2-21
Step 9: Humidity Calibration
Perform the steps below to calibrate the Model 6517A
humidity function. These steps are summarized in Table
2-15.
1. Connect the DC voltage calibrator to the rear panel
HUMIDITY jack (see Figure 2-8).
2. Set the DC calibrator output to 0.00000V, then send the
following command over the bus:
:CAL:PROT:HUMZER0
3. Repeat steps 2 and 3 for 0.5V and 1V input using the
calibrator voltages and commands summarized in Table
2-15.
Step 10: Program Calibration Dates
To set the calibration date and next due date, use the follow-
ing commands to do so:
:CAL:PROT:DATE <yr>, <mon>, <date> (calibration date)
:CAL:PROT:NDUE <yr>, <mon>, <date> (next calibration due
date)
Note that the year, month, and date must be separated by
commas. The allowable range for the year is from 1994 to
2093, the month is from 1 to 12, and the date is from 1 to 31.
Step 11: Save Calibration Constants
Calibration is now complete, so you can store the calibration
constants in EEPROM by sending the following command:
:CAL:PROT:SAVE
NOTE
Calibration will be temporary unless you
send the SAVE command.
Step 12: Lock Out Calibration
To lock out further calibration, send the following command
after completing the calibration procedure:
:CAL:PROT:LOCK
2.10 Single-point calibration
Normally, the complete comprehensive calibration proce-
dure should be performed to ensure that the entire instrument
is properly calibrated. In some instances, however, it may be
desirable to calibrate only certain ranges or functions. For
those cases, a single-point calibration feature is included in
the Model 6517A.
The following paragraphs give an overview of performing
single-point calibration, both from the front panel and over
the IEEE-488 bus. For details on specific procedures and test
equipment connections, refer to paragraphs 2.8 and 2.9 of
this section. For comprehensive information on IEEE-488
bus calibration commands, see Section 3.
Remember that calibration must first be unlocked. To unlock
comprehensive calibration, press in on the CAL switch.
2.10.1 Front panel single-point calibration
Front panel single-point calibration can be performed by
using the POINT-CALS selection in the CALIBRATION
menu. You will then be prompted as to which function to cal-
ibrate using the following menu:
VOLTS AMPS CHARGE V-SOURCE
EXT-TEMP HUMIDITY ZEROCHECK
If you choose VOLTS, AMPS, or CHARGE, you can then
choose whether to calibrate all ranges for that function, or
just a single range. For example, the menu selections for the
volts function include:
CHOOSE VOLTS RANGE
ALL 2V 20V 200V
With the ALL selection, all steps for that function will be car-
ried out without duplicating the zero calibration step for that
range. See paragraph 2.8 for details on front panel compre-
hensive calibration steps.
Once you have calibrated all desired functions and ranges,
exit the calibration menu by pressing the EXIT key. You will
then be prompted as to whether or not the new calibration
points are to be saved. To make changes permanent, save cal-
ibration; however, choose not to save calibration if you wish
calibration to be only temporary.
Example
Assume that you wish to calibrate the volts function. Follow
the steps below to do so:
Table 2-15
IEEE-488 bus humidity calibration summary
Calibration
point
Calibrator
voltage
Calibration command
0V (0% RH)
0.5V (50% RH)
1V (100% RH)
0.00000V
0.50000V
1.00000V
:CAL:PROT:HUMZERO
:CAL:PROT:HUM05
:CAL:PROT:HUM1