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Chapter 6 Error Messages
Instrument Errors
303
Module not able to perform requested operation
A command was received which is not valid for the specified module.
This error is most commonly generated when you send a command
intended for the multifunction module to a switching module.
Not able to perform requested operation
305
The requested operation is not valid for the specified channel. You may
have tried to a configure a channel for current measurements (valid only
on channels 21 and 22 on the HP 34901A module). Or you may have
tried to configure scaling on a module that does not connect to the
internal DMM .
306
Part of a 4-wire pair
For 4-wire resistance measurements, the instrument automatically
pairs channel n with channel n+10 (34901A) or n+8 (34902A) to provide
the source and sense connections. To change the configuration on the
upper channel in a 4-wire pair, you must first reconfigure the lower channel
to a measurement function other than 4-wire resistance.
Incorrectly configured ref channel
307
For thermocouple measurements using an external reference, the
instrument automatically reserves channel 01 on the multiplexer in the
lowest slot as the reference channel. Before configuring a thermocouple
channel with an external reference, you must configure the reference
channel (channel 01) for a thermistor or RTD measurement.
This error is also generated if you change the function on the reference
channel (channel 01) after selecting the external reference source on a
thermocouple channel.
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