Micro Motion® H-Series Hygienic Coriolis
Flow and Density Sensors
January 2019
Safety and approval information
This Micro Motion product complies with all applicable European directives when properly installed in accordance with the
instructions in this manual. Refer to the EU declaration of conformity for directives that apply to this product. The EU declaration
of conformity, with all applicable European directives, and the complete ATEX Installation Drawings and Instructions are available
on the internet at www.emerson.com or through your local Micro Motion support center.
Information affixed to equipment that complies with the Pressure Equipment Directive, can be found on the internet at
www.emerson.com.
For hazardous installations in Europe, refer to standard EN 60079-14 if national standards do not apply.
Other information
Full product specifications can be found in the product data sheet. Troubleshooting information can be found in the configuration
manual. Product data sheets and manuals are available from the Micro Motion web site at www.emerson.com.
Return policy
Follow Micro Motion procedures when returning equipment. These procedures ensure legal compliance with government
transportation agencies and help provide a safe working environment for Micro Motion employees. Micro Motion will not accept
your returned equipment if you fail to follow Micro Motion procedures.
Return procedures and forms are available on our web support site at www.emerson.com, or by phoning the Micro Motion
Customer Service department.
Emerson Flow customer service
Email:
• Worldwide: flow.support@emerson.com
• Asia-Pacific: APflow.support@emerson.com
Telephone:
North and South America
United States800-522-6277U.K.0870 240 1978Australia800 158 727
1.2 Best practices................................................................................................................................... 6
1.3 Temperature limits...........................................................................................................................6
1.4 Recommendations for hygienic and self-draining applications......................................................... 7
5.1 Purge the sensor case .................................................................................................................... 21
Installation Manual3
ContentsInstallation Manual
January 201920002346
4Micro Motion H-Series
Installation ManualPlanning
20002346January 2019
1Planning
1.1Installation checklist
□ Make sure that the hazardous area specified on the approval tag is suitable for the
environment in which the meter will be installed.
□ Verify that the local ambient and process temperatures are within the limits of the
meter.
□ If your sensor has an integral transmitter, no wiring is required between the sensor and
transmitter. Follow the wiring instructions in the transmitter installation manual for
signal and power wiring.
□ If your transmitter has remote-mounted electronics, follow the instructions in this
manual for wiring between the sensor and the transmitter, and then follow the
instructions in the transmitter installation manual for power and signal wiring.
Table 1-1: Maximum cable lengths
Cable typeTo transmitterMaximum length
Micro Motion 4-wireAll 4-wire MVD transmitters— 1,000 ft (305 m) without
Ex-approval
— 500 ft (152 m) with IIC
rated sensors
— 1,000 ft (305 m) with IIB
rated sensors
Table 1-2: Maximum lengths for user-supplied 4-wire cable
Wire functionWire sizeMaximum length
Power (VDC)22 AWG (0.326 mm²)300 ft (91 m)
20 AWG (0.518 mm²)500NaN ft (NaN m)
18 AWG (0.823 mm²)1,000 ft (305 m)
Signal (RS-485)22 AWG (0.326 mm²) or larger 1,000 ft (305 m)
□ For optimal performance, install the sensor in the preferred orientation. The sensor will
work in any orientation as long as the flow tubes remain full of process fluid.
□ Install the meter so that the flow direction arrow on the sensor case matches the actual
forward flow of the process. (Flow direction is also software-selectable.)
1.2Best practices
The following information can help you get the most from your sensor.
• There are no pipe run requirements for Micro Motion sensors. Straight runs of pipe
upstream or downstream are unnecessary.
• If the sensor is installed in a vertical pipeline, liquids and slurries should flow upward
through the sensor. Gases should flow downward.
• Keep the sensor tubes full of process fluid.
• For halting flow through the sensor with a single valve, install the valve downstream
from the sensor.
• Minimize bending and torsional stress on the meter. Do not use the meter to align
misaligned piping.
• The sensor does not require external supports. The flanges will support the sensor in
any orientation.
1.3Temperature limits
Sensors can be used in the process and ambient temperature ranges shown in the
temperature limit graphs. For the purposes of selecting electronics options, temperature
limit graphs should be used only as a general guide. If your process conditions are close to
the gray area, consult with your Micro Motion representative.
Note
• In all cases, the electronics cannot be operated where the ambient temperature is
below -40 °F (-40.0 °C) or above 140 °F (60.0 °C). If a sensor is to be used where the
ambient temperature is outside of the range permissible for the electronics, the
electronics must be remotely located where the ambient temperature is within the
permissible range, as indicated by the shaded areas of the temperature limit graphs.
• Temperature limits may be further restricted by hazardous area approvals. Refer to the
hazardous area approvals documentation shipped with the sensor or available from the
Micro Motion H-Series Hygienic Coriolis Flow and Density Meters Product Data Sheet. For
further quesitons, contact customer service.
6Micro Motion H-Series
400
(204)
81
(27)
–148
(–100)
Tproc
140 (60)
158 (70)
–40 (–40)
A
B
Tamb
Installation Manual
20002346January 2019
Planning
• The extended-mount electronics option allows the sensor case to be insulated without
covering the transmitter, core processor, or junction box, but does not affect
temperature ratings. When insulating the sensor case at elevated process
temperatures (above 140 °F (60.0 °C)), please ensure electronics are not enclosed in
insulation as this may lead to electronics failure.
Ambient and process temperature limits for all H-Series meters
1.4Recommendations for hygienic and selfdraining applications
H-Series sensors are self-draining when installed in a vertical pipeline.
For optimal cleanability and drainability:
• If possible, install the sensor in a vertical pipeline with the process fluid flowing upward
through the sensor.
• If the sensor must be installed in a horizontal pipeline, drainage is accomplished by air
purge evacuation of the pipeline circuit.
• For clean-in-place (CIP) applications, Micro Motion recommends using the generally-
accepted flow velocity of at least 1.5 m/s for cleaning the sensor.
• The gap between the electronics housing and sensor body should be inspected
periodically. Manually clean this gap when necessary.
• Tri-clamp and DIN 11851 style process connections require special gaskets to comply
with EHEDG requirements for hygienic design.
Installation Manual7
A
B
C
PlanningInstallation Manual
January 201920002346
Figure 1-1: Installation for self-draining applications
A. Process pipeline
B. Direction of normal process flow
C. Direction of drainage
8Micro Motion H-Series
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