Elster TRZ2 - HF Pulse Generator Installation; Pressure Test Point Details

Elster-Instromet
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– Assign the terminalsonthepluginaccordancewiththepinassignmentontheunit.
– Use a screened cable to the external device.
Pulse generators for subsequent installation are also available (only if bore holes have been
provided in the housing).
HF pulse generators (Type A1S) can, however, be tted only by the Customer Service.
Bycontrast,youcanconnecttheplugyourself,asdescribedabove.
Warning! All pulse generators are intrinsically safe and may only be connected to intrinsically
safe circuitswhenusedinpotentially explosive atmospheres. The safety barriers must com-
plywiththerequirementsofignitionprotectionEEx ib IIC(seealsomarkinginAnnexA).
Thedevicemustnotbeinstalledonexternalsourcesofhighorlowtemperatureswhosetem-
peraturewouldresultinahigherorlowerambienttemperatureforthedevicethanthepermitted
ambient temperature range.
8. Pressure Test Point
Astraightmale coupling in accordancewith DIN 2353 ispre-ttedon the meterhousingfor
measuring the reference pressure.
The pressure test pointismarkedP
m
/P
r
and is designed for connection of d = 6 mm steel tubes
inaccordancewithDINEN10305-1(e.g.steelgradeE235)orexibleElsterpressuretubes.
Important: do not connect the straight male coupling to pipes made of stainless steel or pipes
made of nonferrous materials.
Note:werecommendthatyouuseoriginalParker-Ermetopipeunions.
Functional safety and reliability are ensured only if the material combination of the union compo-
nent and the pipe are intermatched.
WerecommendthatyoucontactourCustomer Serviceforconversionworkandwheninstalling
additional devices.