ILX Lightwave LDC-3700 Series User Manual

3722B Teml)erature Control (continued)
Resolution and Accuracy24
Temperature
-20 "C
0 "C
20 OC
50 "C
LM335 Setting Accuracy
AD590 Setting Accuracy
Short Term StabilityZ5
Long Term Stability
Sensor Type
Usable Thermistor Range
LM 335 Voltage
LM335 Bias
AD590 Current
AD590 Bias
Thermistor Sensing Current
Temperature Calculation Methods
Thermistor:
Resolution Accuracy
fO.l
OC f0.2 OC
f0.l OC f0.2"C
fO.l OC
H.2 "C
H.2
"C M.2 OC
f0.2 OC
f0.2 OC
fO.O1 "C or better, over 1
hr.
M. 1 "C or better, over 24 hours
2-wire thermistor; AD590 current
type;
or LM335 voltage type
25 R to 450 kn, typ.
V(25 OC) = 2980 mV; VT = 10 mVI0K over rated sensor
range
1
rnA
I(25 OC) = 298.2 pA; IT = 1 pAI°K over rated sensor range
+8 VDC
10 pA or 100 pA (user selectable)
AD590 or LM335 calibrated with two-point method.
Termistors are calibrated by storing three constants of the
Steinhart-Hart equation in internal non-volatile memory.
11T
= (C1 * lo-)) + (C2 *
)(ln R) +
(C3 * 10-')(ln R))
(T in Kelvin)
T
= C1+ C2 * (VI (10 mVI0K) - 273.15)
T=Cl
+C2 * (I/(l @/OK)-273.15
24.4ccuracy figures quoted are Qpical for a 10
kSI thermistor and 100 pA source current setting (10 pA source
current settmg at
-20 OC. Accuracy figures are relative to calibration standard. Both resolution and accuracy are
dependent on the user defined configuration of the instrument.
25Stlort term temperature stabilih is a strong function of the thermal environment of the thermistor and TE
module.
Room air currents in particular can easily cause fluctuations of 0.1 "C in
an exposed mounting
configuration.
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ILX Lightwave LDC-3700 Series Specifications

General

Brand	ILX Lightwave
Model	LDC-3700 Series
Category	Controller
Language	English