25
Calibration Procedure
Table B-1 lists the equipment required for calibration. Figure B-1 shows the test setup. The following
procedures assume you understand how to operate front panel keys (see chapter 4).
WARNING
LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH
on contact may result if the output terminals or circuits connected to the output are
touched when power is applied. These procedures must be performed by a qualified
electronics technician or engineer trained on this equipment.
Summary of Front Panel Calibration Menu
The Entry keypad is used for calibration functions.
Press this key to access the calibration menu.
Display
Command Function
CAL ON <value>
Turns calibration mode on when the correct password
value is entered.
CAL OFF
Turns calibration mode off
CAL:LEV <char>
Advance to next step in sequence (P1, P2, P3, or P4).
CAL:DATA <value>
Input a calibration measurement.
SHUNT <value>
Enter a value for the external current shunt in ohms.
CAL:VOLT:OFFSET
Begin voltage offset calibration
CAL:VOLT:DC
Begin dc voltage calibration sequence
CAL:VOLT:AC
Begin ac voltage calibration sequence
CAL:VOLT:PROT
Begin voltage protection calibration
CAL:VOLT:EXT
Begin external voltage calibration sequence
CAL:CURR:AC
Begin ac current calibration sequence
CAL:CURR:MEAS
Begin current measurement calibration sequence
CAL:CURR:EXT
Begin external current calibration sequence
CAL:IMP
Begin output impedance calibration sequence
CAL:SAVE
Saves the calibration constants in non-volatile memory.
CAL:PASS <value>
Set new calibration password.
Enable Calibration Mode
Action
Display
1.
Reset the unit by selecting
Shift
,
Output
, and pressing
Enter
.
*RST
2.
Press
Shift Calibration
, enter the calibration password from Entry keypad,
and press
Enter
. If the password is correct, the Cal annunciator will come on.
(If no password has been set, just press
Enter
.)
If 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.)
If CAL DENIED appears, then an internal switch has been set to prevent the
calibration from being changed (see the Service Manual.)
CAL ON 0.0
OUT OF RANGE
CAL DENIED
Cal
Shift
