DTU2xx Data Logger Series
User Guide. r. 2.1 | 2021-11-10
Tel.: +420 538 890 720
11
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2.
Type of input for connecting the engine hours meter.
Engine hours meter - the type of input used when connecting to the data logger devices that
require prophylaxis in terms of operating time, for example, pumps, filters, compressors to
maintain pressure in the system. The engine hours meter allows you to keep track of the time
worked by the device to control the remaining resource.
3.
Types of inputs for connecting sensors
Sensors of various types can be connected to the
inputs IO1 – IO4
of the data logger: resistance,
current loop 4-20mA, 1-Wire, etc. The following types of inputs are available for selection:
Signal
- the two-state input used when connecting resistive sensors to the DTU that measure
the resistance for signal transmission (temperature sensors, leakage, magnetic influence, etc.).
The open and closed resistance thresholds for this type of input are manually adjustable.
Leakage sensor
- the type of input used when connecting the ADGT leakage sensor to the
data logger.
Connection. The sensor has a two-wire connection scheme: one wire is connected to any of
the
IO1-IO4 (“-”)
contacts, and the other to the
3.6V (“+”)
contact. Connection polarity is not
important. The plate is placed where the leak is most likely to occur.
Temperature sensor (DMT-12)
- the type of input used when connecting the ADGT DMT-12
temperature and magnetic sensor to the DTU. The sensor is designed to measure the
temperature of the pipe surface and determine the effect of a magnetic field on meters.
Connection. Magnetic sensors are mounted on both sides of the water meter for high
accuracy in determining the impact, and the temperature sensor is installed on the pipe. The
sensor is connected to the data logger in a two-wire scheme: one wire is connected to any
of the
IO1-IO4 (“-”)
contacts, and the second to the
3.6V (“+”)
contact. One DMT-12 sensor
is provided for one water meter.
Temperature sensor (DT-14), or DS18B20 sensor
- the type of input used when connecting
an ADGT DT-14 temperature sensor with a 1-Wire interface to the data logger. DT-14 is a
waterproof temperature sensor of increased accuracy for measuring temperature at objects.
It is a piece of a three-wire loop connected to a temperature-sensitive DS18B20 element.
Fig. 6. Scheme of connecting ADGT sensors to data logger.
