9
W
Ar
NiNG
& Err
Or
mESSAGES
Refilling the Electrode
• To remove the electrode sleeve, carefully rotate and slide it off (A). Set it to one side.
Note:
Handle the probe with care, the pH electrode stem is made of glass.
• Rinse off any traces of electrolyte gel from sleeve. Soak the electrode tip in
HI700601
General purpose cleaning solution (or
HI700661
,
HI700663
,
HI700664
) for
20 minutes. Rinse with distilled or deionized water.
• Refill the reference well with
HI9071
Gelled bridge electrolyte (B).
• Replace the sleeve. Ensure the O-ring is fixed inside the electrode. Rinse off excess gel
with distilled or deionized water.
• Shake the probe down gently to eliminate any trapped air bubbles.
• Soak the probe in
HI70300
Electrode storage solution for a minimum of 30 minutes before calibrating.
Storage
To ensure a quick response, the glass tip and junction should be kept hydrated.
When not in use, add a few drops of storage solution to the storage cap. If storage solution is not available, pH 4.01 or
pH 7.01 buffer can be used.
Note:
Do not store the electrode in distilled or deionized water.
11. WARNING & ERROR MESSAGES
----
WRNG
“---- WRNG” displayed during calibration.
Invalid buffer.
Check the buffer value and use fresh buffer.
12.02
23.7
Measured value displayed blinking.
Measured value is out of electrode range.
Clean the electrode to improve condition.
!
8.02
23.7
Battery icon (
!
) displayed blinking.
Battery is below 10 %, replace the battery.
BAtt
DEAD
“BAtt DEAD” and tester turns off.
Depleted battery, replace the battery.
12. ABBREVIATIONS
ATC
Automatic Temperature Compensation
GLP
Good Laboratory Practice
MTC
Manual Temperature Compensation
NIST National Institute of Standards and Technology
A
B
