Thermo Fisher Scientific Alpha COND 560 - Manual (Page 41)

35
8 TRO UBLE SHOO TIN G
Problem
Cause
Solution
Power on, but no
display a) Loose connections
b) Incorrect output voltage
of the power adaptor
c) Cables not in correct
polarity (+ and – position)
a) Ensure cables make good
contact
b) Use an power adaptor with
specified output voltage
c) Re-wire loop cables with
correct polarity
Unstable conductivity
reading a) Air bubbles in the probe
b) Dirty probe
c) Probe not deep enough
in sample
a) Tap probe to remove air
bubbles
b) Clean probe and
recalibrate
c) Ensure that the sample
entirely covers the sensor
of the probe
Oscillating
temperature readings a) Electrical noise
interference
a) Ensure shield wire is
properly connected to pin 7
Slow response a) Dirty / Oily probe a) Clean probe
Blinking ATC a) No temperature probe
connection during ATC
mode a) Ensure temperature
sensing cable makes good
contact
Blinking electrode
annunciator a) Error in calibration
b) Conductivity value of the
calibration standard is not
within acceptable range
a) Ensure calibration
standard solution is not
contaminated. Ensure
electrode is clean
b) Ensure calibration
standard is within 10 to
100% of full-scale of the
selected measuring range
Or (Conductivity) a) Conductivity reading is
above the selected
measuring range a) Ensure correct conductivity
measurement range is
selected
Or/Ur (Temperature) a) Temperature probe is not
connected when ATC
enabled
b) Temperature value
exceeds above/ below
the specified range
a) Ensure electrode makes
good contact with
controller
b) Ensure temperature
calibration is done
properly. Ensure process
temperature is within the
specified range