Pyxis 50352, Руководство пользователя

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5.4 pH/ORP Module On/Off
The module is turned on by rotating the pH/ORP cell seal to touch the front face of the module as seen in
Figure 5. A sealed magnet within the rubber seal will trigger the module power circuit. The pH/ORP module
will turn itself off when either commanded by the main module or automatically based on the default or
customized idle time limit setting. The purpose for this design is to extend battery life.
If pH/ORP measurement is not needed, the module does not need to be turned on.
Figure 5.
6 Measurement
6.1 PTSA and Conductivity Measurement
6.1.1 Measurement Procedure
When powered on, the SP-710 will default to the PTSA and conductivity measurement mode. The water
sample can be transferred to the main module sample cell using a pipette or filled directly from a faucet,
sample bottle, or sample valve.
*
NOTE
*
Special care should be taken when pouring the sample into the cell to avoid air
bubble entrainment, which can interfere with reading accuracy.
Before beginning a measurement, use the sample water to rinse the main module sample cell at least three
times. Allow 5–10 seconds for the SP-710 to stabilize. The values will be displayed in white with a blue background
if a stable value is reached (Figure 6). For a sample with conductivity in the range of 100 to 6000 µS/cm,
the measured value should be stabilized in the range of 98–102 to 5940–6060 µS/cm, respectively. For a
sample containing 100 ppb PTSA, the measured PTSA should be stabilized within the range of 98–102 ppb.
*
NOTE
*
The time required to reach a stable reading may be slightly longer if the water
sample temperature is significantly different than the environmental temperature at which
the SP-710 had been equilibrated (stored).
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