Lakeshore 340 - Page 157

Lake Shore Model 340 Temperature Controller User’s Manual
Options and Accessories 10-17
Table 10-3. Model 3468 Sensor Input Performance Chart
Sensor Type Silicon Diode GaAlAs Diode
100 Ω Platinum RTD
500 Ω Full scale
1000 Ω
Platinum RTD
Cernox™ RTD
Temperature Coefficient Negative Negative Positive Positive Negative
Sensor Units Volts (V) Volts (V)
Ohms (Ω) Ohms (Ω) Ohms (Ω)
Input Range 0 – 2.5 V 0 – 7.5 V
0 – 500 Ω 0 – 5000 Ω 0 – 7500 Ω
Sensor Excitation (Constant Current) 10 µA ±0.01% 10 µA ±0.01% 1 mA ±0.3% 1 mA ±0.3% 10 µA ±0.01%
Display Resolution Sensor Units 100 µV 100 µV
10 mΩ 100 mΩ 100 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-1001
*
with 1.4G
calibration
CX-1050-SD with 4L
calibration
Temperature Range 1.4 – 475 K 1.4 - 475 K 30 – 800 K 30 – 800 K 3.5 – 400 K
Standard Sensor Curve Lake Shore
Curve 10
Requires calibrated
sensor
DIN 43760 Scaled from
DIN 43760
Requires calibrated
sensor
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
0.35 Ω/K at 675 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
-770 Ω/K at 4.2 K
-1.5 Ω/K at 77 K
-0.1 Ω/K at 300 K
Measurement Resolution:
Sensor Units
Temperature Equivalence
20 µV
1 mK at 4.2 K
11 mK at 77 K
10 mK at 300 K
10 mK at 475 K
20 µV
1 mK at 10 K
16 mK at 77 K
10 mK at 300 K
10 mK at 475 K
2 mΩ
10.6 mK at 30 K
10 mK at 77 K
10 mK at 300 K
10 mK at 675 K
10 mK at 800 K
20 mΩ
10.6 mK at 30 K
10 mK at 77 K
10 mK at 300 K
10 mK at 800 K
50 µV
1 mK at 4.2 K
33.3 mK at 77 K
500 mK at 300 K
Electronic Accuracy:
Sensor Units
Temperature Equivalence
±160 µV ±0.01%
of reading
±11 mK at 4.2 K
±138 mK at 77 K
±88 mK at 300 K
±77 mK at 475 K
±160 µV ±0.02%
of reading
±6 mK at 10 K
±300 mK at 77 K
±150 mK at 300 K
±110 mK at 475 K
±0.004 Ω ±0.02%
of reading
±25 mK at 30 K
±18 mK at 77 K
±70 mK at 300 K
±162 mK at 675 K
±187 mK at 800 K
±0.03 Ω ±0.02%
of reading
±40 mK at 30 K
±33 mK at 77 K
±135 mK at 300 K
±370 mK at 800 K
±0.1 Ω ±0.04%
of reading
±1 mK at 4.2 K
±88 mK at 77 K
±1.144 K at 300 K
Temperature Accuracy including
electronic accuracy, CalCurve
and calibrated sensor
±31 mK at 4.2 K
±193 mK at 77 K
±138 mK at 300 K
±177 mK at 475 K
±21 mK at 10 K
±390 mK at 77 K
±140 mK at 300 K
±210 mK at 475 K
±45 mK at 30 K
±38 mK at 77 K
±105 mK at 300 K
±262 mK at 675 K
±287 mK at 800 K
±60 mK at 30 K
±53 mK at 77 K
±170 mK at 300 K
±470 mK at 800 K
±9 mK at 4.2 K
‡
±138 mK at 77 K
‡
±1.284 K at 300 K
‡
Magnetic Field Use
Recommended for
T ≥ 60 K & 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 > 2 K & B ≤ 19 T
* No longer available from Lake Shore.
†
Typical sensor sensitivities were taken from representative calibrations for the sensor listed.
‡
Specified accuracy includes no effect of thermal EMF voltages. An error of 3 mΩ results from each 1 µV of thermal EMF voltage. In
well-designed systems, thermal EMF voltage should be less than 10 µV.