Hazardous voltages may be present on all output and guard terminals. To prevent electrical
shock that could cause injury or death, never make or break connections to the 2600B while
the instrument is powered on. Turn off the equipment from the front panel or disconnect the
main power cord from the rear of the 2600B before handling cables. Putting the equipment
into standby does not guarantee that the outputs are powered off if a hardware or software
fault occurs.
Setting the source range and output value
Before testing each calibration point, you must properly set the source range and output value.
To set the source range and output value:
1. Press the SRC key to select the appropriate source function.
2. Press the navigation wheel to enable the edit mode (EDIT indicator on).
3. When the cursor in the source display field is flashing, set the source range to the range being
calibrated. Use the up or down RANGE keys to select the range.
4. Use the navigation wheel and CURSOR keys to set the source value to the required value.
5. Press the navigation wheel to complete editing.
Setting the measurement range
When simultaneously sourcing and measuring either voltage or current, the measure range is coupled
to the source range, and you cannot independently control the measure range. Thus, it is not
necessary for you to set the range when testing voltage or current measurement accuracy (on
page 10-9).
Current source accuracy
Follow the steps below to verify that the 2600B output current accuracy is within specified limits.
An alternate procedure for 100 nA current accuracy is shown in the 1 nA to 100 nA Output current
accuracy procedure for the 2634B, 2635B, or 2636B.
1. With the power off, connect the digital multimeter to the 2600B terminals as shown in the figure
titled "Connections for 100 nA to 1 A current ranges" located at the end of this procedure.
2. Select the multimeter dc current measuring function.
3. Select the Model 2602B, 2604B, 2612B, 2614B, 2634B, or 2636B single-channel display mode.
4. Press the SRC key to source current, and make sure the source output is turned on.
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