Fema C Series, Руководство пользователя, Страница: 9 / 32

FEMA ELECTRÓNICA . Series C . C40-D
9
1.13 Measuring with Pt and Ni probes
• Accepted Pt and Ni probes
The instrument accepts connection of Pt100, Pt500 and
Pt1000 temperature probes, and also Ni100, Ni200 and
Ni1000 temperature probes. Temperature ranges for
each type of probe are indicated on ‘Table 11’ below.
• Pt100 with 2 and 3 wires
The instrument accepts connection for 2 and 3 wire Pt100 probes.
For 3 wire Pt100 probes, configure internal jumper ‘T’ at position 5-6
(see section 1.9).
For 2 wire Pt100 probes, configure internal jumper
‘T’ at position 4-5. Compensation of the wire resistance for 2 wire
probes can be manually configured with the parameter ‘
Offset read-
ing
’ (‘
oFFS
’)
(see section 1.22)
which allows to configure a fixed num -
ber of counts to be added to the reading.
•
Resolution and units
The temperature resolution using Pt and Ni temperature probes is
configurable to 1º or 0.1º. 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.
• Alpha temperature coefficient
The instrument accepts Pt probes (Pt100, Pt500, Pt1000) with ‘ Al-
pha ’ parameter of ‘ 0.0385 ’ and ‘ 0.0390 ’ (see section 1.29.7) . This pa -
rameter is associated to the specific model of probe installed.
Sensor Jumper ‘S’
(see section 1.9)
Jumper ‘T’
(see section 1.9)
Range in ºC
(in ºF)
Total error Connection
(
terminals)
Current at
sensor
Pt100 3 wires F H J 5-6
-200 / 700 ºC
(-328 / 1292 ºF)
<1º
2 (Pt+)
4 (Pt -)
5 (sense)
< 900 uA
Pt100 2 wires F H
4-5
-200 / 700 ºC
(-328 / 1292 ºF)
2 (Pt+, Ni+)
4 (Pt -, Ni-)
Pt500 F
-150 / 630 ºC
(-238 / 1166 ºF)
< 90 uA
Pt1000 F
-190 / 630 ºC
(-310 / 1166 ºF)
< 90 uA
Ni100 F H
-60 / 180 ºC
(-76 / 356 ºF)
< 900 uA
Ni200 F H
-60 / 120 ºC
(-76 / 248 ºF)
< 900 uA
Ni1000 F
-60 / 180 ºC
(-76 / 356 ºF)
< 90 uA
Table 11 - Ranges of temperature for Pt and Ni probes
• Terminal 5 ‘multifunction’ - ‘Pt100 3 wire’ or ‘External control’
To configure for 3 wire Pt100 probes, set internal jumper ‘T’ at posi -
tion 5-6 (see section 1.9). Terminal 5 will be assigned to the connec -
tion of the third wire of the Pt100 probe, for automatic wire resis -
tance compensation purposes, up to 30 R.
To configure for 2 wire Pt100 probes, set internal jumper ‘T’ at posi
-
tion 4-5
(see section 1.9).
Terminal 5 will be configured as ‘EK’ exter -
nal 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 a list of typical connections :
Pt+, Ni+
Pt-, Ni-
1 2 3 4 5
• other probes 2 wires • Pt100 3 wires
Pt-
Sense
Pt+
1 2 3 4 5