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
Calibration Overview
116
LDC-3700 Series
C H A P T E R
5
5
Press and hold in the (
PARAMETER
)
SET
switch and turn the
ADJUST
knob until the
TEC
display indicates the same resistance you recorded for the metal film resistor.
6
Release the (
PARAMETER
)
SET
switch to store the new value into non−volatile memory.
After the (
PARAMETER
)
SET
switch is released, the LDC−3700B Series Laser Diode
Controller will return to its former state (before calibration).
7
Switch the
SENSOR
SELECT
switch (back panel) to the 10 mA position, TEC display
code −−02, and repeat this procedure with the 100 k
Ω
resistor as the load at the
and Sensor − terminals.
AD590 Sensor Calibration
This procedure is for calibrating the AD590 sensor so that the temperature measurement is as
accurate as possible.
1
Set the
SENSOR
SELECT
switch (back panel) to the
AD590
position, the TEC display
code is −−04.
2
Connect a precision 16.8 k
Ω
(metal film) resistor and multimeter in series at the sensor
input of the Temperature Controller 15 pin connector on the rear panel, and
Sensor − terminals. Configure the multimeter to measure current in
µ
A.
3
Enter the TEC sensor calibration mode by pushing the (
GPIB
)
LOCAL
and (
TEC
DISPLAY
)
R
switches at the same time. The TEC display will become blank for 2
seconds, then the sensor code (
SENSOR
SELECT
switch position) value will be
displayed for 2 seconds. After this, the TEC display will indicate sensor reference current
in
µ
A
(not enunciated)
.
4
Press and hold in the (
PARAMETER
)
SET
switch and turn the
ADJUST
knob until the
TEC display indicates the same current as shown on the multimeter.
5
Release the (
PARAMETER
)
SET
switch to store the new value into non−volatile memory.
After the
SET
switch is released, the LDC−3700B Series Laser Diode Controller will return
to its former state (before calibration).
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