The 230 Series transmitters are discontinued. Please consider the 240 Series as a replacement.

Specifications

 231231P234
Thermometry
Number of inputs 111
Measurement type 4-lead differential 4-lead differential 4-lead differential
Sensor typeSilicon diode, GaAIAs diodePlatinumCarbon-glass, Germanium, Cernox®
Sensor temperature coefficientNegativePositiveNegative
Sensor unitsVolts (V)Ohms (Ω)Ohms (Ω)
Input range0 to 5 V 0 Ω to 312 Ω1 Ω to 300 kΩ
Sensor excitation10 µA ±0.1% DC current500 µA ±0.02% DC currentConstant voltage pinned at 5 mV or 10 mV dependent on resistance range
Update rate5 readings per s5 readings per s4 readings per s (2 readings per s on Scale 0 only)
Precision curve storageOne curve loaded at Lake ShoreOne curve loaded at Lake ShoreOne curve, loaded at Lake Shore or in the field via serial interface
Example Lake Shore sensorDT-470-C0PT-103CGR-1-1000 with 1.4L calibration
Sensor temperature range1.4 K to 475 K30 K to 800 K1.4 K to 325 K
Standard curveLake Shore Curve 10 IEC 751 Requires calibrated sensor and CalCurve™
Typical sensor sensitivity1-30 mV/K at 4.2 K
-1.9 mV/K at 77 K
-2.4 mV at 300 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 800 K
-700 Ω/K at 4.2 K
-24 Ω/K at 10 K
-0.15 Ω/K at 77 K
-0.02 Ω/K at 300 K
Measurement resolution1
Sensor units
Temperature equivalence
 
76.3 µV
2.5 mK at 4.2 K
40 mK at 77 K
32 mK at 300 K
 
4.8 mΩ
22 mK at 30 K
11 mK at 77 K
13 mK at 300 K
14 mK at 800 K
 
Range dependent
±0.04 mK at 4.2 K
±0.12 mK at 30 K
±6.6 mK at 77 K
±67 mK at 300 K
Electronic measurement accuracy1
Sensor units
Temperature accuracy
 
±75 µV ±0.01% of reading
±0.07 K at 4.2 K
±0.16 K at 77 K
±0.12 K at 300 K
 
±0.05 Ω ±0.05% of reading
±0.2 K at 30 K
±0.15 K at 77 K
±0.3 K at 300 K
±0.7 K up to 800 K
 
Range dependent (see table)
±2 mK at 4.2 K
±8 mK at 10 K
±18 mK at 77 K
±1.2 K at 300 K
Measurement temperature coefficient
Sensor units (% of reading /°C ambient)
Temperature equivalence
 
0.0006% of resistance rdg/ºC
3 mK/ºC at 4.2 K
3 mK/ºC at 77 K
1.2 mK/ºC at 300 K
 
0.002% of resistance rdg/ºC
0.4 mK/ºC at 30 K
1 mK/ºC at 77 K
6 mK/ºC at 300 K
18 mK/ºC at 800 K
 
0.0125% of resistance rdg/ºC
±0.18 mK/ºC at 4.2 K
±0.8 mK/ºC at 10 K
±18 mK/ºC at 77 K
±100 mK/ºC at 300 K
Magnetic field use   


Silicon diode Recommended for
T 60 K and B 3 T
NANA
GaAIAs diodeRecommended for
T 4.2 K and B 5 T
NA NA
PlatinumNARecommended for
T > 4.2 K and B < 2.5 T
NA
Carbon-glassNANARecommended for
T 2 K and B 19 T
GermaniumNANANot recommended
Cernox®NANARecommended
1 Click here for sample calculations of typical sensor performance
 231231P234
Output   
Number of outputs111
Output typeCurrent source, isolated from power source—output or sensor can be grounded, but not both
(all models)
Output range4 mA to 20 mA or 0 mA to 20 mA (for 0 V to 10 V with provided 500 Ω 0.02%, 25 ppm resistor)
(all models)
Output compliance10 V (500 Ω max load)10 V (500 Ω max load)10 V (500 Ω max load)
Output temperature ranges
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
 
0 K to 20 K
0 K to 100 K
0 K to 200 K
0 K to 325 K
0 K to 475 K
0 K to 1000 K
 
0 K to 20 K
0 K to 100 K
0 K to 200 K
0 K to 325 K
0 K to 475 K
0 K to 1000 K
 
0 K to 10 K
0 K to 20 K
0 K to 100 K
0 K to 200 K
0 K to 300 K
75 K to 325 K
4 mA to 20 mA output
Output resolution
Current
Temperature equivalence
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
 
 
1.22 µA (0.006% of full scale)
 
1.5 mK
7.6 mK
15.3 mK
24.8 mK
36.2 mK
76.3 mK
 
 
1.22 µA (0.006% of full scale)
 
Not used
7.6 mK
15.3 mK
24.8 mK
36.2 mK
76.3 mK
 
 
1.22 µA (0.006% of full scale)
 
0.8 mK
1.5 mK
7.6 mK
15.3 mK
22.9 mK
19.1 mK
Output accuracy
Current
Temperature equivalence
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
 
±2 µA (±0.01% of full scale)
 
2.5 mK
12.5 mK
25 mK
41 mK
59 mK
125 mK
 
±2 µA (±0.01% of full scale)
 
Not used
12.5 mK
25 mK
41 mK
59 mK
125 mK
 
±5 µA (±0.025% of full scale)
 
3.1 mK
6.2 mK
31.2 mK
62.5 mK
93.7 mK
78.1 mK
Output temperature coefficient
Current (%/ºC ambient)
 
Temperature equivalence
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
 
±0.0055% of output current
per ºC
 
1 mK/ºC
6 mK/ºC
12 mK/ºC
18 mK/ºC
26 mK/ºC
55 mK/ºC
 
±0.0055% of output current
per ºC
 
Not used
6 mK/ºC
12 mK/ºC
18 mK/ºC
26 mK/ºC
55 mK/ºC
 
±2 µA/ºC (±0.01%/ºC)
 
 
±1 mK/ºC
±2 mK/ºC
±10 mK/ºC
±20 mK/ºC
±30 mK/ºC
±25 mK/ºC
0 mA to 20 mA output (0 V to 10 V with
500 Ω, 0.02% load resistor)
Output resolution
Voltage
Temperature equivalence
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
 
 
 
0.6 mV
 
1.2 mK
6.1 mK
12.2 mK
19.8 mK
29 mK
61 mK
 
 
 
0.6 mV
 
Not used
6.1 mK
12.2 mK
19.8 mK
29 mK
61 mK
 
 
 
0.61 mV
 
0.6 mK
1.2 mK
6.1 mK
12.2 mK
18.3 mK
15.2 mK
Output accuracy
Voltage
 
Temperature equivalence
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
 
3 mV (0.03% of full scale)
 
 
6 mK
30 mK
60 mK
98 mK
143 mK
300 mK
 
3 mV (0.03% of full scale)
 
 
Not used
30 mK
60 mK
98 mK
143 mK
300 mK
 
±4.5 mV (±0.025% of full scale
±0.02% resistor accuracy)
 
4.5 mK
9.0 mK
45.0 mK
90.0 mK
135 mK
112.5 mK
Output temperature coefficient
Voltage (% output/ºC ambient)
 
Temperature equivalence
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
 
±0.008%/ºC
 
 
2 mK/ºC
8 mK/ºC
16 mK/ºC
26 mK/ºC
38 mK/ºC
80 mK/ºC
 
±0.008%/ºC
 
 
Not used
8 mK/ºC
16 mK/ºC
26 mK/ºC
38 mK/ºC
80 mK/ºC
 
±1.25 mV/ºC (±0.01%/ºC
±0.0025%/ºC of load resistor)
 
±1.2 mK/ºC
±2.5 mK/ºC
±12 mK/ºC
±25 mK/ºC
±36 mK/ºC
±30 mK/ºC
General   
Ambient temperature range15 °C to 35 °C15 °C to 35 °C15 °C to 35 °C
Power requirements±5 (±0.25) VDC,
(500 mA), 2.5 W
±5 (±0.25) VDC,
(500 mA), 2.5 W
234: ±5 (±0.25) VDC, (500 mA), 2.5 W
Enclosure typesee diagramssee diagramssee diagrams
MountingVME end panel and back plane: transmitters do not use electrical bus format, only its physical shape and powerVME end panel and back plane: transmitters do not use electrical bus format, only its physical shape and powerVME end panel and back plane: transmitters do not use electrical bus format, only its physical shape and power
Size100 mm H × 160 mm D
× 30.5 mm W
100 mm H × 160 mm D
× 30.5 mm W
234: 100 mm H × 160 mm D × 30.5 mm W
Weight0.25 kg (0.5 lb)0.25 kg (0.5lb)0.25 kg (0.5 lb)
 
 
 
Click to Enlarge
2308-12

 

Click to Enlarge
2001
 
Click to Enlarge
2002
 
Click to Enlarge
2003

 

 
Multiple Card Enclosure (part number 2308-12)
The Model 2308-12 VME card case holds up to 12 temperature transmitters. A +5 VDC power supply with universal input is provided with the case. Wall mount power supplies are not necessary with a 2308-12.

Card Slots

12
Output voltage
+5 VDC, 100 mV peak to peak ripple
Output current
6 A (max)
Input power
 
Universal 85 to 265 VAC, 47 to 440 Hz, 60 W
Ambient temp range
 
15 ºC to 35 ºC (59 ºF to 95 ºF)
Enclosure mounting
Bench or full (19 in) rack
Size
450 mm W × 178 mm H × 260 mm D (17.7 in × 7 in × 10.25 in)
Weight5.5 kg (12 lb)
 
Power Connections
Lake Shore temperature transmitters are powered by a +5 VDC supply if the transmitter card is ordered without a rack or plug-in supply. The voltage must be regulated to within ±0.25 VDC. Each transmitter draws up to 500 mA from the supply.