HP 6633B - Manual (Page 60)

B - Verification and Calibration
60
Front Panel Calibration
These procedures assume you understand how to operate front panel keys (see chapter 5).
Enable Calibration Mode
Action Display
1. Reset the unit by selecting Output, scrolling to *RST and pressing
Enter. *RST
2. Press Output On/Off to enable the output. 00.003V 0.0006A
3. To begin calibration press Shift Cal, scroll to CAL ON and press
Enter. CAL ON 0.0
4. Enter the calibration password from Entry keypad and press Enter.
lf the password is correct the Cal annunciator will come on.
If CAL DENIED appears, then an internal switch has been set to
prevent the calibration from being changed. (See the Service
Manual.)
lf the password is incorrect, an error occurs. If the active password is
lost, the calibration function can be recovered by setting an internal
switch that defeats password protection. (See the Service Manual.)
CAL DENIED
OUT OF RANGE
Voltage Programming and Measurement Calibration
Action Display
5. Connect the DMM (dc volts mode) directly to the dc source. Do not
connect the load resistor or current shunt.
6. Press Shift Cal, scroll to CAL VOLT, and press Enter. CAL:VOLT
7. Press Shift Cal, scroll to CAL LEV, and press Enter to select the
first calibration point. CAL:LEV P1
8. Press Shift Cal, scroll to CAL DATA, and use the Entry keypad to
enter the voltage value displayed on the DMM. CAL:DATA 0.00
9. Press Shift Cal, scroll to CAL LEV, use ä to scroll to P2 (the
second calibration point), and press Enter. CAL:LEV P2
10. Press Shift Cal, scroll to CAL DATA, and use the Entry keypad to
enter the second voltage value displayed on the DMM. CAL:DATA 0.00
Overvoltage Protection Calibration
Action Display
11. Press Shift Cal, scroll to CAL VOLT PROT, and press Enter. CAL:VOLT:PROT
12. Wait for the dc source to compute the OVP calibration constant.
The display returns to Meter mode when the calculation is
complete.