Hioki DSM-8542 Instruction Manual
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Hioki DSM-8542 Instruction Manual

Hioki DSM-8542 Instruction Manual

Digital super megohmmeter
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Instruction Manual
DSM-8542
DIGITAL SUPER
MEGOHMMETER
July 2013 Revised edition 1 DS8542A981-01 13-07H

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Summary of Contents for Hioki DSM-8542

  • Page 1 Instruction Manual DSM-8542 DIGITAL SUPER MEGOHMMETER July 2013 Revised edition 1 DS8542A981-01 13-07H...
  • Page 3 Preface Thank you for purchasing the DSM-8542 and welcome to the growing family of HIOKI’s Digital Super Megohm Meters/Current Meters. The DSM-8542 is an insulation resistance meter up to 1000V in measuring voltage. Incorrect operation of the meter potentially causes an electric shock or damage to a sample.
  • Page 4 Data save and search functions Histogram display function Sequence programming function Interlock function GP-IB is a standard provision Handler interface is a standard provision RS-232 is a standard provision About This Operational Manual • Warning, Caution and Notice Important safety precautions and operational instructions are described in this manual under the following headings.
  • Page 5 III. Organizational Elements of Operational Manual This operational manual has the following chapters. Please make certain to read the manual carefully before operating the meter. Preparations Before Operation This chapter contains important information such as a check to be made during uncrating, operating power supply and measuring cables.
  • Page 6 Safety Precautions FOR SAFE USE OF THE METER • Do the power supply voltage of the meter and commercial power supply voltage to be supplied match? Please check it. Supplying 200V power supply voltage while the power supply voltage of the meter is 100V sometimes causes damage to the meter. •...

  • Page 7: Table Of Contents

    2.4.1 Special options ··················································································9 2.4.2 Common options ················································································9 3. Operating Principles 3.1 Operating Principles ······································································· 10 3.2 Block Diagram of DSM-8542····························································· 11 4. Names and Functions of Components 4.1 Safety Alert Symbols······································································· 12 4.2 Front Panel ··················································································· 13 4.3 Rear Panel ··················································································· 16 4.4 Command/Numeric Input Keys ··························································...
  • Page 8 5. Preparations for Measurement 5.1 Connecting Meter and Power Supply Unit············································ 22 5.1.1 Connecting dedicated power supply unit PSU8541 ····························· 22 5.1.2 Connecting power supply other than dedicated power supply unit ·········· 22 5.2 Setting Measuring Conditions ··························································· 25 5.2.1 Screen types ·············································································· 27 5.2.2 Setting measuring mode································································...
  • Page 9 6.6 Ending Measurement ······································································ 70 6.7 Measurement Check ······································································· 70 6.7.1 Voltage check ············································································· 70 6.7.2 Contact check ············································································· 71 7. GP-IB Interface 7.1 Overview ······················································································ 73 7.2 Specification ················································································· 73 7.3 Talker Function·············································································· 74 7.4 Response to Query Program Message················································ 76 7.5 Listener Function ···········································································...
  • Page 10 10.2.2 Calibration of measuring voltage ·················································· 124 10.2.3 Calibration of current measurement ·············································· 124 10.3 Self-calibration Function································································ 125 10.4 Self-diagnosis Function································································· 126 10.5 Service Organization of HIOKI························································ 127 10.6 Storage and Moving ····································································· 127 11. Product Full View ········································································ 128...

  • Page 11: Preparations Before Operation

    Preparations Before Operation during Uncrating This product has been inspected carefully at the HIOKI factory in preshipment inspection. Nevertheless, check the following items when uncrating the crate. 1) Any damage on the exteriors of the product. 2) Quantities of accessories Check in accordance with Table 1.1 List of Accessories.

  • Page 12: Grounding

    However, memory initialization also automatically clears data saved by the save function. Memory initialization will set the values that were set during preshipment inspection at the HIOKI factory shown in Table 7.9 “Settings by Factory Preshipment Inspection and Values Initialized by Message.”...

  • Page 13: Specification

    [Remarks] The resistance measurement accuracy greatly affects the accuracies of voltage impressed and of current measured. The DSM-8542 specifies only the current accuracy as a specification. The resistance accuracy is calculated by the following formula assuming current measurement is a full-scale value.

  • Page 14: Resistance Measurement

    2.1.2 Measuring voltage output The output is determined by voltage and current of the power supply input from the rear panel. 1) Complies with 2.5 “Specification for Dedicated Power Supply Unit PSU-8541” when the dedicated power supply unit PSU-8541 is used. 2) The screen for operation of the DSM8542 is programmed assuming PSU-8541 will be used.

  • Page 15: Self-Calibration Function And Self-Diagnosis Function

    2.2.4 Self-calibration function and self-diagnosis function The self-calibration function and self-diagnosis function are executed by keying the Execute key or by the Execute command from the interface. Self-calibration can be executed automatically after setting an interval. Self-diagnosis is executed automatically when the power is turned on. Execution items: Self-calibration: A/D converter calibration and calibration of current range for each set period (can be executed automatically)

  • Page 16: Measuring Sequence Program

    2.2.7 Measuring sequence program Up to ten measuring sequence patterns of discharge, charge, measurement and discharge can be programmed. Description Program sequence (1) Discharge 1, (2) charge, (3) measurement (4) discharge 2 Settable patterns Set time range 999.9s 2.2.8 Storage and display functions of measured data (1) Measured data buffer Measured data up to 1000 data groups for four individual channels is sequentially stored and displayed by scrolling.

  • Page 17: Input And Output Functions (External Control Interfaces)

    2.2.11 Input and output functions (external control interfaces) (1) GP-IB interface All items that are operated on the panel can be GP-IB controlled. Measured results comprising 5-digit exponential measured values, comparison results and check of measured state are sent in one line of data strings. Responses in 4-digit fixed decimal points or 5-digit integers are sent to query commands.

  • Page 18: General Specifications

    2.3 General Specifications General Specifications HIOKI-specification insulation meter input connector (INPUT) Red binding post (OUTPUT) Operating environment Temperature 5 to 35°C, humidity 85% or less Power supply voltage AC 100V ±10% (standard), 115/220/240V ±10% (factory option) AC 100V ±10% (dedicated power supply unit PSU-8541) Power supply frequency 50／...

  • Page 19: Special Options

    Length 1m, red 0GA00008 Length 1m, black Interlock connection cable DSM8104F Length 0.1m 2.4.2 Common options The options common to all HIOKI insulation meters are as follows. Option Product Name Remarks Electrode for planar sample SME-8310 Equipped with changeover switch for (The main electrode dia.

  • Page 20: Operating Principles

    Operating Principles Operating Principles Equipped with four channels of high-sensitivity current measuring units, this meter calculates an insulation resistance value based on measuring voltage set in a dedicated voltage source and impressed to the work and measured current value. The meter also outputs a current value and can be used also as a 4-channel high-sensitivity ammeter in addition to its use as an insulation resistance meter.

  • Page 21: Block Diagram Of Dsm-8542

    Block Diagram of DSM-8542...

  • Page 22: Names And Functions Of Components

    Names and Functions of Components [Notice] In the following descriptions, characters enclosed by “[ ]” such as [ENTER] are the characters printed on key tops. Characters enclosed by “ ” such as “POWER” are the characters printed on the panels. Safety Alert Symbols The following safety alert symbols are placed on the front and rear panels of this meter.

  • Page 23: Front Panel

    Front Panel The front panel of the DSM-8542 is illustrated below. 1: “POWER” switch The power supply switch to select power on and off. Press this switch once to depress it to turn the power on. Press once again to pull up the key and to turn the power off.
  • Page 24 9: Command/numeric input keys Operate the keys when setting parameters. Pressing the [SHIFT] key changes the keys to the numeric input keys. 10: [F1]/“TRIG MODE” [F2]/“COMP ON/FF” [F3]/“V. CHK ON/OFF” [F4]/“C. CHK ON/FF” [F5]/“P.SET” These keys are the function keys. The functions of these keys are displayed on the LCD screen above the keys.
  • Page 25 15: “INPUT” terminal [CH4] The connector for measurement input. The connector of a double structure comprising a center conductor and outer conductor connecting to measurement input and to the “CH3&CH4” of the “VOLTAGE INPUT” connector on the rear, respectively. The connector has a floating potential common with CH3.

  • Page 26: Rear Panel

    Rear Panel The rear panel of the DSM-8542 is illustrated below. 20: “AC LINE 50/60Hz” connector The connector for input of power supply voltage. 21: “VOLTAGE INPUT” connector The connector to supply voltage needed for insulation resistance measurement. Supplies voltage to both [CH1&CH2] and [CH3&CH4].

  • Page 27: Command/Numeric Input Keys

    Command/Numeric Input Keys The command/numeric input keys have the following functions: ７ ８ ９ M ON I COMP DA TA SH IF T M OD EL EC SE TU P L OC A L OP E N P RO G V.CHK C.
  • Page 28 MO NI COMP DA TA SH IF T M OD EL EC SE TU P L OC A L P RO G O PE N V.CHK C. CH K ０ LO C K L CDOF MA N. T E N T E R [PROG]/“1”: Program The key to move to the sequence program creation screen.
  • Page 29 M ON I COMP D ATA S HI FT MO D S ET UP LOCAL E LEC O PE N PRO G V.CH K C. CHK ０ ENTER LOCK L CDOF MA N. T [MONI]/“7”: Monitoring The key to change over the Regular Measurement screen and Sequential Measurement monitoring screen.

  • Page 30: Display Screen

    Display Screen The display screen of the DSM-8542 is illustrated below. “REMOTE” When in the Remote mode (GP-IB or RS-232 mode), a side mark (“◄”) will be displayed on the screen. The Remote mode is not set when the side mark is not displayed.
  • Page 31 “TRIG-INT” When in the Internal Trigger mode, a side mark (“►”) will be displayed on the screen. “TRIG-MAN” When in the Manual Trigger mode, a side mark (“►”) will be displayed on the screen. “TRIG-EXT” When in the External Trigger mode, a side mark (“►”) will be displayed on the screen.

  • Page 32: Preparations For Measurement

    Table 1 or its equivalent. 5.1.2 Connecting power supply other than dedicated power supply unit Fig. 5.2 illustrates connection of the DSM-8542 and external power source other than PSU-8541. Use a cable for connection matching specification requirements of the...
  • Page 33 Fig. 5.1 Connecting DSM-8542 and PSU-8541 Front Measuring Jig Side List of Connection Cables Connected To Cable A(-) V.CONTROL DSM-8542 connection cable A VOLTAGE DSM-8542 connection cable B INPUT-OUTPUT Interlock DSM8104F A(-) Measuring Lead 0GE0001,0GE0002 and others B(-) *: (-) side is connected...
  • Page 34 Fig. 5.2 Connection of DSM-8542 and external power source other than PSU-8541 Cautions In case the dedicated power supply unit PSU-8541 is not used, 1) Voltage control requires control of GP-IB and other interfaces in addition to the meter. 2) Discharge during voltage off is...

  • Page 35: Setting Measuring Conditions

    Setting Measuring Conditions The meter is capable of setting measuring methods and measuring conditions beforehand so that insulation resistances of materials, parts and circuits can be measured easily under preset conditions. Before explaining about measurement, this chapter describes setting of various measuring conditions.
  • Page 36 POWER again and execute the self-diagnosis one more time. If there are still items with [NG] even after the power is resumed and a self-diagnosis test is executed, please contact the nearest HIOKI office for repair. [Notice] In addition to a [Self-diagnosis function], this meter has a [Self-calibration function] which allows users to execute self-calibration checks at preset intervals.

  • Page 37: Screen Types

    5.2.1 Screen types Set the various measuring conditions and other items in accordance with the screen on the front panel. Two screens are available - Measured value display screen and setting screen. (a) The Measured Value Display screen displays results of measurement. (b) The setting screen is for setting measuring conditions and other items.
  • Page 38 Table 5.1 Screen Types Screen Type Screen Meter Status Measured value Regular measurement screen Measuring display screen Display of 4 channels waiting for key input Sequential Measurement Monitoring screen Measuring Display of 1 channels waiting for key input Setting screen Comparison Measurement Setting screen Waiting for key input Acquired Data screen...
  • Page 39 Measuring condition display Side mark display Measured value display Side mark display ◄ □ REMOTE MEAS COND ［ １ ］ ４ ０ ６ ２ ４ Ｅ ＋ １ ５ Ω Ｒ Ｖ Ｒ ： Ｈ Ｌ Ｄ ７ Ｐ Ｏ Ｗ Ａ ◄...
  • Page 40 Table 5.3 Meanings of Side Marks Panel Side Status Character Mark ◄ In external remote mode REMOTE ◄ KEY LOCK In key lock mode ◄ Interlock in operation ([START] disabled) INTERLOCK ◄ Data buffer is full BUF.FULL ◄ “CHARGE” terminal can be used CHARGE ON ◄...
  • Page 41 Table 5.4 Measuring Conditions Set Item Description Setting Range (Specified Value) Resolution Function Key POWA Set voltage 0.1 ~ 250 V 0.1 V [ F2 ] DOWN range 251 ~ 1000 V [ F3 ] UP (0.1,0.5,1,2.5,5,10,25, 50,100,250,500,1000) POWB Set voltage 0.1 ~ 10 V 0.1 V [ F2 ] DOWN...
  • Page 42 Measuring conditions are set on the Measured Value Display screen after pressing the [F5] PSET key. To facilitate settings and to enable selection of a value operating the function keys [F2] to [F5], a specified value is given to each condition. To reset after finishing setting, press the [ENTER] key.

  • Page 43: Setting Measuring Mode

    Table 5.5 Setting keys and function keys for setting screen change Setting Key Function Key Setting Screen [ COMP ] Comparison Measurement Setting screen (See 5.2.2) [ DATA ] Acquired Data screen (See 5.2.4 onward) [ F1 ] HIST Histogram display screen [ F2 ] SETH Histogram display threshold setting screen [ F3 ] CLRH...

  • Page 44: Setting Measuring Voltage

    5.2.3 Setting measuring voltage (1) Keying (a) Press the [F5] PSET key to enter into the Measuring Condition Setting mode. (b) Input voltage after moving to “POWA:” or “POWB:” operating the cursor moving keys ([◄], [►], [▲] and [▼]). Voltage can be input by directly inputting on the numeric keys or by selecting from the following preset values.

  • Page 45: Setting Current Limiter

    5.2.4 Setting current limiter This meter limits a current flowed to the work by a current limiter to expedite charging to the circuit to be measured and to prevent damage to the measured circuit. These circuits are incorporated in the dedicated power supply unit PSU-8541, which has the “CHARGE”...

  • Page 46: Setting Measuring Range

    The low-noise mode with the filter turned on is set during preshipment inspection of the meter at the HIOKI factory. 5.2.5 Setting measuring range The meter consists of a high-sensitivity current measuring unit and a measuring voltage output unit and calculates an insulation resistance value based on a measured current value and measuring voltage.

  • Page 47: Setting Integral Time (Sampling Time)

    Table 5.6 Integral Time and Full-scale Current Values of Various Ranges Range Integral Time Code 10ms 20ms 100ms 300ms 10mA 3.0mA 1.5mA 300µA 100µA 1.0mA 300µA 150µA 30µA 10µA 100µA 30µA 15µA 3µA 1µA 10µA 3.0µA 1.5µA 300µA 100nA 1.0µA 300nA 150nA 30nA...

  • Page 48: Setting Averaging Function

    5.2.7 Setting averaging function The averaging function curbs dispersions of measured values by averaging measured results. This function is enabled when the Trigger mode is internal trigger ([INT]). (1) Keying (a Press the [F5] PSET key to set the Measuring Condition Setting screen. On the Measuring Condition Setting screen, the [F4] and [F5] keys change to keys that select ON and OFF, respectively.

  • Page 49: Creating A Program

    Set a time for Discharge 2 and remove a sample after hazardous voltage is thoroughly discharged. [Notices] 1. When shut down, the DSM-8542 is always in a discharge state. Set Discharge 1 when necessary taking the jig and scanner that have contacted the outside into consideration.
  • Page 50 (1) Press the [PROG] key on the Measurement screen. The following Sequence Program Creation screen will be displayed. Ｍ Ａ Ｋ Ｅ Ｓ Ｅ Ｑ Ｕ Ｅ Ｎ Ｃ Ｅ Ｐ Ｒ Ｏ Ｇ Ｒ Ａ Ｍ Ｐ Ｒ Ｏ Ｇ Ｒ Ａ Ｍ Ｎ...

  • Page 51: Setting Measured Data Buffer Function

    5.2.10 Setting measured data buffer function (1) Press the [DATA] key. (MEASURED RESULT DATA) Move to the screen for selecting functions for totaling measured results (histogram data counter, measured data buffer). (See Fig. 5.21) (2) Data buffer display ([DATA], ROLL) Press the [F5] ROLL key (SCROLL DATA BUFFER) on the Function Select screen.
  • Page 52 (3) Erasing data buffer ([DATA], CLRD) Press the [F4] CLRD key in the function selection screen. (See Fig. 5.21) The screen moves to the Data Buffer Erase screen shown in Fig. 5.10. Ｃ Ｌ Ｅ Ａ Ｒ Ｄ Ａ Ｔ Ａ Ｂ...

  • Page 53: Setting Operating Environment

    5.2.11 Setting operating environment ([SETUP]) Press the [SETUP] (SET UP) key on the Measurement screen. The screen changes to the Operating Environment Setting screen. (See Fig. 5.11) ［ １ ］ ４ ． ０ ６ ２ ４ Ｅ ＋ １ ５ Ω Ｒ Ｖ Ｒ...

  • Page 54: Self-Calibration Setting

    The function key [F5] will change to EXEC (EXECUTE). Pressing the [F5] EXEC key will start self-diagnosis. The self-diagnosis test automatically carries out a memory check, A/D converter self-calibration check and range self-calibration check, displaying OK (acceptable) or NG (not acceptable) on the screen. Fig.

  • Page 55: Setting Measuring Voltage Source ([Setup], Powr)

    (2) Setting measuring current limit value Set a measuring current limit value in “CURL IM: 0/5/10/25/50mA.” This current limit sets a current limit value for the current source supplied by PSU-8541 to the DSM-8542. A value can be set for four channels simultaneously.
  • Page 56 Select the high-speed changeover mode with the filter turned off in measurement that requires fast changeover of measuring voltage. The low-noise mode with the filter turned on is set during preshipment inspection of the meter at the HIOKI factory Table 5.8 Current Limit Values (Example when PSU-8541 is used) Voltage...

  • Page 57: Setting High-Speed Measuring Mode ([Setup], Fast)

    5.2.15 Setting high-speed measuring mode ([SETUP], FAST) (1) Press the [F4] FAST (FAST) key on the Operating Environment Setting screen. The screen will change to the Current Limit Value Setting screen for high-speed measurement. (See Fig. 5.16) This screen is contained in the Current Limit Value Setting screen of the measuring voltage source.
  • Page 58 The External Interface Condition Setting screen is divided into two pages. Ｃ Ｏ Ｎ Ｆ Ｉ Ｇ Ｕ Ｒ Ａ Ｔ Ｉ Ｏ Ｎ Ｐ Ａ Ｇ Ｅ － １ ／ ２ Ｉ Ｎ Ｔ Ｅ Ｒ Ｌ Ｏ Ｃ Ｋ ： Ｃ Ｏ Ｎ Ｅ Ｃ Ｔ ／ Ｃ Ｕ Ｔ Ｏ Ｆ Ｆ Ｂ...
  • Page 59 (4) Key click tone setting Set “CLICK: OFF/ON” on “PAGE-1/2.” OFF:Click tone is not sounded. ON: Click tone is sounded. (5) GP-IB address setting Set “GP-IB ADDR” on “PAGE-2/2.” An address 0 to 30 can be set. Input an address value operating the numeric input keys and press the [ENTER] key to set.

  • Page 60: Display And Processing Of Measured Value

    Display and Processing of Measured Value 5.3.1 Displaying measured value Measured values are displayed on the Measured Value Display screen, to display measured results and measuring conditions. As shown in Fig. 5.1, the Measured Value Display screen is split into the Regular Measurement screen and Sequential Measurement Monitoring screen.

  • Page 61: Comparison Measurement

    5.3.2 Comparison measurement Set conditions for comparing a measured value with permissible upper-limit and lower-limit values and for automatically deciding acceptable or not acceptable. Press the [COMP] (SET COMPARE PARAMETER) key. The screen changes to the screen to set comparison measurement conditions. (See Fig.

  • Page 62: Deviation Display

    Set the value input by pressing the [ENTER] key. Press the [ENTER] key to finish setting and to return to the Measurement screen. The setting ranges for UPPER and LOWER are limited depending on the measuring mode. See Table 5.10. Table 5.10 Setting Ranges by Measuring Mode Measuring Mode Setting Range...

  • Page 63: Creating Histogram

    (2) Setting Deviation Display mode Select an item by operating the [▲] and [▼] keys. Select a setting mode operating the [◄] and [►] keys. The selected mode will be highlighted. The modes have the following meanings. OFF: Deviation is not displayed. DEV: Displays (measured value - reference value).
  • Page 64 (2) Histogram threshold setting Press [F2] SETH (SET HISTOGRAM) on the Function Select screen. The screen changes to the screen for setting nine thresholds for creating a histogram. Ｄ Ａ Ｔ Ａ Ｔ Ｈ Ｒ Ｅ Ｓ Ｈ Ｏ Ｌ Ｄ Ｈ...
  • Page 65 (4) Histogram display Press the [F1] HIST (HISTOGRAM) key on the Function Select screen to change to the Histogram Display screen. Ｃ Ｈ ： １ ／ ２ ／ ３ ／ ４ Ｍ Ｏ Ｄ Ｅ ： Ω － － － － － － － － － ＋ － － － － － － － － － ＋ － － － － － － － － － ＋ ［...

  • Page 66: Measurement

    6. Measurement Works for insulation resistance are diverse in materials, shapes, electrical characteristics and other parameters. Insulation resistance is measured by various methods suiting these parameters. This chapter describes the measuring terminals of the meter and measuring methods for insulation resistance that are suitable to various works. Functions of and Connecting Measuring Terminals 6.1.1 Functions of measuring terminals The functions of the measuring terminals located on the front panel are described.

  • Page 67: Connecting Measuring Terminals

    Noise that is generated by the measuring cable sometimes hampers stable measurement of high resistance. Use a low-noise shielded-conductor cable meeting the specification of HIOKI as a cable connected between the “INPUT” terminal and sample for stable measurement. Measuring Parts, Circuits and Other Items Measurement is taken by setting the mode to the “Resistance Measurement”...
  • Page 68 Using an example of a holder with a guard function illustrated in Fig. 6.1 and Fig. 6.2. The diagrams show an example of connection between CH1 equipment and the DSM-8542. Fig. 6.1 Example of Holder with Guard （ ａ ）...

  • Page 69: Auto Measurement

    The equivalent circuit shows that Current i flowing through the sample and current i that flows through Insulating Materials a and b both flow to the input circuit through the Terminal B. Next, using a meal plate for example as the holder plate of the holder and connecting it to the “GUARD”...
  • Page 70 The power supply unit of the meter is an external unit. HIOKI’s dedicated power supply unit PSU-8541 (option) has a charging current source of 20 circuits specifically for this purpose.

  • Page 71: When Measuring Jig Is Not Used

    6.2.3 When measuring jig is not used When making measurement without using a jig or other means, use a measuring lead with a test rod or a measuring lead with an alligator clip as an option and connect it to the part to be measured.

  • Page 72: Measurement Of Circuits

    6.2.4 Measurement of circuits The circuit is a combination of plural parts. Insulation resistance is measured outside of circuits such as between circuits that are mutually insulated and between a circuit and casing. The measuring method and handling of this meter are the same as those used in measurement of insulation resistance of parts.

  • Page 73: Measurement By Electrode For Surface Resistance Measurement

    6.3.2 Measurement by electrode for surface resistance measurement This electrode is used as a measuring terminal by pressing it onto a surface of the sample. It can be used simply when a sample is relatively soft. Strictly speaking, this electrode does not separate volume resistivity strictly. However, in general, surface resistance is lower and can be measured in practice.
  • Page 74 Volume resistance and surface resistance measured and multiplied by an electrode constant are called volume resistivity (ρ ) and surface resistivity (ρ ), respectively. Π · D1 Measured value Volume resistivity ρ ＝ × where ρ : volume resistivity in [Ω·cm] Π...

  • Page 75: Use Of Shielding Box

    Samples need be placed in a shielding box when measuring samples of high insulation resistance. (1) Connection An example of connection when a shielding box is used is illustrated in Fig. 6.5. The diagram shows an example of connection between CH1 equipment and the DSM-8542.
  • Page 76 Fig. 6.5 Example of shielding box connection [Warning] Maximum 1000V of measuring voltage is output between the “GROUND”” terminal and “GUARD” terminal or the “OUTPUT” terminal depending on the connecting method of the short bar. Be sure to connect the outer casing of the shielding box to the “GROUND” terminal.

  • Page 77: Measuring Liquid Sample

    (1) Connection A sketch of liquid sample electrodes and a connection example of them are illustrated in Fig. 6.7. The diagram shows an example of connection between CH1 equipment and the DSM-8542. Fig. 6.7 Connection Example of Liquid Sample Electrodes...
  • Page 78 (2) Electrode constant setting To set resistance values that are not affected by the electrode shape, set in this meter the electrode constants used in measurement and measure resistance as volume resistivity of a liquid sample. [Note] Refer to the instruction manual of the liquid sample electrode for more information about electrode constants.

  • Page 79: Current Measurement

    Setting Screen [ELEC] Measured Setting planar [ENTER] value display Planar sample sample electrode screen measuring mode (D1,D2,t) [SIZE] [ACTL] Setting liquid [ENTER] sample electrode Fig. 6.9 Concept of Electrode Constant Setting Current Measurement Set the measuring mode to “Current Measurement” referring to 5.2.2 “Setting measuring mode”...

  • Page 80: Ending Measurement

    Ending Measurement Press the [STOP] key when finishing measurement. Pressing the [STOP] key lights up the [STOP] lamp beside the key. Trigger input will be prohibited. When the dedicated power supply unit PSU-8541 is connected, the measuring voltage output will become “0V” in a [STOP] condition. The circuit between the “OUTPUT”...

  • Page 81: Contact Check

    (1) Setting automatic voltage check Press [SHIFT] [F3] V.CK on the setting screen referring to 4.5 “Display Screen” 5.2.1 “Screen types.” Select on the screen whether to (execute · not execute) monitoring of the measuring voltage automatically. Selection made for voltage checks will be indicated by a side mark. The side mark will flash in case the result of a voltage check is not acceptable.
  • Page 82 [Notice] Be certain to set an open correction value when using the contact check function. Otherwise errors will result. A side mark (“◄”) will be lit in the “OPEN SET” window in the lower left of the front panel when open correction is executed once. [Notice] When an external power source other than the dedicated power supply unit is connected or when the contact check function is used, be sure to impress...

  • Page 83: Gp-Ib Interface

    7. GP-IB Interface Overview The DSM-8542 is equipped with a GP-IB interface as a communication function among its standard provisions. This interface allows remote control and transfer of data by a GP-IB controller. See 5.2.16 “Setting interface conditions” for setting of GP-IB addresses.

  • Page 84: Talker Function

    Talker Function Output data format The output format of measured data can be selected from the following four types by the “DFM” command. (1) Basic format Data for channels that are set up will be sequentially returned. Measured data for each channel will be delimited by data separators. ｄ...
  • Page 85 ① Channel No. Channel Nos. will bee set in numerics of one byte of 1 to 4. ② Measured value Measured values will be set in an 11-byte exponential format. ±ｄ ． ｄ ｄ ｄ ｄ Ｅ ±ｄ ｄ d: numeral Output data in overrange will set “0s”...

  • Page 86: Response To Query Program Message

    ① Comparison result The details are the same as those for the basic format. ② Delimiter The details are the same as those for the basic format. (4) No data return Specifying this format will return data as a trigger response. This format is used for storing data in the data buffer temporarily and reading it in batch.

  • Page 87: Listener Function

    <EOI> [Note] A default will result when the power is turned on. Listener Function The DSM-8542 accepts program messages in ASCII character strings. In this manual, program messages are also described generically as “commands” or “command messages.” Program messages are classified as follows.

  • Page 88: Device Clear Function

    ③ Plural data groups separated by data separators. ④ Plural data groups separated by message separators. ① Ｘ Ｘ Ｘ <Delimiter> ② Ｘ Ｘ Ｘ ｄ ｄ ｄ ｄ ｄ ｄ <Delimiter> ③ Ｘ Ｘ Ｘ ｄ ｄ ｄ ， ｄ ｄ ｄ ， ｄ ｄ ｄ ， ｄ ｄ ｄ <Delimiter> ④...
  • Page 89 Syntax Chart Fig. 7.1 Message Syntax Chart...
  • Page 90 Command program header Fig. 7.2 Program Header Syntax Chart...
  • Page 91 Fig. 7.3 Syntax Chart of Data Part...

  • Page 92: Program Messages

    Program Messages 7.9.1 List of program messages Table 7.3 Setting Control Program Messages 1/13 Mnemonic Description Format Delimiter designation in talker mode [Format] d1 (Delimiter designation: 0 ~ 2) DLM d1 0: L <EOI> Default d1: NR1 format 1: C <EOI>...
  • Page 93 Table 7.3 Setting Control Program Messages 2/13 Mnemonic Description Format Current·CH setting Format] CCH d1 d1: NR1 format CCH？ Query response of current·CH is same as [Format] setting. CCH? [Response] High-speed measuring mode setting [Format] d1 (Measured value display: 0 ~ 1) FMS d1, d2, d3, d4 0: OFF d1: NR1 format...
  • Page 94 Table 7.3 Setting Control Program Messages 3/13 Mnemonic Description Format Averaging setting [Format] d1 (Selection: 0 ~ 1) AVE d1 0: OFF (Not done) d1: NR1 format 1: ON (Done) AVE? Query response in averaging is same as setting. [Format] AVE? [Response] Setting number of effective columns for...
  • Page 95 Table 7.3 Setting Control Program Messages 4/13 Mnemonic Description Format Trigger mode setting [Format] d1 (Mode: 0 ~ 2) TGM d1 0: Internal trigger d1: NR1 format 1: Manual trigger 2: External trigger TGM? Query response of trigger mode is same as [Format] setting.
  • Page 96 Table 7.3 Setting Control Program Messages 5/13 Mnemonic Description Format Electrode data setting Format] d1 (SIZE/ACTL selection) ELC d1 d2 d3 d4 d5 (0: ACTUAL, 1:SIZE) d1: NR1 format d2: NR2 format d2 (Electrode inside diameter SIZE) (0.0 ~ 999.9mm) d3: NR2 format d3 (Electrode outside diameter SIZE) d4: NR2 format...
  • Page 97 Table 7.3 Setting Control Program Messages 6/13 Mnemonic Description Format Sequential mode setting [Format] d1 (Mode: 0 ~ 1) SEQ d1 0: OFF 1: ON d2, d3, d4, d5, d6 d2 (Program No.: 0 ~ 9) d1: NR1 format No. of program executed when sequential mode d2: NR1 format is turned ON d3: NR2 format...
  • Page 98 Table 7.3 Setting Control Program Messages 7/13 Mnemonic Description Format Comparison Measuring mode setting [Format] d1 (Comparison execute: 0 ~ 1) 0: OFF 1: ON d1: NR1 format d2 (Mode: 0 ~ 2) d2: NR1 format 0: HI 1: IN 2: LO d3: NR3 format d3 (Upper-limit comparison value)
  • Page 99 Table 7.3 Setting Control Program Messages 8/13 Mnemonic Description Format Measuring power source setting [Format] d1 (Channels to use Measuring Power Supply A: PWS d1, d2, d3, d4, d5 0 ~ 15) d1: NR1 format d2 (Channels to use Measuring Power Supply B: d2: NR1 format 0 ~ 15) d3: NR1 format...
  • Page 100 Table 7.3 Setting Control Program Messages 9/13 Mnemonic Description Format Setting Measuring Voltage System A [Format] d1 (Voltage: 0.1 ~ 1000.0V) PWA d1 d1: NR2 format PWA? Query response of Measuring Voltage System A [Format] is same as setting. PWA? [Response] Setting Measuring Voltage System A [Format]...
  • Page 101 Table 7.3 Setting Control Program Messages 10/13 Mnemonic Description Format Function to interact with measuring voltage ON [Format] or measurement start [START] key. Function to interact with measuring stop [Format] (measuring voltage OFF) [STOP] key. Generates manual trigger. [Format] Enabled when trigger mode is manual. VCK? Executes voltage check once and returns result [Format]...
  • Page 102 Table 7.3 Setting Control Program Messages 11/13 Mnemonic Description Format RHS? Histogram counter readout [Format] Returns count values of bar graphs divided into RHS? ten and displayed on the screen as responses. [Response] d1 to d2 are output in order of large threshold. d1 ~ d10: NR1 format Histogram counter clear [Format]...
  • Page 103 (Environmental data No.: 0 ~9) *RCL d1 d1: NR1 format *IDN? Equipment ID query [Format] Returns equipment IDs of DSM as responses. *IDN? d1 (HIOKI, DSM8542, 0,01.00) [Response] d1: Character string *CAL? Self-calibration (current range calibration) [Format] execute *CAL?
  • Page 104 Table 7.3 Setting Control Program Messages 13/13 Mnemonic Description Format *CLS Status register clear [Format] See Fig. 7.4. *CLS *SPE Sets the service request enable register. [Format] d1 (0 ~ 255) *SRE d1 See Fig. 7.5 and Table 7.5. d1: NR1 format *SPE? Query of data in the service request enable [Format]...

  • Page 105: Precautions For Listener Specification

    Plural command messages can be transferred once by linking them using message separators. The input buffer size of the DSM-8542 is 128 bytes and message character strings exceeding 127 characters cannot be accepted. When this limit is exceeded, the entire command will be ignored (skipped) and the MLE (Message Length Error) bit of the error register will be set.

  • Page 106: Status Byte And Events

    7.11 Status Byte and Events The DSM-8542 interacts with the service request function and can request services to the active controller in various event statuses. The status byte, which is the core of the service request function, is briefly explained below.

  • Page 107: Status Data

    7.12 Status Data Standard Event Standard Register ＆ Logical ＆ ＆ ＆ ＆ ＆ ＆ ＆ Standard Event Standard Enable Register Device Event Status Register ＆ Logical ＆ ＆ ＆ ＆ ＆ ＆ ＆ Device Event Status Enable Register Queue is not empty Output Queue Status Byte Service Rquest...

  • Page 108: Status Byte Register

    7.13 Status Byte Register The Status Byte register is the core of the service request function and all status information and event information is concentrated in this register. The following messages relate to the Status Byte register. *CLS Clears the following registers: ·...
  • Page 109 Table 7.5 Status Byte Register Bit No. and Name Event/status indicated when bit is true bit7: ERR Irrecoverable error has occurred EEPROM data is destroyed. Writing in EEPROM has failed. RAM read/write error. Current range calibration failure. A/D converter calibration failure Internal communication error.

  • Page 110: Using Program Message

    7.14 Using Program Message This section describes program messages that require caution when using them and programming hits. Program messages are generically called commands in this section. (1) DFM command (Output data format setting) If not set, data will be output in the basic default format. Data volume can be reduced if only measured values or only comparison results are designated as necessary, thus enabling a reduction of communication time slightly.
  • Page 111 (9) RDT? command (Most recent data read) This command is mainly used in reading measured data during measurement in the Internal Trigger mode. No need to use this command in the other trigger modes or in the sequential measurement mode. (10) *STB? command (Status byte register read) This command is a query command and cannot be used in detection of measurement end and other states.
  • Page 112 [Notes] 1. Caution for output queue readout When reading data from the output queue, the DSM-8542 adds a delimiter to each data group and all data cannot be read in one readout. For this reason, the MAV bit is used to check data presence and process data readout for the required number of readout cycles using the MAV bit.

  • Page 113: Standard Event Status Register

    7.15 Standard Event Status Register After mask processing by the Standard Event Status Enable register, messages are concentrated in the ESB bits of the Status Byte register. The following is messaged related to the Standard Event Status register. *CLS Clears the following registers: ·...
  • Page 114 Table 7.6 Standard Event Status Register Bit No. and Name Event/status indicated when bit is true bit7: PON Power ON. Read first after turning the power on. bit6: URQ Not used bit5: CME Command error Errors were detected in received messages. Specifically, they are grouped in the bits MLE, HDE and DFE of the Error register in the following cases.

  • Page 115: Error Register

    7.16 Error Register The Error register controls error information and is an 8-bit register. The data of this register is grouped in the CME, EXE, DDE and QYE bits of the Standard Event Status register. (Mask processing is not performed) The following messages relate to the Error register.
  • Page 116 Table 7.7 Error Register Bit No. and Name Event/status indicated when bit is true bit7: Not used bit6: MLE Message length error Set when the length of a message exceeds a permissible range. Reset by reading this register. bit5: HDE Message header error Set when a message header that cannot be recognized is received.

  • Page 117: Device Event Status Register

    7.17 Device Event Status Register This register controls events and statuses unique to DSM. The data of this register is grouped in the DSB bits of the Status Byte register after mask processing by the Device Event Status Enable register. The following messages relate to the Device Event Status register.
  • Page 118 Table 7.8 Device Event Status Register Bit No. and Name Event/status indicated when bit is true bit7: Not used bit6: Not used bir5: BOV Measured data buffer overflow Set when data is lost due to overflow of the measured data buffer. Reset by reading this register.

  • Page 119: Initialization Value By *Rst Message

    HIOKI factory are shown below. “---“ in initialization values by *RST shown in the following table are the parts that do not affect the settings. Table 7.10 Settings in Preshipment Inspection at HIOKI Factory and Initialization values by *RST Message. Item GP-IB...
  • Page 120 Item GP-IB Settings in Initialization values by Message Preshipment *RST Inspection ---- Histogram counter RHS? Clear state ---- Histogram thresholds All “0s” ---- Data buffer RBF? Not fixed Electrode coefficients ---- D1(IN DIAMETER) [ 50.0 ]mm ---- D2(OUT DIAMETER) [ 70.0 ]mm ---- t (THICKNESS) [ 0.1...

  • Page 121: Interface

    When changing the interface, temporarily reset to the local mode or turn the power supply on again. Connecting Control Signals and Flow Control The flow of data transmission and reception is controlled in the DSM-8542 by controlling the RTS signal. Control the controller in the Terminal mode by connecting as follows.

  • Page 122: Transmission Data Specification

    [Notice] DSM-8542 requires flow control by the RTS and CTS. Make sure to wire RTS and CTS. Please note that flow control cannot be performed even if the RTS and CTS are short-circuited Transmission Data Specification The data format is the same as that of the talker function in GP-IB.

  • Page 123: Reception Data Specification

    Format Remote changeover [Format] request When controlling by the RS-232 interface, the DSM-8542 changes to a remote state when the RMT command is received, allowing control by RS-232. In the beginning, send this command. Press the [LOCAL] key to reset to a local state from a remote state.

  • Page 124: External Interfaces

    Output /EOM Output /INDEX Output /SRT.E Output /VON Output /ERROR Output [Cautions] 1. Connector on DSM-8542: Product No. 57LE-40360 manufactured by DDK 2. Pin Nos. in the table without signal name are reserved. Do not connect other external signal lines.

  • Page 125: Signal Functions

    9.1.2 Signal functions (1) Input signals INCOM: The common terminal for input signals. Isolated from the common terminal for output signals. /TRIGGER: An external trigger input signal. Connected to “EXT TRIGGER” input on the rear panel. /INTERLOCK: An interlock input signal. Connected to “INTERLOCK”...
  • Page 126 (2) Output signals OUTCOM: The common terminal for output signals. Isolated from the common terminal for input signals. /V.CHECK GO: Output for “acceptable/non-acceptable” decision in voltage check. (A)(B) Output becomes active when decision is “acceptable.” /C.CHECK GO: Output for “acceptable/non-acceptable” decision in contact check. (1)~(4) Output becomes active when decision is “acceptable.”...

  • Page 127: Electrical Characteristics Of Signals

    9.1.3 Electrical characteristics of signals (1) Signal logic level All input and output signals are negative logic (active low). (2) Handler output signal The output signal is photocoupler output of the open collector. The handler must be connected to the power source and pull-up resistance. The common terminal of the output signals is DC-isolated from the internal circuit.
  • Page 128 (3) Handler input signal The input signals are output by the cathode of an LED in the photocoupler through a current limiting resistance. The anode side of the LED is connected to the 5V power source inside. Output the handler output by an open collector or TTL output. The common terminal of the input signals is DC-isolated from the internal circuit.

  • Page 129: External Trigger Terminal

    External Trigger Terminal The “EXT TRIGGER” connector on the rear. This terminal is used as trigger input when the trigger mode is set to External Trigger mode. 9.2.1 Connector Use a BNC connector. 9.2.2 Electrical characteristics The trigger signals are output by the cathode of an LED in the photocoupler through a current limiting resistance.

  • Page 130: Interlock Terminal

    Interlock Terminal The “INTERLOCK” connector on the rear. Detecting open or closed state of the fixture lid, this terminal prohibits output of measuring voltage while the lid is open to safeguard operator safety. When using the interlock function, set the interlock function to a “Use” state on the Setup screen.

  • Page 131: Signal Timing

    Signal Timing (1) Voltage output /START /STOP /VON Measuring voltage being output (2) Regular measurement (Internal trigger mode) /INDEX /EOM /V.CHECK GO /C.CHECK GO /COMP GO (3) Regular measurement (Sequence off, External Trigger mode) /TRIGGER /INDEX /EOM /V.CHECK GO /C.CHECK GO /COMP GO (4) Open correction /OPEN...
  • Page 132 (5) Execution of voltage check only /V.CHECK /INDEX /EOM /V.CHECK GO (6) Execution of contact check only /C.CHECK /INDEX /EOM /C.CHECK GO (7) Sequential measurement /START /VON /INDEX /EOM PROGRAM Discharge Charge Measurement Discharge /V.CHECK GO /C.CHECK GO /COMP GO...

  • Page 133: Psu-8541 Connectors

    “V.CONTROLE” is for power control signals (product No. RDAD-15S-LNA manufactured by Hirose Electric) and “VOLTAGE INPUT” is a voltage input connector manufactured to HIOKI’s special specification. · Pin assignment of the “VOLTAGE INPUT” connector on the DSM-8542 side 1 CH-1(+) 7 NC 6 CH-3,4(-)

  • Page 134: Maintenance

    Periodical checks and calibrations are recommended to ensure reliability of test data of the meter and to prevent accidents. HIOKI E. E. Corporation is on hand to make checks, repairs and calibrations of your meter. 10.1 Periodical Checks for Maintenance (1) Visually check external damage such as on measuring terminals and panels.

  • Page 135: Self-Calibration Function

    (1) Set the meter as follows. ● Integral time (SAMPL) 300ms ● Trigger mode (TRIG) Internal (INT) ● Averaging (AVE) ● Self-calibration (CALIBRATION) Auto execute (AUTO MODE: ON) (INTERVAL) 60s ● Measuring voltage (MES. V) ● Measuring mode (MODE) Current measurement (2) Connect reference resistance of 100kΩ...

  • Page 136: Self-Diagnosis Function

    “- MAN.T” key sometimes resets meter operation to a normal operation condition in about 60s. Switching the power on again may return it to normal, but if an error persists, please contact the nearest HIOKI office for repair.

  • Page 137: Service Organization Of Hioki

    10.5 Service Organization of HIOKI Please call HIOKI by dialing the toll-free-call telephone No. or the Services Section of HIOKI. 10.6 Storage and Moving (1) Storage When the meter is not intended to be used for a long time, disconnect the power plug and store the meter in a place free of a corrosive gas and vibration at an ambient temperature between -5 and 45°C and less than 85% RH covering it with...

  • Page 138: Product Full View

    11. Product Full View...

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