User Guide

50
10 TROUBLESHOOTING & ELECTRODE CARE
10.1 Troubleshooting
ERROR
MESSAGE
(BLINKING)
INDICATES PROBABLE CAUSE CORRECTIVE ACTION
ERR
Invalid key
sequence
Wrong key press. Select correct key
ERR
Upper/lower limit
reached
INC/DEC keys presses
beyond the allowable limits.
Reselect parameter
within limits
CAL + ERR
Unable to accept
calibration
1. Incorrect solution
conductivity/TDS value
entered.
2. Incorrect TDS factor
entered.
1. Enter the correct
TDS or conductivity
value (note the
temperature of the
calibration
solution).
2. Enter the correct
TDS factor.
PRINTER +
ERR
Printing error
1. Printer is not ready or
unable to receive data.
2. Printer is improperly
connected.
1. Ensure that printer
is set to receive
information. Check
also the SETUP
data
communication
settings.
2. Check the RS
232C port cable
connection.
Unable to
switch on
Battery problem
1. Batteries not in place.
2. Incorrect battery
orientation.
3. Weak batteries.
1. Insert batteries.
2. Place the batteries
at the correct
orientation.
3. Replace with fresh
batteries or use
A.C. adapter.