Grundfos SE1 50 Instrucciones De Instalación Y Funcionamiento página 30

12. Sensor check measurements
Warning
Sensor check measurements may only be made by
Grundfos or personnel authorized by Grundfos.
The values in the following table were measured on the free end
of a 10 m cable. The other end of the cable is connected to the
pump.
The values may differ if the length of the cable is not 10 m.
A grundfos sensor test box may also be used for check
measuring the sensors. Furthermore, the sensor test box gives
the response values by means of LEDs, to indicate if the sensor
is ok.
It is also possible to measure the sensors by means of a standard
instrument measuring amperes and Ohms. See figs.
Sensor check measurement
matrix, SE1, SEV pumps
Sensor
Pt1000 and thermistor
PTC sensor
WIO sensor
Moisture switch
Note: (Cables with 10 wires)
12.1 Check measurement using a standard instrument
Warning
Do not use a megohmmeter for checking
measurements as this will damage the control circuit.
If the measured value is in Ω, disconnect the conductors from
IO 111.
If the measured value is in mA, disconnect conductor 6(9) from
P5 and connect the standard instrument to 6(9) and P5.
PUMP
(10-core cables)
4(7)
Pt 1000
T
5(8)
M
6(9)
WIO
T = Thermal switch
M = Moisture switch
Fig. 24 SE1, SEV pumps with Pt1000
30
24 and 25.
4(7) 5(8) 6(9)
x x
x x
x x
x x
x x
x
x
x
x
x x
x
IO 111
P1
Internal
Ω
+15 V
P2
P3
P4
P5
mA
P5 IO 111 Value measured
1000 Ω (25 °C)
0 Ω
400 Ω
> 3000 Ω
0 Ω
x 4 mA (new oil)
x 3.5 mA (air)
x 22 mA (water)
x 0 mA
0 Ω
x 0 mA
PUMP
(10-core cables)
4(7)
PTC
5(8)
M
6(9)
WIO
M = Moisture switch
Fig. 25 SE1, SEV pumps with PTC sensor
Response
OK
Alarm
OK
Alarm
Alarm
OK
Alarm
Warning
Warning
Alarm
Warning
IO 111
P1
Internal
Ω
+15 V
P2
P3
P4
P5
mA