Pyxis SP-710B, User Manual

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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-710B will default to the PTSA and conductivity measurement mode. A water
sample should be transferred to the main module sample cell using a disposable pipette, or the cell can be
filled slowly from a sample bottle.
*
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 cell at least three times.
Allow 5–10 seconds for the SP-710B 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-710B had been equilibrated (stored).
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