Guildline 9211B Series Скачать руководство пользователя страница 30 | Manualshive

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Guildline 9211B Series Скачать руководство пользователя страница 30

Section 5

TM9211B-A-00

6 November 2013

5-1

5.0

MAINTENANCE

Maintenance of the resistor consists only of routinely inspecting the unit for physical damage and
cleanliness. Cleanliness is especially important on the high value resistors (1 M and greater).
These should be cleaned with isopropanol and a soft brush or cloth. Special care should be taken
to ensure that the terminal connectors are clean.

5.1

Maintenance, Inspection and Cleaning

5.1.1

Inspection

Inspect the shunt panel before operation. It should be free from physical damage with no broken or
bent binding posts.

5.1.2

Cleaning

Front panel by wiping with a dryt lint-free cloth. Male plugs and receptacles can be wiped with a crocus
cloth if they appear discolored. Do not use sand paper. Avoid using a cleanser since many leave a film.

Caution

Do not remove rear cover to clean inside of shunt box. Physical movement of shunts can cause
mounting stress and changes in resistance values.

5.2

Troubleshooting

5.2.1

Steps for Trouble Shooting the 9211B

5.2.1.1

A visual inspection is most important. Check to see if rear cover or panel is warped or

distorted. If it is, the entire unit should be re-calibrated at once.

5.2.1.2

If the binding post heads on the front panel are broken, they should be replaced.

5.2.1.3

If an electrical overload has been applied beyond the rating of each resistor, the entire

unit should be re-calibrated at once. (Note: A burned shunt will have a distinct charred odor).

5.2.1.4

If an open or intermittent circuit is found in the instrument, (no reading or varying

reading on millivoltmeter), check per 5.2.1.5 to 5.2.1.8.

5.2.1.5

All lead connections to binding posts must be tight. Leads should be checked for

continuity using a circuit tester. See that plugs are firmly inserted in female receptacles.

5.2.1.6

Lead connectors, plugs and receptacles should be checked for clean surfaces. Clean, if

required, using a crocus cloth.

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Содержание 9211B Series

Страница 1: ...rietary to Guildline Instruments Limited They are to be used only as a guide to the operation and maintenance of the equipment with which this manual was issued and may not be duplicated or transmitted by any means either in whole or in part without the written permission of Guildline Instruments Limited TM9211B A 00 6 November 2013 ...

Страница 2: ......

Страница 3: ... 4 3 2 8 Minimum accuracy 3 4 3 3 Additional Applications of the Model 9211B 3 5 4 0 Calibration and Performance Verification 4 1 4 1 Introduction 4 1 4 2 Calibration Overview 4 1 4 3 Calibration Interval and Performance 4 1 4 4 Equipment and Standards Required for Calibration 4 2 4 5 Routine Calibration 4 3 4 6 Nominal Value Calibration Procedure 4 5 4 6 2 Calibration of 0 01 mA 10 k Ranges to 1 ...

Страница 4: ... 6 November 2013 ii 5 0 Maintenance 5 1 5 1 Maintenance Inspection and Cleaning 5 1 5 1 1 Inspection 5 1 5 1 2 Cleaning 5 1 5 2 Troubleshooting 5 1 5 2 2 Short Circuit Troubleshooting 5 2 5 3 Replaceable Parts 5 2 ...

Страница 5: ...Connections 3 2 Figure 3 3 Range Selector Plugs 3 2 Figure 3 4 Potential Terminals 3 3 Figure 5 1 9211B Schemtic Overview 5 6 LIST OF TABLES Table 4 1 List of Recommended Test Currents or Voltages For Resistance Values 4 4 Table 4 2 9211B Nominal Calibration Data Worksheet 4 8 Table 4 3 9211B Optional Calibration Data Worksheet 4 13 ...

Страница 6: ...s guildline com Website is www guildline com 1 1 Warranty Guildline Instruments warrants its products to be free of defects in manufacture and normal operation for a period of two 2 years from the date of purchase except as otherwise specified This warranty applies only in the country of original purchase and only to the original purchaser who is also the end user Equipment which is defective or f...

Страница 7: ... The customer or purchaser must complete all final claims with the carrier Regular charges will apply to non warranty service External service charges and expenses will be billed at cost plus handling 1 2 To Obtain Warranty or Calibration and Repair Service Returns and or Calibration and Repair Service Requests Telephone Fax and email addresses to contact Guildline are provided previously Guildlin...

Страница 8: ...se death The 9211B DC Shunts are designed to work within operating specifications Applying more than the recommended current will damage the unit Inspect the 9211B for damage such as cracked connectors prior to use If the unit has a burned smell or smoke is visible during use discontinue use immediately If test equipment used with DC Shunts overloads or trips this could be a sign that the 9211B re...

Страница 9: ... 10 0 01 10 1000 0 001 100 0 05 30 10 W 0 000 333 333 300 0 1 30 30 W Note 1 Calibrated in air at 23 1 o C referred to the unit of resistance as maintained by a National Metrology Institute and expressed as a deviation from nominal with a total uncertainty and coverage factor of k 2 Note 2 A traceable report of calibration stating the measured values and uncertainty is provided with each unit at t...

Страница 10: ... still wider range of ambient temperatures The resistors are made of selected zeranin wire and are non inductively wound up to 1 ampere The unit consists of nine 9 shunts of the 4 terminal configuration Each shunt provides a 100 mV drop at the nominal rated current The maximum current rating is 140 of nominal for all ranges except the 100 A and 300 A ranges for which the maximum is 110 of the nomi...

Страница 11: ...el One plug is inserted over the other in a vertical line For example if the range selected is 0 01 A insert the two plugs in the two receptacles directly over the engraved portion marked with the numeral 0 01 A for current and 10 Figure 3 3 Range Selector Plugs Common low Connector Used for all common inputs to 300 A and all ranges and ALL range plug settings 300 A High Current Connector Used for...

Страница 12: ...ree i e both common binding posts must be connected in the same polarity Note 2 If the readout device is a low resistance milli voltmeter inaccuracies can result proportional to the current drain All potentiometers have a finite resistance so their use will result in some loss of accuracy due to circuit loading If a DVM is employed its input impedance should be checked to see that it is sufficient...

Страница 13: ...lli voltmeter is multiplied by 3 and the decimal point arbitrarily fixed 3 2 7 Full Rated Accuracy Each shunt can be used at rated nominal current to full accuracy with no duty cycle limitations For the 100 A and 300 A ranges 30 minutes to 1 h minimum should be allowed for the meter readings to settle to due to thermal dissipation effects All other ranges should be stable within 15 min or less Not...

Страница 14: ...itional Applications of the Model 9211B Each shunt can be employed as a separate 4 terminal standard resistor for measurements of resistance The operating procedure is identical to that described previously The circuit would include a resistance in series with the current connections rather than an instrument under test although it could include both if desired By measuring the voltage drop separa...

Страница 15: ...t back within the nominal range The second optional method is to use the actual calibrated value of each range and use this characterized value vs the nominal value of the standard Using the same 1 value 0 1 A range above as an example Say this value drifted at a upward rate of 15 per year In approximately 7 years this unit will have drifted 105 or 5 greater than the nominal tolerance of 100 Rathe...

Страница 16: ...nt and Standards Required for Calibration The following Resistance Standards and Test Equipment is required for calibration Standards and Equipment Required Complete 6625A Resistance Measurement System with 6623A 300A Range Extender Installed See Below for Alternative Acceptable Equipment Models Or Alternative Standards a Direct Current Comparator Resistance Bridge Acceptable Models Guildline Inst...

Страница 17: ...es with least operational influence on the measurements it is recommended that customers use automation technologies such as Bridgeworks R or Bridgeworks C Software IEEE control and 6664X Series Low Thermal Scanners can be used for automation of measurements up to 2 A Calibration Notes Always check availability of equipment and standards prior to starting the calibration If the required equipment ...

Страница 18: ...0 1 0 01 Adc 0 1 Adc 3 Calibrate in order minimum current to maximum current 0 01 0 001 Adc 0 01 Adc 3 Only 6622A Bridge Required No Range Extender needed for Remaining Tests Calibrate in order minimum current to maximum current 0 001 0 000 1 Adc 0 001 Adc 3 Only 6622A Bridge Required No Range Extender needed for Remaining Tests Calibrate in order minimum current to maximum current 0 000 1 0 000 1...

Страница 19: ...ridge measurement cycle refer to user manuals for bridge record the UUT value under MEASURED VALUE on the worksheet d Unit value should be between the minimum and maximum values If not unit will require repair e Repeat for all currents listed for each test point Always start with lowest current minimum heat dissipation and work to highest current f Repeat Steps b through d for remaining values 4 6...

Страница 20: ...h test point Always start with lowest current minimum heat dissipation and work to highest current 4 6 5 Calibration of 100 A 1 m Range a Common and Potential Cables should remain connected as before Disconnect the 10 A Current Cables and connect a cable capable of handling 300 A to the 100 A and Input Common Right side and to the 6623A 300 Range Extender 300 A output Potential Cables should remai...

Страница 21: ...work to highest current Note Measurement Tips Consider the following when setting up the measurement Verify that the max voltage or current applied in the measurement will not exceed the specs for the UUT or the STD For the 100 A and 300A range permit a stbilization time of 30 minutes for the lower currents and minimum 1h for test currents 100A and higher Verify the reversal rate is appropriated f...

Страница 22: ... Output 12 Month Tolerance 100 ppm CALIBRATION CURRENT ADC Lower Value Limit Measured Value Upper Value Limit 0 000 1 0 001 Ampere Output 12 Month Tolerance 100 ppm CALIBRATION CURRENT ADC Lower Value Limit Measured Value Upper Value Limit 0 0001 0 001 0 01 Ampere Output 12 Month Tolerance 100 ppm CALIBRATION CURRENT ADC Lower Value Limit Measured Value Upper Value Limit 0 001 0 01 0 1 Ampere Outp...

Страница 23: ...re Output 12 Month Tolerance 100 ppm CALIBRATION CURRENT ADC Lower Value Limit Measured Value Upper Value Limit 1 10 100 Ampere Output 12 Month Tolerance 500 ppm CALIBRATION CURRENT ADC Lower Value Limit Measured Value Upper Value Limit 10 100 300 Ampere Output Nominal Value 0 000 333 333 12 Month Tolerance 1000 ppm CALIBRATION CURRENT ADC Lower Value Limit Measured Value Upper Value Limit 30 0 00...

Страница 24: ...ent starting with lowest current first for the 300 A and after proper bridge measurement cycle refer to user manuals for bridge record the measured value under column h Calculate Actual Deviation and compare to Maximum Deviation Unit should be within maximum deviation values If not unit will require repair i Repeat for all currents listed for each 300 A test point Always start with lowest current ...

Страница 25: ...ximum deviation values If not unit will require repair e Repeat for all currents listed for each test point Always start with lowest current minimum heat dissipation and work to highest current 4 7 4 Calibration of 1 A 100 m Range a Disconnect the 10 A Red Cable and connect a cable capable of handling 1 A to the 9211B 1 A Terminal and and range Extender current output Move the Input Common cable c...

Страница 26: ...nts listed for each test point Always start with lowest current minimum heat dissipation and work to highest current f Repeat Steps b through d for remaining values Note Measurement Tips Consider the following when setting up the measurement Verify that the max voltage or current applied in the measurement will not exceed the specs for the UUT or the STD Verify the reversal rate is appropriated fo...

Страница 27: ...LIBRATION OHMIC VALUE CURRENT CALIBRATION ACTUAL DEVIATION 2 MAXIMUM DEVIATION 3 30 100 300 Optional 100 Ampere Output Nominal Ohmic Value 12 Month Tolerance 1 500 ppm A B C D E CALIBRATION CURRENT ADC OHMIC VALUE LAST CALIBRATION OHMIC VALUE CURRENT CALIBRATION ACTUAL DEVIATION 2 MAXIMUM DEVIATION 3 10 100 10 Ampere Output Nominal Ohmic Value 12 Month Tolerance 1 100 ppm A B C D E CALIBRATION CUR...

Страница 28: ...ION OHMIC VALUE CURRENT CALIBRATION ACTUAL DEVIATION 2 MAXIMUM DEVIATION 3 0 1 1 0 1 Ampere Output Nominal Ohmic Value 12 Month Tolerance 1 100 ppm A B C D E CALIBRATION CURRENT ADC OHMIC VALUE LAST CALIBRATION OHMIC VALUE CURRENT CALIBRATION ACTUAL DEVIATION 2 MAXIMUM DEVIATION 3 0 01 0 1 0 01 Ampere Output Nominal Ohmic Value 12 Month Tolerance 1 100 ppm A B C D E CALIBRATION CURRENT ADC OHMIC V...

Страница 29: ...DEVIATION 2 MAXIMUM DEVIATION 3 0 000 1 0 000 01 Ampere Output Nominal Ohmic Value 100 12 Month Tolerance 1 100 ppm A B C D E CALIBRATION CURRENT ADC OHMIC VALUE LAST CALIBRATION OHMIC VALUE CURRENT CALIBRATION ACTUAL DEVIATION 2 MAXIMUM DEVIATION 3 0 000 1 Note 1 12 Month Specification is a drift spefication This is the maximum drift per year allowed If UUT has not been calibrated in last 12 mont...

Страница 30: ...hunt box Physical movement of shunts can cause mounting stress and changes in resistance values 5 2 Troubleshooting 5 2 1 Steps for Trouble Shooting the 9211B 5 2 1 1 A visual inspection is most important Check to see if rear cover or panel is warped or distorted If it is the entire unit should be re calibrated at once 5 2 1 2 If the binding post heads on the front panel are broken they should be ...

Страница 31: ... 3 Compare each resistor to a standard resistor 5 2 2 4 If tests above are negative the problem may be in the internal wiring or resistors in the shunt Each shunt can be tested separately for continuity without removing the rear vented cover by inserting the two plugs in the paired female receptacles for each range and using an ohmmeter between the 10 A MAX or 100 A MAX or 300 A MAX binding post a...

Страница 32: ... 60 oz 17 g Part Number 30559 02 17 Manufacturer Guildline Instruments Cage Code 35939 Description Knob Assembly 3 8 16 300 A and Common Terminals Dimensions 1 8 1 9 Weight 1 8 oz 51 g Part Number 30559 01 17 Manufacturer Guildline Instruments Cage Code 35939 Description Knob Assembly 1 4 20 100 A Terminal Dimensions 1 5 1 4 Weight 0 72 oz 21 g Part Number 17749 01 12 Manufacturer Guildline Instru...

Страница 33: ...ription Precisiouesn 1 Range Resistor 0 1 A Current Range Dimensions diameter Weight 1 8 oz 51g Part Number 17798 02 02 Manufacturer Guildline Instruments Cage Code 35939 Description Pecision 10 Range Resistor 0 01 A Current Range Dimensions Weight 1 62 oz 46g Part Number 17798 03 02 Manufacturer Guildline Instruments Cage Code 35939 Description Precision 100 Range Resistor 0 001 A Current Range D...

Страница 34: ... 5 TM9211B A 00 6 November 2013 5 5 Part Number 17798 05 02 Manufacturer Guildline Instruments Cage Code 35939 Description Precision 10 k Range Resistor 0 000 01 A Current Range Dimensions 5 Weight 1 23oz 35g ...

Страница 35: ...M9211B A 00 6 November 2013 5 6 Figure 5 1 9211B Schemtic Overview 10 000 1 000 100 10 1 0 0 000 333 33 0 000 666 667 10 A 100 A 1 0 A 0 1 A 0 01 A 0 001 A 0 00001 A 0 0001 A 300 A P OTENTIAL 300A COM 100A COM 10A ...

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