Agilent Technologies L4400 manual Voltage Adjustments, CALibrationSECureSTATe 0, code

AL4451A and L4452A Calibration Procedures

Voltage Adjustments

1With the DMM disconnected from the L4451A, set the DMM to the 100V range or the lowest range that can measure 16V (do not use autorange).

2Short the inputs to the DMM. The DMM reading is the offset voltage for the selected range. If the DMM has “null” capability, turn it on at this time. Otherwise, record the offset which will be subtracted from the subsequent voltage measurements.

3Unsecure the instrument for calibration using the command:

CALibration:SECure:STATe 0, <code>

4Connect channel 1 of the L4451A to the DMM as shown in Figure A- 2. Set the DMM to measure DC volts.

5Refering to Table A- 3, set the first DAC calibration point using the command:

CALibration:BEGin:VOLTage 1, (@<channel>)

For channel 1, the command is executed as:

CALibration:BEGin:VOLTage 1, (@1001)

6Measure the DAC output on the DMM. Subtract the offset voltage measured in Step 2 from the reading. Write this value to the DAC using the command:

CALibration:POINt? <value>

Note the DAC output which is now calibration point 2 (Table A- 3). Subtract the offset voltage from the new DMM reading and write the value to the DAC as above.

7Repeat Step 6 until the nine voltage calibration points have been entered and measured. ”0” is returned after the last calibration point (point 9) indicating the end of the sequence.

8Separately connect L4451A channels 2, 3, and 4 to the DMM as shown in Figure A- 2. Repeat Steps 5 through 7 for each channel until calibration points 1 through 9 have been measured and entered.

258 L4400 User’s Guide