Nova-Tech pH-CON 10 - Manual (Page 22)

Instruction Manual PC 10
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8 . T R O U B L E S H O O T I N G
Problem Cause Solution
No display when
turned on 1. Batteries not in place.
2. Batteries not in correct polarity
(+ and -).
3. Weak batteries
1. Check that batteries are in place
and making good contact.
2. Reinsert batteries with correct
polarity.
3. Attach optional AC adapter (only
for Standard PC 10 meter) or
replace batteries.
Unstable readings 1. Air bubbles in probe.
2. Dirty probe.
3. Probe not deep enough in
sample.
4. External noise pickup or
induction caused by nearby
electric motor.
5. Broken probe.
6. Temperature is changing
1. Tap probe to remove bubbles.
2. Clean the probe and recalibrate.
3. Make sure sample entirely covers
the probe sensors.
4. Move or switch off interfering
motor.
5. Replace probe. See page 21.
6. Wait for temperature reading to
stabilise.
“OR” on upper
display 1. Probe is shorted.
2. Probe is in an out-of-range
solution.
3. Broken probe.
1. Test probe. Make sure probe is
fully connected to meter.
2. Use different solution.
3. Replace probe. See page 21.
Temperature
reading erratic or
lower display reads
“OR”. 1. Temperature sensor is dirty.
2. Temperature of solution is out
of range.
1. Clean temperature sensor with
isopropyl alcohol.
2. Heat or cool solution.
Slow response 1. Dirty / Oily probe. 1. Clean probe. See “Probe Care &
Maintenance”, page 19.
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