Degaussing And Sensor Resistance Check; Degaussing; Sensor Resistance Check - Mettler Toledo InPro 7200 Serie Instructions D'utilisation

InPro 7200 Series
6

Degaussing and Sensor Resistance Check

6.1

Degaussing

To degauss a sensor, use a degaussing tool such as that used
for erasing magnetic tape. With degaussing tool power on, bring
the tool close to the sensor and move the tool slowly around the
sensor in close proximity. Then slowly move the tool away from
the sensor (min. 20 cm). Turn tool power off.
6.2

Sensor Resistance Check

Note: Use a high impedance meter when making these checks
because a low impedance meter can cause the probe to beco-
me magnetized. Refer to Figure 8 for sensor cable resistances.
Sensor cable resistances
Flow cell
SEC
RTD
Power ground
provided through
conduit
© 08/04 Mettler-Toledo GmbH, CH-8606 Greifensee
Printed in Switzerland
PRI
Connection
1 to 2
1 or 2 to 3
1 or 2 to 4 or 5
4 to 5
4 or 5 to 6 or 7
6 to 7
Figure 8: Sensor cable resistances
Resistance Ω
0 (short)
infinite
infinite
0 (short)
infinite
100 kΩ, ±1% at 25 °C (77 °F) for sensor
InPro 7200 and InPro 7202
109.7 kΩ, ±1% at 25 °C (77 °F) for sensor
InPro 7201
jacketed cable
black
white
Drain 1
red
Drain 2
brown
blue
InPro 7200 Series
52 001 408
17
1
2
3
4
5
6
7