Lakeshore 340 - Page 21

Lake Shore Model 340 Temperature Controller User’s Manual
Introduction 1-9
Table 1-2. Model 340 Sensor Input Performance Chart (Continued)
Sensor Type Rox™ Thermox™ Carbon-Glass™ Cernox™ Germanium
Temperature Coefficient Negative
Negative
Negative Negative Negative
Sensor Units
Ohms (Ω) Ohms (Ω) Ohms (Ω) Ohms (Ω) Ohms (Ω)
Input Range 10 ranges from
10 Ω to 300 kΩ
(1)
10 ranges from
10 Ω to 300 kΩ
*
10 ranges from
10 Ω to 300 kΩ*
10 ranges from
10 Ω to 300 kΩ*
10 ranges from
1 Ω to 30 kΩ
Sensor Excitation (Constant Current) 10 mV maximum
(10 current settings
from 30 nA to 1 mA)
10 mV maximum
(10 current settings
from 30 nA to 1 mA).
10 mV maximum
(10 current settings
from 30 nA to 1 mA)
10 mV maximum
(10 current settings
from 30 nA to 1 mA)
1 mV maximum
(10 current settings
from 30 nA to 1 mA)
Display Resolution Sensor Units Six digits Six digits Six digits Six digits Six digits
Example Lake Shore Sensor
RX-102A-AA with
0.3E calibration
TX-104-GB with 70L
calibration
CGR-1-500 with 1.4L
calibration
CX-1050-SD with 1.4L
calibration
GR-200A-100 with
0.3 A calibration
Temperature Range 0.3 – 200 K 70 – 325 K 1.4 – 325 K 0.3 – 325 K 0.3 – 40 K
Standard Sensor Curve Requires calibrated
sensor
Requires calibrated
sensor
Requires calibrated
sensor
Requires calibrated
sensor
Requires calibrated
sensor
Typical Sensor Sensitivity
†
-16 kΩ/K at 0.3 K
-80 Ω/K at 4.2 K
-4 Ω/K at 20 K
-0.3 Ω/K at 77 K
-9.5 kΩ/K at 77 K
-780 Ω/K at 100 K
-0.78 Ω/K at 200 K
-0.035 Ω/K at 300 K
-200 kΩ/K at 1.4 K
-706 Ω/K at 4.2 K
-0.15 Ω/K at 77 K
-0.015 Ω/K at 300 K
-300 kΩ/K at 1.4 K
-10 kΩ/K at 4.2 K
-5 Ω/K at 77 K
-0.1 Ω/K at 300 K
-209 kΩ /K at 0.3 K
-400 Ω /K at 1.4 K
-20 Ω /K at 4.2 K
-8.7 Ω /K at 6.0 K
Measurement Resolution:
Sensor Units
Temperature Equivalence
6 digits above 10 Ω
0.1 mK at 0.3 K
0.3 mK at 4.2 K
5 mK at 20 K
70 mK at 77 K
6 digits above 10 Ω
0.1 mK at 77 K
0.1 mK at 100 K
3 mK at 200 K
60 mK at 300 K
6 digits above 10 Ω
0.1 mK at 1.4 K
0.2 mK at 4.2 K
20 mK at 77 K
133 mK at 300 K
6 digits above 10 Ω
0.1 mK at 1.4 K
0.1 mK at 4.2 K
0.5 mK at 77 K
20 mK at 300 K
6 digits above 1 Ω
0.1 mK at 0.3 K
0.1 mK at 1.4 K
0.3 mK at 4.2 K
0.6 mK at 6.0 K
Electronic Accuracy:
Sensor Units
Temperature Equivalence
±0.02% RNG
±0.05% RDG
10 Ω to 80 kΩ.
±0.02% RNG
±0.2% RDG >80kΩ
±0.5 mK at 0.3 K
±16 mK at 4.2 K
±275 mK at 20 K
±3700 mK at 77 K
±0.02% RNG
±0.05% RDG
0 Ω to 80 kΩ.
±0.02% RNG
±0.2% RDG >80kΩ
±6.6 mK at 77 K
±8 mK at 100 K
±22 mK at 200 K
±100 mK at 300 K
±0.02% RNG
±0.05% RDG
10 Ω to 80 kΩ.
±0.02% RNG
±0.2% RDG >80kΩ
±2 mK at 1.4 K
±2 mK at 4.2 K
±235 mK at 77 K
±2900 mK at 300 K
±0.02% RNG
±0.05% RDG
10 Ω to 80 kΩ
±0.02% RNG
±0.2% RDG >80kΩ
±1 mK at 1.4 K
±2 mK at 4.2 K
±80 mK at 77 K
±400 mK at 300 K
±0.02% RNG
±0.1% RDG
10 Ω to 8 kΩ.
±1 mK at 0.3 K
±20 mK at 1.4 K
±25 mK at 4.2 K
±50 mK at 6.0 K
Temperature Accuracy including
electronic accuracy, CalCurve
and calibrated sensor
±5.5 mK at 0.3 K
±28 mK at 4.2 K
±385 mK at 20 K
±4900 mK at 77 K
±34.6 mK at 77 K
±29 mK at 100 K
±52 mK at 200 K
±160 mK at 300 K
±7 mK at 1.4 K
±7 mK at 4.2 K
±285 mK at 77 K
±3150 mK at 300 K
±6 mK at 1.4 K
±7 mK at 4.2 K
±110 mK at 77 K
±450 mK at 300 K
±6 mK at 0.3 K
±25 mK at 1.4 K
±30 mK at 4.2 K
±55 mK at 6.0 K
Control Stability:
Temperature Equivalence
±0.2 mK at 0.3 K
±0.6 mK at 4.2 K
±10 mK at 20 K
±150 mK at 77 K
±0.2 mK at 77 K
±0.2 mK at 100 K
±6 mK at 200 K
±120 mK at 300 K
±0.2 mK at 1.4 K
±0.4 mK at 4.2 K
±40 mK at 77 K
±300 mK at 300 K
±0.2 mK at 1.4 K
±0.2 mK at 4.2 K
±1 mK at 77 K
±40 mK at 300 K
±0.2 mK at 0.3 K
±0.2 mK at 1.4 K
±0.6 mK at 4.2 K
±1.2 mK at 6.0 K
Magnetic Field Use
Recommended for
T > 2 K and B ≤ 10 T
Not recommended Recommended for
T > 2 K and B ≤ 19 T
Recommended for
T > 2 K and B ≤ 19 T
Not recommended
* Can be used below 3 Ω with reduced resolution and accuracy.
† Typical sensor sensitivities were taken from representative calibrations for the sensor listed.