LDTProduct Features
High stability temperature control
within 0.01oC
Hybrid P-I control loop for fast
settling timeThree display modes provide easy
operation

Designed to be economical and flexible, the LDT-5412
Thermoelectric Temperature Controller offers a stable, low noise
bipolar output and is optimized for controlling the temperature oflaser diodes and photodetectors. The instrument controls anddisplays thermistor resistance while delivering bipolar current toa thermoelectric module. The unit’s hybrid proportional-integral
control loop offers fast settling times with a typical temperaturestability of 0.01oC.

Application flexibility through user
set control and limits
User selectable thermistor current

Low Cost, High Stability,
Thermoelectric Temperature Control

5412
Thermoelectric
Temperature
Controller

5412
Thermoelectric
Temperature
Controller

The intuitive front panel features a highly visible
LED display, which has three display modes for easy
operation: (1) Set Resistance, which displays thesetpoint resistance (temperature) level, (2) Actual
Resistance, which displays the actual resistanceof the thermistor sensor, and (3) TE Current, whichdisplays the drive current to the TE module.
Two visual fault indicators located on thefront panel provide immediate information of fault
conditions. The OPEN THERM indicator lights when
the connection to the thermistor sensor is open.
When this occurs, the unit’s output automaticallyshuts off. The LIMIT indicator lights whenever theoutput is actively limited to the user-set current limit
value.

Application Flexibility
The incorporation of user-selectable thermistor
source currents of 10 A and 100 A ensuresversatility over a wide range of temperatures andapplications. This allows the LDT-5412 to operateover a thermistor control range of 10 to 200 k.

For a typical 10k thermistor, this corresponds
to a temperature range of -20oC to 50oC. Othertemperature ranges are possible with different
thermistors.
The LDT-5412 allows the user to bypass theinternal set resistance function of the front panel knob
and externally connect a resistor of known value. Thisis convenient for reproducing the same temperature
quickly and accurately.
In addition, the LDT-5412 optimizes slew rate andsettling time. Adjustment is easy with the rear panel
GAIN control. For automated testing or to remotelycompute actual temperature, the LDT-5412 also offers
an analog voltage output that corresponds to thethermistor resistance.
The unit’s output can be current limited anywhere
within its 0-2A range by using the recessed front
panel LIMIT control knob. During operation, thethermoelectric module current is unconditionally held
to the set limit value, ensuring the TE module cannot
be over driven.

Specifications
OUTPUT
Output Type:
Current Range:
Compliance Voltage:

ORDERING INFORMATION
Bipolar current source-2 to 2A, floating>2V, DCDISPLAYType:

3.5 digit green LED

Maximum Reading:Resolution:
Accuracy (@ 25oC):

10A
100ATE Current
199.9 k19.99 k1.99A
0.1 k0.01 k0.01A+0.5 k+0. 05 k+0.05 A

10A
100A
100 kV10 kV
+5%+5%

GENERALAC Power:Size (HxWxD):
Weight:Operating Temperature:
Storage Temperature:Warm-Up:
Output Connector:
Reference Input:

Thermoelectric Temperature Controller(4W, includes on TS-510 Thermistor)
Low Cost TO-Can Laser Diode Mount
TE Controller / Unterminated Interconnect CableTE Controller / Laser Diode Mount Interconnect Cable
10k Calibrated Thermistor (+0.2oC)
10k Uncalibrated Thermistor (+1.5oC; -20oC to 50oC)
5k Uncalibrated Thermistor (+1.5oC; -45oC to 30oC)
20k Uncalibrated Thermistor (+1.5oC; -10oC to 70oC)
100k Uncalibrated Thermistor (+1.5oC; 10oC to 110oC)
Unipolar Heater Control Adapter

LDM-4405
CC-501S
CC-505S
TS-510TS-520TS-521TS-523TS-525
UCA-350

In keeping with our commitment to continuing improvement, ILX Lightwave reserves the right to change
specifications without notice or liability for such changes.

ACTUAL R MONITOR
Output:Accuracy:

LDX-5412

100-120, 220-240 VAC;
50/60 Hz267mm x 140mm x 66mm;
10.5” x 5.5” x 2.6”
1.8 kg (4.0 lbs.)
0oC to 50oC
-40oC to 70oC
1 hour, to rated accuracy
15-pin D-sub
BNC connector

Load Stability in Degrees C

LDT

Easy Operation

0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
-0.01
-0.02
-0.03
-0.04
-0.05
-0.06
-0.07
-0.08
-0.09
-0.10
04812162024

Time in Hours

With a typical drift within 0.01oC over a four-hour period, the LDT-5412
out performs similar thermoelectric temperature controllers.

For information call
P.O. Box 6310, Bozeman, MT 59771 • FAX: 406-586-9405

1-800-459-9459

www.ilxlightwave.com

International Inquiries: 406-556-2481
email: sales@ilxlightwave.com

REV04.042909