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B - Performance, Calibration, and Configuration
158
Output 1 Current Programming and 3A-Range Measurement Calibration
NOTE: When performing a 3A-Range current calibration, you must also calibrate the 1A range,
the 0.02A range, and the ac current measurement.
Action Display
17. Connect the appropriate current monitor to the output terminals of output 1.
Connect the DMM (in voltage mode) across the current shunt. Select output 1.
18.
Press Shift Cal, scroll to CAL CURR, and press Enter.
CAL:CURR
19.
Press Shift Cal, scroll to CAL LEV, and press Enter to select the first
calibration point.
CAL:LEV P1
20.
Press Shift Cal and scroll to CAL DATA. Wait for the DMM reading to
stabilize. Then read the DMM and compute the first current value (DMM
reading ÷ shunt resistance). Press Enter Number and enter the first current
value in amperes. Press Enter.
CAL:DATA 0.00
21.
Press Shift Cal, scroll to CAL LEV, use & to scroll to P2 (the second
calibration point), and press Enter.
CAL:LEV P2
22.
Press Shift Cal and scroll to CAL DATA. Wait for the DMM reading to
stabilize. Then read the DMM and compute the second current value (DMM
reading ÷ shunt resistance). Press Enter Number and enter the second current
value in amperes. Press Enter.
CAL:DATA 0.00
1A-Range Current Measurement Calibration
Action Display
23 Disconnect all loads from the dc source but leave the sense jumpers in
place. Do not connect any equipment to the output until after step #24.
24.
Press Shift Cal, scroll to CAL CURR MEAS R3, and press Enter.
CAL:CURR:MEAS:R3
25. Connect the external DMM (in current mode) directly to the output 1
terminals. The DMM must be capable of measuring up to 1A.
26.
Press Shift Cal, scroll to CAL LEV, and press Enter to select the first
calibration point.
CAL:LEV P1
27.
Press Shift Cal and scroll to CAL DATA. Wait for the DMM reading to
stabilize. Press Enter Number and enter the current reading displayed on
the DMM in amperes. Press Enter.
CAL:DATA 0.00
0.02A-Range Current Measurement Calibration
Action Display
28 Disconnect all loads from the dc source but leave the sense jumpers in
place. Do not connect any equipment to the output until after step #29.
29.
Press Shift Cal, scroll to CAL CURR MEAS LOW, and press Enter.
CAL:CURR:MEAS:LOW
30. Connect the 800 ohm calibration load resistor to output 1 as shown in figure
B-1c. Connect the external DMM (in current mode) in series with the load.
31.
Press Shift Cal, scroll to CAL LEV, and press Enter to select the first
calibration point.
CAL:LEV P1
32.
Press Shift Cal and scroll to CAL DATA. Wait for the DMM reading to
stabilize. Press Enter Number and enter the current reading displayed on
the DMM in amperes. Press Enter.
NOTE: You must convert the value on the DMM to amperes, otherwise an
error will occur.
CAL:DATA 0.00