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B - Verification and Calibration
Current Measurement (Low Range)
Action
7.
Turn off and connect the dc source as shown in Figure B-1B using
the 400 ohm load resistor. Set the DMM to operate in current
mode.
8.
Turn on the dc source, access the Input menu, and set the current
range to LOW.
9.
Set the output voltage to 0 V and the current 3 A. Press Output
On/Off to enable the output.
10.
Note the current reading on the DMM (Iout). Record the current
reading on the front panel display.
11.
Set the output voltage to 8 volts.
12.
Note the current reading on the DMM (Iout). Record the current
reading on the front panel display.
Current Sink Measurement
Action
13.
Turn off the dc source and connect an external supply to the output
of the unit as shown in figure B-1C using the 400 ohm load
resistor. Set the DMM to operate in current mode.
14.
Turn on the dc source, access the Input menu, and set the current
range to LOW.
15.
Access the Input menu and set the current sense detector to DC.
Turn on the external supply and program it to 8 volts and 5 A.
16.
Program the dc source to 0 V and 1 A.
Press Output On/Off to enable the output.
17.
Note the current reading on the DMM (Iout). Record the current
reading on the front panel display.
18.
Access the Input menu and set the current range to HIGH.
19.
Short out the load resistor by connecting a jumper across it.
20.
Note the current reading on the DMM (Iout). Record the current
reading on the front panel display.
126
Normal Result
CURR:RANG LOW
Output current near 0 A.
Reading within low current
measurement (see table B-2).
Output current near +20 mA.
Reading within high current
measurement (see table B-2).
Normal Result
CURR:RANG LOW
CURR:DET DC
Output current near −20 mA.
Reading within low current sink
measurement (see table B-2).
CURR:RANG HIGH
Output current approx. −2 A
Reading within high current sink
measurement (see table B-2).
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