Wavelength Electronics LFI-3751, User Manual

Page: 111 / 132

4
111
Calibrating the 10 mA Reference Current
•
If the instrument’s 10 mA reference current is actually 10.262 mA, send
the following Command Packet to properly calibrate the unit.
Write
!010.26223
( [10 mA BIAS CAL] in mA)
Calibrating the 10 k
Ω
Resistance (for AD590)
•
If the instrument’s 10 k
Ω
resistance is actually 10.003 k
Ω
, send the
following Command Packet to properly calibrate the unit.
Write
!010.00327
( [AD590 10 k
Ω
CAL] in k
Ω
)
Reading the Sensor Bias Current and AD590 Sense
Resistance Settings
•
To read the sensor bias and AD590 sense resistance settings, the
Command Type changes from a WRITE (2) to a READ (1) and no
[PASSWORD] is required:
Read
!000.00022
(Reads [10
µ
A BIAS CAL] in
µ
A )
!000.00021
(Reads [100
µ
A BIAS CAL] in
µ
A )
!000.00020
(Reads [1 mA BIAS CAL] in mA )
!000.00027
(Reads [10 mA BIAS CAL] in mA )
!000.00026
(Reads [AD590 10 k
Ω
CAL] in k
Ω
)
Chapter 4 - Remote Interface Reference
Calibration - Sensor Bias Current and AD590 Sense Resistance
RS-232
Commands Discussed:
[10 mA BIAS CAL]
[AD590 10 k
Ω
CAL]