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Always keep pH probe wet when in storage. The probe is well protected by a
plastic bottle with soak solution in it. To use the probes, rotate the bottle and
remove the bottle away from the probe.
pH probe can be stored in a 3M KCL solution. Never use distilled water for
storage. Always rinse the pH electrode in de-ionized water before next use.
Never touch or rub glass bulb for lasting pH electrode life.
Battery Replacement
1. Turn off the meter and open the battery cover.
2. Replace the old batteries with four new AAA batteries.
USB PC Interface Capabilities
The USB cable and software are required to transfer data to a pc. The USB
port is located on the right side of the instrument. The USB cable is not
included. it can be purchased separately as an optional accessory.
The protocol is:
Format: pxx.xxpH:mxx.xxmV:Txxx.xC(F) @2007-04-18 18:48:48LRCCRLF
Baud rate: 9600 bit/sec
Data bit: 8
Stop bit: 1
Parity: none
TROUBLESHOOTING
• Power on but no display
• Make sure you press power key >0.3second.
• Check the battery conditions and replace if necessary
• Move batteries away for one minute and then re-install.
Display disappear
Check whether the low battery icon is appeared before the display is off. If yes,
replace with new batteries.
Unstable reading
• Stir the solution to make homogeneous status and make sure the sensor is
completely immersed in solution.
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