Figure 9.
Figure 10.
6.3
Temperature Measurement
The SP-710 has two platinum RTDs located in the main module sample cell and the pH/ORP sample cell.
The temperature sensors are individually calibrated in the factory and do not need to be calibrated during
use. The temperature values measured are used in the conductivity temperature compensation and in
converting the measured cell potential to the pH value at the sample temperature.
6.4
pH/ORP Measurement
6.4.1
Measurement Procedure
Follow the steps below to measure pH and ORP:
1. Rotate the pH/ORP cell seal to touch the front face of the module as seen in Figure 5. This is to power
on the module. The indicator light of the module will be green and flashing when powered on. After
the module is turned on, the seal can be positioned anywhere desired.
*
NOTE
*
If the module battery capacity is low, the indicator light will flash red .
2. Press
Measure
(
) as needed to highlight
pH/ORP
in the selection menu.
3. Press
to launch the
pH/ORP MEASUREMENT
screen.
4. The main module of the SP-710 will automatically connect after the pH/ORP module has been pow-
ered up.
5. Rinse the pH/ORP sample cell three times with the sample to be tested. Fill the sample cell with the
sample.
6. The pH and ORP values will be updated every two seconds on the SP-710 main module display. The
values will be displayed in white with a
blue background
once a stable value is reached (Figure 11).
*
NOTE
*
If the pH/ORP module powers off or was not powered on to begin with (see
step 1) an instruction message will be promoted on the screen showing how to turn
on the pH/ORP module (Figure 12).
SP-710 User Manual
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