Lake Shore Model 340 Temperature Controller User’s Manual
1-10
Introduction
Table 1-2. Model 340 Sensor Performance Chart (Continued)
Sensor Type
Thermocouple 25 mV
Thermocouple 50
mV
Capacitance 15 nF
Capacitance 150 nF
Temperature Coefficient
Positive.
Positive or Negative.
Sensor Units
mV nF
Input Range
±25 mV
±50 mV
0-15 nF
0-150 nF
Sensor Excitation
Not applicable.
4.88 kHz, 1V square wave
Display Resolution
Sensor Units
0.1 µV
0.1 pF
1 pF
Example Lake Shore Sensor
AuFe0.07% vs. Cr
CS-401LGB
CS-501GR
Temperature Range
1.4 – 325 K.
1-60 K (pos)
80-300 K (neg)
1.4-290 K (pos)
Standard Sensor Curve
By type.
None.
Typical Sensor Sensitivity
*
16 µV
/
K at 4.2 K
20 µV/K at 300 K
66 pF
/
K at 4.2 K
7 pF/K at 60 K
31 pF
/
K at 4.2 K
58 pF
/
K at 77 K
197 pF/K at 200 K
Measurement Resolution:
Sensor Units
Temperature Equivalence
0.2 µV
12 mK at 4.2 K
10 mK at 300 K
0.4 µV
24 mK at 4.2 K
20 mK at 300 K
0.2 pF
3 mK at 4.2 K
28 mK at 60 K
2.0 pF
65 mK at 4.2 K
34 mK at 77 K
10 mK at 200 K
Electronic Accuracy
†
:
Sensor Units
Temperature Equivalence
±1 µV ±0.05% RDG
80 mK at 4.2 K
50 mK at 300 K
±1 µV ±0.05% RDG
100 mK at 4.2 K
60 mK at 300 K
±50 pF ±0.1% RDG
0.84 K at 4.2 K
7.8 K at 60 K
±50 pF ±0.1% RDG
1.8 K at 4.2 K
1 K at 77 K
0.36 K at 200 K
Temperature Accuracy
including electronic accuracy,
CalCurve, & calibrated sensor
Calibration not available from Lake Shore.
Not applicable.
Control Stability:
Sensor Units
Temperature Equivalence
0.4 µV
24 mK at 4.2 K
20 mK at 300 K
0.8 µV
50 mK at 4.2 K
40 mK at 300 K
±0.4 pF
6 mK at 4.2 K
56 mK at 60 K
±4 pF
130 mK at 4.2 K
68 mK at 77 K
20 mK at 200 K
Magnetic Field Use
Thermocouple type dependent.
Recommended for high field.
*
Typical sensor sensitivities were taken from representative calibrations for the sensor listed.
†
Accuracy specification does not include errors from room temperature compensation.