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Teledyne API T703/T703U Calibrator Operation Manual Operating the Calibrator
81
4.9.2. TEST CHANNEL CALIBRATION
TEST CHANNEL calibration needs to be carried out on first startup of the instrument
(performed in the factory as part of the configuration process) or whenever re-calibration
is required. The analog outputs can be calibrated automatically or adjusted manually. In
its default mode, the instrument is configured for automatic calibration of all channels,
which is useful for clearing any analog calibration warnings associated with channels
that will not be used or connected to any input or recording device, e.g., datalogger.
During automatic calibration, the instrument tells the output circuitry to generate a zero
mV signal and high-scale point signal (usually about 90% of chosen analog signal scale)
then measures actual signal of the output. Any error at zero or high-scale is corrected
with a slope and offset.
Manual calibration should be used for the 0.1V range or in cases where the outputs must
be closely matched to the characteristics of the recording device. Manual calibration
requires the AUTOCAL feature to be disabled.
Automatic calibration can be performed via the AOUTS CALIBRATION command, or
by using the CAL button located inside TEST_CHANNEL submenu. By default, the
instrument is configured so that calibration of TEST CHANNEL can be initiated with
the AOUTS CALIBRATION command.
07223C DCN6572