Omega 25 User Manual
3
RTD; ±0.2°F (rdg
≥
– 50°F)
RTD;
±0.5°F (rdg < – 50°F)
RTD;
±0.2°F ±0.04% rdg (meter mode)
THERMISTOR; ±0.5F
OHMS; ±0.02% range
* Exclusive of sensor errors, and lead resistance induced errors.
RESOLUTION: TEMPERATURE; 0.1°/1° F/C
RESOLUTION:
OHMS; 0.01
Ω
/0.1
Ω
/1
Ω
REPEATABILITY (1 week at constant ambient temperature):
K, J, T, E, N; ±0.2°F typ.
B, R, S, G, C, D; ±1.0°F typ.
RTD, THERMISTOR; ±0.1°F typ.
OHMS; ±0.01% rng typ.
TEMPERATURE COEFFICIENT:
From 18°C to 28°C, included in accuracy specifications.
From 0°C to 18°C, and 28°C to 50°C:
From 0°C to 18°C, and 28°C to 50°C:
K, J, T, E, N; ±(0.002% rdg + 0.03°C)/°C
B, R, S, G, C, D; ±(0.002% rdg + 0.1°C)/°C
B, R, S, G, C, D; ±(0.002% rdg + 0.1°C)/°C
RTD, THERMISTOR, OHMS; ±(0.002% rdg + 0.004% rng)/°C
METER-MODE INPUT-CURRENT (THERMOCOUPLES): 50nA typ.
METER-MODE READING-RATE: 1 reading/second typ.
METER-MODE EXCITATION-CURRENTS:
100
Ω
RTD; <2mA
1000
Ω
RTD; <200µA
999.99
Ω
; <2mA
9999.9
Ω
; <200µA
99999
Ω
; <50µA
THERMISTOR; T
≤
113°F <50µA
T> 113°F, <2mA
CALIBRATOR MODE OUTPUT LOAD (THERMOCOUPLES): 500
Ω
min.
CALIBRATOR-MODE EXCITATION-CURRENTS:
100
Ω
RTD; 0.5 – 1mA (0.1 – 2mA typ.)
1000
Ω
RTD; 50 – 100µA (10-200µA typ.)
999.99
Ω
; Same as 100
Ω
RTD
9999.9
Ω
; Same as 1000
Ω
RTD
99999
Ω
; 10 – 20µA (1 – 20µA typ.)
THERMISTOR; T
≤
113°F, 10 – 20µA
T> 113°F, 0.5 – 1mA
MAXIMUM COMMON MODE VOLTAGE: 42V peak to earth.