Instructions Manual

Pub. #OM17-MSP3
4-8
pH Controller Set-up
After calibration, you may wish to change the pH Controller default parameters.
Enter menu option 2) pHsetup
Figure 26
Enter menu option2) Controller setup
Figure 27
Figure 28
Sampling time is the duration that the sampler assembly is in the soil. Typically 2 seconds is
adequate. In soil conditions that do not produce a firm core, this time may need to be set at 3
seconds in order to allow soil to begin flowing through cutting shoe. If soil conditions result in a
very firm core, the sampling time may be reduced to 1 second. In rocky conditions, use 1 second
sample time to reduce likelihood of sampler shoe damage. Press 1 or 2 to adjust the sample time,
press 3 to continue to the next screen.
Figure 29
Maximum log time is the longest time in seconds the pH controller will wait for the pH readings to
settle. The controller usually cycles before this maximum time is reached. The minimum setting
for the maximum log time is 20 seconds. (Tip: use 20 seconds unless there is a special reason to
allow a longer wait time) Press 1 or 2 to adjust the sample time, press 3 to continue to the next
screen.