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
148
LDC-3700C Series
C H A P T E R
5
AD590 Sensor Calibration
The following procedure is for calibrating the AD590 sensor so that the
temperature measurement will be as accurate as possible.
1
Set the SENSOR SELECT switch (back panel) to the AD590 position, TEC display code
is --04.
2
Connect a precision 16.8 k
(metal film) resistor and multimeter in series at the sensor
input of the Temperature Controller 15 pin connector on the rear panel. Configure the
multimeter to measure current in µA.
3
Enter the
TEC:CAL:SENsor
command over the GPIB. The TEC display will show the
current value in µA (not annunciated).
4
Input the actual current measured by the external ammeter (as an
<nrf value>
) via the
TEC:R <nrf value>
command.
If this value is to be measured and entered remotely via a GPIB controlled DMM, for
example, the measured value of the current should not be entered until the LDC-3700C
Series Laser Diode Controller is ready to receive it. The Controller will be ready to receive
the measured value when, after a
TEC:CAL:SEN?
query is sent, the response from the
Controller is "1".
5
Once the
TEC:R
value is sent, the Controller will return to its former state (before
calibration). The
*OPC?
query may be used (after the
TEC:R
value is sent) to determine
when the calibration is completed.
LM335 Sensor Calibration
The following procedure is for calibrating the LM335 sensor so that the measured
temperature will be as accurate as possible. This procedure is for remote
operation through the GPIB Interface.
1
Set the SENSOR SELECT switch (back panel) to the LM335 position, TEC display code
is --03.
2
Connect a precision 6.8 k
(metal film) resistor and the multimeter in parallel to the
sensor input of the Temperature Controller 15 pin connector on the rear panel. Configure
the multimeter to measure voltage in mV.
3
Enter the
TEC:CAL:SENsor
command over the GPIB. The TEC display will show the
voltage in mV (not annunciated).
4
Input the actual voltage measured by the multimeter (as an <nrf value>) via the
TEC:R
<nrf value>
command.
If this value is to be measured and entered remotely via a GPIB controlled DMM, for
example, the measured value of the voltage should not be entered until the Controller is
ready to receive it. The Controller will be ready to receive the voltage value when, after a
TEC:CAL:SEN?
query is sent, the response from the Controller is "1".
5
Once the
TEC:R
value is sent, the Controller will return to its former state (before
calibration). The
*OPC?
query may be used (after the
TEC:R
value is sent) to determine
when the calibration is completed.
Summary of Contents for LDC-3700C Series
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Page 8: ...L I S T O F FIG U R E S vi LDC 3700C Series...
Page 10: ...L I S T O F TA B L E S viii LDC 3700C Series...
Page 78: ...RE M O T E O PE R A T I ON Command Syntax 62 LDC 3700C Series C H A P T E R 3...
Page 150: ...C O M M A N D RE F E R E N C E Command Reference 134 LDC 3700C Series C H A P T E R 4...