E3A-JA3A-F11 Datasheet, PDF (40/60 Pages) Magnetrol International, Inc. – Liquid Level Displacer Transmitter

Figure 18
LVDT Six-Pin Connector
8.3.2 Checking the LVDT Winding Resistance
WARNING: To prevent ignition of explosive atmospheres,
disconnect power before servicing.
Refer to Figure 18 during this procedure.
1. Remove power from the unit.
2. Remove the electronics housing cover and the electronics
bezel assembly.
3. Disconnect the six-pin connector J1 from the back of the
PC board assembly.
4. Using a multimeter, check the primary winding by verifying
that pins 1 and 4 of the six-pin connector have approxi-
mately 75 to 105 ohms resistance.
5. Check the secondary winding by verifying that pins 2 and
5 or pins 3 and 6 of the six-pin connector have approxi-
mately 70 to 100 ohms resistance.
6. If the winding resistance is out of range, replace LVDT.
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48-640 E3 Modulevel Displacer Level Transmitter - FOUNDATION fieldbus^™