Elster Instromet EK205, Руководство по эксплуатации

Страница: 27 / 71

Installation , connection and commissioning 27
5.2.1 Connecting gas meters
To measure the gas volume, a gas meter with a low-frequency pulse transducer can be
connected to the digital input DE1 of the EK205.
Ill.: 8
The pulse transducer of the gas meter is
connected to the DE1 (
1 ) terminal of the EK205.
Details and characteristics on the use of the
pulse transducer are described in the following
subchapters.
The line diameter for connection of the inputs of the EK205 is
0.8 … 1.0 mm (AWG 20 – 18).
5.2.1.1 Connection to a low-frequency pulse transducer
1. Connect the pulse output of the gas meter to the DE1 terminal ( 1 in Ill.: 8, page 27) of the
EK205.
The priority can be freely selected. (The and - of the terminals are intended for
connecting other pulse transducers.)
2. Set the operation parameters such as the cp value (pulse constant) as described in
chapter 5.3.1.2.
5.2.2 Lead-sealing of the input terminals
After connecting to the gas meter in accordance with chapter 5.2.1, the input terminal DE1
needs to be sealed.
To this end, the accessory bag terminal covers are provided. Where required, screw them via
the connected terminals and then glue an adhesive seal to the fastening screw (see chapter
5.3.2).
5.2.3 Connect temperature sensor
When connecting the temperature sensor, national requirements must be
observed.
Lubricate the temperature sensor before connecting with heat transfer paste to
increase its functionality.
1