Keysight N6705 Service Manual page 73

CAUTION
Model N6705 Service Guide
Current Limit – All Models
This procedure calibrates the POSITVE current limit for Models N6781A,
N6782A, and N6784A. It calibrates the NEGATIVE current limit for
Models N6785A and N6786A.
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 rated full-scale
current (see Cal Setup B). Connect the Keysight 3458A across the shunt
resistor.
Step 2. Select the 3 A current limit of output 1 for models N6781A, N6782A, and
N6784A. Select the -8A current limit of output 1 for models N6785A and
N6786A.
Front Panel:
From the Calibration menu, select
Current, Current Limit. 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.
Step 5. Select the second voltage calibration point. Wait 5 minutes for the
internal temperature to stabilize before continuing.
Front Panel:
The second calibration point is automatically
selected. "Wait 5 minutes, press Next" should
be displayed. Wait 5 minutes and select Next.
"Enter P2 measured data" should be displayed.
Step 6. 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. When calibration is
complete, select Close.
Calibration
SCPI Command:
For N6781A, N6782A, N6784A
CAL:CURR:LIM:POS 3
For N6785A, N6786A
CAL:CURR:LIM:NEG -8
SCPI Command:
CAL:LEV P1
*OPC?
SCPI Command:
CAL:DATA <data>
SCPI Command:
CAL:LEV P2
*OPC?
SCPI Command:
CAL:DATA <data>
3
, (@1
, (@1)
73