Maintenance, Fault Finding, And Repair; Maintenance; Hints For Fault Finding; Transducer Resistance Measurement - Emerson Machinery Health PR 9268 Series Installation Manual

Installation Guide
MHM-97479
5

Maintenance, fault finding, and repair

5.1

Maintenance

The transducer does not require any maintenance during operation.
5.2

Hints for fault finding

CAUTION
Any work on the system may impair machine protection.
If a problem occurs, perform the tests described in
Insulation resistance
5.2.1

Transducer resistance measurement

Procedure
1. Disconnect the transducer.
2. Use a resistance meter to measure the resistance between pin 2 and pin 3 of the
3. Reconnect the transducer or install a new one in case of a defect.
5.2.2

Insulation resistance measurement

Procedure
1. Disconnect the transducer.
2. Measure the insulation resistance.
MHM-97479, Rev. 3.6
measurement, and
Harting connector or between the blue wire and green wire if the transducer has an
open cable end. Table 5-1
Table 5-1: Meaning of resistance values
Resistance values
PR 9268/01x-x00 PR 9268/20x-x00
and PR 9268/30x-
x00
0 Ω 0 Ω
1723 Ω ±2 % 1875 Ω ±10 %
∞ Ω ∞ Ω
Maintenance, fault finding, and repair
Transducer resistance
Signal generation check
displays resistance values and their meaning.
PR 9268/60x-000
and PR
9268/70x-000
0 Ω
3270 Ω ±10 %
∞ Ω
November 2022
measurement,
for a first fault analysis.
Meaning / Error
Short circuit
Transducer OK
Cable break
Connection to the
transmitter has been
interrupted
31