Ph Controller Settings - Veris U3 Operating Instructions Manual

pH Controller Settings

These system settings can be found under Options pH Controller Setup
Figure 19
This example shows the pH sampling pattern on a 200' by 200' (61 m) grid, which is slightly denser than a 1
acre (.4 ha) grid. The EC-OM transects are 50 ft (15 m) apart and the pH samples are collected from every
fourth transect.
Figure 18
Wash Time – Amount of time wash water sprays
the electrodes at the end of a pH cycle. Default is 1
second. If issues arise with electrode cleaning in
sticky soils, increase to 2 or 3 seconds)
Max Measurement time – Maximum time for
electrodes to record before rejecting sample. The
range of this value can be 12-20 seconds. Default
is 12 seconds. If over 30% of readings time out
before settling, increase time to 15-18 seconds.
Min Distance between samples -- This sets he
minimum sampling density in automatic mode. This
threshold keeps the sampler from cycling close to
an existing pH sample point. Default is 10 meters.
Target distance between samples (m) – Distance
at which the software will flag the operator to stop
and take a sample in Automatic mode. Default is
65 meters, which equates to about 1 point per acre.
Other distances and per acre/hectare equivalents:
Sample Grid size
.5/ac or .2/Ha
.625/ac or .25/Ha
1/ac or .4/Ha
4-7
Distance Distance
(m) (ft)
45
50
65
Figure 20
Pub# OM20-U3-pH
150
165
215