Oyster-10, V1.9 11/09
4
pH Measurement and Temperature Compensation
1. Use
the
pH/mV
button to select the pH mode. The unit of measure appears on the
LCD.
2. Connect the pH electrode to the meter and place the sensor end in the solution under
test.
3. For automatic temperature compensation, connect the temperature probe to the meter
(display will read ATC) and place the sensor end in the solution about 1/3 of the way
below the solution surface. The temperature reading of the solution appears on the
bottom of the LCD. When the temperature of a sample differs from a buffer solution
temperature, allow enough time for the electrode to stabilize to the sample's
temperature.
4. For manual temperature compensation, a temperature sensor is not connected to the
meter (MANUAL is displayed). Adjust the meter’s temperature display with the
up/down
buttons so that the displayed temperature matches the temperature of the
solution. A manual thermometer will be needed to determine the solution temperature
first.
5. To change the unit of measure for temperature (C to F or F to C), press and hold the
pH/mV
button while powering the meter. The LCD reflects the unit of measure.
6. Read the pH measurement on the main display. An out of range reading is indicated by
dashes ( ----- ).
7. When the test is complete, unplug the electrode and rinse it in distilled water.
8. Place approx. 1 ml of pH 4 solution or tap water in the wetting cap before replacing it.
mV (ORP) Measurements
1. Note that calibration is not required for mV measurements.
2. Use
the
pH/mV
button to select the mV mode. The display will reflect the unit of
measure.
3. Remove the wetting cap from the ORP electrode and connect the cable via the BNC
meter connection.
4. Rinse the ORP electrode and place it into a sample solution. When the LCD stabilizes
it will read the redox potential of the sample in millivolts.
5. When sampling is complete, unplug and rinse the electrode. Place a small portion
(1ml) of distilled water in the wetting cap. Place the cap over the electrode.
25-Reading Measurement Storage
1. Press
the
STORE/RECALL
button to store the current reading. Press each time a
reading is to be stored.
2. If an attempt is made to store more than 25 readings, the stored readings (starting with
the first reading) will be overwritten.
3. To recall readings, press and hold the
STORE/RECALL
button until the ‘RECALL’ icon
appears on the LCD. Use the up/down arrow buttons to scroll through the stored
readings. Note that ‘NULL’ is displayed if there are no readings in memory.
4. To exit this mode, press and hold the
STORE/RECALL
button until the ‘RECALL’ icon
disappears.
5. To clear the contents of the memory press and hold the
up
and the
down
arrow
buttons while powering the meter on until the ‘CLr’ icon appears on the LCD. All 25
locations will be erased.
Note: Readings are stored in non-volatile memory (saved when the meter is turned off).
