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Command
Sequence
CALibration:TARE:RESet
Chapter 6
•
If Open TransducerDetect (OTD) is enabled when CAL:TARE is executed, the
module will disable OTD, wait 1 minute to allow channels to settle, perform
the calibration, and then re-enable OTD. If your program turns off OTD before
executing CAL:TARE, it should also wait 1 minute for settling.
•
The maximum voltage that CAL:TARE can compensate for is dependent on
the range chosen and SCP gain setting. The following table lists these values.
A/D range
±V F.Scale
16
4
1
.25
.0625
•
Channel offsets are compensated by the CAL:TARE command even when not
stored in the Flash Memory. There is no need to use the CAL:STORE TARE
command for channels which are re-calibrated frequently.
•
The HP E1415's Flash Memory has a finite lifetime of approximately ten
thousand write cycles (unlimited read cycles). While executing CAL:STOR
once every day would not exceed the lifetime of the Flash Memory for
approximately 27 years, an application that stored constants many times each
day would unnecessarily shorten the Flash Memory's lifetime. See Comments
below.
•
Executing CAL:TARE sets the Calibrating bit (bit 0) in Operation Status
Group. Executing CAL:TARE? resets the bit.
•
When Accepted: Not while INITiated
•
Related Commands: CAL:TARE?, CAL:STOR TARE
•
*RST Condition: Channel offsets are not affected by *RST.
CAL:TARE < ch_list >
CAL:TARE?
CAL:STORE TARE
CALibration:TARE:RESet
64 channels. Executing CAL:TARE:RES affects the tare cal constants in RAM only.
To reset the tare cal constants in Flash Memory, execute CAL:TARE:RES and then
execute CAL:STORE TARE.
Maximum CAL:TARE Offsets
Offset V
Offset V
Offset V
Gain x1
Gain x8
Gain x16
3.2213
.40104
.20009
.82101
.10101
.05007
.23061
.02721
.01317
.07581
.00786
.00349
.03792
.00312
.00112
to correct channel offsets
to return the success flag from the
CAL:TARE operation
Optional depending on necessity of long
term storage
resets the tare calibration constants to zero for all
HP E1415 Command Reference
CALibration
Offset V
Gain x64
.04970
.01220
.00297
.00055
n/a
191
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