ANNEXES
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Manual EC 24 · EN05 · 2015-02
43
To achieve the highest possible accuracy, the following inlet pipe is to be installed upstream of the
meter:
TERZ 94: length of 2 DN, with one perforated-plate straightener
TRZ 03-TE: length of 2 DN (specified by Technical Guideline G 13)
TRZ 03-TEL: no inlet pipe required.
Downstream of the meter a straight pipe or a bend in the diameter of the meter and with a total
length of at least 2 DN has to be built in as outlet pipe.
In the case of the TERZ 94, you can install the meters in any position (vertical or horizontal) up to
and including the nominal diameter of DN 200. From the nominal diameter of DN 250 and in the
case of the TRZ 03-TE / TEL, only the position stated in the purchase order is possible.
When you install the meter, please observe the direction of flow indicated on the case!
The meter head (1) can be turned after the clamping screw (2) has been loosened. Turn the meter
head by max. 360°, otherwise the signal wires can become twisted and break.
Start-up
Connecting the gas flow
Do not fill any downstream pipelines or station sections through the
TERZ 94 or TRZ 03 – TE / TEL turbine meters. This may speed up the turbine wheel and
lead to excessively high flow rates with resultant damage.
Short-time overload operation of 20% above the maximum flow rate Qmax is permissible. No
damage will occur in the case of a return flow without shocks.
Initializing the device
Set all totalizers to the meter reading of your choice. (See programming.)
Now check the settings of the pulse width, decade scalers, etc.
In the case of models with a current output:
Also check the settings of the current output.
NOTE:
All parameters can only be changed if the device has been opened.
