Service
Input Gain Calibration (Continued))
Example:
Input Type: 100 platinum/250
Measured Value of Calibration Resistor: 250.025
CALREAD? Reading: 250.145
Constant Calculation: 250.025 / 250.145 = 0.99952
Calibration Command: CALG 1,2,0.99952
10. Repeat for all input ranges.
11. Send the CALSAVE command to finalize the calibration.
5.6.3 Analog Output Calibration and Verification
The 211 has one analog output which requires calibration. Both the voltage
and current modes of the output need to be calibrated separately. Zero offset
and gain errors are calibrated out by programming offset and gain constants
to the instrument. Reference the CALZ and CALG commands and the
extended version of the ANALOG command in Paragraph 5.6.4.
5.6.3.1 Analog Output Voltage Mode Calibration
Purpose
To determine the analog output voltage mode offset and gain errors and
provide offset and gain calibration constants back to the 211.
Process
1. Reset the calibration constants to their default values using the CALZ
and CALG commands.
Example:
Zero Offset Reset Command: CALZ 2,0,0
Gain Reset Command: CALG 2,0,1
2. Connect the 100 k resistor standard to the analog output using only
the two voltage leads. Connect the positive lead of the DMM to the
analog output positive terminal, the negative lead is connected to the
analog output negative terminal.
3. Set the analog output to manual mode, manual output of 0%.
Example:
Manual Zero Voltage Command: ANALOG 4,0
4. Read the output voltage with the DMM and record this zero output
(ZERO) value.
5. Set the analog output to +100%.
Example:
Manual + FS Voltage Command: ANALOG 4,2
6. Read the output voltage with the DMM and record this positive full
scale (+FS) value.
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