Keysight N6705 Service Manual page 56

3 Calibration
Voltage Common Mode Rejection Ratio Calibration
Current Calibration
56
Step 1. For this step, make the connections shown in Cal Setup C.
Connect an external jumper between the +sense and the −sense
terminals. Connect a second jumper from the +output to the −sense
terminal. For models N6761A and N6762A only, connect a 25 Ω load
resistor across the +output and –output terminals.
This procedure is automatic and only takes a few seconds.
Front Panel:
From the Calibration menu, select
Miscellaneous, Common Mode Rejection
Ratio, then Start. Then select Close.
After calibration completes, disconnect all jumpers and resistors.
High Range Programming and Measurement
The output voltage may go negative at some point during this procedure
on units that have polarity reversal relays (Option 760).
Step 1. Connect a precision shunt resistor to the output. The shunt resistor
should be able to measure at least 120% of the output's full-scale
current (see Cal Setup B). Connect the Keysight 3458A across the shunt
resistor.
Step 2. Select the full-scale current programming range. The value to program a
range must be the maximum current of the range. This example selects
the 3 A full-scale range of output 1. Full-scale ranges vary according to
model.
Front Panel:
From the Calibration menu, select Current,
High Range Prog and Meas. Then select Start.
Step 3. Select the first current calibration point.
Front Panel:
The first calibration point is automatically
selected. "Enter P1 measured data" should be
displayed.
Step 4. Calculate the shunt current (I=V/R) and enter the data.
Front Panel:
Enter the calculated value into the data field
and then select Next.
SCPI Command:
CAL:VOLT:CMRR
(@1)
*OPC?
SCPI Command:
CAL:CURR 3
, (@1)
SCPI Command:
CAL:LEV P1
*OPC?
SCPI Command:
CAL:DATA <data>
Model N6705 Service Guide