Fema C Series, User Manual, Page: 10 / 32

FEMA ELECTRÓNICA . Series C . C40-D
10
• Accepted NTC probes
The NTC probe is a temperature variable resistor with a
temperature - resistance curve defined by two param -
eters called ‘R25’ and ‘beta’. By default, the instrument
is configured for a standard NTC with ‘R25’ of 10K and
‘beta’ of 3500. The measured temperature ranges from -60 ºC to
150 ºC.
Different NTC probes can be used, by configuring the instrument for
different values of ‘R25’ and ‘beta’. The instrument measures resis -
tance from 100 R up to 1 MOhm. Use
‘Table 12’
to write down values
for your NTC.
• Parameters ‘R
25
’ and ‘Beta’
The instrument accepts values of ‘beta’ between 2500 and 5500, and
values of R25 between 1.0 K and 200.0 K
• Resolution and units
The temperature resolution using NTC temperature probes is con -
figurable to 1º or 0.1º. Reading can be configured in ºC (degrees Cel -
sius) or ºF (degrees Fahrenheit).
Range
of measure
NTC probe
Temp. R25 Beta
100 R
1 MR
Table 12 - Data from NTC datasheet
• 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.
• 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 NTC probe :
1.14 Measuring with NTC probes
NTC ‘R
25
’*
( configurable)
Jumper ‘S’
(see section 1.9)
Jumper ‘T’
(see section 1.9)
Range
of measure
Accuracy
(% of reading)
Connection
(
terminals)
Beta*
(configurable)
10K F K 4-5
from -60 ºC
to 150 ºC
<1.5% of
reading
2 (NTC +)
4 (NTC -)
3500
Table 13 - *‘Beta’ is configurable from 2000 to 5500. ‘R25’ is configurable from 1.0 K up to 200.0 K.
ntc +
ntc -
1 2 3 4 5
1.15 Measuring with PTC probes
• Accepted PTC probes
The instrument accepts direct connection of PTC
probes. Accepted PTC probes are listed at ‘Table 14’.
• Resolution and units
The temperature resolution using PTC temperature probes is con -
figurable to 1º or 0.1º. Reading can be configured in ºC (degrees Cel -
sius) or ºF (degrees Fahrenheit).
Family Sensor Jumper ‘S’
(see section 1.9)
Jumper ‘T’
(see section 1.9)
Range in ºC
(in ºF)
Total error
KTY 121 KTY81-121
KTY82-121
F
4-5
-55 / 150 ºC
(-67 / 302 ºF)
<1º KTY 210 KTY81-210
KTY82-210
FHK
KTY 220 KTY81-220
KTY82-220
FHK
Table 14 - Ranges of temperature for PTC probes
• 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.
• Terminal 5 ‘multifunction’ - External control
Terminal 5 remains configured as ‘EK’ external control function. See
section
1.9
for a list of available functions.
ptc +
ptc -
1 2 3 4 5
•
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.
Loca -
tion for internal jumpers is indicated at section
1.9.
See below connections for PTC probe :