Agilent Technologies 34980A Service Manual Page 67
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Calibration Procedures 3
34980A Service Guide 55
Zero Offset Verification Procedure
1 Make sure you have read “DMM Test Considerations" on page 53.
2 Short all the inputs on the input test connector (see page 52).
Leave the Current input open. Connect the shorts as close to the input
connector as possible.
3 Select each function and range in the order shown in the table below.
Make a measurement and return the result. Compare measurement
results to the appropriate test limits shown in the table.
[1] Select 6½ digit resolution.
[2] For 2-wire ohms using a multiplexer for the input connections, an additional 4
of error for the relay
contacts must be added.
Q: Quick performance verification test points.
Quick
Check
Error from Nominal
Input Function
[1]
Range 24 hour 90 day 1 year
Open DC Current 10 mA ± 1 µA ± 2 µA ± 2 µA
Open 100 mA Q ± 4 µA ± 5 µA ± 5 µA
Open 1 A ± 60 µA ± 100 µA ± 100 µA
Short DC Volts 100 mV ± 3.5 µV ± 4 µV ± 4 µV
Short 1 V ± 6 µV ± 7 µV ± 7 µV
Short 10 V Q ± 40 µV ± 50 µV ± 50 µV
Short 100 V ± 600 µV ± 600 µV ± 600 µV
Short 300 V ± 6 mV ± 9 mV ± 9 mV
Short 2-Wire Ohms
[2]
and 4-Wire
Ohms
100 ± 3.5 m ± 4 m ± 4 m
Short 1 k ± 6 m ± 10 m ± 10 m
Short 10 k Q ± 50 m ± 100 m ± 100 m
Short 100 k ± 500 m ± 1 ± 1
Short 1 M ± 10 ± 10 ± 10
Short 10 M ± 100 ± 100 ± 100
Short 100 M ± 10 k ± 10 k ± 10 k
NOTE
Zero offset calibration using a multifunction calibrator is NOT
recommended. The calibrator and cabling offset can be large and
unstable causing poor offset calibration of the internal DMM.
- Agilent 34980A 1
- Multifunction 1
- Switch/Measure Unit 1
- Additional Safety Notices 3
- Front Panel at a Glance 5
- Rear Panel at a Glance 6
- Rear Panel Connector Pinouts 7
- Front Panel Menu Reference 9
- Advanced 10
- Instrument Rack Mounting 11
- 367.7 mm (14.48 in) 12
- 101.9 mm (4.01 in) 12
- or 12
- 70.4 mm (2.78 in) 12
- 425.6 mm (16.76 in) 12
- Contents 13
- 3 Calibration Procedures 14
- 5 Disassembly and Repair 15
- 7 Backdating 16
- Obtaining Service 17
- Repackaging for Shipment 19
- Cleaning 19
- Self Test Procedures 20
- Obtaining Service 1 21
- 34980A Service Guide 9 21
- 1 Obtaining Service 22
- Specifications 23
- 2 Specifications 24
- Configurable by bank 33
- C or CAL:MOD? ± 5C 34
- ±(% of reading + % of range) 39
- Temperature Specifications 40
- Typical System Speeds 41
- –40°C to 70°C 47
- Product Dimensions 48
- Specifications 2 51
- 34980A Service Guide 39 51
- 34980A Service Guide 41 53
- (for the 100 mV, 1 V 53
- Calibration Procedures 55
- Calibration Procedures 3 57
- 34980A Service Guide 45 57
- Recommended Test Equipment 58
- Calibration Security 59
- Calibration Message 60
- Calibration Count 60
- Calibration Process 61
- Self-Test 62
- Quick Performance Check 63
- insulated 64
- DMM Test Considerations 65
- Zero Offset Verification 66
- of error for the relay 67
- Gain Verification 68
- Zero Adjustment Procedure 73
- Gain Adjustment 74
- –100 kHz 75
- Gain Adjustment Procedure 76
- Plug-in Modules 78
- 34980A Service Guide 67 79
- 34951A Verification 80
- Analog Output Adjustment 83
- 34952A Multifunction Module 84
- Relay Plug-in Modules 86
- 34980A Service Guide 75 87
- Agilent Technologies 89
- Unit seems inoperative 90
- Isolating to an assembly 90
- Unit fails self-test 90
- Power Supply 91
- Product Firmware Updates 91
- Instrument Errors 92
- Front-Panel Operation 93
- Remote Interface Operation 93
- Error Numbers 94
- Self-Test Errors 97
- Calibration Errors 98
- Firmware Update Errors 99
- Plug-In Module Errors 100
- Relay and FET Replacement 103
- 92 34980A Service Guide 104
- 94 34980A Service Guide 106
- 96 34980A Service Guide 108
- 98 34980A Service Guide 110
- 100 34980A Service Guide 112
- 102 34980A Service Guide 114
- 104 34980A Service Guide 116
- Two-Wire Mode 119
- One-Wire Mode 119
- 34933A Two-Wire Mode 120
- 34933A One-Wire Mode 121
- 34937A 32-Channel GP Switch 123
- Disassembly and Repair 125
- Surface Mount Repair 126
- Tools Required 126
- Basic Disassembly 127
- in the mainframe as shown 128
- Power Supply Disassembly 129
- KOM Removal 130
- Front Panel Removal 131
- Front Panel Disassembly 132
- DMM Removal 133
- Backplane Removal 134
- Replaceable Parts 135
- Mainframe Replaceable Parts 137
- 34921A Replaceable Parts 138
- 34922A Replaceable Parts 138
- 34923A Replaceable Parts 139
- 34924A Replaceable Parts 139
- 34925A Replaceable Parts 139
- 34931A Replaceable Parts 140
- 34932A Replaceable Parts 141
- 34933A Replaceable Parts 142
- 34937A Replaceable Parts 142
- 34938A Replaceable Parts 142
- Vendor Addresses 143
- 6 Replaceable Parts 144
- Backdating 145
- Diagrams 147
- 34921A Component Locator 148
- 34922A Component Locator 149
- 34923A Component Locator 150
- 34924A Component Locator 151
- 8 Diagrams 152
- Diagrams 8 153
- 34980A Service Guide 141 153
- 34931A Component Locator 154
- 34932A Component Locator 155
- 34933A Component Locator 156
- 34937A Component Locator 157
- 34938A Component Locator 158
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