Technical Characteristics - AEMC 1822 User Manual

5.1. Reference Conditions
Quantity of influence
Temperature
Relative humidity
Supply voltage
Electric field
Magnetic field
The intrinsic uncertainty is the error specified for the reference conditions.
θ
= temperature
R = reading
5.2. Electrical Specifications
5.2.1. Models 1821 and 1822
5.2.1.1 Temperature Measurement
Type of thermocouple
Specified measurement range
(according to the type of
thermocouple used)
Resolution
Intrinsic uncertainty (J, K, T, N,
E)
Intrinsic uncertainty (R, S)
The aging of the internal reference voltage causes the intrinsic uncertainty to increase:

after 4000 hours of use with R and S thermocouples

after 8000 hours with other thermocouples
For Models 1821 and 1822, connecting the instrument to a computer via a micro USB cable causes an internal
temperature rise in the instrument that may result in a temperature measurement error of approximately 2.7°F
(1.5°C). This temperature rise does not occur when the instrument is connected to a wall outlet or when it is
powered by batteries.
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5. TECHNICAL CHARACTERISTICS

Reference values
73 ± 3.6°F (23 ± 2°C)
J, K, T, N, E, R, S
J: -346 to +2192°F (-210 to +1200°C)
K: -328 to +2501°F (-200 to +1372°C)
T: -418 to +752°F (-250 to +400°C)
N: -328 to +2372°F (-200 to +1300°C)
E: -238 to +1742°F (-150 to +950°C)
R: +32 to +3212°F (0 to +1767°C)
S: +32 to +3212°F (0 to +1767°C)
θ ≤
°F: 1000°C: 0.1°F and
θ ≤
°C: 1000°C: 0.1°C and
°F:
θ ≤
-148°F: ±(0.2% R
-148°F < θ ≤
+212°F < θ: ±(0.1% R
°C:
θ ≤
-100°C: ±(0.2% R
-100°C < θ ≤
+100°C < θ: ±(0.1% R
°F:
θ ≤
+212°F: ±(0.15% R
+212°F < θ:
°C:
θ ≤
+100°C: ±(0.15% R
+100°C < θ:
45% to 75%
3 to 4.5V
< 1V/m
< 40A/m
θ ≤ 1000°F: 1°F
θ ≤ 1000°C: 1°C
± 1.1°F)
+212°F: ±(0.15% R ± 1.1°F)
± 1.1°F)
± 0.6°C)
+100°C: ±(0.15% R ± 0.6°C)
± 0.6°C)
± 1.8°F)
±(0.1% R ± 1.8°F)
± 1.0°C)
±(0.1% R ± 1.0°C)
Thermometer Data Logger Models 1821, 1822, 1823