ILX Lightwave LDT-5900 Series User Manual page 141

01_10
C A L I B R A T I O N A N D T R O U B L E S H O O T I N G
6s Calculate, using Ohm's Law, the voltage drop corresponding to the UUT-measured
resistances.
for x = a & b
V
6t Calculate the 100 mA Sensor Voltage Measurement slope and offset using the
equations below:
m
vsens
b
vsens
6u Enable Cal Mode by entering the remote command MODE CAL.
6v Enter the new calibration values by using the command
CAL:SENsor:VOLTage:100UA m
6w Save the new values to flash memory by using the CAL:SAVE command.
6x Return to Sensor Mode by using the MODE SENSOR command.
6y Verify the correct storage of the calibration values by entering
CAL:SENsor:VOLTage:100UA?
6z Begin calibration of 1 mA thermistor current by selecting 1 mA thermistor current
from Sensor Parameter Menu. Connect 10
Connect the DMM across the resistor as well to measure voltage.
6aa Record voltage (V
sens3a
6ab Record UUT-measured resistance (R
6ac Replace 10 resistor with 1k resistor (R
resistor as measured by DMM.
6ad Record UUT-measured resistance (R
6ae Calculate, using Ohm's Law, the voltage drop corresponding to the UUT-measured
resistances.
for x = a & b
V
V
sens 2 x
R
2 x 2 x
R
sens 2 x
V V
sens 2 b sens 2 a
2
V V
2 b 2 a
V m V
2 sens 2 b vsens 2 2
, b
vsens2 vsens2
) across R as measured by DMM.
sens3a
) using the MEASure:SENsor? command.
3a
sens3b
) using the MEASure:SENsor? command.
3b
V
sens 3 x
R
3 x 3 x
R
sens 3 x
Ca libra t ion Procedure
b
.
resistor (R ) to sensor leads.
sens3a
) and record voltage (V
sens3b
5
C H A P T E R
) across
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