33
502-3000 Series Ztron
TM
Point Level Control
Troubleshooting
5.7 Possible Problems and Causes
ProblemPossible Cause
Solution
1. Instrument indicates
a. Severe coating build-up
a. Need longer Cote-Shield.
alarm at all times.
on sensing element (HLFS).
Consult factory.
b. Sensing element not “seeing” b. Need longer insertion
material (LLFS) due to fill
length. Consult factory.
angle.
c. Defect in sensing element.
c.
See section 5.3.
d. Loss of power.
d. Check power wiring.
See Figure 2-4.
e. Improper relay wiring.
e. See section 2.4.
f. Improper calibration.
f.
See section 4.
g. Electronic unit malfunction. g. See section 5.2.
h. Shorted sensor.
h. See section 5.3.
i. Shorted coax.
i.
See section 5.4.
j. Water in housing or conduit. j.
Consult factory.
2. Instrument never
a. Severe coating build-up
a. Need longer Cote Shield.
indicates alarm.
on sensing element (LLFS).
Consult factory.
b. Sensing element not “seeing” b. Need longer insertion
material (HLFS)due to fill
length. Consult factory.
angle.
c. Improper wiring.
c.
See section 2.
d. Improper calibration.
d. See section 4.
e. Electronic unit malfunction. e. See section 5.2.
f. Open coax.
f.
See section 5.4.
3. Instrument can’t be
a. Improper wiring.
a. See section 2.
calibrated.
b. Insufficient signal from
b. Need longer insertion
sensing element.
length. Consult factory.
c. Setpoint is beyond the
c.
Consult factory.
tuning range of the electronics.
d. Electronic unit malfunction. d. See section 5.2.
e. Sensor covered with conduc- e. See section 5.2.
ting material.
f. Shorted sensor or coax.
f.
See section 5.4.
4. Instrument gives a
a. Improper calibration.
a. See section 4.
false alarm.
b. Loose wiring.
b. See section 2.
c. Electronic unit malfunction. c.
See section 5.2.
d. Time delay required.
d. Consult factory.
e. Intermittent short of
e. See sections 5.3 and 5.4.
sensor or coax.
5. Instrument operates
a. Improper calibration.
a. See section 4.
intermittently.
b. Loose wiring.
b. See section 2.
c. Electronic unit malfunction. c.
See section 5.2.
d. Dielectric (k) of material
d. Need high sensitivity
is too low.
unit. Consult factory.
