Specifications

verify their output values. These input channels will be not be affected by
CAL:TARE even if they are referenced in <ch_list>.
·
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. To keep the OTD current on while
CAL:TARE executes, the DIAG:CAL:TARE:OTD:MODE:STATE command
must be used to set this configuration.
·
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.
Maximum CAL:TARE Offsets
A/D range
± V F.Scale
Offset V
Gain x1
Offset V
Gain x8
Offset V
Gain x16
Offset V
Gain x64
16
4
1
0.25
0.0625
3.2213
0.82101
0.23061
0.07581
0.03792
0.40104
0.10101
0.02721
0.00786
0.00312
0.20009
0.05007
0.01317
0.00349
0.00112
0.04970
0.01220
0.00297
0.00055
n/a
·
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 VT1419’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.
Command
Sequence
CAL:TARE <ch_list> to correct channel offsets
CAL:TARE? to return the success flag from the
CAL:TARE operation
CAL:STORE TARE Optional depending on necessity of long
term storage
VT1419A Command Reference
CALibration
Chapter 6 213
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