Hanna Instruments Edge - Page 83

Maintenance
83
Symptoms Problems Solution
If the display shows:
“mV” and “-1000” or
“1000” blinking.
Out of range in the mV
scale.
A) Verify the shipping cap has been
removed.
B) Make sure the sample pH is within
specied range.
C) Verify electrolyte level in pH sensor
is topped o.
D) Verify no bubbles inside pH
membrane.
The meter does not
measure temperature.
“----” is displayed on 2nd
LCD line.
Broken temperature
sensor.
Replace the probe.
The meter fails to
calibrate NaCl.
Incorrect EC calibration.
Recalibrate the meter in EC range. Set
cell constant to 1.
The meter fails to
calibrate or gives faulty
readings.
Broken pH electrode. Replace the electrode.
At startup the meter
displays all LCD tags
permanently.
One of the keys is stuck.
Check the keyboard or contact your
local Hanna Oce
CAL “Prod” message at
startup.
Instrument was not
factory calibrated or lost
factory calibration.
Contact Hanna Technical Support for
help.
Troubleshooting
Guide