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U408_flowthermNT_B_e_160420
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www.hoentzsch.com
7
Replacement Parts
- upper housing with keypad
- lower housing
- battery compartment cover
- seal for upper housing
- connector socket cap
- USB connection cover
- 12-pin connector plug
8
Instruction Manual Category 3G flowtherm NT
8.1
Equipment
Handheld flowtherm NT for connection of vane wheel flow sensors FA as probe and measuring tube, vortex
flow sensors VA40 or VADi, thermal flow sensors TA10 or TADi, as well as temperature probes Pt100.
Use in compliance with regulations
The flowtherm NT with above-mentioned category 3G sensors is designed for measuring the flow velocity,
the volume flow and the temperature of gases, and also of liquids with specified vane wheel flow sensors
FA and Pt100 for application in areas in which category 3G equipment is required.
During normal operation within the limits of the technical specifications the equipment does not generate
sparks and there is no intrinsic heating.
The flowtherm NT with respective sensors may not be used
in areas in which category 1G or 2G equipment is required
in areas in which category 1D, 2D or 3D equipment is required
8.2
Safety Instructions
Read the Instruction Manual carefully before initial operation! Failure to do so may cause an explosion!
The flowtherm NT with Ex sensors for category 3G and 3D is to be used only in areas in which the ambient
temperature range of the housing does not exceed 0 to +50 °C. See also details on the type plate of the
flowtherm NT or sensor as well as the relevant technical documents.
The maximum permissible
temperature of the medium
in categorie 3G areas corresponds to the
temperature class. See also details on the type plate as well as the relevant technical documents.
The container for the measuring gas is to be insulated in such a way as to guarantee that the device hous-
ing does not reach a higher temperature than the afore-mentioned maximum ambient temperature; also
taking radiant and convective heat into consideration.
Category 3G equipment listed under Section 8.1 is to be used solely in areas in which the temperature of
the measured gas, the ambient temperature and the maximum permissible pressure overload stated on
the type plate is not exceeded.
Sensors for use in pressurized pipelines are to be inserted or retracted in depressurized conditions only.
Non-oberservance may result in serious injuries to personnel.
Switch off the supply voltage before disconnecting the cable socket.
