Lakeshore 332 - Specifications

Lake Shore Model 332 Temperature Controller User’s Manual
1.3 SPECIFICATIONS
Table 1-3. Model 332 Input Specifications
Input Type
Input
Range
Excitation Resolution
Electronic
Accuracy
Temperature
Coefficient
Display
Resolution
NTC-RTD *
0 – 75 Ω
1 mA
0.3 mΩ +0.000%
of reading
±0.001Ω ±0.04%
of reading
0.2 mΩ/°C +15 PPM
of reading/°C
1 mΩ
0 – 750 Ω
100 µA
3 mΩ +0.001%
of reading
±0.01Ω ±0.04%
of reading
2.0 mΩ/°C +15 PPM
of reading/°C
10 mΩ
0 – 7.5 kΩ
10 µA
20 mΩ +0.001%
of reading
±0.1Ω ±0.04%
of reading
20 mΩ/°C +15 PPM
of reading/°C
100 mΩ
0 – 75 kΩ
1 µA
0.15 Ω +0.003%
of reading
±1.0Ω ±0.04%
of reading
200 mΩ/°C +15 PPM
of reading/°C
1 Ω
PTC-RTD *
0 – 250 Ω
1 mA
2 mΩ
±0.004Ω ±0.01%
of reading
0.2 mΩ/°C +5 PPM
of reading/°C
10 mΩ
0 – 500 Ω
1 mA
2 mΩ
±0.004Ω ±0.01%
of reading
0.2 mΩ/°C +5 PPM
of reading/°C
10 mΩ
0 – 1000 Ω
1 mA
20 mΩ
±0.04Ω ±0.02%
of reading
2.0 mΩ/°C +5 PPM
of reading/°C
100 mΩ
Diode
0 – 2.5 V 10 µA ±0.05% 10 µV
±80 µV ±0.005%
of reading
10 µV/°C +5 PPM
of reading/°C
100 µV
0 – 7.5 V 10 µA ±0.05% 20 µV
±80 µV ±0.005%
of reading
20 µV/°C +5 PPM
of reading/°C
100 µV
Thermocouple
±25 mV Not applicable 0.4 µV
±1 µV ±0.05%
of reading
0.2 µV/°C +15 PPM
of reading/°C
1 µV
±50 mV Not applicable 0.4 µV
±1 µV ±0.05%
of reading
0.4 µV/°C +15 PPM
of reading/°C
1 µV
* Current reversal eliminates thermal EMF voltage errors for resistor sensors.
Thermometry
Number of Inputs: 2
Input Configuration: Each input is factory configured as either Diode/RTD or Thermocouple
Diode/RTD Thermocouple
Measurement Type Four-lead differential with current reversal Two lead, room temperature compensated
Excitation Constant current Not Applicable
Supported Sensors
Diodes: Silicon, GaAlAs, RTDs: 100
Ω
Platinum, 1000
Ω Platinum, Germanium,
Carbon Glass, Cernox, ROX, Thermox
Most thermocouple types
Standard Curves
DT-470, DT-500D, DT-670, PT-100, PT-
1000, RX-102A, RX-202A
Type E, Type K, Type T, AuFe0.07% vs. Ch,
AuFe0.03% vs. Ch
Input Connector 6 pin DIN Ceramic isothermal block
Isolation: Sensor inputs optically isolated from other circuits but not each other
A/D Resolution: 24 bit
Input Accuracy: Sensor dependent – Refer to Table 1-3
Measurement Resolution: Sensor dependent – Refer to Table 1-3
Maximum Update Rate: 10 readings per second on each input with the following exceptions:
5 readings per second when configured as NTC RTD 75 kΩ with reversal on.
5 readings per second on input A when configured as thermocouple.
Auto Range: Auto Range available to automatically select appropriate NTC RTD range.
User Curves: Room for twenty 200-point CalCurves or user curves
SoftCal: Improves accuracy of DT-470 Diode to ±0.25 K from 30 to 375 K. Improves accuracy of
Platinum RTDs to ±0.25 K from 70 to 325 K. Stored as user curves
Math: Maximum, Minimum, and Linear Equation (Mx
+ B) or M (x + B)
Filter: Averages 2 to 64 input readings
1-8 Introduction