HydroSense II Soil Moisture Measurement System
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10.1.2
How to replace the battery pack
The process to replace the battery pack is as follows:
Place the HydroSense II face down on a clean dry surface.
Remove the four (4) Philips screws on the back of the HydroSense II
case with the Philips screwdriver provided in the carry case.
Carefully separate the back cover from the front cover, taking care to
keep the HydroSense face down. If the unit is turned face up, the
battery holder inside may fall out. This may lead to damage of the
battery wires.
Unclip the battery connector from the battery holder. This connector
looks similar to the terminals of a 9V PP3 battery.
Do not connect a 9V battery to the battery terminals. This may cause permanent
damage to the HydroSense II. Damage of this kind is not covered under
warranty.
Connect the spare battery holder to the battery connector.
Carefully replace the back cover of the HydroSense II and replace the
four (4) Philips screws.
Turn over the HydroSense II and hold the power button to activate.
10.2
Rod installation/replacement
Threaded inserts in the epoxy body of the CS658 and CS659 allow user
replacement of the stainless steel rods. Initially, these rods are fitted at the
factory and with normal use should provide years of trouble free service,
however sometimes insertion into rocky soils can lead to bending of the probes.
Bent rods should be straightened or replaced as soon as possible since non-
parallel rods can introduce error and can lead to more serious bending or
breaking. Small bends can often be straightened by hand, but more serious bends
may require probe replacement to avoid instrument downtime. Spare rods can be
purchased from your local agent.
The rods have a hexagonal nut-like collar at the base of the unthreaded portion.
When threaded into the sensor body, this collar distributes lateral forces over a
relatively large area to reduce rod bending/deformation during probe insertion
for measurements. The rods must be fully threaded into the sensor body with the
collar in full contact with the probe body. The nut should be tightened using the
open-ended wrench provided with the HydroSense II.
