Fluke 2680A Service Manual page 141

Command Response
CAL 1
CAL_REF? +90.0000E-3
CAL_STEP? +90.0000E-3
CAL_REF? +300.000E-3
CAL_STEP? +300.000E-3
CAL_REF? +750.000E-3
CAL_STEP? +750.000E-3
CAL_REF? +3.00000E+0
CAL_STEP? +3.00000E+0
CAL_REF? +30.0000E+0
CAL_STEP? +30.0000E+0
CAL_REF? +300.000E+0 (PAI)
+50.0000E+0 (FAI)
CAL_STEP? +300.000E+0 (PAI)
+50.0000E+0 (FAI)
4. Resolve any calibration problems based on the following:
An execution error !> is returned by the CAL_STEP? command if the full scale
measurement is off by more than 5% from the target or if the zero measurement
is off by more than 1% of full scale from the target. When an error is detected,
the cal constant is not updated, and the procedure remains at the same step.
When CAL_STEP? reports an execution error !> due to an out-of-range
measurement, it returns the raw measured reading to give you an indication of
what was measured. When CAL_STEP? completes successfully, it returns the
reference value.
If CAL_STEP? returns an execution error !> while measuring the short circuit on
channel 2, the procedure freezes at the internal step that measures the short. This
way, you can send a CAL_REF? command and it will return 0 V, indicating that
the problem was probably caused by a misapplied short on channel 2.
A device-dependent error is returned by the CAL_STEP? command if an internal
error such as a measurement timeout is detected. When an error is detected, the
cal constant is not updated, and the procedure remains at the same step.
An execution error !> is returned by the CAL_REF command if the specified
reference is less than 33% of full scale or greater than 100% of full scale.
Table 5-4. Manual V DC Calibration
=> Puts 268XA in V dc calibration.
Use the 5700A to source 90 mV dc.
268XA computes the calibration constant and returns the
calibrated reading. Allow several seconds.
Use the 5700A to source 300 mV dc.
268XA computes the calibration constant and returns the
calibrated reading. Allow several seconds.
Use the 5700A to source 750 mV dc.
268XA computes the calibration constant and returns the
calibrated reading. Allow several seconds.
Use the 5700A to source 3 V dc.
268XA computes the calibration constant and returns the
calibrated reading. Allow several seconds.
Use the 5700A to source 30 V dc.
268XA computes the calibration constant and returns the
calibrated reading. Allow several seconds.
Use the 5700A to source +300 V dc (PAI).
Use the 5700A to source +50 V dc (FAI).
268XA computes the calibration constant and returns the
calibrated reading. Allow several seconds.
Manual Calibration Commands
Action
Calibration
5
5-11