8
10 Battery Replacement
①
Pull up the battery cap (might take some force).
②
Slide the battery cover along the OPEN arrow to open the cover.
③
Open the battery cover.
④
Insert the batteries
(ALL POSITIVE SIDES FACING UP)
.
⑤
Press down the battery cover and hold it.
⑥
Slide the battery cover along the LOCK arrow to lock the cover.
⑦
Close the battery cap. Make sure to push it all the way down. The tester’s waterproof
rating may be compromised if the battery cap is not tightly closed.
11 Probe Replacement
Screw off the probe ring, unplug the old probe; plug in the new probe
(make sure to align the connector's position properly), and screw on
the probe ring.
pH probes don’t last forever. Every pH probe will eventually age and
fail even if you don't use it that often. The typical service life of GroStar
pH probes is 18-24 months depending on the frequency of usage and
how well you keep it clean and properly stored.
We recommend replacing your probe at least every 18 months to ensure the best accuracy.
The nice thing about GroStar pens is that you can just buy a replacement probe instead of a
whole new tester.
12 Notes
12.1 Never store the probe in pure water such as tap water, RO water, distilled water,
deionized water, etc.
12.2 Never use your finger to touch the glass membrane or use other material to wipe it.
