MER-MAN-14V01 (1002)
Copyright © 2014 Defi ne Instruments
15
6
INPUT TYPES
CAUTION
Risk of electric shock.
Dangerous and lethal voltages may be present on the terminals of
the meter. Please take appropriate precautions to ensure safety.
CAUTION
Risk of danger.
The sensor input can potentially fl oat to dangerous and unexpected volt-
ages depending on what external circuit it is connected to. Appropriate considerations
must be given to the potential of the sensor input with respect to earth common.
6.1 - Thermocouple input
Thermocouple types
B, E, J, K, N, R, S, T
Input impedance
1MΩ min
TC lead resistance
100Ω max
Cold junction comp.
-10 to 70°C
Accuracy
E, J, K, N, T: < ±1°C.
B, R, S: < ±2°C.
Temperature drift
E, J, K, N, T: < ±0.05°C/C.
B, R, S: < ±0.2°C/C.
Sensor break output drive
Function high upscale/low downscale
CJC error
< ±1°C
Response time
400msec
Temperature (thermocouple)
The thermocouple is one of the most
common temperature sensors used in
industry. It relies on the Seebeck coeffi
-
cient between dissimilar metals.
The thermocouple type is selected with
reference to the application tempera-
ture range and environment. The most
common thermocouple types for general
purpose applications are J and K type.
Supported thermocouple types/ranges
K
-200°C (-328°F)
1372°C (2502°F)
B
0°C (32°F)
1820°C (3308°F)
E
-100°C (-148°F)
1000°C (1832°F)
J
-200°C (-328°F)
1000°C (1832°F)
R
-50°C (-58°F)
1760°C (3200°F)
S
-50°C (-58°F)
1760°C (3200°F)
T
-200°C (-328°F)
400°C (752°F)
N
-180°C (-292°F)
1300°C (2372°F)
