...

  • Page 50: Menu List

    7351 Series Digital Multimeter Operation Manual 5.1.2 Menu List 5.1.2 Menu List Category layer Selection layer Entry/Execution layer MENU 1 MEAS A.ZERO Auto-zero OFF/ON/ONCE M.DISP Display mode OFF/ON DIGIT Number of display digits. 5 1/2 to 3 1/2 .BEEP The threshold in the continuity measurement function 1 ...
  • Page 51 7351 Series Digital Multimeter Operation Manual 5.1.2 Menu List Category layer Selection layer Entry/Execution layer HIGH HIGH constant 4 CONST -999.999E+9 to 999.999E+9 LOW constant -999.999E+9 to 999.999E+9  NULL constant (For only NULL ON) NULL -999.999E+9 to 999.999E+9 Val_A Constant A (SCL) -999.999E+9 to 999.999E+9 Val_B...
  • Page 52 7351 Series Digital Multimeter Operation Manual 5.1.2 Menu List Category layer Selection layer Entry/Execution layer Interface selection (This selection differs depending on the model or option.) 8 I/F GPIB/RS-232/USB *1 GP.Adr GPIB address (Only when GPIB is selected for the interface) 0 to 30 USBid USB ID (Only when USB is selected for the interface)
  • Page 53 7351 Series Digital Multimeter Operation Manual 5.1.2 Menu List Category layer Selection layer Entry/Execution layer BEEP Buzzer setting 9 SYS OFF/ON TEST Self-Test P/KEY Display and key tests F.Inhi Disable function Each function can be set to ENA (Enabling) or DIS (Disabling). P.Lock Panel lock OFF/ON...

  • Page 54: Measurement Functions

    7351 Series Digital Multimeter Operation Manual 5.2 Measurement Functions Measurement Functions For more information on the measurement function description, refer to Chapter 4. This chapter describes the parameters set in MENU that is used in the measurement function. 5.2.1 Continuity Measurement Setting the continuity threshold constant The continuity threshold constant can be selected in the range between 1 ...

  • Page 55: Auto-Range

    7351 Series Digital Multimeter Operation Manual 5.3.2 Auto-range 5.3.2 Auto-range When Auto-range is set to ON, the measurement range of this instrument is automatically set to the opti- mum range depending on the input voltage. The judgment value used when the range is changed Range DOWN When the displayed value is less than 10% of the displayed range (less than 200 V if the DCV 1000 V range and 700 V range are both selected)

  • Page 56: Auto-Zero Operation

    7351 Series Digital Multimeter Operation Manual 5.4 Auto-Zero Operation Auto-Zero Operation Auto-zero function eliminates the offset error in the measurement system of this instrument. If Auto-zero is set to ON, the internal offset is measured and the offset error is eliminated because the offset is subtracted from the input measurement value.

  • Page 57: Display Mode Setting

    7351 Series Digital Multimeter Operation Manual 5.5 Display Mode Setting Display Mode Setting Setting the display mode Select either ON or OFF in ‘M.DISP’ in 1 MEAS MENU Press to apply the setting. ENTER A time of approximately 1 ms is required for the output to be displayed. (The time may vary depending on conditions.) Select OFF if sampling at high speed.

  • Page 58: Measurement Sequence

    7351 Series Digital Multimeter Operation Manual 5.7 Sampling Operation Sampling Operation Figure 5-2 shows the measurement sequence of this instrument. Measurements are performed when the trigger event is received. When each measurement is complete, the COMPLETE signal is output and the data output starts. The measurement data is output to the display or interface.

  • Page 59: Trigger Function

    7351 Series Digital Multimeter Operation Manual 5.8 Trigger Function Trigger Function The trigger system of this instrument allows trigger detection and the sampling start to be delayed. Figure 5-3 shows the trigger model. In this figure, the external trigger signal and complete signal output are described for illustrative purposes of the trigger model.

  • Page 60: Trigger System Operation

    7351 Series Digital Multimeter Operation Manual 5.8.1 Trigger System Operation 5.8.1 Trigger System Operation IDLE state The trigger system is in the IDLE state before the trigger sequence starts, after the trigger sequence is terminated, and while the processes of this system are not performed such as a reset state. INITiate state The INITiate state means that the trigger system operation starts.

  • Page 61: Trigger Source Selection

    Detects an event when the trigger signal is input from the external trigger con- nector (7351A, 7351E + Option 03). Detects an event when the *TRG command or GET command is received from the enabled USB or GPIB bus.
  • Page 62 7351 Series Digital Multimeter Operation Manual 5.8.3 Trigger Delay (Td) Table 5-3 Trigger Delay Time, Setting Resolution, and Accuracy Delay time accuracy Trigger delay Resolution *1 setting Ext trigger Bus trigger 6001 m to 60 s 1 ms 0.8 ms or less + resolution 3.2 ms to 3.7 ms + resolution 61 s to 3600 s If a value that is less than the resolution is set by using the panel or a remote command, the...

  • Page 63: Calculation Functions

    7351 Series Digital Multimeter Operation Manual 5.9 Calculation Functions Calculation Functions This instrument supports the following eight calculation functions. Item Function NULL calculation Subtracts a fixed value from a measurement value. Smoothing calculation Calculates the moving average. Scaling calculation )  C. Calculates ( dB calculation Calculates 20 log...

  • Page 64: Null Calculation

    7351 Series Digital Multimeter Operation Manual 5.9.1 NULL Calculation 5.9.1 NULL Calculation Function The NULL calculation subtracts the NULL constant from the measurement value and outputs the re- sult. Measurement data output = Measurement value - NULL constant Pressing the key performs the calculation and turns on the NULL lamp in the display sec- NULL tion.

  • Page 65: Smoothing Calculation

    7351 Series Digital Multimeter Operation Manual 5.9.2 Smoothing Calculation Change the setting value by using at the blinking position. The unit prefix is switched according to the following order. p  n    m  No unit prefix  k  M  G  T Press ENTER to apply the setting.
  • Page 66 7351 Series Digital Multimeter Operation Manual 5.9.2 Smoothing Calculation When the smoothing count, N, is set to 3, the operation is as follows. Smoothing start Measured value Measurement value output (D3+D4)/2 (D3+D4+D5)/3 (D4+D5+D6)/3 (D5+D6+D7)/3 The SM The SM lamp blinks. lamp turns on.
  • Page 67 7351 Series Digital Multimeter Operation Manual 5.9.2 Smoothing Calculation Canceling the smoothing calculation The smoothing calculation is canceled when any of the following conditions occur. • The key is pressed while the smoothing calculation is performed. • The measurement function is changed. •...

  • Page 68: Scaling Calculation

    7351 Series Digital Multimeter Operation Manual 5.9.3 Scaling Calculation 5.9.3 Scaling Calculation Function The scaling calculation equation is shown below. Measurement value M - Constant B  Constant C Display = Constant A When SCL is selected from the MATH item in MENU , the MATH lamp in the display section turns on and the scaling calculation is performed.
  • Page 69 7351 Series Digital Multimeter Operation Manual 5.9.3 Scaling Calculation Setting the numerical value of the constant The setting ranges of Constants A, B, and C are shown below. Minimum Constant Setting range resolution 0.000001E - 9 -999999.E +6 to +999999.E + 6 0.000000E - 9 The exponential part is set by using a unit prefix (p, n, , m, k, M, G, T).

  • Page 70: Db And Dbm Calculation

    7351 Series Digital Multimeter Operation Manual 5.9.4 dB and dBm Calculation 5.9.4 dB and dBm Calculation Function The dB calculation, in which the decibel conversion is performed, can be performed only in the volt- age and current measurements. The dBm calculation, which is useful to calculate the power gain per 1 mV, can be performed only in the voltage measurement.
  • Page 71 7351 Series Digital Multimeter Operation Manual 5.9.4 dB and dBm Calculation Setting Constant D The setting range of Constant D is shown below. Setting range Minimum resolution 0.000001E -9 to 999999.E + 6 0.000001E - 9 The exponential part is set by using a unit prefix (p, n, , m, k, M, G, T). Set Constant D in MENU MENU...

  • Page 72: Comparator Calculation

    7351 Series Digital Multimeter Operation Manual 5.9.5 Comparator Calculation 5.9.5 Comparator Calculation Function The comparator calculation equation is shown below. HI = (Measurement value > HI setting value) LO = (Measurement value < LOW setting value) GO = (LOW setting value  Measurement value  HI setting value) (Processing the special data) •...
  • Page 73 7351 Series Digital Multimeter Operation Manual 5.9.5 Comparator Calculation Setting the numerical value of the constant The setting ranges of the High and Low constants are shown below. Constant Setting range Minimum resolution High -999999.E +6 to +999999.E + 6 0.000001E - 9 The exponential part is set by using a unit prefix (p, n, , m, k, M, G, T).
  • Page 74 7351 Series Digital Multimeter Operation Manual 5.9.5 Comparator Calculation PASS condition setting In the PASS condition setting, each comparator calculation result (HI, GO, and LO) is specified as either PASS or not. For example, if HI is specified as the PASS condition and LO and GO are not specified as the PASS conditions, the comparator measurement result of HI is judged as PASS.

  • Page 75: Max/Min Calculation

    7351 Series Digital Multimeter Operation Manual 5.9.6 MAX/MIN Calculation 5.9.6 MAX/MIN Calculation Function This function calculates the maximum, minimum, and average values while the MAX/MIN calculation is performed. The following calculations are performed at the same time in the MAX/MIN cal- culation.
  • Page 76 7351 Series Digital Multimeter Operation Manual 5.9.6 MAX/MIN Calculation How to call the MAX/MIN calculation result Select RSLT in MENU to see the calculation results display. MENU ..3.. CALC RSLT Measurement count Maximum value Minimum value Average value Select a display item by pressing The measurement count, maximum value, minimum value, and average value are displayed in this order.

  • Page 77: 5.9.7 Statistical Calculation

    7351 Series Digital Multimeter Operation Manual 5.9.7 Statistical Calculation 5.9.7 Statistical Calculation Function This function calculates the maximum value, minimum value, average value, standard deviation, and range of the measurement data that is stored in the mea- surement memory. The following calculations are performed at the same time in the statistical cal- culation.
  • Page 78 7351 Series Digital Multimeter Operation Manual 5.9.7 Statistical Calculation How to call the calculation result The display item of the calculation results can be selected in STAT in MENU MENU ..7.. MEM (Number of samples) STAT SAMPL (Maximum value) (Minimum value) (Average value) SIGMA (Standard deviation)

  • Page 79: 5.10 Saving And Loading The Measurement Condition Settings

    7351 Series Digital Multimeter Operation Manual 5.10 Saving and Loading the Measurement Condition Settings 5.10 Saving and Loading the Measurement Condition Settings In this instrument, four files of measurement condition setting parameters can be saved in non-volatile mem- ory USER0 to USER3. For information on setting parameters, refer to Section 8.9, “System Recovery Procedure”...

  • Page 80: 5.11 Storing And Recalling The Measurement Data

    7351 Series Digital Multimeter Operation Manual 5.11 Storing and Recalling the Measurement Data 5.11 Storing and Recalling the Measurement Data This instrument includes the measurement data memory, in which the following number of measurement results can be stored. 5.11.1 Memory Store Select ON or OFF in ‘Store’...

  • Page 81: 5.12 System Settings

    7351 Series Digital Multimeter Operation Manual 5.12 System Settings 5.12 System Settings 5.12.1 Buzzer Setting Select ON or OFF in ‘BEEP’ in 9 SYS MENU The buzzer sounds. The buzzer does not sound. The buzzer does not sound regardless of the result of comparator calculation. Press to apply the setting.

  • Page 82: Relationship According To Disabling The Function

    7351 Series Digital Multimeter Operation Manual 5.12.3 Disabling Functions Table 5-4 Relationship according to Disabling the Function Function depending on the function setting Setting function Diode Continuity FREQ (AC+DC) (AC+DC) 2W/LP-2W FREQ : Automatically set to ENA or DIS according to a setting function. : Disabled if any setting functions are set to DIS, and enabled if all setting functions are set to ENA.

  • Page 83: Front Panel Disabling Function

    7351 Series Digital Multimeter Operation Manual 5.12.4 Front Panel Disabling Function 5.12.4 Front Panel Disabling Function This function disables all panel keys on the front panel in this instrument. The following shows how to set the front panel disabling function. Password setting The password is required to enable or disable the front panel keys.
  • Page 84 7351 Series Digital Multimeter Operation Manual 5.12.4 Front Panel Disabling Function Panel lock setting Set the panel lock according to the following procedure. Character Operation display section MENU MENU Press and select 9 SYS by using Press BEEP Select ‘P.Lock’ by using P.Lock P.Lock Press...

  • Page 85: Error Queue

    7351 Series Digital Multimeter Operation Manual 5.12.5 Error Queue Canceling the panel lock Cancel the panel lock according to the following procedure. Character Operation display section 1. If pressing any key while the panel lock is set, the entry layer of P.Lock is set.

  • Page 87: How To Use The Interface

    6.1.1 Response to the *IDN? Command This instrument has changed its model name from “ADCE7351A/E” to “7351A/E.” Accordingly, the response to the *IDN? command has also been changed. Note that an old model name response can also be set to maintain the compatibility with the application software.
  • Page 88 7351 Series Digital Multimeter Operation Manual 6.1.1 Response to the *IDN? Command Specification of response to *IDN? New model name ADC Corp.,xxxxx,nnnnnnnnn,mmm response xxxxx: 7351A or 7351E (Product model name) nnnnnnnnn: Serial No. mmm: Revision No. Old model name ADC Corp.,xxxxxxxxx,nnnnnnnnn,mmm...

  • Page 89: Gpib (7351A)

    7351 Series Digital Multimeter Operation Manual 6.2 GPIB (7351A) GPIB (7351A) 6.2.1 Overview The automatic measurement system can be set up easily by using GPIB (General Purpose Interface Bus) because measurement functions and parameters can be set and measurement data can be read by using the external control.

  • Page 90: 6.2.2 Precautions In Use Of Gpib

    7351 Series Digital Multimeter Operation Manual 6.2.2 Precautions in Use of GPIB 6.2.2 Precautions in Use of GPIB Do not use too long a bus cable to connect any instrument or controller. Ensure that the total cable length does not exceed 20 m. ADC CORPORATION uses the following cables as the standard bus cable.

  • Page 91: Gpib Setting

    7351 Series Digital Multimeter Operation Manual 6.2.3 GPIB Setting 6.2.3 GPIB Setting The following setting menu can be used when the GPIB is selected as the interface. Address setting MENU Enter any address from 0 to 30 in 'GP.Adr' of 8 I/F Press to apply the setting.

  • Page 92: Eia-232] (7351E + Option 03)

    7351 Series Digital Multimeter Operation Manual 6.3 RS-232[EIA-232] (7351E + Option 03) RS-232[EIA-232] (7351E + Option 03) NOTE: The RS-232 is a factory option that is applied to 7351E only. This option cannot be added after instrument delivery. 6.3.1 Overview By using the RS-232 interface, setting measurement functions and parameters of this instrument and read- ing the measured data can be remotely controlled, and the automatic measurement system can be easily built up.

  • Page 93: Setting

    7351 Series Digital Multimeter Operation Manual 6.3.2 RS-232 Setting CAUTION: This instrument cannot use the flow control performed by the X parameter (XON/XOFF). 6.3.2 RS-232 Setting Header of output data Select the following from 'HEADR' of MENU 8 I/F Press ENTER to apply the setting.

  • Page 94: Output Data Format

    7351 Series Digital Multimeter Operation Manual 6.3.3 RS-232 Output Data Format Number of stop bits MENU Select the following from 'STOP' of 8 I/F 1 bit/2 bit Press ENTER to apply the setting. Echo MENU Select the following from 'ECHO' of 8 I/F ON/OFF Press...

  • Page 95: Sample Program (Rs-232)

    7351 Series Digital Multimeter Operation Manual 6.3.4 Sample Program (RS-232) Measured data output (For the Only mode) For the Only mode, the measured data is output only if the RS-232 transmission is enabled and the transmission buffer is empty after the measurement was complete. The delimiter (<CR><LF>) is output for each measured value.
  • Page 96 7351 Series Digital Multimeter Operation Manual 6.3.4 Sample Program (RS-232) UserForm1.MSComm1.Output = "*TRG" & Chr(10) '*TRG: Triggers. 'Receives a prompt. Call rx_prompt UserForm1.MSComm1.Output = "MSR?" & Chr(10) 'MSR?: Sends the command for reading the measurement event register. Call rx_data(msr, 5) 'Reads the measurement event register (5 characters) and stores them in msr.

  • Page 97: Usb

    7351 Series Digital Multimeter Operation Manual 6.4 USB 6.4.1 Overview A USB (Universal Serial Bus), which is compliant with the USB1.1 standard, is included in this instrument as standard. By connecting multiple instruments to the USB ports on a personal computer, the functions of the instru- ments can be set, measurement data can be read from the personal computer, and the automatic measure- ment system can be set up easily.

  • Page 98: Control Signal (7351A, 7351E + Option 03)

    7351 Series Digital Multimeter Operation Manual 6.5 Control Signal (7351A, 7351E + Option 03) Control Signal (7351A, 7351E + Option 03) 6.5.1 External Trigger Terminal (TRIGGER IN) This instrument can be triggered by inputting a negative logic pulse from the external trigger terminal (TRIGGER IN) on the rear panel.

  • Page 99: Measurement Complete Signal Terminal (Complete Out)

    7351 Series Digital Multimeter Operation Manual 6.5.2 Measurement Complete Signal Terminal (COMPLETE OUT) 6.5.2 Measurement Complete Signal Terminal (COMPLETE OUT) A negative logic pulse is output from the measurement complete signal terminal (COMPLETE OUT) on the rear panel when the measurement is complete. Pulse width: Approx.

  • Page 100: Comparator Output (7351E + Option 03)

    7351 Series Digital Multimeter Operation Manual 6.6 Comparator Output (7351E + Option 03) Comparator Output (7351E + Option 03) The comparator calculation result is output from the comparator output terminal (COMPARATOR) on the rear panel as the TTL signal and the optical semiconductor relay contact signal. Specifications Connector Dsub 9-pin...

  • Page 101: Optical Semiconductor Relay Contact And Ttl Logical Output (A)

    7351 Series Digital Multimeter Operation Manual 6.6 Comparator Output (7351E + Option 03) The calculation result signals of Hi, Go, and Lo are output to the signal output pins of HI, PASS, and LO. The output to the PASS pin depends on the PASS conditions as shown in Table 6-3 and Table 6-4. Table 6-3 Optical Semiconductor Relay Contact and TTL Logical Output (a) Contact/TTL output pin Judgment result...

  • Page 102: Command Reference

    7351 Series Digital Multimeter Operation Manual 6.7 Command Reference Command Reference This section describes the command reference of this instrument. 6.7.1 Selecting the Command Language This instrument can be operated remotely by using the following commands. The command selection procedure is shown below. Select the category from the mode and press...

  • Page 103: Compatibility

    7351 Series Digital Multimeter Operation Manual 6.7.1 Selecting the Command Language 6.7.1.1 Compatibility If the R6451 command is selected, this instrument receives the R6451 command and executes it. CAUTION: In the compatibility mode, note that the operations such as the measurement timing may be different from other commands.

  • Page 104: Output Data Format

    7351 Series Digital Multimeter Operation Manual 6.7.2 Output Data Format 6.7.2 Output Data Format Measurement data output Format (1 measurement result) With header S DD...DD EDD Without header DD...DD EDD Output format of the measurement data memory When two or more measurement results are output from the measurement data memory, the comma “,”...
  • Page 105 7351 Series Digital Multimeter Operation Manual 6.7.2 Output Data Format Main header Description Measurement function DC voltage measurement (DCV) AC voltage measurement (ACV) Resistance measurement (2W) DC current measurement (DCI) AC current measurement (ACI) AC voltage (AC+DC coupling) measurement (ACV(AC+DC)) AC current (AC+DC coupling) measurement (ACI(AC+DC)) Diode measurement (Diode) Low power resistance measurement (2W...
  • Page 106 7351 Series Digital Multimeter Operation Manual 6.7.2 Output Data Format Measurement data  E (5 1/2-digit display) 9.99999E+37 Overload (OL) 9.99999E+36 OVER of the scaling calculation result 9.99999E+35 dB/dBm calculation error ddd.dddE-03 200 mV dddd.ddE-03 2000 mV dd.ddddE+00 20 V ddd.dddE+00 200 V dddd.ddE+00...
  • Page 107 7351 Series Digital Multimeter Operation Manual 6.7.2 Output Data Format ddd.dddE-03 ACI(AC+DC) 200 mA dddd.ddE-03 2000 mA dd.ddddE+00 10 A FREQ (<10 Hz) (d.dddddE+00) (<100 Hz) (dd.ddddE+00) (<1000 Hz) (ddd.dddE+00) (<10 kHz) (d.dddddE+03) (<100 kHz) (dd.ddddE+03) (<1000 kHz) (ddd.dddE+03) 200  ddd.dddE+00 LP-2W...

  • Page 108: Adc Command Reference

    7351 Series Digital Multimeter Operation Manual 6.7.3 ADC Command Reference 6.7.3 ADC Command Reference This section describes the ADC command reference of this instrument. “Initial value” shows the status when the *RST command is executed. "R6451" shows a command used when the R6451 command language is selected. A "-"...
  • Page 109 Trigger abort Moves to the IDLE state. Trigger source TRS0 IMMEDIATE selection TRS1 MANUAL TRS2 EXTERNAL (7351A, 7351E + Option 03) TRS3 TRS? Reply: One of TRS0 to TRS3 Trigger delay TRDn n: 0 to 3600 (seconds) TRD? Reply: TRD+d.ddddEdd (The position of the decimal point depends on the set- ting.)
  • Page 110 7351 Series Digital Multimeter Operation Manual 6.7.3 ADC Command Reference Initial Item Description R6451 Command value Measurement Measurement range 2W Freq (AC+DC) (AC+DC) 2W condition AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO 200  200  200 mV 200 mV 200 mV (200 mV) 2000 ...
  • Page 111 7351 Series Digital Multimeter Operation Manual 6.7.3 ADC Command Reference Initial Item Command Description R6451 value Calculation NULL calculation Reply: NL0 or NL1 KNLn NULL constant setting n:-999999.E+6 to +999999.E+6 Setting resolution: 0.000001E-9 Note: The setting is disabled when the NULL calcula- tion is set to OFF.
  • Page 112 7351 Series Digital Multimeter Operation Manual 6.7.3 ADC Command Reference Initial Item Command Description R6451 value Calculation dB/dBm calculation dB calculation OFF dB calculation ON For the voltage and current measurement functions, ON can be set. dBm calculation ON For the voltage measurement function, ON can be set. Reply: One of DB0 to DB2 Constant D n:0.000001E-9 to 999999.E+6...
  • Page 113 7351 Series Digital Multimeter Operation Manual 6.7.3 ADC Command Reference Initial Item Command Description R6451 value Calculation PASS condition LOP0 Calculation result LO is not specified as the PASS condi- range setting tion. LOP1 Calculation result LO is specified as the PASS condition. LOP? Reply: LOP0 or LOP1 MIP0...
  • Page 114 Instrument *IDN? New model name response IDN? information ADC Corp.,xxxxx,nnnnnnnnn,mmm xxxxx: 7351A or 7351E (Product model name) nnnnnnnnn: Serial No. mmm: Revision No. The new model name response is applied to software revision C00 or later. Old model name response ADC Corp.,xxxxxxxxx,nnnnnnnnn,mmm...
  • Page 115 7351 Series Digital Multimeter Operation Manual 6.7.3 ADC Command Reference Initial Item Command Description R6451 value System Prohibition of SRQ transmitting Permission of SRQ transmitting Reply: S0 or S1 Status *CLS Clears each status byte. *STB? Reads the status byte register Status Reply: ddd *SREn...
  • Page 116 7351 Series Digital Multimeter Operation Manual 6.7.3 ADC Command Reference Initial Item Command Description R6451 value System Self-Test *TST? Performs the self- test and reads the result. (It takes time to perform the self-test. Read the result after the self-test is complete.) Reply 0 : Pass 1 : Fail...

  • Page 117: Scpi Command Reference

    7351 Series Digital Multimeter Operation Manual 6.7.4 SCPI Command Reference 6.7.4 SCPI Command Reference This section describes the syntax to explain each SCPI command. The syntax, which is used when the command is sent from the external controller to this instrument, is described.
  • Page 118 7351 Series Digital Multimeter Operation Manual 6.7.4 SCPI Command Reference NOTE: When using the SCPI commands via USB, note the following point. After sending a setting command, send a query command and receive its response. Sending more than one setting command in succession may cause unintended behavior or an error to occur.
  • Page 119 :ABORt Forcibly moves to the IDLE state. Trigger source :TRIGger:SOURce IMMediate selection {IMMediate|MAN- MANual ual|EXTernal|BUS} EXTernal (7351A, 7351E + Option 03) :TRIGger:SOURce? Reply: IMM, MAN, EXT, or BUS Trigger delay :TRIGger:DELay <real>: 0 to 3600 (seconds) {<real>|MAXi- mum|MINimum} :TRIGger:DELay? Reply: +d.ddddEdd...
  • Page 120 7351 Series Digital Multimeter Operation Manual 6.7.4 SCPI Command Reference Measurement condition command Initial Item SCPI command Description value Measure- Measurement [:SENSe]:<function>:RANGe Auto-range setting ment condi- range :AUTO {ON,1|OFF,0} *1 ON, 1: Auto-range ON tion OFF, 0: Auto-range OFF This function cannot be set for the continuity, diode, and fre- quency measurements.
  • Page 121 7351 Series Digital Multimeter Operation Manual 6.7.4 SCPI Command Reference Measurement condition command Initial Item SCPI command Description value Calculation NULL calcula- [:SENSe]:<function>:REFerence ON, 1: ON tion :STATe {ON,1|OFF,0} *1 OFF, 0: OFF [:SENSe]:<function>:REFerence Reply: 1 or 0 :STATe? *1 [:SENSe]:<function>:REFerence NULL constant setting {<real>|MAXimum|MINimum} *1...
  • Page 122 7351 Series Digital Multimeter Operation Manual 6.7.4 SCPI Command Reference Initial Item SCPI command Description value Calculation dB/dBm cal- :CALCulate:DB {DB|DBM|OFF} DB: dB calculation ON culation For the voltage and current mea- surement functions, ON can be set. DBM: dBm calculation ON For the voltage measurement func- tion, ON can be set.
  • Page 123 7351 Series Digital Multimeter Operation Manual 6.7.4 SCPI Command Reference Initial Item SCPI command Description value Calculation PASS condi- :CALCulate:LIMit:PASS:LOWer {ON,1|OFF,0} ON, 1: Calculation result LOW is tion range specified as the PASS condition. setting OFF, 0: Calculation result LOW is not specified as the PASS condition.
  • Page 124 Instrument *IDN? New model name response: information ADC Corp.,xxxxx,nnnnnnnnn,mmm xxxxx: 7351A or 7351E (Product model name) nnnnnnnnn: Serial No. mmm: Revision No. The new model name response is applied to software revi- sion C00 or later. Old model name response ADC Corp.,xxxxxxxxx,nnnnnnnnn,mmm...
  • Page 125 7351 Series Digital Multimeter Operation Manual 6.7.4 SCPI Command Reference Initial Item SCPI command Description value System Status Clears each status byte. *CLS *STB? Reads the status byte register Reply: ddd *SRE <int> Sets the service request enable register. <int>: 0 to 255 (However, bit6 cannot be set.) Reply: ddd *SRE? *ESR?
  • Page 126 7351 Series Digital Multimeter Operation Manual 6.7.4 SCPI Command Reference Initial Item SCPI command Description value System Calibration ON, 1: Sets the calibration mode to ON. :CALibration:SECure:STATe {ON,1|OFF,0} OFF, 0: Sets the calibration mode to OFF. (Writes the calibration factor when leaving the calibra- tion mode.) :CALibration:SECure:STATe? Reply: 1 or 0...

  • Page 127: Status Register Structure

    7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure 6.7.5 Status Register Structure This instrument has a layered status register structure that is compliant with IEEE standard 488.2-1987 and can send various statuses of this instrument to the controller. This section describes the operation model of status structure and allocation of events.

  • Page 128: 6.7.5 Status Register Structure

    7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure The status register structure in this instrument is shown in Figure 6-4 and Figure 6-5. SRQ transmitting Figure 6-4 Status Register Structure (1/2) 6-42...
  • Page 129 7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure Figure 6-5 Status Register Structure (2/2) Event enable register Each event register has an enable register that determines which bit is to be enabled. The enable reg- ister sets the corresponding bit in decimal. •...

  • Page 130: Status Byte Register Structure

    7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure Status byte register The status byte register summarizes the information from the status register. A summary of this status byte register is sent to the controller as a service request. Therefore, the status byte register operates slightly differently than the status register structure.

  • Page 131: Status Byte Register (Stb)

    7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure This register responds to the serial polling from the controller. When the register responds to the serial polling, bit0 to bit5, bit7, and the RQS of the status byte register are read, and then the RQS is reset to 0.
  • Page 132 7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure Conditions which clear the status byte register • When the power is turned on. • When the *CLS command is executed. However, the MAV bit is not cleared if data exists in the output buffer.

  • Page 133: Standard Event Status Register (Sesr)

    7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure Standard event status register Allocation in the standard event register is shown in Table 6-6. Table 6-6 Standard Event Status Register (SESR) Name Description ON: This bit is set to 1 when all operations are complete after receiving the *OPC Operation Complete command.

  • Page 134: Measurement Event Register (Mer)

    7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure Measurement event register Allocation in the measurement event register is shown in Table 6-7. Table 6-7 Measurement Event Register (MER) Name Description ON: This bit is set to 1 when the comparator calculation result satisfies the FAIL FAIL conditions.

  • Page 135: Questionable Event Register (Qer)

    7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure Questionable event register Allocation in the questionable event register is shown in Table 6-8. Table 6-8 Questionable Event Register (QER) Name Description Voltage Overload ON: This bit is set to 1 when OL occurs in the voltage or diode measurement. Current Overload ON: This bit is set to 1 when OL occurs in the current measurement.

  • Page 136: Operation Event Register (Oer)

    7351 Series Digital Multimeter Operation Manual 6.7.5 Status Register Structure Operation event register Allocation in the operation event register is shown in Table 6-9. Table 6-9 Operation Event Register (OER) Name Description Not used Always 0 Not used Always 0 Not used Always 0 Not used...

  • Page 137: Sample Programs (Command Used In Adc Corporation)

    These samples are programmed assuming that the 7351A is used. Example 1 Measures a voltage in the DCV 20 V range and reads the measurement data from the 7351A. The GPIB address of the 7351A is set to 1 and the header is set to OFF.
  • Page 138 Example 2 Sets the measurement function to the 2W measurement, detects the measurement end by using the status byte, and reads the measurement data from the 7351A. The GPIB address of the 7351A is set to 1 and the header is set to OFF.

  • Page 139: Sample Programs (Scpi Command)

    Compatible language: Microsoft Excel Visual Basic for Application Example 1 Measures a voltage in the DCV 20 V range and reads the measurement data from the 7351A. The GPIB address of the 7351A is set to 1 and the header is set to OFF.
  • Page 140 Example 2 Sets the measurement function to the 2W measurement, detects the measurement end by using the status byte, and reads the measurement data from the 7351A. The GPIB address of the 7351A is set to 1 and the header is set to OFF.

  • Page 141: Specifications

    7351 Series Digital Multimeter Operation Manual 7. SPECIFICATIONS SPECIFICATIONS Specifications Unless otherwise specified, the measurement accuracy of this instrument is guaranteed for one year under the following conditions: Temperature; 23 5C, relative humidity; 85% or less (75% or less in a resistance measurement of larger than 20 M...

  • Page 142: Ac Voltage Measurement (Acv, Acv(Ac+Dc))

    7351 Series Digital Multimeter Operation Manual 7.1.2 AC Voltage Measurement (ACV, ACV(AC+DC)) 7.1.2 AC Voltage Measurement (ACV, ACV(AC+DC)) Measurement method True RMS measurement, RMS display Input range 5% or more of a full scale Crest factor 3:1 at a full scale (This is restricted to the maximum allowable applied voltage.) Temperature coefficient (1/10 of measurement accuracy that includes the additional error)/C in...
  • Page 143 7351 Series Digital Multimeter Operation Manual 7.1.2 AC Voltage Measurement (ACV, ACV(AC+DC)) ACV(AC+DC) Maximum display Resolution Input Range Input impedance terminal FAST/MED SLOW1, 2 FAST/MED SLOW1, 2 100 V 10 V V-COM 200 mV 199.9 199.99 1000 V 100 V 2000 mV 1999 1999.9...

  • Page 144: Resistance Measurement (2W, Lp-2W)

    7351 Series Digital Multimeter Operation Manual 7.1.3 Resistance Measurement (2W, LP-2W) 7.1.3 Resistance Measurement (2W, LP-2W) 2W measurement Temperature Measurement accuracy *1 coefficient Maximum display Resolution (% of reading + digits) (ppm of reading + Measurement Range digits)/C current MED/ MED/ FAST FAST...

  • Page 145: Dc Current Measurement (Dci)

    7351 Series Digital Multimeter Operation Manual 7.1.4 DC Current Measurement (DCI) 7.1.4 DC Current Measurement (DCI) Temperature Measurement accuracy *1 coefficient Maximum display Resolution Resistance (% of reading + digits) (ppm of reading + Input Range between input digits)/C terminal terminals MED/ MED/...

  • Page 146: Ac Current Measurement (Aci, Aci(Ac+Dc))

    7351 Series Digital Multimeter Operation Manual 7.1.5 AC Current Measurement (ACI, ACI(AC+DC)) 7.1.5 AC Current Measurement (ACI, ACI(AC+DC)) Measurement method True RMS measurement, RMS display Input range 5% or more of a full scale Crest factor 3:1 at a full scale (This is restricted to a current protection fuse rating.) Temperature coefficient (1/10 of measurement accuracy that includes the additional error)/C in each range and frequency range...
  • Page 147 7351 Series Digital Multimeter Operation Manual 7.1.5 AC Current Measurement (ACI, ACI(AC+DC)) Measurement accuracy *1 (% of reading + digits) Range 20 Hz - 45 Hz 45 Hz - 1 kHz 1 kHz - 5 kHz 200 mA 0.4+20 0.3+20 0.3+10 2000 mA 0.5+20...

  • Page 148: Frequency Measurement (Freq)

    7351 Series Digital Multimeter Operation Manual 7.1.6 Frequency Measurement (FREQ) 7.1.6 Frequency Measurement (FREQ) Measurement method Reciprocal Measurement accuracy Measurement frequency range (Sinusoidal wave) 10 Hz - 300 kHz 0.02% of reading A frequency over the above range is displayed but not guaranteed. Input signal voltage range 100 mVrms to 700 Vrms and 10% of each voltage range or more (sinu- soidal wave)

  • Page 149: Continuity Measurement

    7351 Series Digital Multimeter Operation Manual 7.1.7 Diode Measurement 7.1.7 Diode Measurement Temperature Measurement accuracy *1 coefficient Maximum display Resolution (% of reading + digits) (ppm of reading + Measurement Range digits)/C current MED/ MED/ FAST FAST FAST SLOW1, 2 AZ ON AZ OFF SLOW1, 2...

  • Page 150: Measurement Time And Display Digits

    7351 Series Digital Multimeter Operation Manual 7.1.9 Measurement Time and Display Digits 7.1.9 Measurement Time and Display Digits For HOLD OFF (Trigger source: IMMED) Measurement speed (In Auto-range OFF) RATE setting Integration time ACV(AC+DC) 2W Continuity ACI(AC+DC) LP-2W Diode FAST 140 times/s (7.1 ms) 30 times/s (33 ms) 2 ms...
  • Page 151 7351 Series Digital Multimeter Operation Manual 7.1.9 Measurement Time and Display Digits For HOLD ON (Trigger source: BUS) Measurement speed (In Auto-range OFF) Integration RATE setting ACV(AC+DC) time 2W Continuity ACI(AC+DC) LP-2W Diode FAST 74 times/s (13.5 ms) 42 times/s (23.5 ms) 2 ms MED (50 Hz) 31 times/s (32 ms)

  • Page 152: 7.1.10 Calculation Functions

    7351 Series Digital Multimeter Operation Manual 7.1.10 Calculation Functions 7.1.10 Calculation Functions • NULL calculation Display value (NULL) = Measurement value - NULL constant • Smoothing calculation Display value (SM) = Moving average over a specified number of measurements • Comparator calculation Display (HIGH) ...

  • Page 153: Interface Specifications

    7351A GPIB, USB, External trigger signal, Complete signal output Standard Compliance with USB1.1 Connector Type B GPIB (7351A) Standard Compliance with IEEE488.2 Connector 24-pin Anphenol Interface functions SH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT1, C0, E2...
  • Page 154 TTL Output Output level TTL Selecting the positive or negative logic Maximum allowable applied voltage 12 Vpeak External trigger signal (7351A, 7351E + Option 03) Connector Signal level TTL Detecting the falling edge 1 s or more Pulse width...

  • Page 155: General Specifications

    Input method Floating Measurement method Integration Overload display Trigger function External trigger (7351A, 7351E + Option 03) Memory Data memory: Up to 20,000 data Condition setting memory: 4 (USER0 to USER3) Power supply AC power supply: 100 V/120 V/220 V/240 V...

  • Page 157: Maintenance

    7351 Series Digital Multimeter Operation Manual 8. MAINTENANCE MAINTENANCE This chapter describes the following information which relates to the maintenance of this instrument. 8.1 Replacing Fuses 8.2 Cleaning 8.3 Calibration 8.4 Replacing Parts with Limited Life 8.5 Product Disposal and Recycle 8.6 Storage 8.7 Transportation 8.8 Notes Regarding Repair, Replacement, and Periodic Calibration...

  • Page 158: How To Check Protection Fuses

    7351 Series Digital Multimeter Operation Manual 8.1.2 Replacing a Protection Fuse 8.1.2.1 How to Check Protection Fuses Measure the resistance of the protection fuse and check that the fuse is not open. This instrument can measure the resistance of the protection fuse by connecting the terminals as shown in Figure 8-1.

  • Page 159: How To Replace Protection Fuses

    7351 Series Digital Multimeter Operation Manual 8.1.2 Replacing a Protection Fuse 8.1.2.2 How to Replace Protection Fuses Rotate the fuse cap in the counter-clockwise direction by using a flathead screw- driver and remove the fuse. Replace with a fuse, which is compliant with the standard and listed in Table 3- 1, and secure the fuse cap.

  • Page 160: Cleaning

    7351 Series Digital Multimeter Operation Manual 8.2 Cleaning Cleaning This section describes the cleaning procedure of this instrument and warning messages. WARNING: To prevent accidents caused by electric shocks, remove all cables from this instrument. Never attempt to remove the cover to clean the inside of this instrument. 8.2.1 Cleaning the Outside Use a soft or damp cloth to clean this instrument.

  • Page 161: Calibration

    7351 Series Digital Multimeter Operation Manual 8.3 Calibration Calibration To maintain the measurement accuracy of this instrument, perform calibration at least once a year; warranty period. 8.3.1 Preparing for Calibration Power supply Use an AC power supply in a voltage range listed in Table 3-4 and frequency of 50 Hz or 60 Hz. Environment Perform calibration in following conditions.

  • Page 162: Calibration Point

    7351 Series Digital Multimeter Operation Manual 8.3.3 Calibration Point 8.3.3 Calibration Point Perform calibration for each range of each measurement function. For more information on relation- ships between functions and ranges, refer to Table 5-2. First, calibrate the zero point in each range calibration. In the DC voltage measurement and DC current measurement, calibrate the zero point and full-scale point.

  • Page 163: Calibration Point

    7351 Series Digital Multimeter Operation Manual 8.3.3 Calibration Point Table 8-1 Calibration Point (2 of 2) Measurement Range Zero Calibration point1 Calibration point2 Calibration point3 function 200  190  LP-2W Short 2000  1900  Short 20 k Short 19 k...

  • Page 164: Calibration Procedure

    7351 Series Digital Multimeter Operation Manual 8.3.4 Calibration Procedure 8.3.4 Calibration Procedure Perform calibration in following procedure. Set the calibration mode. Short-circuit the V and COM terminals and then open the mA and 10 A termi- nals. Calibrate the zero point in a function and range to be calibrated. Connect the calibration standard to the input terminal.
  • Page 165 7351 Series Digital Multimeter Operation Manual 8.3.4 Calibration Procedure HOLD Pressing the key displays the measurement value as a setting value. Adjust the setting value to the calibration value by using the , and keys. EXIT NOTE: Press the key if calibration must be cancelled due to a mistake such as entering an incorrect number.
  • Page 166 7351 Series Digital Multimeter Operation Manual 8.3.4 Calibration Procedure NOTE: AUTO RATE TRIG NULL , and keys are disabled in the calibration mode. 8 I/F 9 SYS MENU Only can be selected in Before turning off the power, cancel the calibration mode. Calibration data is stored in internal nonvolatile memory and written in it at once when the calibration mode is canceled.

  • Page 167: Replacing Parts With Limited Life

    7351 Series Digital Multimeter Operation Manual 8.4 Replacing Parts with Limited Life Replacing Parts with Limited Life Parts with limited life used in this instrument are listed in the following table. Contact an ADC CORPORATION sales representative to replace any parts, referring to the limited lives listed in the following table.

  • Page 168: Product Disposal And Recycle

    7351 Series Digital Multimeter Operation Manual 8.5 Product Disposal and Recycle Product Disposal and Recycle Disposal of this product should comply with the regulations and laws that are established by your country and municipality. When treating this product, separately collect components according to this chapter to prevent the spread of substances, which may be harmful to humans, and to protect the global environment.
  • Page 169 7351 Series Digital Multimeter Operation Manual 8.5 Product Disposal and Recycle Quantity in Used/ Substance/Component Location Unit Component maximum Not used configuration Components containing Not used radioactive substances Electrolyte capacitors con- Not used taining substances of con- cern (height > 25 mm, diameter >...

  • Page 170: Storage

    7351 Series Digital Multimeter Operation Manual 8.6 Storage Storage If not using this instrument for a long time, put it in a carton case and store it in an area away from dust and direct sunlight. Storage temperature: -25C to +70C Transportation When transporting this instrument, use the packing materials used for the shipping of this instrument or equivalent materials (thickness of carton case is 5 mm or more).

  • Page 171: Notes Regarding Repair, Replacement, And Periodic Calibration

    7351 Series Digital Multimeter Operation Manual 8.8 Notes Regarding Repair, Replacement, and Periodic Calibration Notes Regarding Repair, Replacement, and Periodic Calibration 8.8.1 Before Asking for Repair Before asking for repair, refer to and check Table 8-3. Table 8-3 Before Asking for Repair Problem Check item Solution...

  • Page 172: Contacting Adc Corporation For Repair Or Calibration

    7351 Series Digital Multimeter Operation Manual 8.8.2 Contacting ADC CORPORATION for Repair or Calibration 8.8.2 Contacting ADC CORPORATION for Repair or Calibration When sending this instrument to ADC CORPORATION sales representative, attach a tag that indicates the following information. • Your company name and address •...

  • Page 173: System Recovery Procedure

    7351 Series Digital Multimeter Operation Manual 8.9 System Recovery Procedure System Recovery Procedure Initialization The following shows how to initialize the setting parameters. 6 INIT Select from the mode and press to enter the selection MENU layer. The ‘Param’ parameter is displayed. Press to enter the entry layer.

  • Page 174: Initial Values Of Setting Parameters

    7351 Series Digital Multimeter Operation Manual 8.9 System Recovery Procedure Table 8-4 Initial Values of Setting Parameters (1 of 2) Selecting ‘LOAD’ in 5PARAM Selecting When DFLT from Parameter P.OFF from *RST *CLS shipping 6INIT in DFLT USER setting ‘PON.LD’ MENU Function Saved value DCV...
  • Page 175 7351 Series Digital Multimeter Operation Manual 8.9 System Recovery Procedure Table 8-4 Initial Values of Setting Parameters (2 of 2) Selecting ‘LOAD’ in 5PARAM Selecting When DFLT from Parameter P.OFF from *RST *CLS shipping 6INIT in DFLT USER setting ‘PON.LD’ MENU Stop bits Saved value...

  • Page 176: 8.10 Self-Test

    7351 Series Digital Multimeter Operation Manual 8.10 Self-Test 8.10 Self-Test 8.10.1 Self-Test The self-test can be performed from the panel operations or by executing the remote command. The self-test is performed by selecting ‘TEST’ from or executing the *TST? 9 SYS MENU remote command.
  • Page 177 7351 Series Digital Multimeter Operation Manual 8.10.2 Display and Key Tests Operations Display Select ‘P/KEY’ by using P/KEY P/KEY Press ENTER All segments Press ENTER of the display are turned on. The display changes after a few seconds. Push Press a key to be checked. Key name to be pressed To quit the key test, press...

  • Page 178: 8.11 Error Message List

    7351 Series Digital Multimeter Operation Manual 8.11 Error Message List 8.11 Error Message List This section describes the error number and how to deal with error displayed on this instrument. Error description Error display Solution [ ]: Response to the ERR? command Err1 RAM read/write error Repair...
  • Page 179 7351 Series Digital Multimeter Operation Manual 8.11 Error Message List Error description Error display Solution [ ]: Response to the ERR? command Err216 1/500 ATT measurement test error in analog operation Repair [ATT 1/500 Check] Err500 Calibration data error Solution3 [CAL data] Err501 ZERO calibration is not performed.
  • Page 180 7351 Series Digital Multimeter Operation Manual 8.11 Error Message List Solution1 Set the correct function. Solution2 Check the USB cable connection. Solution3 Calibrate according to the correct procedure. Solution4 Perform the ZERO cancellation. Solution5 Send the correct command. Solution6 Check the settings. Solution7 Re-calibrate.

  • Page 181: Dimensional Outline Drawing

    DIMENSIONAL OUTLINE DRAWING EXT-1...
  • Page 183 ALPHABETICAL INDEX ALPHABETICAL INDEX 7351 Series Digital Multimeter Operation Manual ALPHABETICAL INDEX Control Signal (7351A, 7351E + Option 03) ....6-12 AC Current Measurement (ACI and ACI (AC+DC)) ....... 4-12 AC Current Measurement (ACI, ACI(AC+DC)) ......7-6 dB and dBm Calculation ......5-24 AC Voltage Measurement DC Current Measurement (DCI) ....
  • Page 184 7351 Series Digital Multimeter Operation Manual Alphabetical Index MAINTENANCE ........8-1 Rear Panel Description ......4-5 MAX/MIN Calculation ......5-29 Removing the Case ......... 2-1 Measurement Complete Signal Terminal Replacing a Power Fuse ......8-1 (COMPLETE OUT) ....... 6-13 Replacing a Protection Fuse ....8-1 Measurement Function and Replacing Fuses ........

  • Page 185: Alphabetical Index

    7351 Series Digital Multimeter Operation Manual Alphabetical Index USB ............6-11 USB Specifications ......... 6-11 USBid Setting ......... 6-11...

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