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6
The temperature coefficient used in the CTD-Diver is 1.91 %/°C and the reference temperature is 25°C.
The setting to measure conductivity or specific conductivity can be programmed into the CTD-Diver
by the user.
CTD-Diver Model
The Diver models described in this manual are from the DI28x Series: the CTD-Diver. The CTD-Diver
measures absolute pressure, temperature and conductivity.
CTD-Diver
This Diver is manufactured using a zirconia (ZrO
2
) casing with a 22 mm
diameter. The CTD-Diver can store a maximum of 144,000
measurements (date/time, pressure, temperature and conductivity) in
its working memory and 144,000 measurements in its backup memory.
The CTD-Diver samples pressure, temperature and conductivity and has
the following measurement options:
•
Fixed length intervals in fixed length or continuous memory.
•
Average values.
•
Pre-programmed or user-defined pump tests.
•
Event-based. The CTD-Diver only stores measurements once
the user-adjustable variation limit set for the conductivity
measurement is exceeded.
The CTD-Diver is available in the following pressure ranges: 10 m, 50 m,
100 m and 200 m.
Factory Calibration Procedure
Each CTD-Diver is calibrated for pressure, temperature and conductivity:
1.
First the CTD-Diver is individually calibrated and tested at several temperature and pressure
values to ensure superior performance. The CTD-Diver is calibrated for the lifetime of the
instrument, as long as it is used within its specified range.
2.
Then the conductivity sensor is individually calibrated and tested at several conductivity
values. The factory calibration is stored permanently in the CTD-Diver.
A calibration certificate is available upon request.
Summary of Contents for CTD-Diver DI28 Series
Page 1: ...CTD Diver DI28x Series...
