Agilent Technologies 654 A Series User Manual

Calibration
65
Table A-2. Typical Calibration Procedure
Action Display
Response
Enabling the Calibration Mode
1. Begin calibration by pressing .
2. Enter calibration password from Entry keypad.
If password is correct the Cal annunciator will come on.
If password is incorrect, an error occurs.
2
Note: The initial (factory-default) password is the model number of the power supply, but it can be
changed (see “Changing the Password”).
PASWD
1
PASSSWD ERROR
Entering Voltage Calibration Values
1. Make certain the DVM is the only load on the power supply.
2. Select the first calibration point by pressing .
If the power supply is not in CV mode, an error occurs.
3. Read the DVM and use the Entry keypad to enter the first voltage value.
4. Select the second calibration point by pressing again.
5. Read the DVM and use the Entry keypad to enter the second voltage value.
Note: If one of the entered values is not within acceptable range, an error occurs. The power supply
is now holding the new voltage calibration constants in RAM.
(Meter mode)
VRDG1
WRONG MODE
(Meter mode)
VRDG2
(Meter mode)
CAL ERROR
Calibrating the OVP Trip Point
1. Make certain the voltage has been calibrated and there is no load on the power supply.
2. Select OVP calibration by pressing .
3. Wait for the power supply to compute the OVP calibration constant.
If the supply goes unregulated or into CC mode during OVP calibration, an error occurs.
If the computed constant is out of acceptable range, an error occurs.
The power supply is now holding the new OVP calibration constant in RAM.
(Meter mode)
OVPCAL
CAL COMPLETE
N0T CV M0DE
DOES NOT CAL
Entering Current Calibration Values
1. Make certain appropriate shunt resistor (see Table A-1) is the only load on the power supply.
2. Select the first calibration point by pressing .
If the power supply is not in CC mode, an error occurs.
3. Read DVM and compute the first current value (DVM reading divided by shunt resistance).
(Wait for DVM reading to stabilize).
4. Use Entry keypad to enter the first current value.
5. Select second calibration point by pressing again.
6. Read DVM and compute the second current value (DVM reading divided by shunt resistance).
(Wait for DVM reading to stabilize)
7. Use Entry keypad to enter the second current value.
Note: If one of the entered values is not within acceptable range, an error occurs.
The power supply is now holding the new current calibration constants in RAM.
(Meter mode)
IRDG1
WR0NG M0DE
(Meter mode)
(Meter mode)
IRDG2
(Meter mode)
(Meter mode)
CAL ERROR
1
If CAL DENIED appears, then an internal jumper has been set to prevent the calibration from being changed.
(See the Service Manual.)
2
If the active password is lost, the calibration function can be recovered by moving an internal jumper that defeats
password protection. However, this also will change all calibration constants to their factory-default values. (For
more information, see the Service Manual.)
Note If you want to operate without requiring any password, change the password to 0 (zero).

Agilent Technologies 654 A Series Specifications

General

Brand	Agilent Technologies
Model	654 A Series
Category	Power Supply
Language	English