© Isothermal Technology
Page 97 of 102
923 milliK manual - issue: 1.10
9 Specification
Inputs
Channel 1 & 2:
SPRT/PRT/thermistor/Thermocouple
Channel 3 (rear panel)
4-20mA current loop with optional 24V loop supply
Ranges
SPRTs:
0-115
Ω
PRTs:
0-460
Ω
Thermistors:
0-500k
Ω
Thermocouples:
±115mV
4-20mA:
0-30mA
Units
°C, °F, K,
Ω
, mV, mA
Accuracy
Initial
Over 1 year
SPRTs/PRTs:
5ppm
7ppm
Thermistors:
50ppm
150ppm
Thermocouples:
1µV + 0.002% of reading 1µV + 0.006% of reading
4-20mA:
±0.01%
±0.02%
Temperature Accuracy
Initial
Over 1 year
SPRTs/PRTs (at 0°C):
3mK
4mK
(over full range):
5mK
7mK
Thermistors:
50ppm
150ppm
Thermocouples (ice-point reference):
Type B @ 1000°C:
±0.12°C
±0.14°C
Type E @ 600°C:
±0.02°C
±0.05°C
Type J @ 600°C:
±0.03°C
±0.05°C
Type K @ 600°C:
±0.04°C
±0.06°C
Type L @ 600°C:
±0.03°C
±0.05°C
Type N @ 600°C:
±0.04°C
±0.06°C
Type R @ 1000°C:
±0.09°C
±0.12°C
Type S @ 1000°C:
±0.10°C
±0.14°C
Type T @ 200°C:
±0.02°C
±0.03°C
Au-Pt @ 600°C:
±0.06°C
±0.08°C
Thermocouples (internal reference junction compensation):
Type B @ 1000°C:
±0.12°C
±0.14°C
Type E @ 600°C:
±0.10°C
±0.20°C
Type J @ 600°C:
±0.12°C
±0.23°C
Type K @ 600°C:
±0.13°C
±0.25°C
Type L @ 600°C:
±0.12°C
±0.23°C
Type N @ 600°C:
±0.10°C
±0.19°C
Type R @ 1000°C:
±0.14°C
±0.21°C
Type S @ 1000°C:
±0.16°C
±0.24°C
Type T @ 200°C:
±0.10°C
±0.18°C
Au-Pt @ 600°C:
±0.10°C
±0.15°C
Measurement Time
PRTs (4-wire):
0.4s
(3-wire):
0.7s
Thermistors:
0.4s
Thermocouples (ice point):
0.4s
(internal RJC):
0.7s
(external RJC):
1.0s
Resolution
Resistance (PRTs):
0.00001
Ω
(Thermistors):
0.001
Ω
Voltage:
0.00001mV
Current:
0.001mA
Temperature:
0.0001°
Temperature
Conversions
PRTs:
IEC60751(2008), Callendar-van Dusen, ITS90
Thermocouples:
IEC584-1 1995 (B,E,J,K,N,R,S,T), L, Au-Pt
Thermistors:
Steinhart-Hart, polynomial
Sensor Currents
SPRTs/PRTs:
1mA and 1.428mA ±0.4% (reversing)
Thermistors:
2µA (reversing)
