E
Enabling
automatic input impedance, 100 autorange
dc voltage measurements, 150 frequency measurements, 130 period measurements, 138 resistance measurements, 142
autozero, 83, 152, 197 math function, 78
Errors
ac current measurement, 36 ac turnover, 35
burden voltage, 36 calculate total measurement, calibration errors, 190– 191 common mode, 35
crest factor, 33, 180 dc measurement, 32 execution errors, 185– 188 field wiring resistance, 30 frequency measurement, 36
high resistance measurements, 31 leakage current, 26
loading (ac volts), 34 loading (dc volts), 26
noise, 28
offset voltage, 28 overload, 34
period measurement, 36 queue, 155
range error, 180 reading error, 180
*ESE, 163 *ESE?, 163 *ESR?, 164
Example Programs
C programming language, 52 hardware used, 53
HP VEE programming example, 64 making a single measurement, 54 making external trigger measurements, 54 maximizing accuracy, 56
maximizing measurement speed, 55 monitoring for limit test failure, 63 monitoring for message available (MAV bit), 62 monitoring for operation complete (OPC bit), 61 multimeter
setting sample count, 51 setting trigger count, 49 setting trigger delay, 49 status system example, 60– 63 synchronizing with switch module, using math operations, 59
Visual Basic programming language, 52 visual engineering environment (VEE), 64 VXIplug&play
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Execution Errors,
External Trigger measurements, 54 source, 46– 47, 160
trig input requirement, 47
VM Complete output signal, 47
F
FETCh? Command, 98, 198
Field Wiring Resistance, 30 Filters, ac signal, 36– 37, 127– 128 Frequency
aperture time, 128 characteristics, 177– 178 function, 89, 104
gate time, 128
measurement connections, 19 measurement errors, 36 voltage range, 129– 130
Front Panel Indicators, 18 Function Changes
increasing measurement speed, 193– 198 Function Commands, special, 193– 198 Function Reference (VXIplug&play)
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