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2620A/2625A
Users Manual
iv
Isolated and Shielded Sensor Configuration ............................................ 5-11
In More Detail............................................................................................... 5-12
6 Maintenance ....................................................................................... 6-1
Introduction ....................................................................................................... 6-3
Cleaning............................................................................................................. 6-3
Line Fuse ........................................................................................................... 6-3
Self-Test Diagnostics and Error Codes ............................................................. 6-3
Performance Tests............................................................................................. 6-4
Accuracy Verification Test........................................................................... 6-7
Channel Integrity Test................................................................................... 6-7
Thermocouple Measurement Range Accuracy Test ..................................... 6-9
4-Terminal Resistance Test........................................................................... 6-10
Thermocouple Temperature Accuracy Test.................................................. 6-11
Open Thermocouple Response Test ............................................................. 6-13
RTD Temperature Accuracy Test................................................................. 6-14
RTD Temperature Accuracy Test (Using Decade Resistance Source).... 6-14
RTD Temperature Accuracy Test (Using DIN/IEC 751)......................... 6-15
Digital Input/Output Verification Tests........................................................ 6-15
Digital Output Test ................................................................................... 6-16
Digital Input Test...................................................................................... 6-16
Totalizer Test............................................................................................ 6-17
Totalizer Sensitivity Test.......................................................................... 6-18
Dedicated Alarm Output Test ....................................................................... 6-19
External Trigger Input Test........................................................................... 6-21
Calibration......................................................................................................... 6-21
Variations in the Display................................................................................... 6-22
Service............................................................................................................... 6-22
Appendices
A Specifications.............................................................................................. A-1
B ASCII & IEEE-488 Bus Codes ................................................................... B-1
C IEEE-488.2 Devise Documentation Requirements..................................... C-1
D Making Mixed Measurements .................................................................... D-1
E Binary Upload of Logged Data (LOG_BIN?) (2625A only)...................... E-1
F RS-232 Cabling........................................................................................... F-1
Index