
Model 2302-V001
RESISTOMAT®
Page 5
Brief
guide
Operation
Calibration
Test and offset
instructions
RS232 data
output Introduction &
applications
Description
of functions
Accessories and
Circuit diagram
Pages
Introduction and applications..................................................................... 7
Introduction..................................................................................................... 7
Four-wire resistance measurement................................................................ 8
Applications.................................................................................................... 10
Description of functions.............................................................................. 11
General information........................................................................................ 11
Current source................................................................................................ 11
Digital voltmeter.............................................................................................. 12
Brief guide..................................................................................................... 13
Operation....................................................................................................... 15
Mains connection........................................................................... 15
Power-on....................................................................................... 15
Warm-up period............................................................................ 15
Zero setting................................................................................... 15
Absolute value measurement........................................................ 15
Temperature compensation.......................................................... 16
Temperature compensation accuracy........................................... 16
Measurement range selection....................................................... 16
Connecting the test unit................................................................. 17
Shielding........................................................................................ 18
Signal lamp for line resistance RL.................................................. 18
Range transgression..................................................................... 19
RS232 output................................................................................ 19
Special interferences in the case of cable drums.......................... 19
Test units with a large inductive proportion................................... 20
Calibration..................................................................................................... 21
Test and offset instructions........................................................................ 23
RS232 data output........................................................................................ 27
Pin assignment and configuration................................................ 27
Protocol description....................................................................... 28
Instructions for identification and protocol parametrization........... 31
Instructions for requesting measurement values and
identifying faults............................................................................. 36
Instructions for device control........................................................ 39
Sample program for IBM-PC......................................................... 43
Schaltungsunternlagen and Accessories.................................................. 45
Circuit diagram................................................................... 45
Accessories................................................................................... 49
Calibration resistor..........................................................................49
Clamping device............................................................................ 51
Kelvin test tongs/testprobes.......................................................... 53
Overview of contents