Lakeshore 340 - Page 20

Lake Shore Model 340 Temperature Controller User’s Manual
1-8 Introduction
Table 1-2. Model 340 Sensor Input Performance Chart
Sensor Type Silicon Diode GaAlAs Diode
100 Ω Platinum RTD
250 Ω Full scale
100 Ω Platinum RTD
500 Ω Full scale
1000 Ω
Platinum RTD
Temperature Coefficient Negative Negative Positive Positive Positive
Sensor Units Volts (V) Volts (V)
Ohms (Ω) Ohms (Ω) Ohms (Ω)
Input Range 0 - 2.5 V 0 – 7.5 V
0 – 250 Ω 0 – 500 Ω 0 – 2500 Ω
Sensor Excitation (Constant Current) 10 µA ±0.01% 10 µA ±0.01% 1 mA 1 mA 0.1 mA
Display Resolution Sensor Units 10 µV 10 µV
1 mΩ 1 mΩ 10 mΩ
Example Lake Shore Sensor
DT-470-CO-13 with
1.4H calibration
TG-120SD with 1.4H
calibration
PT-103 with 14J
calibration
PT-103 with 14J
calibration
PT-1001
*
with 1.4G
calibration
Temperature Range 1.4 – 475 K 1.4 - 475 K 30 – 675 K 30 – 800 K 30 – 675 K
Standard Sensor Curve Lake Shore
Curve 10
Requires calibrated
sensor
DIN 43760 DIN 43760 Scaled from
DIN 43760
Typical Sensor Sensitivity
†
-30 mV/K at 4.2 K
-1.9 mV/K at 77 K
-2.4 mV/K at 300 K
-2.2 mV/K at 475 K
-180 mV/K at 10 K
-1.25 mV/K at 77 K
-2.75 mV/K at 300 K
-2.75 mV/K at 475 K
0.19 Ω /K at 30 K
0.42 Ω /K at 77 K
0.39 Ω /K at 300 K
0.34 Ω /K at 675 K
0.19 Ω /K at 30 K
0.42 Ω /K at 77 K
0.39 Ω /K at 300 K
0.33 Ω /K at 800 K
1.9 Ω /K at 30 K
4.2 Ω /K at 77 K
3.9 Ω /K at 300 K
3.4 Ω /K at 675 K
Measurement Resolution:
Sensor Units
Temperature Equivalence
10 µV
0.4 mK at 4.2 K
5.5 mK at 77 K
4.2 mK at 300 K
4.5 mK at 475 K
10 µV
0.1 mK at 10 K
8.0 mK at 77 K
3.6 mK at 300 K
3.6 mK at 475 K
1 mΩ
5.3 mK at 30 K
2.4 mK at 77 K
2.6 mK at 300 K
3.0 mK at 675 K
1 mΩ
5.3 mK at 30 K
2.4 mK at 77 K
2.6 mK at 300 K
3.0 mK at 800 K
10 mΩ
5.3 mK at 30 K
2.4 mK at 77 K
2.6 mK at 300 K
3.0 mK at 675 K
Electronic Accuracy:
Sensor Units
Temperature Equivalence
±80 µV ±0.005%
of reading
±5 mK at 4.2 K
±70 mK at 77 K
±50 mK at 300 K
±40 mK at 475 K
±80 µV ±0.01%
of reading
±3 mK at 10 K
±150 mK at 77 K
±75 mK at 300 K
±55 mK at 475 K
±0.002 Ω ±0.01%
of reading
±16 mK at 30 K
±10 mK at 77 K
±31 mK at 300 K
±82 mK at 675 K
±0.002 Ω ±0.01%
of reading
±16 mK at 30 K
±10 mK at 77 K
±31 mK at 300 K
±82 mK at 800 K
±0.03 Ω ±0.02%
of reading
±26 mK at 30 K
±17 mK at 77 K
±59 mK at 300 K
±161 mK at 675 K
Temperature Accuracy including
electronic accuracy, CalCurve
and calibrated sensor
±27 mK at 4.2 K
±110 mK at 77 K
±85 mK at 300 K
±150 mK at 475 K
±23 mK at 10 K
±195 mK at 77 K
±120 mK at 300 K
±165 mK at 475 K
±26 mK at 30 K
±20 mK at 77 K
±51 mK at 300 K
±182 mK at 675 K
±26 mK at 30 K
±20 mK at 77 K
±51 mK at 300 K
±182 mK at 800 K
±36 mK at 30 K
±27 mK at 77 K
±79 mK at 300 K
±261 mK at 675 K
Control Stability:
Sensor Units
Temperature Equivalence
±20 µV
±0.8 mK at 4.2 K
±11 mK at 77 K
±8.4 mK at 300 K
±9 mK at 475 K
±20 µV
±0.2 mK at 10 K
±16 mK at 77 K
±7.2 mK at 300 K
±7.2 mK at 475 K
±2 mΩ
±11 mK at 30 K
±4.8 mK at 77 K
±5.2 mK at 300 K
±6.0 mK at 675 K
±2 mΩ
±11 mK at 30 K
±4.8 mK at 77 K
±5.2 mK at 300 K
±6.0 mK at 800 K
±20 mΩ
±11 mK at 30 K
±4.8 mK at 77 K
±5.2 mK at 300 K
±6.0 mK at 675 K
Magnetic Field Use
Recommended for
T ≥ 60 K and B ≤ 3 T
Recommended for
T > 4.2 K & B ≤ 5 T
Recommended for
T > 40 K & B ≤ 2.5 T
Recommended for
T > 40 K & B ≤ 2.5 T
Recommended for
T > 40 K & B ≤ 2.5 T
* No longer available from Lake Shore.
† Typical sensor sensitivities were taken from representative calibrations for the sensor listed.