Instruction manual

Instruction Manual PC 510
15
6.1.3 Taking pH Measurements
Be sure to remove the electrode storage bottle or protective rubber cap
on the electrode before measurement.
To take readings:
1. Rinse the pH electrode with de-ionised or distilled water before use
to remove any impurities adhering to the probe body. If the pH
electrode has dehydrated, soak it for 30 minutes in electrode
storage solution or 2M – 4 M KCL solution (sold separately).
2. Press ON to switch meter on.
3. Press the MODE key to select pH measurement mode. The MEAS annunciator appears on the
top center of the LCD. The ATC indicator appears in the lower right-hand corner to indicate
Automatic Temperature Compensation.
NOTE
: For pH manual temperature compensation, you must disconnect the conductivity cell from the
6-pin connector. The ATC indicator will disappear form the display. You also need to set a manual
temperature compensation value. See Section 6.2.2: Manual Temperature Compensation on page 16.
4. Dip the probe into the sample. Since the conductivity cell contains the temperature sensor, make
sure it is also immersed in your solution.
When dipping the probe into the sample, the sensor or the glass bulb of the electrode must be
completely immersed into the sample. Stir the probe gently in the sample to create a homogeneous
sample.
5. Allow time for the reading to stabilise. Note the reading on the display. If the READY indicator is
selected on, it will appear when the reading is stable. See below for more information.
Taking measurements with READY indicator selected on
If the READY indicator has been activated, the READY annunciator lights when the reading is stable *.
Switch the READY indicator on or off in SETUP program P3.1. See page 28 for directions.
* The READY indicator appears and the reading holds until the measured value exceeds the tolerance
(±0.02 pH; +0.8 mV < 400; ±1.2 mV > 400). Then READY annunciator turns off.
Taking measurements with the auto endpoint feature selected on
When a reading is stable for more than 5 seconds, the auto endpoint feature will automatically “HOLD”
the reading. The “HOLD” indicator appears on the left side of the display. Press the HOLD key to
release the reading. Switch the Auto endpoint feature on or off in SETUP program P3.1, see page 28
for instructions.
6.2 Taking Conductivity or TDS Measurement
6.2.1 Automatic Temperature Compensation
For automatic temperature compensation (ATC), simply plug the
conductivity probe into the meter (see page 5 for directions). The ATC
indicator will light on the LCD.
NOTE
: If the ATC indicator does not light, manual temperature
compensation may be selected in the meter’s SETUP mode. See
Program P7.3 on page 35 for directions on selecting Automatic
Temperature Compensation.
Figure 15: Measurement mode
Figure 16: ATC annunciator will
light up when connected to
temperature probe
MEAS
pH
ATC
°C
8.23
21.3
MEAS
READY
ATC
°C
1402
24.5
µ S