Valhalla Scientific 4300C Скачать руководство пользователя страница 72 | Manualshive

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Current Source Calibration

The following procedure should be performed when calibrating the current source section of the 4300C.
In all steps the current source is calibrated to the internal voltmeter therefore the sense calibration,
described earlier in this section, should be performed before proceeding. Alternately, an external
voltmeter of greater than ±0.005% accuracy may be used.

Reference Adjustment

This adjustment should only be performed if components in the reference section have been replaced
and need not be performed on a routine basis. A DC voltmeter with a minimum of ±0.03% accuracy is
needed to make the adjustment.

Connect the voltmeter low lead to 0V (front of R117) and the voltmeter high lead to IC101 pin 5. Adjust
RV101 for 1.0000V. Remove the voltmeter leads.

10 Amp Adjustment

Connect the 0.1Ω standard resistor to the 4300C using four-wire connections. Select the 2V and 10A
ranges on the 4300C. Adjust RV102 for a reading of 100.00mΩ. Allow extra time for settling in this range.
Keep the cover on as much as possible to ensure proper cooling of components.

1 Amp Adjustment

Connect the 1Ω standard resistor to the 4300C using four-wire connections. Select the 2V and 1A ranges.
Adjust RV103 for a reading of 1000.0mΩ.

0.1 Amp Adjustment

Connect the 10Ω standard resistor to the 4300C using four-wire connections. Select the 2V and .1A ranges.
Adjust RV104 for a reading of 10000mΩ.

10mA Adjustment

Connect the 100Ω standard resistor to the 4300C using four-wire connections. Select the 2V and 10mA
ranges. Adjust RV105 for a reading of 100.00Ω.

1mA Adjustment

Connect the 1kΩ standard resistor to the 4300C using four-wire connections. Select the 2V and 1mA
ranges. Adjust RV106 for a reading of 1.0000kΩ.

0.1mA Adjustment

Connect the 10kΩ standard resistor to the 4300C using four-wire connections. Select the 2V and .1mA
ranges. Adjust RV107 for a reading of 10.000kΩ.

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Содержание 4300C

Страница 1: ...4300C Programmable Micro Ohmmeter Revision 64 1...

Страница 2: ......

Страница 3: ...hese to determine appropriate warranty dates We will repair the instrument during the warranty period provided it is returned to Valhalla Scientific Inc freight prepaid No other warranty is expressed...

Страница 4: ...T perform procedures involving cover or shield removal unless you are qualified to do so DO NOT operate damaged equipment Whenever it is possible that the safety protection features built into this pr...

Страница 5: ...ure Compensator Mode Specifications 11 General Specifications 11 Environmental 11 Power Requirements 11 Physical 11 Getting Started 12 4 Wire Configuration 12 Front Panel 13 On Off Switch 13 Display 1...

Страница 6: ...easurement Mode 25 TCM Temperature Compensated Measurement Mode 25 Omni Compensator 26 TCM ON 26 TCS Temperature Compensator Setup 27 TCC Temperature Compensator Calibration 28 HLC Hi Lo Comparator Mo...

Страница 7: ...r Clip Type Leads 37 Needle Type Probes 38 Surface Probes 38 Other Lead Sets 38 Remote Operations 39 IEEE Interface 39 Definitions 39 Bus Restrictions 40 Detailed Descriptions of Bus Operations 41 Set...

Страница 8: ...tors 51 Entering Commands 51 Command Characters 51 Combining Commands 52 Synopsis of Commands 52 DETAILS OF COMMAND REFERENCE 52 COMMAND INDEX 52 Routine Maintenance 67 General 67 Required Test Equipm...

Страница 9: ...ents are identified by a two part serial number The Serial Tag is located on the rear or bottom of the instrument The number is in a form of 64 0000 The first two digits called the serial number prefi...

Страница 10: ...Valhalla Scientific Inc or any of its sales offices prior to obtaining authorization to do so Setting the Line Voltage The line voltage selection is preconfigured according to the country to which it...

Страница 11: ...ter of gravity dictate that it must be supported on both sides along its entire length using trays or slides If it is to be transported while mounted in a rack it should be supported to prevent upward...

Страница 12: ...7 20m 200mV 20 000m 1 10A 0 06 0 003m 50ppm C 8 200m 200mV 200 00m 10 1A 0 04 0 03m 50ppm C 9 2 200mV 2 0000 100 1A 0 04 0 0003 50ppm C 10 20 200mV 20 000 1m 10mA 0 04 0 003 50ppm C 11 200 200mV 200...

Страница 13: ...ions General Specifications Display Multi Section VFD 140px x 32px Overload Indication Display flashes OVERLOAD Terminal Configuration Four wire Kelvin ADC Conversion Rate 45 conversions second Displa...

Страница 14: ...oltage drop across the load There is negligible contact and lead resistance error created by the voltage measurement because the high input impedance of the DVM limits current flow in the voltage lead...

Страница 15: ...power switch is a two position ON OFF rocking switch used to apply ON position or disconnect OFF position the AC power source from the internal circuitry of the ohmmeter Display During measurements th...

Страница 16: ...ge As the Ohms range increases the current range decreases and vice versa Test Current Key The Test Current key is used to turn the current source ON and OFF A red LED within the Test Current key indi...

Страница 17: ...RUN HOLD key is used to switch between run and hold state Also used to select the hold configuration Print 5 The PRINT key is used to trigger the output of a print or log package to the RS 232 port Al...

Страница 18: ...he display indicates a missing sensor or that the sensor is not properly inserted in the receptacle The TCM key is used to enable or disable the TCM mode HLC LEDs This portion of the front panel is de...

Страница 19: ...ated brass contact material The posts can accept standard banana plugs wires up to 12 AWG or spade lugs The four terminals provide full 4 Wire Kelvin measurement capability The right posts are the cur...

Страница 20: ...iding the switch upwards the number 115 will appear on the switch The instrument is now configured for line voltages of 115VAC 10 By sliding the switch downwards the number 230 will appear The instrum...

Страница 21: ...y contact closure feature allows an automated sorting process to be set up at an economical cost The screw type terminal allows connections to wire or spade lugs Contacts are rated at 100V 100mA The t...

Страница 22: ...fuse and the line voltage selection switch settings Power On Default Settings Once on the ohmmeter performs its power on routine Figure 6 When the power on routine is finished the ohmmeter will beep...

Страница 23: ...rce terminals Connect the first lead between the SENSE HI and SOURCE HI terminals with the ground marker on the source side Connect the second lead between the SENSE LO and SOURCE LO terminals with th...

Страница 24: ...e at the opposite side of your load making sure that the surface of the probe is in full contact with the surface of the load For hard to reach surfaces Valhalla Scientific offers three different sets...

Страница 25: ...20k The two keys labeled F S Voltage are used to change the voltage setting The key is used to increase the voltage setting and the key is used to decrease the setting Within a voltage setting there...

Страница 26: ...s being measured a potentially lethal back EMF is induced when the test current is removed The 4300C provides a discharge path for this back EMF and monitors the voltage The SAFE LED is illuminated wh...

Страница 27: ...ature simulates a constant ambient temperature chamber for materials which are normally subject to varying ambient temperatures When in the TCM mode the temperature sensor Omni Compensator automatical...

Страница 28: ...or The user cannot interchange sensors between different ohmmeters without prior calibration Calibration will also be necessary if the sensor is purchased as a single item The TCM calibration routine...

Страница 29: ...r associated with one of the configurations and press ENTER or go to the next selection screen by pressing FUNC Press the number associated with one of the configurations and press ENTER or go to the...

Страница 30: ...Connect the Omni Compensator to the TCM receptacle on the front panel of the Ohmmeter Allow the Omni Compensator to reach ambient temperature Wait 5 to 10 minute before proceeding Press ENTER to cont...

Страница 31: ...can be used to implement an automated batch sorting system for components or products operate counters sound alarms or shut off a process Resistors transformers strain gauges thermocouples and thermis...

Страница 32: ...to bring up the first input screen Using the numeric keys input a value for the upper limit Use CLEAR as a backspace to correct errors Press ENTER to continue Using the numeric keys input a value for...

Страница 33: ...the set limits press VIEW HLC The screen will display the both the upper and lower limit set for that range Update Function The Update function is designed to allow the user to set the display update...

Страница 34: ...Intensity To change the display update rate and the display intensity Press FUNC UPDATE Select an update rate using the numerical keys from 1 thru 5 and press ENTER Select an intensity level using th...

Страница 35: ...function window displays PKHI To exit the PKHI state press RUN HOLD again the function window displays RUN RUN PKLO When configured for Run PeakLo pressing the RUN HOLD key will activate the Peak Lo...

Страница 36: ...ransmits the measurements at a rate equal to the display update rate Pressing the print key once again will terminate the transmission The measurements are transmitted in the same format in which they...

Страница 37: ...een displays the HLC limits for the range that is selected at the time In this mode the user can switch through the ranges to view all the values set as limits RUN HOLD The screen will display the con...

Страница 38: ...ers are provided CET With Option CET the 4300C comes with a pair of Rear Panel Current Enable Terminals The terminal must be shorted for the 4300C to output current CET functions as a safety interlock...

Страница 39: ...elvin Lead Set K is a shielded 4 wire Kelvin cable set 48 inches in length terminated in gold plated alligator clips KCS Option K is the recommended general purpose lead set for most applications Figu...

Страница 40: ...g testing on a variety of screened or flat surfaces Test current is evenly distributed through the probe base while sensing is accomplished via a spring loaded center contact The target area is 1 inch...

Страница 41: ...multi wire cable Bi Directional Bus A highway used for two way communication with input and output data being carried on the same lines Bit Parallel A data transmission method in which all the bits c...

Страница 42: ...also capable of operating as a talker or listener The other devices may be listeners only able to receive data or talkers only able to send data or both The model 4300C can talk and listen The contro...

Страница 43: ...y any listener Indicates that the listener is not ready to receive data NDAC May be asserted by any listener Indicates that the listener has not yet finished reading the data byte The transfer of data...

Страница 44: ...ependent command is specific to a particular device and may or may not be understood by other devices 7 Requires Secondary Command 0 1 2 3 4 5 6 7 COLUMN ISO BIT 7 0 0 0 0 1 1 1 1 ROW DIO LINE 6 0 0 1...

Страница 45: ...and 16 are ON or 1 The resulting address is 1 1 2 0 4 0 8 1 16 1 1 8 16 25 The address you choose is entirely dependent on your application and by the type and quantity of devices on your IEEE bus Som...

Страница 46: ...state and illuminate the REMOTE indicator Verify that no other device on the bus was affected by execution of this command Reading the Display Data The resistance data on the 4300C s display is always...

Страница 47: ...ndicated by 2 0000E Each response is terminated with an output data terminator which is used to signal the end of the transmission to the controller The default terminator is a C R L F carriage return...

Страница 48: ...20mV range V1 Selects the 200mV range V2 Selects the 2V range Test Current Range The I command sets the value of test current that will be used to make the resistance measurement The 4300C interprets...

Страница 49: ...such as National Instruments Test Current Control The C command is used to enable or disable the output of the current source This command is decoded as follows C0 Turns the test current off C1 Turns...

Страница 50: ...ntil this word is read The word is in the format Q V I SND C UHF Where Q reflects the present value of the SRQ command V reflects the present voltage range setting I reflects the present test current...

Страница 51: ...L F w EOI Test Current ON 2 2V 10mA C R 3 100mA C R w EOI 4 1A 5 10A Table 9 IEEE Commands Quick Reference S Selects hold mode Triggers single reading T Selects continuous reading mode N Selects norma...

Страница 52: ...4300C is set up with a RS232 interface please check the following points Many devices require a constant high signal on one or more input pins Ensure that the signal ground of the equipment is connec...

Страница 53: ...queue for storing the pending commands or return messages is to prevent the transmitted commands of remote control and return messages from missing As the maximum stored capacity for Error Event Queu...

Страница 54: ...ntax and return values for each are explained in the function header The STB gives the status of the command Remote mode is entered when a valid printable character is received and is exited with the...

Страница 55: ...T_ALARM_NO_FAULT 00 FAULT_ALARM_OVER_TEMP 01 Internal temperature too high FAULT_ALARM_CAL_LIMIT 02 Input level for calibration exceeded limit FAULT_ALARM_TCM 04 Input level for TCM calibration exceed...

Страница 56: ...SPACE 10 Low on space in transmit buffer FAULT_ALARM_TXBUF_FULL 20 Serial transmitter buffer full FAULT_ALARM_RCVBUf_FULL 40 Serial receiver buffer full FAULT_ALARM_NVRAM 80 NV RAM fault Power on defa...

Страница 57: ...g fixed point Ohm value for current range 1 0000 for 1 in the 2 range and 100 00 for 100m in the 200m range This command reads the value from RAM memory only If you have used the HLCHI command to writ...

Страница 58: ...d to write a HLC value it will be different than the value stored in non volatile memory if the SAVSETUP command has not been sent Send RANGE command before sending this command Power on default Depen...

Страница 59: ...GE_3 KEY_UPDATE KEY_1 KEY_HLC KEY_2 KEY_ADDR KEY_3 KEY_RUNHOLD KEY_4 KEY_PRINT KEY_5 KEY_TCM KEY_6 KEY_AUTO_RNG KEY_7 KEY_CAL KEY_8 KEY_BCD KEY_9 KEY_VIEW KEY_0 KEY_DISPLAY KEY_1 KEY_mk KEY_DP Power o...

Страница 60: ...E_3 KEY_UPDATE KEY_1 KEY_HLC KEY_2 KEY_ADDR KEY_3 KEY_RUNHOLD KEY_4 KEY_PRINT KEY_5 KEY_TCM KEY_6 KEY_AUTO_RNG KEY_7 KEY_CAL KEY_8 KEY_BCD KEY_9 KEY_VIEW KEY_0 KEY_DISPLAY KEY_1 KEY_mk KEY_DP Usage Ke...

Страница 61: ...This key is active in REMOTE mode and will extinguish the REMOTE LED and transition the device to the front panel local user mode LOG COMMAND Selects LOG mode on or off Syntax LOG ON or OFF 0 synonymo...

Страница 62: ...removed during remote formatting Syntax OHMS Example OHMS crlf 20 000 crlf on 20m or 20k Ohm ranges Response 20 000 crlf Power on default 0 000 Note For Scientific notation Engineering format use RDNG...

Страница 63: ...er 1 18 01 RNG1 2 0000m V1 I1 02 RNG2 20 000m V1 I2 03 RNG3 200 00m V1 I3 04 RNG4 2 0000 V1 I4 05 RNG5 20 000 V1 I5 06 RNG6 200 00 V1 I6 07 RNG7 20 000m V2 I1 08 RNG8 0 20000 V2 I2 09 RNG9 2 0000 V2 I...

Страница 64: ...e Range number 1 3 1 20mV 2 200mV 3 2V TEST CURRENT COMMAND Selects TEST CURRENT on or off Syntax TCURRENT ON or OFF Power on default OFF TEST CURRENT QUERY Responds with TEST CURRENT on or off Syntax...

Страница 65: ...buffer Tiny Display System Formats Display String 1 6543k Remote READING System Places in TX buffer to VFD D characters Remote RANGE 4 System Change to R4 System Executes READING query uses Range 4 an...

Страница 66: ...tores current RAM setup data in NV RAM Syntax SAVSETUP crlf SAVSETUP QUERY Refreshes the current Setup from NV RAM and then sends it to the remote port Syntax SAVSETUP crlf Response FF EE DD CC BB AA...

Страница 67: ...NG_PARAM 4 CMD_INVALID_PARAM 8 CMD_MODE_OFF 16 CMD_INCORRECT_NUMBER_PARAMS 32 64 128 CMD_CALLAREALPGMR Power on default 0 Note After a command or query with or without a response the STB query respond...

Страница 68: ...TCM mode on or off Syntax TCM Example TCM crlf ON crlf Response ON or OFF Power on default OFF Send this date after the calibration is complete followed by a SAVESETUP to store in EE memory TST QUERY...

Страница 69: ...1 1 10 100 1k 10k 2 DC voltage standard capable of outputting 10mV 300mV 1V and 2V Valhalla Model 2701C is suitable for the task 3 Four wire test lead set 4 Precision Digital Voltmeter Note If this e...

Страница 70: ...to choose the standard calibration III Apply a short between the Sense Hi and the Sense Lo binding post Once the short is applied press ENTER The ohmmeter will perform the zero calibration for all ran...

Страница 71: ...splay apply 2V to the sense terminals Press ENTER to continue or CLEAR to return to the 300mV cal screen While calibrating the ranges the screen will display the following information VII When prompte...

Страница 72: ...o the 4300C using four wire connections Select the 2V and 10A ranges on the 4300C Adjust RV102 for a reading of 100 00m Allow extra time for settling in this range Keep the cover on as much as possibl...

Страница 73: ...III When prompted by the display press ENTER to save the calibration values to memory or press CLEAR to return to the TCM full scale cal screen IV Connect an Omni Compensator to the TCM receptacle on...

Страница 74: ...72 Figure 12 Drawing 4300C 700...

Страница 75: ...rent When measuring highly inductive loads the settling time of the ohmmeter is determined by the compliance voltage of the current source Typically the compliance voltage of a 4300C in the Charging I...

Страница 76: ...This effect may be reduced by using fully shielded cables such as Valhalla Option K It may also be helpful and will cause the settling time to be reduced if the unused windings of the transformer can...

Страница 77: ...isconnected until the SAFE cable disconnect status LED is illuminated The time required to discharge the inductor into the Flyback diode is given by the formula T L x I V T Discharge time in seconds L...

Страница 78: ...application R might be approximately 1 milliohm 001 and L might be 1000 Henries If the 10 amp range of the 4300C was used to measure the inductor 7 000 000 seconds are required 11 weeks to discharge i...

Страница 79: ...und any notices regarding manual changes or operating instructions for the optional interfaces if installed Please refer to any applicable material before attempting to operate your ohmmeter If no ite...

Страница 80: ...78...

Страница 81: ...79...

Страница 82: ...call 800 548 9806 or visit valhallascientific com Email support available at support valhallascientific com 4300C Programmable Digital Micro Ohmmeter User Manual Revision 64 1 2021 Copyright 2021 Valh...

Страница 83: ......

Страница 84: ...4300C Programmable Digital Micro Ohmmeter User Manual Revision 64 1 2021 Copyright 2021 Valhalla Scientific Inc All rights reserved...

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