Veris Technologies pH Detector - Operating Instructions - Manual (Page 20)

OM17-pH Detector
3-10
Figure 29
Allow the sampler to remain in the soil while the readings settle, as indicated by the In Progress
red LED (Figure 30). When the Done green LED lights, the measurement is complete (Figure 31).
The pH readings on the display show what the electrode is reading at every second. The minimum
recording time is 7 seconds; the maximum time is determined in the pH settings menu. The pH
value that is recorded is the final values at the end of the logging duration. The final pH value is
logged along with the DGPS position where the sample was collected. When the Ready green
LED lights, release the brake and raise the probe chamber out of the soil and the electrode holder
out of the probe chamber. A spring-loaded pin will hold the probe in the top position for automated
electrode cleaning. DO NOT MOVE VEHICLE WHEN PROBE IS IN SOIL.
Figure 30 Figure 31
If the electrodes take longer than 10 seconds to settle, a warning will appear by the readings that
indicates the number of seconds the reading has required (Figure 32). When the maximum log
time is reached, a T will appear indicating that the measurement has ‘timed out’, and the unit
initiates a new sample cycle (refer to pH Controller settings for adjusting the log time).
Figure 32
This time warning is to let the operator know that a measurement cycle is requiring excessive time.
While an occasional cycle may exhibit this warning. see the troubleshooting section if this occurs
frequently.