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16
Installation in a Monitoring Well
CTD-Divers are normally installed below the water
level/table in a monitoring well. The depth at which a
CTD-Diver can be suspended depends on the instru
measurement range. Further information about the CTD-
range is contained in the chapter 2
First determine the length of the non-stretch suspension
cable (part no MO500) based on the lowest groundwater
level. Provide for the required additional length for
attaching the cable to the suspension eye of the Diver and
at the upper end when you cut the wire to size.
Next use cable clips (part no MO310) to attach the ends of
the cable to
To determine the distance of the pressure sensor in the
monitoring well requires the precise length of the cable to
be known, to which the distance to the location of the
pressure sensor in the Diver must be added to obtain the
overall effective cable length. This is depicted in the
diagram below.
It is also possible to install the CTD-Diver with a
communication cable (part no AS2xxx). This cable allows
you to readout the CTD-Diver at the top of the monitoring well by using a Smart Interface Cable (part
no AS346).
Note that in small diameter wells the installation and removal of the CTD-Diver may affect the water
level.
Installation in Surface Water
If a CTD-Diver is used in surface water, it is important that
there is sufficient circulation around the CTD-
s sensors.
Sedimentation, algae and plant growth should be minimized
as much as possible to ensure the CTD-Diver measures the
surrounding water level.
Position the CTD-Divers deep enough so that they remain
below a possible ice layer.
A steel protective cover that can be locked should be used to
prevent vandalism or theft of the CTD-Diver.
CTD-Divers can also be used to indirectly measure discharge.
In such a case, the CTD-Diver can be installed in a monitoring
tube/screen next to a weir.
Summary of Contents for CTD-Diver DI28 Series
Page 1: ...CTD Diver DI28x Series...
