Fluke NetDAQ 2640A, Service Manual

Page: 158 / 260

NetDAQ
Service Manual
4-36
6. Press the <Enter> key a few times and notice the => returns, indicating a successful
connection (see below). If you do not receive these returns, the RS-232 link is not
operating. Check the communication parameter settings and cabling.
Manual Calibration Commands 4-42.
The calibration procedures are performed in the terminal mode using the commands
CAL, CAL?, CAL_REF, CAL_REF?, CAL_STEP, and CAL_CLR. Refer to Table 4-3
for information regarding these commands. After each command is entered, the terminal
returns one of three responses, as shown in Table 4-4.
Table 4-3. Calibration Commands
Command Description Cal Mode Only?
CAL x Start calibration of a new function, where x = an integer from
1 to 4. For example, CAL 1 for VDC calibration.
1 = VDC
2 = VAC
3 = Resistance
4 = Frequency
Yes
CAL? Return identifier of currently active calibration procedure. For
example, CAL? returns 2 for active calibration of the VAC
mode.
0 = No cal procedure currently active
1 = VDC
2 = VAC
3 = Resistance
4 = Frequency
Yes
CAL_REF <value> Calibrate to <value>, rather than the default calibration
reference value. Yes
CAL_REF? Return the present calibration reference. Yes
CAL_STEP? Calibrate and return the calibrated value of the input. Yes
CAL_CLR Reset all calibration constants to nominal values, clearing
present calibration. Use with caution. This clears all contents
for all functions, VDC, VAC, resistance, and frequency. Yes