I N T R O D U C T I O N A N D S P E C I F I C A T I O N S
Installing the LDC-3700B
7/01
LDC-3700 Series
5
C H A P T E R
1
Table 1.1
Temperature Controller Specifications
1
1. All values relate to a one−hour warm−up period.
Temperature Control Output
Temperature Control Range:
2
2. Software limits of range. Actual range possible depends on the physical load, thermistor type, and TE module used.
−100.0 °C to +199.9 °C
Thermistor Set point Resolution and Accuracy:
−20 °C to 20 °C
20 °C to 50 °C
Resolution:
0.1 °C
0.2 °C
Accuracy
3
:
±0.2 °C
±0.2 °C
3. Accuracy figures are quoted for a typical 10 kW thermistor and 100 mA Current setting. Accuracy figures are relative to the calibration
standard. Both resolution and accuracy are dependent upon the user−defined configuration of the instrument.
AD590 & LM335 Set point:
4
−20 °C to 50 °C
4. Accuracy depends on the sensor model selected, the calibration standard, and the user−defined configuration of the instrument.
0.01 °C
±0.1°C
Short Term Stability (1 hr.):
5
5. Over any 1−hour period, half−scale output, controlling an LDM−4412 mount @ 25° C, with 10 kW thermistor, on 100 mA setting.
<0.004 °C
Long Term Stability (24 hrs.):
6
6. Over any 24−hour period, half−scale output, controlling an LDM−4412 mount @ 25° C, with 10 kW thermistor, on 100 mA setting.
<0.01 °C
Output Type:
Bipolar, constant current source
Compliance Voltage:
>4 V DC
Short Circuit Output Current:
4 Amps
Maximum Output Power:
16 Watts
Current Noise and Ripple:
7
<1 mA rms
Current Limit Range:
0−4 Amps
Current Limit Set Accuracy:
±0.05 Amps
Control Algorithm:
Smart Integrator, Hybrid PI
Temperature Sensor
Types:
Thermistor:
IC Temperature Sensor:
RTD Sensor:
8
NTC (2−wire)
AD590/LM335
Pt100/Other 100−ohm RTD
Thermistor Sensing Current:
10
µ
A/100
µ
A
Sensor Bias:
AD590 = 8V, LM335 = 1 mA, RTD=0.8 mA
8
Useable Thermistor Range:
25−450,000
Ω
, typical
Typical Sensor Output
9
AD590 Current Output:
LM335 Voltage Output:
RTD (P
t
100) Resistance:
I(25 °C) = 298.2
µ
A, It = 1
µ
A/K
V(25 °C) = 2.73 V, Vt = 10
µ
V/K
R(25 °C)=109.73
Ω
User Calibration:
Thermistor: Steinhart−Hart, 3 constants
IC Sensors, RTD = Two−point
TEC Measurement (display)
Temperature:
10 mA Setting:
10
100
µ
A Setting:
11
Range
12:
−99.9 °C to 199.9 °C
−99.9 °C to 199.9 °C
Resolution:
0.01 °C
0.01 °C
Accuracy:
±0.1 °C
±0.05 °C
Thermistor Resistance
10
µ
A Setting:
100
µ
A Setting:
0.01−450.00 k
Ω
0.001−45.000 k
Ω
0.01 k
Ω
0.001 k
Ω
±0.05%
±0.05%
TE Current:
−4.000 A to 4.000 A
0.001 A
±0.04 A
Voltage (Remote only):
13
−10.000 V to 10.000 V
1 mV
±30 mV
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