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3
CTD-Diver Installation and Maintenance
Introduction
In practice the CTD-Diver is suspended in a monitoring well and the Baro-Diver is installed at the
surface for recording barometric pressure. Atmospheric pressure data must be used to compensate
the pressure measurements recorded by the CTD-Diver for variations in atmospheric pressure. In
principle, a single Baro-Diver is sufficient for an area with a radius of 15 kilometers depending on
terrain conditions. Also see
Appendix I Use of CTD-Divers at Varying Elevations
. A 10-meter change in
elevation is the equivalent of a barometric pressure change of approx. 1 cmH2O or 1 mbar.
The following sections describe how to install the CTD-Diver and Baro-Diver.
Configuring and Reading the CTD-Diver
A CTD-Diver must be programmed with the desired sample method, sample interval, and monitoring
point name before it is deployed. The CTD-Diver can be programmed, started, stopped and its data
read using the Diver-Office software. The latest version of Diver-Office can be downloaded for free
from
. Once the software is installed, a CTD-Diver can be connected to the
computer through a USB Reading Unit (part no AS330), a Smart Interface Cable (part no. AS346) or the
Diver-Gate(M) (part no. AS345).
3.2.1
Configuring a CTD-Diver
Open the Diver-Office software and click the Diver button to open the Diver window. See the image
below for an example where the following settings were entered:
•
-3
•
Fixed Fixed-
,
•
record interval: 1 hour,
•
conductivity range: 120 mS/cm,
•
conductivity type: specific conductivity.
After entering the settings, the Diver must be programmed by clicking the Program button.
The conductivity range can be set to 30, 120 or 300 mS/cm. Select the range corresponding to the
expected measurement values. A higher range reduces the resolution of the measurements. When the
actual measurement value exceeds the conductivity range, then stored value is clipped to the
maximum value.
Set the conductivity type to the desired type. See section
for more details.
Summary of Contents for CTD-Diver DI28 Series
Page 1: ...CTD Diver DI28x Series...
