RHEONIK RHE28, Installation & Start?Up Manual

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RHE28 Installation & Startup Guide – Doc. No. 8.2.1.07 – Ver. 1.31 5 / 43
2 Quick Start
A complete flowmeter system typically consists of a:

RHMxxx Sensor

RHExx Transmitter

Interconnection cable
Carry out the following steps to prepare the flow meter for operation:
1) If not already done, install the RHM sensor in line (refer to the RHM Coriolis Sensor
installation and startup guide for additional information on mechanical installation).
Connect the interconnecting cable to the RHE using the terminating scheme that matches
the RHM electrical connection type (see section 3.2.1 for electrical termination schemes).
2) Connect all signal input, output and communications interface wiring as required (section
3.2.3).
3) Connect power supply (section 3.2.2).
NOTE:
For safety, always connect the protective ground.
For installations in hazardous areas, a protective ground must always be connected.
4) Switch on the power supply. The display backlight will light up and after a power up
sequence, the display will show the flow measurement screen. In case of an error the
backlight will turn red.
5) Flush the RHM flow sensor with process fluid and ensure that it is free of air bubbles (in
case of a liquid process fluid) or liquid droplets (in case of a gaseous process fluid).
6) Wait until the RHM temperature has stabilized and then carry out a zero point calibration
(section 4.3):

Ensure a zero flow condition is present in the flow sensor by closing isolation valves

Initiate zeroing of the sensor and wait for the zeroing procedure to complete

Open isolation valves to allow flow through the sensor
3 Installation
3.1 Mechanical Installation
The RHE28 is a wall mount transmitter for installation in harsh environment. The standard
enclosure rating is IP65 / NEMA 4, IP67 / NEMA 4X is available optionally.
Technical data and dimensioned drawings of the RHE28 transmitter can be found in Appendix B.
3.2 Electrical Installation
Caution, the surface of the connection box may be hot if a hot fluid is running through
the RHM sensor.
Unused cable entries at the RHE28 have to be closed by suitable sealing plugs.
Electrical connections to the transmitter are made onto multi-conductor plug headers which are
located under the cover at the bottom of the housing. The connectors are color coded for ease
of identification: