16
Z0X-2 Series Z-tron III
TM
Point Level Control
5.5 Possible Problems and Causes
Problem
Possible Cause
Solution
1. Instrument indicates
alarm at all times.
a. Severe coating build upon
sensing element (HLFS).
b. Sensing element not
“seeing” material (LLFS)
due to fill angle.
c. Defect in sensing element.
d. Loss of power.
e. Improper relay wiring.
f. Improper calibration.
g. Electronic unit
malfunction.
h. Shorted sensor.
i. Water in housing or
conduit.
a. Need longer Cote-Shield.
Consult factory.
b. Need longer insertion
length. Consult factory.
c. See Section 5.3.
d. Check power wiring.
See Figure 2-4.
e. See Section 2.5.
f. See Section 4.
g. See Section 5.2.
h. See Section 5.3.
i. Consult factory.
2. Instrument never
indicates alarm.
a. Severe coating build-up on
sensing element (LLFS).
b. Sensing element not
“seeing” material (HLFS)
due to fill angle.
c. Improper wiring.
d. Improper calibration.
e. Electronic unit
malfunction.
a. Need longer Cote-Shield.
Consult factory.
b. Need longer insertion
length. Consult factory.
c. See Section 2.
d. See Section 4.
e. See Section 5.2.
3. Instrument can’t be
calibrated.
a. Improper wiring.
b. Insufficient signal from
sensing element.
c. Setpoint is beyond the
tuning range of the
electronics.
d. Electronic unit
malfunction
e. Sensor covered with
conducting material.
a. See Section 2.
b. Need longer insertion
length. Consult factory.
c. Consult factory.
e. See Section 5.2.
4. Instrument gives a false
alarm.
a. Improper calibration.
b. Loose wiring.
c. Electronic unit
malfunction.
d. Time delay required.
e. Intermittent short of
sensor.
a. See Section 4.
b. See Section 2.
c. See Section 5.2.
d. Consult factory.
e. See Section 5.3.
5. Instrument operates
intermittently.
a. Improper calibration.
b. Loose wiring.
c. Electronic unit
malfunction.
d. Dielectric (k) of material
is too low.
a. See Section 4.
b. See Section 2.
c. See Section 5.2.
d. Need high sensitivity unit.
Consult factory.
