Oyster10-en-US_v2.3 9/15
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Maintenance and Troubleshooting
Electrode Cleaning
The type of electrode coating that occurs over time will determine the cleaning method. Soft
coatings can be removed by vigorous stirring or by using a squirt bottle. Organic chemical coating
(hard coatings) should be chemically removed. Only in extreme cases should the bulb be cleaned
mechanically.
Battery Replacement
Install a new battery when the low battery indicator appears on the LCD.
1.
Open the calibrator’s lid as far as possible.
2.
Open the battery compartment using a coin at the arrow indicator.
3.
Replace the battery and close the cover.
Battery
Safety
Reminders
Please dispose of batteries responsibly; always observe local, state, and federal regulations
with regard to battery disposal.
Never dispose of batteries in a fire. Batteries may explode or leak.
Never mix battery types. Always install new batteries of the same type.
Troubleshooting the Meter
Meters are the least likely cause of pH measurement problems. To rule out the meter check the
following:
1. Check the 9V battery and replace it if necessary.
2. When using the AC adaptor for power, check that the line cord is firmly connected to the meter.
3. Replace the existing electrode connector with optional BNC shorting plug (shorts the ground
ring to the center pin of the meter’s BNC jack) and check the following:
a) Set the measurement mode to pH. The LCD reading should be stable.
b) Adjust the calibration control for an LCD reading of 7.00.
c) Change to the mV measurement mode. The LCD should read 0 mV.
d) Note that an out of range reading is indicated by dashes ( -------).
