Keysight N6705 - Page 73

Calibration 3
Model N6705 Service Guide 73
Current Limit – All Models
CAUTION
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:
SCPI Command:
From the Calibration menu, select
Current, Current Limit. Then select
Start.
For N6781A, N6782A, N6784A
CAL:CURR:LIM:POS 3, (@1
For N6785A, N6786A
CAL:CURR:LIM:NEG -8, (@1)
Step 3.
Select the first current calibration point.
Front Panel:
SCPI Command:
The first calibration point is automatically
selected. “Enter P1 measured data” should be
displayed.
CAL:LEV P1
*OPC?
Step 4.
Calculate the shunt current (I=V/R) and enter the data.
Front Panel:
SCPI Command:
Enter the calculated value into the data field
and then select Next.
CAL:DATA <data>
Step 5.
Select the second voltage calibration point. Wait 5 minutes for the
internal temperature to stabilize before continuing.
Front Panel:
SCPI Command:
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.
CAL:LEV P2
*OPC?
Step 6.
Calculate the shunt current (I=V/R) and enter the data.
Front Panel:
SCPI Command:
Enter the calculated value into the data field
and then select Next. When calibration is
complete, select Close.
CAL:DATA <data>