RHEONIK RHE28 Installation manual

RHE28 Installation & Startup Guide –Doc. No. 8.2.1.07 –Ver. 1.31
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RHE28
Installation & Startup Guide
Documen t No.: 8.2. 1.0 7
Version 1. 31 AP R-2021

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Table of Contents
1General Information ..........................................................................................................4
1.1 Important Safety Instructions for operating Coriolis Flowmeters ......................................4
1.2 Manufacturer’s Liability......................................................................................................4
1.3 Additional Resources ..........................................................................................................4
2Quick Start ........................................................................................................................5
3Installation........................................................................................................................5
3.1 Mechanical Installation ......................................................................................................5
3.2 Electrical Installation ..........................................................................................................5
Interconnecting RHE/RHM..................................................................................................6
3.2.1.1 RHM Electrical Connection Type JM & SM (11 Terminals) .................................................6
3.2.1.2 RHM Electrical Connection Type TM (PTFE Cable) .............................................................7
3.2.1.3 RHM Electrical Connection Type JO (12 Terminals)............................................................8
3.2.1.4 Legacy RHM Sensors (9 Terminals).....................................................................................9
Power Supply and Grounding ...........................................................................................11
3.2.2.1 Grounding .........................................................................................................................11
3.2.2.2 12V to 24V DC Power Supply ............................................................................................11
3.2.2.3 100V to 240V AC Power Supply ........................................................................................11
3.2.2.4 AC and DC Supply..............................................................................................................12
Control Inputs and Outputs ..............................................................................................12
3.2.3.1 Digital Outputs..................................................................................................................12
3.2.3.2 Analog Outputs.................................................................................................................13
3.2.3.3 Digital Inputs.....................................................................................................................14
3.2.3.4 Analog Input .....................................................................................................................15
4Operation and Configuration ........................................................................................... 16
4.1 Function of the Pushbuttons.............................................................................................16
4.2 Passcodes and Menu Selection.........................................................................................17
4.3 Zero Offset Calibration......................................................................................................18
4.4 Change of Positive Flow Direction ....................................................................................18
4.5 Temperature Measurement Configuration ......................................................................19
4.6 Output Configuration........................................................................................................20
Analog Output Configuration ...........................................................................................20
Digital Output Configuration ............................................................................................21
Digital Input Configuration ...............................................................................................24
5Remote Operation ........................................................................................................... 25
5.1 RS485 ................................................................................................................................25

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5.2 HART .................................................................................................................................25
6Service and Maintenance................................................................................................. 26
6.1 Maintenance and Calibration...........................................................................................26
6.2 Troubleshooting................................................................................................................26
6.3 Service...............................................................................................................................26
6.4 WEEE and RoHS ................................................................................................................26
7Ordering Code ................................................................................................................. 27
Appendix A Ex-Safety Instructions................................................................................... 28
A.1 Safety instructions for the installation in a hazardous area:............................................28
A.2 System Description: ..........................................................................................................29
A.3 Electrical Safety Limits ......................................................................................................29
A.4 Thermal Safety Limits .......................................................................................................30
A.5 Grounding and Shielding ..................................................................................................30
A.6 Installation........................................................................................................................31
A.7 Electrical connection of power supply and I/O .................................................................31
A.8 Electrical connection to RHE .............................................................................................32
A.9 Ordering Code...................................................................................................................33
A.10 Technical Data ..................................................................................................................34
A.11 Compliance .......................................................................................................................34
A.12 Service and repair .............................................................................................................35
A.13 Contact address ................................................................................................................35
Appendix B Technical Information .................................................................................. 36
B.1 Technical Data ..................................................................................................................36
B.2 Mechanical drawing .........................................................................................................38
Appendix C CE Certificates .............................................................................................. 39

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1General Information
1.1 Important Safety Instructions for operating Coriolis Flowmeters
For RHE28 units requiring 12 to 24V DC power, the use of a properly grounded (PELV)
supply is highly recommended.
The use of shielded cables for all I/O signals is recommended to prevent interference
from high level EMI.
Only the specifically designed shielded cable supplied by Rheonik should be used to
connect RHE Transmitters to RHM Flow Sensors. Do not use other types of cable.
For safety instructions regarding RHM Coriolis Flow Sensors, please refer to the RHM
installation and startup guide manual.
These measuring instruments are not designed for, and should not be installed in, life-
preserving systems used in the medical, motor vehicle, aircraft, water craft or mining
industries.
All national regulations and standards regarding electrical installation must be
observed!
1.2 Manufacturer’s Liability
Rheonik assumes no liability for loss and/or consequential damages stemming from the
use of this product utilized in life-preserving systems in the medical, motor vehicle,
aircraft, water craft or mining industries.
Rheonik accepts no liability for loss or damage resulting from the improper use of any
of its products.
Rheonik assumes no liability for the loss of production and/or consequential damage
from the use of this product unless such liability has been expressly and contractually
agreed.
Rheonik provides a standard one year from shipment warranty on all products for
workmanship and materials. Performance of this warranty will be at the Rheonik
manufacturing facility.
Rheonik assumes no liability for determining the suitability of its products in any specific
application. This is the sole responsibility of the end user.
1.3 Additional Resources
This guide is intended as a quick reference instruction to aid the
installation and startup of an RHE28 Coriolis mass flow transmitter
with an RHM flow sensor and is a supplement to the documentation
found in the RHE2X Desktop Reference. The RHE2X Desktop
Reference and further resources are available for download from the
Rheonik website:
www.rheonik.com

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2Quick 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
3Installation
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:

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Black: power supply
Blue: connection to RHM and 4-20mA pressure sensor (if present)
Green: I/O signals
The standard plugs are a push-in wire connection type. Solid wires and stranded wires with end
sleeves can be connected by simply pushing the wire into the opening. For connecting stranded
wires without prepared ends (crimp ferrules, etc.), it may be necessary to press down and hold
the cable release operator while inserting the wire. To disconnect a wire, simply press down the
cable release operator and withdraw the wire while it is held down. Other types of connector,
such as those with screw terminals may be available and can also be used. RHE28 units are
delivered with 2 x M16 cable glands and 2 x M25 blind covers as a standard.
Interconnecting RHE/RHM
Only interconnecting cable (ARHE-Cx cable) supplied by Rheonik should be used to connect an
RHE to an RHM. Cable not supplied by Rheonik may lead to a poor performance of the Coriolis
mass flow meter.
Table 1: Overview RHM electrical connection types
RHM electrical
connection type
Junction box / terminals
Section
JM, SM
aluminium, stainless steel / 11
3.2.1.1
TM
- / PTFE cable with 9 wires + shield
3.2.1.2
JO
aluminium / 12
3.2.1.3
legacy type
aluminium, stainless steel / 9
3.2.1.4
3.2.1.1 RHM Electrical Connection Type JM & SM (11 Terminals)
Table 2: RHE28 Wiring Plan for RHM Connection Types JM, SM
RHM Terminal
Cable
RHE28 Terminal
No.
Name
Wire
Color
Function
No.
Name
1
DRV H
Brown
Drive Coil high
1
DrvH
2
DRV L
Blue
Drive Coil low
2
DrvL
3
PT P
Red
Temperature Sensor Pipe
3
PtP
4
PT G
Pink
Temperature Sensors GND
4
PtG
5
PT T
Orange
Temperature Sensor Torsion
5
PtT
6
PUA H
Yellow
Pick Up Coil A high
6
PkAH
7
PUA L
Green
Pick Up Coil A low
7
PkAL
8
PUB L
Grey
Pick Up Coil B low
8
PkBL
9
PUB H
White
Pick Up Coil B high
9
PkBH
10 1
PE
(yel/grn)
Shield
10
PE
11 1
PE C
(yel/grn)
1The RHM has 2 terminals for the connection of the cable shield. One is connected directly to PE, the other via a
1nF capacitor (PE C).
The best protection against RF EMI is achieved if the cable shield is connected at both ends. In installations with a
long interconnecting cable between RHE and RHM, significant potential difference between the PE at the RHE and

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Figure 2: RHE28 Wiring
with RHM Connection
Type TM
the PE at the RHM may occur. Connecting the shield to PE at both ends might lead to undesirable current flow in
the shield. In situations where a high potential difference is present between the RHE and RHM, we recommend
grounding via the PE C terminal on the RHM side.
Figure 1: RHE28 Wiring with RHM Connection Types JM, SM & SC
Upon power up, if the RHE indicates an error and the temperature measurement on the bottom
right of the display shows “ -.--°C/°F ” please check the temperature measurement configuration
setting in the RHE (section 4.5).
The correct temperature measurement configuration setting for an RHM with connection type
JM or SM is “7”.
3.2.1.2 RHM Electrical Connection Type TM (PTFE Cable)
Table 3: RHE28 Wiring Plan for RHM Connection Type TM
1The shield of the cable is connected internally to the housing of the RHM. If there is a
risk of a significant potential difference between the housing of the RHM and the PE
terminal of the RHE, the shield should be connected to the RHE PE connection via a 1nF
capacitor. Alternatively, a separate cable can be run for potential equalization between
the RHM case and the RHE and the shield left both unconnected and isolated at the RHE
or terminated to the PE connection via a 1nF capacitor.
Cable
RHE28 Terminal
No.
Wire Color
Function
No.
Name
1
Brown
Drive Coil high
1
DrvH
2
Blue
Drive Coil low
2
DrvL
3
Red
Temp. Sensor Pipe
3
PtP
4
Pink
Temp. Sensors GND
4
PtG
5
Orange
Temp. Sensor Torsion
5
PtT
6
Yellow
Pick Up Coil A high
6
PkAH
7
Green
Pick Up Coil A low
7
PkAL
8
Grey
Pick Up Coil B low
8
PkBL
9
White
Pick Up Coil B high
9
PkBH
10 1
(yel/grn)
Shield
10
PE

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Upon power up, if the RHE indicates an error and the temperature measurement on the bottom
right of the display shows “ -.--°C/°F ” please check the temperature measurement configuration
setting in the RHE (section 4.5).
The correct temperature measurement configuration setting for an RHM with connection type
TM is “7”.
3.2.1.3 RHM Electrical Connection Type JO (12 Terminals)
Table 4: RHE28 Wiring Plan for RHM Connection Types JO
RHM Terminal
Cable
RHE28 Terminal
No.
Name
Wire Color
Function
No.
Name
1
DRIVE +
Brown
Drive Coil high
1
DrvH
2
DRIVE -
Blue
Drive Coil low
2
DrvL
3
PT1 Pipe Supply
Red
Temperature Sensor Pipe
3
PtP
4
PT1 Pipe Sense
Pink
Temperature Sensors GND
4
PtG
5
PT 1/2 Common
-
-
-
-
6
Pick-Up left+
Yellow
Pick Up Coil A high
6
PkAH
7
Pick-Up left -
Green
Pick Up Coil A low
7
PkAL
8
Pick-Up right-
Grey
Pick Up Coil B low
8
PkBL
9
Pick-Up right+
White
Pick Up Coil B high
9
PkBH
10 1
GND
(yel/grn)
Shield
10
PE
11
PT2 Tor. Supply
Orange
Temperature Sensor Torsion
5
PtT
12
PT2 Tor. Sense
-
-
-
-
1The shield of the cable is connected through terminal 10 to to the housing of the RHM. If there is a risk of a
significant potential difference between the housing of the RHM and the PE terminal of the RHE, the shield should
be connected to the RHE PE connection via a 1nF capacitor. Alternatively, a separate cable can be run for potential
equalization between the RHM case and the RHE and the shield left both unconnected and isolated at the RHE or
terminated to the PE connection via a 1nF capacitor.
Figure 3: RHE28 Wiring with RHM Connection Types J6 & JO

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Upon power up, if the RHE indicates an error and the temperature measurement on the bottom
right of the display shows “ -.--°C/°F ” please check the temperature measurement configuration
setting in the RHE (section 4.5).
The correct temperature measurement configuration setting for an RHM with connection type
JO is “3”.
3.2.1.4 Legacy RHM Sensors (9 Terminals)
Table 5: RHE28 Wiring Plan for RHM legacy version
RHM Terminal
Cable
RHE28 Terminal
No.
Wire Color
Function
No.
Name
1
Brown
Drive Coil high
1
DrvH
2
Blue
Drive Coil low
2
DrvL
3
Red
Temperature Sensor Pipe Supply
3
PtP
4
Pink
Temperature Sensor Pipe Sense
4
PtG
5
Orange
Temperature Sensors Common
5
PtT
6
Yellow
Pick Up Coil A high
6
PkAH
7
Green
Pick Up Coil A low
7
PkAL
8
Grey
Pick Up Coil B low
8
PkBL
9
White
Pick Up Coil B high
9
PkBH
Screw Term 1
(yel/grn)
Shield
10
PE
1The shield of the cable is connected to the housing of the RHM using a screw terminal in the junction box. If there
is a risk of a significant potential difference between the housing of the RHM and the PE terminal of the RHE, the
shield should be connected to the RHE PE connection via a 1nF capacitor. Alternatively, a separate cable can be run
for potential equalization between the RHM case and the RHE and the shield left both unconnected and isolated at
the RHE or terminated to the PE connection via a 1nF capacitor.
Figure 4: RHE28 Wiring with RHM legacy sensors

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Upon power up, if the RHE indicates an error and the temperature measurement on the bottom
right of the display shows “ -.--°C/°F ” please check the temperature measurement configuration
setting in the RHE (section 4.5).
The correct temperature measurement configuration setting for an RHM legacy sensor is “1”.