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eutech-instruments waterproof cyberscan con 400410 & tds 400 conductivitytds meter User Manual

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Page of 56
Instruction Manual 
 
CON 400/410 
- 41 - 
9  
T R O U B LE   S H OO TI NG   G UI D E  
Problem Cause 
Solution 
No display when 
turned ON 
a)  Batteries not in place or 
battery housing is not 
attached to meter correctly 
b)  Batteries not in correct 
polarity (+ and – position).  
c) Weak 
batteries 
a)  Check that batteries are in 
place and making good 
contact.  
b)  Re-insert batteries with 
correct polarity.  
c)  Replace batteries.  
Unstable readings 
a)  Air bubbles in probe. 
b)  Dirty probe.  
c)  Probe not deep enough in 
sample.  
 
d)  External noise pickup or 
induction caused by nearby 
electric motor.  
e)  Broken probe.  
f)  probe guard not in place 
a) 
Tap probe to remove 
bubbles.  
b) 
Clean the probe and re-
calibrate.  
c) 
Make sure sample entirely 
covers the probe sensors.  
d) 
Move or switch off 
interfering motor.  
e) 
Replace probe.   
f) 
Attach probe guard 
Slow response 
a)  Dirty / Oily probe.  
a) 
Clean probe. See “Probe 
Care & Maintenance”, page 
40.