BATTERY LIFE, CONTINUOUS: 10 hrs. typical, alkaline; 3 hrs typical, Ni-Cd
(rechargeable).
BATTERY INDICATOR: Display indicates BAT when less than 10% of life remains.
DIMENSIONS, WEIGHT: 7.0" x 2.9 x 1.1". Net weight 12 oz.
UNIQUE SPECIFICATIONS
NOTE: The specifications below are specific to the model(s) as identified by model
number. The difference specifications are in addition to the OVERALL SERIES SPECI-
FICATIONS found on pages 2-5.
• MODEL 840A:
SENSOR SELECTION: K, J, T Thermocouples
ACCURACY: (18°C to 28°C ambient, 2 years): ±0.5°F (rdg ≥ -50°F).
±0.04% rdg (rdg > 1250°F)
±1.0°F (rdg < -50°F)
TEMPERATURE COEFFICIENT: 18°C to 28°C; included in accuracy specifications.
From 0°C to 18°C, and 28°C to 50°C; less than ±(0.006% rdg +0.03°C)/°C.
RAMP FUNCTION: Not Included.
BATTERY LIFE, CONTINUOUS: 16 hrs typical, alkaline; 4 hrs typical, Ni-Cd
(rechargeable).
• MODEL 841:
SENSOR SELECTION: K, J, T, E Thermocouples
ACCURACY: (18°C to 28°C ambient, 2 years): ±0.5°F (rdg≥ -50°F).
±0.04% rdg (rdg > 1250°F)
±1.0°F (rdg <-50°F)
TEMPERATURE COEFFICIENT: 18°C to 28°C; included in accuracy specifications.
From 0°C to 18°C, and 28°C to 50°C; less than ±(0.006% rdg +0.03°C)/°C.
RAMP FUNCTION: Not Included.
BATTERY LIFE, CONTINUOUS: 16 hrs typical, alkaline; 4 hrs typical, Ni-Cd
(rechargeable).
• MODEL 845:
SENSOR SELECTION: K, J, T, E, N, B, R, S, G, C, D Thermocouples
RAMP FUNCTION: Included.
BATTERY LIFE, CONTINUOUS: 16 hrs typical, alkaline; 4 hrs typical, Ni-Cd
(rechargeable)
• MODEL 850:
SENSOR SELECTION: K, J, T, E Thermocouples
100Ω Platinum RTD
2252Ω Thermistor
1,000Ω/100,000Ω Resistance
5
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