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5 Verification and Calibration
Channel Calibration
IMPORTANT Remove all connections from the CAL connector on the rear panel of the
BT2152A/B before performing the transfer calibration.
Channels should be calibrated on a regular interval as determined by the
During channel calibration, each individual channel is sequentially connected to the internal reference
and gain and offset corrections are calculated and stored in non-volatile memory.
Prerequisites
The unit must pass self-test, which is run at the start of channel calibration. If self-test (*TST?) does
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not pass, channel calibration (*CAL?) will abort.
The unit must be warmed up. A warm up time of 1 hour is required before the unit can be calibrated.
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The front panel Ready light must be green, otherwise *CAL? will abort.
The unit must stay within its temperature limits. If the unit exceeds the limits, *CAL? will abort.
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Running Channel Calibration
Send
*CAL?
This calibration is automatic and takes up to 1 hour.
The front panel Test light flashes orange when channel calibration is running. The Test light turns off
when calibration is complete.
If Problems Occur with Channel Calibration
If the calibration value of a specific channel is out of the accepted tolerance, that channel will fail. The
remaining channels will continue to calibrate, with the calibration results being stored when
calibration completes.
An error will be placed in the error queue with the channel number that failed, along with
measurement information detailing the issue. Use
Error Messages
for more information.
Aborting Channel Calibration
If you need to abort channel calibration, either press the Stop button on the front panel for one
second, or send a device clear.
The Test light turns off when channel calibration stops.
You can also query the status register using a different connection and check when the cal bit
returns to 0. If you are using the LAN interface for example, you can query the status register
using the USB interface.
118
maintenance
SYSTem:ERRor?
to read the error queue. See
Keysight BT2152A/B Operating and Service Guide
schedule.
SCPI
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