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10. CARE & MAINTENANCE
• Never immerse the tester over the maximum immersion level.
• Fresh buffers should be used for each calibration. Once the sachets are opened the buffer value can change over time.
• If the electrode is slow or sluggish, soak it in cleaning solution for 20 minutes. Rinse with water and hydrate the
electrode in storage solution for a minimum of 30 minutes before calibrating.
• If measurements are taken successively, rinse the probe thoroughly in distilled or deionized water to eliminate
cross-contamination between measurements.
Refilling the Electrode
• If the filling solution (electrolyte) is more than 1 cm (½") below the fill hole, add
solution for double junction electrodes.
• Unscrew the fill hole cover during measurements so the liquid reference junction maintains an outward flow of
electrolyte.
• The reference junction may be cleaned by lifting the PTFE sleeve. Refill sensor with fresh
Storage
To ensure a quick response, the glass tip and junction should be kept hydrated.
1. When not in use, add a few drops of storage solution to storage cap. If storage solution is not available, pH 3.00 or
pH 7.01 buffer can be used.
Note: Do not store the electrode in distilled or deionized water.
2. Place the probe tip into the cap and gently tighten the collar.
11. WARNING & ERROR MESSAGES
----
WRNG
12. 0 2
23. 7
8. 0 2
!
23. 7
BAtt
DEAD
12. ABBREVIATIONS
ATC
Automatic Temperature Compensation
GLP
Good Laboratory Practice
MTC
Manual Temperature Compensation
NIST
National Institute of Standards and Technology
"---- WRNG" displayed during calibration.
Invalid buffer.
Check the buffer value and use fresh buffer.
Measured value displayed blinking.
Measured value is out of electrode range.
Clean the electrode to improve condition.
Battery icon (
) displayed blinking.
!
Battery is below 10 %, replace the battery.
"BAtt DEAD" and tester turns off.
Depleted battery, replace the battery.
HI7082
3.5M KCl electrolyte fill
HI7082
after replacing sleeve.
9
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