RHEONIK RHE21 Installation manual

RHE21 Installation & Startup Guide –Doc. No. 8.2.1.04 –Ver. 1.31
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RHE21
Installation & Startup Guide
Documen t No.: 8.2. 1.0 4
Version 1. 31 APR-202 1

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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 ..........................................................................................................6
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, Grounding and I/O Connections Overview ...............................................11
3.2.2.1 Grounding .........................................................................................................................13
3.2.2.2 12V to 24V DC Power Supply ............................................................................................13
3.2.2.3 100V to 240V AC Power Supply ........................................................................................13
3.2.2.4 AC and DC Supply..............................................................................................................14
Control Inputs and Outputs ..............................................................................................14
3.2.3.1 Digital Outputs..................................................................................................................14
3.2.3.2 Analog Outputs.................................................................................................................16
3.2.3.3 Digital Inputs.....................................................................................................................18
3.2.3.4 Analog Input .....................................................................................................................19
4Operation and Configuration ........................................................................................... 20
4.1 Function of the Pushbuttons.............................................................................................20
4.2Passcodes and Menu Selection.........................................................................................21
4.3 Zero Offset Calibration......................................................................................................22
4.4 Change of Positive Flow Direction ....................................................................................22
4.5 Temperature Measurement Configuration ......................................................................23
4.6 Output Configuration........................................................................................................24
Analog Output Configuration ...........................................................................................24
Digital Output Configuration ............................................................................................25
Digital Input Configuration ...............................................................................................28
5Remote Operation ........................................................................................................... 29
5.1 RS485 ................................................................................................................................29

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5.2 HART .................................................................................................................................30
6Service and Maintenance................................................................................................. 31
6.1 Maintenance and Calibration...........................................................................................31
6.2Troubleshooting................................................................................................................31
6.3 Service...............................................................................................................................32
6.4 WEEE and RoHS ................................................................................................................32
7Ordering Code ................................................................................................................. 32
Appendix A Ex-Safety Instructions................................................................................... 33
A.1 Safety instructions for the installation in a hazardous area:............................................33
A.2 System Description: ..........................................................................................................34
A.3 Electrical Safety Limits ......................................................................................................34
A.4 Thermal Safety Limits .......................................................................................................36
A.5 Grounding and Shielding ..................................................................................................36
A.6 Installation........................................................................................................................36
A.7 Electrical connection of power supply and I/O .................................................................38
A.8 Electrical connection to RHM and pressure sensor ..........................................................38
A.9 Ordering Code...................................................................................................................40
A.10 Technical Data ..................................................................................................................41
A.11 Compliance .......................................................................................................................41
A.12 Service and repair .............................................................................................................42
A.13 Contact address ................................................................................................................42
Appendix B Technical Information .................................................................................. 43
B.1 Technical Data ..................................................................................................................43
B.2 Mechanical Drawings .......................................................................................................45
B.3 Mounting Drawing............................................................................................................51
Appendix C CE Certificates .............................................................................................. 52

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1General Information
1.1 Important Safety Instructions for operating Coriolis Flowmeters
For RHE21 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 RHE21 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 RHE21 transmitter are designed for wall or pipe bracket mounting in harsh environment. The
enclosure is rated IP66 / type 4X. The RHE21-EP can also be installed behind a panel.
The RHE21 should be mounted with 4 screws M6 or #12 (e.g. UNC12-24) on a metal mounting
plate with minimum thickness of 6mm (1/4”).
Note: The screw must enter the nut by at least 4 full turns!
Alternatively a pipe mounting is possible. A set of 2 pipe brackets is available as accessory.
The mechanical drawings of the different RHE21 as well as the mounting drawing for pipe bracket
mounting can be found in appendix B.

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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 RHE21 have to be closed by suitable sealing plugs.
Electrical connections to the transmitter are made either with screw terminals or push-in
connectors. To connect or disconnect a wire to a push-in connector push down the cable release
operator while inserting or drawing out the wire.
Interconnecting RHE/RHM
Except for the RHE21 construction types E5 and H3 all RHE21 are delivered with an integrated
cable for connection with an RHM sensor. They can be directly connected to the RHM sensor
according to Tables 2 to 5.
The RHE21 construction types E5 and H3 have to be connected to an RHM sensor according to
Tables 2 to 5 using the bottom RHE21 terminal box. 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
3.1.1.1
TM
- / PTFE cable with 9 wires + shield
3.1.1.2
JO
aluminium / 12
3.1.1.3
legacy type
aluminium, stainless steel / 9
3.1.1.4
3.2.1.1 RHM Electrical Connection Type JM & SM (11 Terminals)
Table 2: RHE21 Wiring Plan for RHM Connection Types JM, SM
RHM Terminal
Cable
RHE21 Terminal 1
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 2
PE
(yel/grn)
Shield
10
PE
11 2
PE C
(yel/grn)

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Figure 2: RHE21 Wiring
with RHM Connection
Type TM
1 Connection only necessary for RHE21 construction types E5 and H3 without integrated sensor cable.
2The 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
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: RHE21 Wiring with RHM Connection Types JM, SM
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: RHE21 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
Cable
RHE21 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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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.
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: RHE21 Wiring Plan for RHM Connection Types JO
RHM Terminal
Cable
RHE21 Terminal 1
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 2
GND
(yel/grn)
Shield
10
PE
11
PT2 Tor. Supply
Orange
Temperature Sensor Torsion
5
PtT
12
PT2 Tor. Sense
-
-
-
-
1 Connection only necessary for RHE21 construction types E5 and H3 without integrated sensor cable.
2The shield of the cable is connected through terminal 10 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.

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Figure 3: RHE21 Wiring with RHM Connection Types J6 & JO
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: RHE21 Wiring Plan for RHM legacy version
RHM Terminal
Cable
RHE21 Terminal 1
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 2
(yel/grn)
Shield
10
PE
1 Connection only necessary for RHE21 construction types E5 and H3 without integrated sensor cable.
2The 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.

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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”.
Figure 4: RHE21 Wiring with RHM legacy Sensors