41
Problem
Cause
Solution
General Troubleshooting
Nothing is displayed when
A.
AC outlet power not
A.
Switch on the power supply
the ON/OFF key is selected.
switched on.
B.
AC adapter socket not
B.
Re-insert AC adapter socket.
inserted properly.
pH Troubleshooting
Unstable reading
A.
Insufficient reference
A.
Fill electrode with reference
electrolyte in electrode.
electrolyte.
B.
Broken electrode.
B.
Replace electrode.
C.
Electrical field
C.
Remove or switch off
interference (electrical
interfering device.
noise caused by a
nearby motor or
ultrasonic device).
D.
Dirty probe
D.
Clean the electrode.
Hydrate if needed.
Slow response
A.
Dirty probe
A.
Clean electrode. Hydrate
if needed.
No response
A.
HOLD mode in operation
A.
Cancel HOLD mode. Press
from keypad.
Hold displayed. See LCD.
Hold button.
B.
Internal program error.
B.
Reset all internal programs
by removing A/C adapter
from meter and re-inserting
Conductivity/TDS Troubleshooting
Unstable reading
A.
Air bubbles in cell.
A.
Tap cell to remove bubbles.
B.
Dirty probe.
B.
Clean probe and recalibrate.
C.
Low conductivity
C.
Avoid atmospheric contact
with solution.
D.
External noise pickup.
D.
Move away from noise.
E.
Broken probe.
E.
Replace probe.
“OR” on upper display
A.
Probe is shorted.
A.
Test probe.
B.
Probe is in too-high
B.
Use different solution or
conductivity solution
select different range.
for range.
Temperature reading erratic or
A.
Oxidation of temperature
A.
Clean connector with
lower display reads “OR”
probe connector.
alcohol.
B.
Temperature of solution
B.
Heat or cool solution.
is out of range.
Not able to calibrate
A.
Dirty/Oily probe.
A.
Clean probe. See “Probe
Care & Maintenance” in
instruction manual.
B.
Incorrect probe
B.
Adjust for cell constant
cell constant
or replace probe.
C.
Contaminated or
C.
Replace standards
inaccurate standards
Troubleshooting
troubleshooting
electrode
care
measurement
calibration
starting up
set up
mode
return of
items
warranty
accessories
specifications
appendixes
