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F.W. Bell 7030 Instruction Manual

Gauss/tesla meter
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7030 GAUSS/TESLA METER
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Summary of Contents for F.W. Bell 7030

  • Page 1 7030 GAUSS/TESLA METER Instruction Manual...
  • Page 2 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual THIS SIDE BLANK ! (Inside of Front Cover)
  • Page 3 MODEL 7030 GAUSS / TESLA METER Instruction Manual Manual UN-01-251 Item 359936 Rev. E, ECO 14211 All Rights Reserved.
  • Page 4 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual This symbol appears on the instrument and probe. It refers the operator to additional information contained in this instruction manual, also identified by the same symbol. NOTICE: See Pages 4-1, 4-2, and 4-3...

  • Page 5: Table Of Contents

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Table of Contents Section – 1 Introduction Overview…………………………………………………………………………………….……….. General Description…………………………………………………………………………………. Applications…………………………………………………………………………………..…….… Section – 2 Specifications Instrument…………………………………………………………………………………………….. Calibration Service…………………………………………………………………………………… Zero Flux Chamber………………………………………………………………………………….. Section – 3 Probes Overview………………………………………………………………………………………...……. Probe Variations………………………………………………………………………………….…. Probe Memory……………………………………………………………………………………...… Probe Stem…………………………………………………………………………………..………..
  • Page 6 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Section – 6 Flux Density Measurement Overview…………………………………………………………………………………………… Measurement Units and Selection……………………………………………………………… Present Flux Density Reading……………………………………………………..…….……… Measurement Mode Indicator…………………………………………………………………… Range Selection………………………………….……………………………………………… ac or dc Measurement Selection………………………………………………………………. ac Mode Operation……………………………………………………………………………… ac Mode Analog Filtering…………………………………………………………………………...
  • Page 7 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual 7-27 SCPI Commands – Unit Commands………………………………………………………… 7-28 SCPI Commands – Range Commands…………………………………………………….…… 7-29 SCPI Commands – Filter Commands…………………………………………………………… 7-30 SCPI Commands – Averaging Commands…………………………………………………… 7-30 SCPI Commands – Classifier (Limit) Commands……………………………………………… 7-32 SCPI Commands –...
  • Page 8 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual List of Illustrations Front Panel……………………………………………………………………….. Figure 1-1 Rear Panel…………………………………………………………………….….. Figure 1-2 Various Positions of Instrument………………………………………………… Figure 1-3 Figure 2-1 Frequency Response of Uncorrected Analog Outputs (%Deviation)………. Figure 2-2 Digital I/O Connector……….……………………………………………………. Figure 2-3 Zero Flux Chamber……………………………………………………………….

  • Page 9: Section - 1 Introduction

    Table 1-1 on the following page provides a list of features. A detailed description of the 7030’s functions and features is provided in the remaining sections. F.W. BELL 7030 GAUSS/TESLA METER...

  • Page 10: Table 1-1 Model 7030 Gauss/Tesla Meter List Of Features

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Table 1-1 Model 7030 gauss/tesla meter List of Features Flux Density Auto Range and Zeroing Capability Measurement dc and ac Field Measurement up to 50 kHz Automatic Calibration Units in gauss (G), tesla (T), amp/meter (A/m), or oersted (Oe)

  • Page 11: General Description

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual GENERAL The Model 7030 gauss/tesla meter is a three channel bench-top instrument that utilizes Hall effect probes to measure magnetic flux DESCRIPTION density in units of gauss (G), tesla (T), amp/meter (A/m), or oersted (Oe).
  • Page 12 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Zero GENERAL DESCRIPTION The “zero” function allows the user to remove undesirable readings (Continued) from nearby magnetic fields (including earth’s) as well as to remove initial electrical offsets in the probe and instrument.
  • Page 13 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual A separate BNC connector, labeled “Vector Summation”, provides a GENERAL corrected output signal that is proportional to the resultant magnitude DESCRIPTION of the three channels vector sum. (Continued) Standard full scale output ranges are 3V, 10V, 3V , and 10V RMS.

  • Page 14: Table 1-2 Front Panel Description

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual GENERAL Front Panel DESCRIPTION The front panel consists of the ¼ VGA display, keypad, probe (Continued) connectors, and power switch. TABLE 1-2 FRONT PANEL DESCRIPTION 320 x 240 Pixel Electro-luminescent ¼ VGA display, Multi-Shade Amber Color...

  • Page 15: Table 1-3 Rear Panel Description

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Rear Panel GENERAL DESCRIPTION The rear panel consists of the power receptacle, fuse holder, line (Continued) voltage switch, analog signal outputs, communication ports, and the cooling fan vent. TABLE 1-3 REAR PANEL DESCRIPTION...

  • Page 16: Applications

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Cabinet GENERAL DESCRIPTION The cabinet is equipped with a rotating handle that also serves to (Continued) adjust the tilt angle of the instrument. If necessary, the handle is easily removed with a standard Phillips screwdriver. The rear of the housing features protruding feet that allow the instrument to be placed down in a vertical position, without damage to the rear panel.

  • Page 17: Section - 2 Specifications

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Section 2 Specifications INSTRUMENT Full-scale ranges are shown in the Tables 2-1a – 2-1c below; listed by probe type. In all cases, the resolution is 1 part in 300,000. Table 2-1a: Ranges for Low Field Probe:...
  • Page 18 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Table 2-2 Accuracies @23°C ( Instrument Only *) Display and Digital Corrected Analog Output and Uncorrected Analog Digital Outputs (max speed) Output Outputs (min speed) 3V range: 0.25% of ±0.05% of reading and reading ±40mV...
  • Page 19 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Min / Max Hold Acquisition Time: Analog Output Impedance: <100 Ohms dc Mode: 200mS ac Mode: 200mS Analog Output Connector: Peak / Valley Hold Acquisition Time: Standard BNC dc Mode: Analog Output Scaling: ac Mode: 200µs...
  • Page 20 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Figure 2-1 Frequency Response of Uncorrected Analog Outputs (Typical) No Probe (Instrument Only) 5.00 0.00 1000 10000 100000 -5.00 -10.00 -15.00 -20.00 -25.00 -30.00 -35.00 FREQUENCY (Hz) Section 2 - Specifications...

  • Page 21: Figure 2-2 Digital I/O Connector

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Communications EMC application note Use only high quality, double shielded cables for the RS-232, IEEE-488 and Digital I/O connections. Keep the length of the cables less than 3 meters. Cables greater than 3 meters with insufficient EMI shielding can cause excessive emissions or may be susceptible to external interference.

  • Page 22: Calibration Service

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Regulatory Information: Compliance was demonstrated to the following specifications as listed in the official Journal of the European Communities: EN 50082-1:1997 Generic Immunity EN 61000-4-2 Electrostatic Discharge (ESD) Immunity EN 61000-4-3 and...

  • Page 23: Zero Flux Chamber

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual ZERO FLUX CHAMBER Model Number: YA-111 Cavity Dimensions: Length: 50.8 mm (2”) Diameter: 8.7 mm (0.343”) Attenuation: 80 dB to 30 mT (300 G) Purpose: Figure 2- 3 To shield the probe from external magnetic fields Zero Flux Chamber during the ZERO or RELATIVE operations.
  • Page 25 THIS SIDE BLANK ! (Rear of page 2-7)

  • Page 27: Section - 3 Probes

    Section 3 Probes OVERVIEW F.W. Bell’s 7000 series gauss/tesla meter probes are designed to meet the electrical and mechanical requirements of virtually any application. Models are available for transverse, axial, 3-axis and very low field measurements. The probe style is dependent upon the measurement environment.

  • Page 28: Probe Variations

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual PROBE A wide variety of probes are available for use with the 7030 gauss/tesla meters. The types include 3-axis, heavy-duty transverse and axial, standard transverse VARIATIONS and axial, standard transverse with exposed element, flexible transverse and axial with exposed element and low field probes.

  • Page 29: Probe Memory

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual PROBE The connector of each probe contains a memory device which stores registration information (model number, serial number, date calibrated, etc.) MEMORY as well as performance information for Hall generator sensitivity, linearity, frequency response and temperature response.

  • Page 30: Figure 3-2 Hall Probe Configurations

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Figure 3-2 Hall Probe Configurations Section 3 - Probes...

  • Page 31: Section - 4 Setup

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Section 4 Setup SAFETY INSTRUCTIONS GENERAL: For safe and correct use of this instrument it is necessary that both operating and servicing personnel follow generally accepted safety procedures plus the safety cautions and warnings specified.

  • Page 32: Figure 4-1 Probe Electrical Warning

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SAFETY INSTRUCTIONS WARNING: (Continued) The Hall probe is a non-contact measuring device. The probe is not to contact a surface which exceeds a voltage of 30Vrms (42.4V peak) or 60V d.c. Figure 4-1 Probe Electrical Warning...

  • Page 33: Line Voltage Settings / Fuse Panel

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual WARNING! READ THIS CAREFULLY The model 7030 gauss/tesla meter has been factory-configured to operate on a line voltage of 120 Vac. See the following heading LINE VOLTAGE SETTINGS / FUSE PANEL if operation at 100, 220, or 240 Vac is required.

  • Page 34: Adjusting The Handle

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual See figure 4-2c. Reverse the positions of the holders and reinstall, making sure the “→” points to the right. Rotate the voltage selector drum to read “220 or 240 (your countries nominal mains voltage) Vac”...

  • Page 35: Probe Installation

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual PROBE See Figure 4-4 INSTALLATION / Install the probe connector so that the molded key in the connector body REMOVAL lines up with a similar key-way in the receptacle on the front panel. Push the connector in until it will travel no further.

  • Page 36: Power Up

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual POWER - UP Locate the power switch on the front panel. The On/Off positions are labeled below the switch and are shown in Figure 4-5. To turn on the instrument press the switch and release. The switch will remain depressed and the boot up procedure will begin.

  • Page 37: Figure 4-6 Boot Up Screen

    POWER – UP (Continued) During Boot up, the F.W. BELL logo will appear and a status bar indicates boot up progress. See Figure 4-6. Internal diagnostics are performed first, followed by the initial formatting of the display. The number of channels initially displayed will depend on the display settings when the instrument was last turned off.
  • Page 38 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual This Page Intentionally Blank Section 4 - Setup...

  • Page 39: Section - 5 User Interface

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Section 5 User Interface Most of the features and functions of the 7030 are activated directly from OVERVIEW the front panel keypad. Each channel has its own dedicated set of keys for commonly used functions. Other functions are accessed through the menu system.

  • Page 40: Front Panel Keypad

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual FRONT PANEL There are four sets of keys on the 7030 front panel. One set is associated with the menu system. This set contains the MENU, ENTER, and KEYPAD DIRECTIONAL keys. The remaining three sets of keys are identical to one another in appearance and functionality with one set being associated with each channel.

  • Page 41: Menu System

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual MENU SYSTEM The menu system of the 7030 is very intuitive to use. It features many items that are similar to those found in the operating systems of personal computers. These items include the “pointer”, “buttons”, “checkboxes”, “selections”, and simple text.

  • Page 42: Figure 5-3 Using Selections

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Selections MENU SYSTEM (Continued) “Selections” contain the possible choices for a function. For example, the possible settings for an analog filter are ”Auto”, “500 Hz”, “5kHz”, and “50kHz.” If the current setting is “500Hz”, positioning the “pointer” over the “selection”...

  • Page 43: Using The Mouse

    Note: The front panel keypad remains active at all times. The 7030 can be completely operated from the mouse. Pressing the right mouse button is the same as pressing the MENU key on the front panel.

  • Page 44: Help System

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual HELP SYSTEM The 7030 features a comprehensive help system. Each sub-menu has a help screen that can be accessed by “pressing” the “?” “button” in the upper right corner of the screen. These help screens contain information about the functions of the sub-menu from which the help screen was accessed.

  • Page 45: Setup Save-Load

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SETUP Four (4) configuration setups may be saved in flash memory. These setups may be recalled at anytime, including after the instrument SAVE-LOAD been shut off. All settings from all menus are saved including those enabled from the front panel keypad.

  • Page 46: Table 5-1 Default Configuration Settings

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Table 5-1 Default Configuration Settings Menu Item Setting Scope Maximum Enabled All Channels and Vector Summation HOLD Minimum Enabled All Channels and Vector Summation Peak Enabled All Channels Valley Enabled All Channels...

  • Page 47: Display Format

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual DISPLAY FORMAT The instrument will automatically format the screen for the best possible view based on the number of channels active and parameters enabled. It is possible to have all three channels and the vector summation active at the same time.
  • Page 48 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Changing the Display Orientation (Horizontal / Vertical) DISPLAY FORMAT (Continued) The display orientation may be changed from the menu system or from the front panel keypad. Note: When only one channel is displayed, there is no difference between the horizontal and vertical Setting.

  • Page 49: Setting The Date And Time

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SETTING THE The date and time is set and enabled from the display menu. When enabled, the date and time is displayed at the bottom of the measurement DATE AND TIME screen.
  • Page 50 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual This Page Intentionally Blank 5-12 Section 5 – User Interface...

  • Page 51: Section - 6 Flux Density Measurement

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Section 6 Flux Density Measurement OVERVIEW This section describes field measurement operations for the model 7030 gauss/tesla meter. Each of the instrument’s functions and features relating to field measurement is described in detail.

  • Page 52: Table 6-1 Available Units

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Units of measurement are set for the entire instrument, i.e. it is not possible for MEASUREMENT one channel to have different units than another. The measurement units UNITS selected are displayed at the bottom of the measurement screen. Table 6-1 lists the available units for each parameter.

  • Page 53: Present Flux Density Reading

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual PRESENT FLUX The flux density reading contains five or six digits of information and includes the decimal point, polarity information, and the units of DENSITY READING measurement; see Figure 6-1. The number of digits depends on the update interval setting.

  • Page 54: Range Selection

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual RANGE The instrument is capable of providing flux density measurements on one of four fixed ranges, or it can be programmed to automatically select the best SELECTION range for the present flux density being measured. The available ranges are listed in Section 2 –...

  • Page 55: Ac Or Dc Measurement Selection

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual To Switch Between ac or dc Mode AC OR DC MEASUREMENT The instrument is capable of measuring either static (dc) or alternating (ac) SELECTION magnetic fields. To choose the desired mode, press the AC/DC key. The “measurement mode indicator”...

  • Page 56: Table 6-2 Minimum Magnitudes For Rated Ac Accuracy

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Frequency Compensation in ac Mode AC MODE OPERATION To obtain accurate ac measurements using frequency compensation, the (Continued) ac field must have a frequency greater than 10 Hz, and depending on the selected range, a minimum magnitude according to Table 6-2.

  • Page 57: Ac Mode Analog Filtering

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual AC MODE A low pass filter is available for each channel that may be set to pass frequencies only below 50kHz, 5kHz or 500 Hz. The instrument can ANALOG automatically select the best filter setting based on the current flux density FILTERING being measured.

  • Page 58: Zeroing

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual ZEROING Overview “Zeroing” the probe and instrument is one of the most important steps to obtaining accurate flux density measurements. An ideal Hall effect sensor produces zero output in the absence of a magnetic field, but actual devices are subject to variations in materials, construction and temperature.
  • Page 59 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual dc Zeroing ZEROING (Continued) For most situations it is preferable to shield the probe from all external magnetic fields prior to zeroing. Provided with the instrument is a “zero flux chamber” which is capable of shielding against fields as high as 30 mT (300 G or 23.88 kA/m).

  • Page 60: Update Interval

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual ZEROING Manual Zero Offset for dc Mode Operation (Continued) This feature also allows the user to manually set the zero point to a value other than zero or to make a fine adjustment to the zero point after performing a zeroing operation.

  • Page 61: Hold Function

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual HOLD In some applications it may be desirable to “hold” a reading that is either greater than (MAX hold) or less than (MIN hold) all previous readings. Also, FUNCTION it may be necessary to capture the high (PEAK hold) and low (VALLEY hold) extremes of rapidly changing pulses.
  • Page 62 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual HOLD Hold Mode Configuration FUNCTION The hold functions are setup for use from the hold menu and are then (Continued) activated and reset from the front panel. Each channel may be configured to display any of the various hold functions.

  • Page 63: Relative Mode

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual RELATIVE MODE The relative mode allows a specific flux density value to be subtracted from all future readings. Thus all future readings will be “relative” to that value. For instance if the relative value is +100.0 gauss, and the present flux density is +112.0 gauss, the actual displayed value will be...

  • Page 64: Figure 6-5 Relative Value Indicator

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual RELATIVE MODE Relative Mode – Front Panel (Continued) In the automatic mode, the present flux density as seen by the probe is used as the relative value. To use the present flux density as the relative value for a single channel: 1) Select ac or dc mode.
  • Page 65 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual RELATIVE MODE Relative Mode – Menu System (Continued) In some cases you may wish to set a pre-determined relative value. The relative value can be set precisely from the menu system. To set a pre-determined relative value from the menu system: 1) Select ac or dc mode for all channels.

  • Page 66: Vector Summation

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual VECTOR In addition to the three standard channels, the vector summation is dedicated to vector measurements. The resultant magnitude of the three SUMMATION channels’ vector sum and relative vector angles are calculated and displayed.
  • Page 67 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Vector Magnitude VECTOR SUMMATION The vector magnitude is calculated using the pythagorean theorem for an (Continued) orthogonal cartesian co-ordinate system, mathematically: Where X, Y and Z, are the readings from channels 1, 2, and 3. R is the resultant vector magnitude.
  • Page 68 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Activating and De-activating Vector Summation VECTOR SUMMATION Vector summation may be activated / de-activated either through the menu (Continued) system or through the front panel keypad. To activate / de-activate vector summation from the menu system: 1) From the main menu, choose DISPLAY.

  • Page 69: Analog Outputs

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual ANALOG Each channel provides a corrected and uncorrected analog output voltage signal available from standard BNC connectors. The uncorrected output OUTPUTS signal is representative of the magnetic flux density as measured by the Hall probe.
  • Page 70 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Using the Vector Summation Analog Output ANALOG OUTPUTS Full scale for the vector summation output will correspond to the full scale (Continued) range of the channel with the highest range setting. For example, if the range for channels 1 and 2 are set to 30 gauss, and channel 3 is set to 300 gauss;...

  • Page 71: Classifiers

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual CLASSIFIERS The classifier function allows a lower and upper limit of flux density to be defined that can be quickly used to determine the status of a magnetic field. The instrument will indicate visually whether the field is above, within, or below these limits.
  • Page 72 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Example Circuit for Classifier Outputs CLASSIFIERS (Continued) Figure 6-7 shows an example circuit for using the classifier outputs. These outputs are in the form of general purpose switch closures available from the 15 pin “D” type connector located on the rear panel of the instrument.

  • Page 73: Sources Of Measurement Errors

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SOURCES OF When making flux density measurements there are several conditions that can introduce errors: MEASUREMENT ERROR 1) Failure to zero the error signals from the instrument, probe, and nearby sources of magnetic interference.

  • Page 74: Figure 6-9 Probe Output Versus Distance

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual 4) As shown in Figure 6-9 as the distance between the magnetic SOURCES OF source and the Hall probe increases fewer flux lines will pass MEASUREMENT through the probe, causing the probe’s output to decrease.

  • Page 75: Section - 7 Remote Operation

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Section 7 Remote Operation In 1975 the IEEE-488 standard defined the electrical and mechanical INTRODUCTION aspect for cables and connectors, as well as the handshaking, addressing and general protocol for transmitting individual bytes of information between instruments and computers.

  • Page 76: Ieee 488 Functional Description

    As a listener, the device receives device-dependent data from a talker. There can be many listeners at any given time. The MODEL-7030 gauss/tesla meter can act as a talker or a listener.

  • Page 77: Functional Description

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Pin-8: Not Data Accepted This line is asserted by a listener until it has IEEE-488 BUS (NDAC) accepted a data byte. FUNCTIONAL DESCRIPTION Pin-9: Interface Clear Asserted by the system controller to force all...

  • Page 78: Figure 7-2 Rs-232 Connector

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Data is transmitted to the instrument on the receive (RX) line. Data is RS-232 transmitted to the computer on the transmit (TX) line. In most cases these FUNCTIONAL are the only signals needed for communications.

  • Page 79: Communications Setup

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Settings for the IEEE 488 (GPIB) and RS-232 formats are set in the COMMUNICATIONS COMMUNICATIONS menu. SETUP IEEE 488 (GPIB) Address The only setting that may be configured for the IEEE 488 bus is the instruments address.

  • Page 80: Table 7-2 General Command Summary For Ieee 488

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual IEEE-488 General bus commands have the same meaning to any instrument on the IEEE-488 bus. Often the user will be using an IEEE-488 controller card, GENERAL BUS such as a National Instruments PCI-GPIB. Along with the card a software...

  • Page 81: Error Queue And Output Queue

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual IEEE-488 DCL - DEVICE CLEAR GENERAL BUS This command clears the bus and returns it to a known state. All COMMANDS devices are affected. The instrument will cancel any pending (Continued) commands and clear its output buffers. Instrument settings are not affected.

  • Page 82: Figure 7-3 Condition, Event, And Enable Registers

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Each register set consists of three individual registers, as depicted in Figure 7-3. STATUS (Continued) The CONDITION register is a real time, read-only register that is constantly updated to reflect current operating conditions.
  • Page 83 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual STATUS BYTE The IEEE-488 bus is a common bus linking a master controller (your computer) to one or more instruments. If an instrument requires action from the controller it must somehow get the controller’s attention. A hardware line...

  • Page 84: Status Byte And Service Request

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual STATUS BYTE AND OSB - Operation Summary Bit: SERVICE REQUEST If any of the bits in the OPERATION EVENT register set, and their (SRQ) respective enable bits are set, the Operation Summary Bit (OSB) will (Continued) set.

  • Page 85: Standard Event Register

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual STANDARD EVENT If any of these bits set, and their respective enable bits are set, the Event Summary Bit (ESB) will set in the STATUS BYTE. REGISTER Figure 7-5 Standard Event register...

  • Page 86: Measurement Event Register

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual MEASUREMENT If any of these bits set, and their respective enable bits are set, the Measurement Summary Bit (MSB) will set in the STATUS BYTE. EVENT REGISTER Figure 7-6 Measurement Event register...

  • Page 87: Operation Event Register

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual OPERATION EVENT If any of these bits set, and their respective enable bits are set, the Operation Summary Bit (OSB) will set in the STATUS BYTE. REGISTER Figure 7-7 Operation Event register IDLE: Indicates the instrument is idle.

  • Page 88: Ieee 488.2 "Common" Command Syntax

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual IEEE-488.2 The “common” commands are recognized and acted upon in a similar manner by all IEEE-488.2 instruments, whether a DVM, scope, frequency “COMMON” meter, tesla meter, etc. These are the syntax rules:...

  • Page 89: Ieee 488.2 "Common" Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual IEEE-488.2 “COMMON” COMMANDS Table 7-3 Common Command Summary ACRONYM NAME BRIEF DESCRIPTION *CLS Clear status Clear all event registers and error queue. *ESE <NRf> Program event enable Program standard event enable register.
  • Page 90 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual *ESR? - STANDARD EVENT REGISTER QUERY IEEE-488.2 “COMMON” Read the contents of the STANDARD EVENT register. The results are placed COMMANDS in the output queue of the instrument. (Continued) NOTE: The STANDARD EVENT register is cleared after an *ESR? command.
  • Page 91 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual IEEE-488.2 *RST – RESET “COMMON” Cancels any pending commands and any response to any previously received COMMANDS *OPC or *OPC? commands. (Continued) *SAV <n> - SAVE SETUP The present state of the instrument, called the setup, can be saved in non- volatile memory and later recalled to instantly return the instrument to that state.

  • Page 92: Scpi Command Syntax

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI The SCPI commands provide a language protocol and define a standard set of commands to program every aspect of the instrument. These are the syntax COMMAND rules: SYNTAX 1) The first character of any command string is a colon (:).

  • Page 93: Scpi Commands- General

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- In the following discussion the commands are written such that the short form of the command is written in UPPER CASE letters and the remainder GENERAL of the command is written in lower case letters. Either form can be used.
  • Page 94 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Table 7-4c SCPI Status Register Commands COMMAND DESCRIPTION :STATus:MEASurement:EVENt? Query the Measurement Event reg. :STATus:OPERation:EVENt? Query the Operation Event reg. :STATus:QUEStionable:EVENt? Query the Questionable Event reg. :STATus:MEASurement:ENABle <NRf> Set the Measurement Event Enable reg.
  • Page 95 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Table 7-4g SCPI Averaging Commands COMMAND DESCRIPTION :CALCulate#:AVERage:COUNt <NRf> Define the number of measurements to average. :CALCulate#:AVERage:COUNt? Query the number of measurements to average. Table 7-4h SCPI Classifier (Limit) Commands COMMAND DESCRIPTION :CALCulate#:LIMit:LOWer:DATa <NRf>...
  • Page 96 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Table 7-4m SCPI Hold Commands COMMAND DESCRIPTION :CALCulate#:HOLD:MINimum:STATe <b> Enable/disable the MIN HOLD function :CALCulate#:HOLD:MINimum:STATe? Query the state of the MIN HOLD function :CALCulate#:HOLD:MINimum:CLEar Resets the value being held by the MIN HOLD function...

  • Page 97: Scpi Commands- Error Queue Messages And Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- As error messages occur, they are placed in the error queue. Each message will contain a number, a comma (,) and a brief description of the ERROR QUEUE error. Negative (-) numbers are used for SCPI defined messages while MESSAGES AND positive (+) numbers relate specifically to the instrument.
  • Page 98 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS – The clock supports 12-hour or 24-hour format. However, the format can only be set using the DISPLAY menu. The :SYSTem:TIMe command SYSTEM supports only a 24-hour format. If the clock has been set for 12-hour INFORMATION AND format <hours>...
  • Page 99 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS – A <year> less than 2000 will not be accepted because the instrument did not exist prior to the year 2000. The instrument does not check the SYSTEM validity of the day of the month. For instance, a date of February 31 will INFORMATION AND not generate an error.

  • Page 100: Scpi Commands- Status Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual The STATUS commands control and query the MEASUREMENT EVENT, SCPI COMMANDS- OPERATION EVENT and QUESTIONABLE EVENT registers as well as STATUS the error queue. COMMANDS :STATus:MEASurement:EVENt? :STATus:OPERation:EVENt? :STATus:QUEStionable:EVENt? Reads the contents of the specified EVENT register and places it in the output queue, then clears the register contents.

  • Page 101: Scpi Commands- Unit Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- These commands select the measurement units for temperature, vector angle, flux density and time-based measurements. UNIT COMMANDS :UNIT:ANGLe DEG|RAD Specifies that the vector summation angle units are to be in degrees (DEG) or radians (RAD).

  • Page 102: Scpi Commands- Range Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- These commands select either a fixed range or AUTO range for each channel, and specify if the measured flux density will be static (dc) or RANGE COMMANDS alternating (ac). Since these commands are channel-specific the “#” in each command should be replaced with the channel number 1,2 or 3.

  • Page 103: Scpi Commands- Filter Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- :SENSe#:FLUX:RANGe? RANGE COMMANDS Places an ASCII string in the output queue representing the present (Continued) ac/dc setting of the channel, the present range and the state of the AUTO range feature.

  • Page 104: Scpi Commands- Averaging Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual These commands control the software averaging. SCPI COMMANDS- AVERAGING Since these commands are channel-specific the “#” in each command COMMANDS should be replaced with the channel number 1,2 or 3. If the channel number is omitted then Channel-1 is assumed.
  • Page 105 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- :CALCulate#:LIMit:LOWer:DATa <NRf> :CALCulate#:LIMit:UPPer:DATa <NRf> CLASSIFIER (LIMIT) COMMANDS <NRf> is a signed decimal number that sets the lower and upper (Continued) <NRf> must be between 0.0000000000 and ± classifier limits. 29999999.

  • Page 106: Scpi Commands- Zeroing Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- These commands control zeroing of the Hall probe and the channel to which it is attached. ZEROING COMMANDS Since these commands are channel-specific the “#” in each command should be replaced with the channel number 1,2 or 3. If the channel number is omitted then Channel-1 is assumed.
  • Page 107 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual :INPut#:OFFSet <NRf> SCPI COMMANDS- RELATIVE OFFSET This command defines a fixed relative offset value, which will be COMMANDS subtracted from all measured values. The relative offset value will only (Continued) be used when the RELATIVE function is enabled.

  • Page 108: Scpi Commands- Analog Output Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Each channel provides an uncorrected analog output signal that originates SCPI COMMANDS- from the amplifier section of the instrument. This signal is not corrected for ANALOG OUTPUT errors in the Hall probe or instrument but is capable of high frequency COMMANDS operation.
  • Page 109 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Some data acquisition systems may require different analog input SCPI COMMANDS- ranges. For example, assume such a system cannot accept signals ANALOG OUTPUT greater than ± 2.0 volts. In this case you can specify 2.0V as the full- COMMANDS scale range of the analog output (<NRf>...
  • Page 110 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- :OUTPut#:COUPling2? ANALOG OUTPUT The type of signal selected for the corrected analog output (“AC” or “DC”) is COMMANDS placed in the output queue. (Continued) NOTE: This command does not affect the vector summation output. If “4”...

  • Page 111: Scpi Commands- Vector Summation Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- :CALCulate#:VSUMmation? VECTOR The latest vector summation result of the flux density readings from all SUMMATION three channels is placed in the output queue and will be between COMMANDS 0.0000000000 and ± 29999999. The meaning of this value depends upon the currently selected unit of measure (gauss, tesla, etc.).
  • Page 112 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual :CALCulate#:HOLD:MAXimum:STATe <b> SCPI COMMANDS- HOLD COMMANDS The MAX HOLD function is turned on when <b> is “1” or “ON”, or turned off (Continued) when <b> is “0“ or “OFF”. :CALCulate#:HOLD:MAXimum:STATe? The state of the MAX HOLD function (“OFF” or “ON”) is placed in the output queue.

  • Page 113: Scpi Commands- Measurement Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- :CALCulate#:HOLD:VALLey:STATe <b> HOLD COMMANDS The VALLEY HOLD function is turned on when <b> is “1” or “ON”, or (Continued) turned off when <b> is “0“ or “OFF”. :CALCulate#:HOLD:VALLey:STATe? The state of the VALLEY HOLD function (“OFF” or “ON”) is placed in the output queue.
  • Page 114 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual SCPI COMMANDS- MEASure#:FFLux? MEASUREMENT This command is similar to the MEASure#:FLUX? command but can be COMMANDS used to acquire new flux density readings at a much faster rate. (Continued) However, the returned values are not be as precise or accurate. For example, if the presently displayed reading is -2.87347 T, this command...

  • Page 115: Intermixing "Common" And Scpi Commands

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual INTERMIXING As mentioned earlier a string sent to the instrument can contain more than one command as long as the commands are separated by semicolons(;). “COMMON” AND “Common” and SCPI commands can be intermixed.

  • Page 116: Example Using The Event, Enable, And Condition Registers

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual EXAMPLE: If you are overwhelmed by the use of the EVENT, CONDITION and ENABLE registers, this example should help. USING THE EVENT, ENABLE, The goal is to get the attention of the computer when a reading is available AND CONDITION from Channel-2.

  • Page 117: Understanding Flux Density

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual Appendix A Understanding Flux Density Magnetic fields surrounding permanent magnets or electrical conductors can be visualized as a collection of magnetic flux lines; lines of force existing in the material that is being subjected to a magnetizing influence.

  • Page 118: Figure A-2 Hall Effect Sensor

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual MEASUREMENT OF FLUX DENSITY: A device commonly used to measure flux density is the Hall effect sensor. A Hall effect sensor is a thin slice of a semiconductor material to which four leads are attached at the midpoint of each edge, as shown in Figure A-2.

  • Page 119: Vector Summation Tutorial

    Appendix B Vector Summation Tutorial The Model 7030 gauss/tesla meter is an extremely useful tool for acquiring simultaneous magnetic field measurements from two or three individual probes or from a 3-axis probe. The instrument presents vector summation results directly to the user, eliminating the need to perform manual calculations.
  • Page 120 F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual In some cases it is useful to know the rotational angle, α, between one axis and the vector sum. Figure B-2 depicts this. The classical representation defines the angle between the x-axis and the vector sum, rotating counterclockwise.

  • Page 121: Figure B-3 Three-Dimensional Co-Ordinate System

    F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual A similar system can be used to define a point in three-dimensional space, as visualized in Figure B-3. In this system a point can be defined by its combined horizontal (x), vertical (y) and depth (z) distance from the origin of the graph.
  • Page 122 THIS SIDE BLANK ! (Back B-3)

  • Page 123: Warranty

    WARRANTY This instrument is warranted to be free of defects in material and workmanship. OECO, LLC’s (hereafter OECO) obligation under this warranty is limited to servicing or adjusting any instrument returned to the factory for that purpose, and to replace any defective parts thereof. This warranty covers instruments which, within one year after delivery to the original purchaser, shall be returned with transportation charges prepaid by the original purchaser, and which upon examination shall disclose to OECO’s satisfaction to be defective.
  • Page 124 THIS SIDE BLANK ! (Back of Warranty)
  • Page 125 THIS SIDE BLANK ! (Inside of Rear Cover)
  • Page 126 4607 SE International Way Milwaukie, OR 97222 Phone: 503-659-5999 www.oeco.com...

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