Fema C Series, User Manual, Page: 8 / 32

FEMA ELECTRÓNICA . Series C . C40-D
8
1.12 Measuring thermocouples
• Thermocouples accepted
The instrument accepts direct connection of thermo -
couples type K, J, E, N, L, R, S, B, T and C.
• Temperature ranges and total error
Temperature ranges and total error for each type of thermocouple
are indicated on
‘Table 10’
below.
• Cold junction compensation
The thermocouple cold junction is automatically compensated by
the instrument. The automatic compensation can be disabled from
the configuration menu.
• Resolution and units
The instrument resolution when measuring thermocouples is 1º.
Reading can be configured in ºC (degrees Celsius) or ºF (degrees
Fahrenheit).
• Sensor break detection
In case of sensor break, the instrument will show ‘
h.ovr
’ or ‘
h.udr
’
(see section 1.28)
depending on the broken cable.
Thermocouple Jumper ‘S’
(see section 1.9)
Jumper ‘T’
(see section 1.9)
Range in ºC
(in ºF)
Connection
( terminals)
Total error
(cold junction included)
Thermocouple K
E
4-5
-100 / 1350 ºC
(-148 / 2462 ºF)
2 (tc +)
4 (tc -)
<3 º
Thermocouple J
-100 / 1200 ºC
(-148 / 2192 ºF)
Thermocouple E
-100 / 1000 ºC
(-148 / 1832 ºF)
Thermocouple N
-100 / 1300 ºC
(-148 / 2372 ºF)
Thermocouple L
-100 / 900 ºC
(-148 / 1652 ºF)
Thermocouple R
E J
0 / 1768 ºC
(32 / 3214 ºF)
Thermocouple S
0 / 1768 ºC
(32 / 3214 ºF)
Thermocouple T
-100 / 400 ºC
(-148 / 752 ºF)
Thermocouple C E
0 / 2300 ºC
(32 / 4172 ºF)
<5 º
Thermocouple B E J
700 / 1820 ºC
(1292 / 3308 ºF)
Table 10 - Temperature ranges for thermocouples
tc +
tc -
1 2 3 4 5
• Compensated cable
To correctly measure a thermocouple signal, always use compensat -
ed cable, of the thermocouple used, to connect the instrument and
the thermocouple.
• Response times
The response time to a signal step is 300 mSeconds, independent of
the signal range selected.
• Terminal 5 ‘multifunction’ - External control
Terminal 5 remains configured as ‘EK’ external control function. See
section 1.9 for a list of available functions.
• Start-up, connections and jumpers
For instrument start-up follow the steps listed at section
1.7
. Signal
connections are indicated at section
1.5.
Location for internal jump -
ers is indicated at section
1.9.
See below connections for thermocouple :