Measuring Instruments Directive (MID) Applications Supplement
MMI-20029195, Rev AA
April 2015
Micro Motion® Compact Density Meters (CDM)
Measuring Instruments Directive (MID) Applications Supplement
Safety messages
Safety messages are provided throughout this manual to protect personnel and equipment. Read each safety message carefully
before proceeding to the next step.
Emerson Flow customer service
Email:
• Worldwide: flow.support@emerson.com
• Asia-Pacific: APflow.support@emerson.com
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Contents
Contents
Chapter 1 MID applications .............................................................................................................. 1
Chapter 2 Certification .....................................................................................................................2
Chapter 3 MID flow computer and power supply requirements ........................................................3
Chapter 4 Flow computer density calculations .................................................................................4
Chapter 5 TPS and external input connections to the flow computer ................................................ 6
Chapter 6 MID support .....................................................................................................................7
Chapter 7 Read revision and checksum data .....................................................................................8
Chapter 8 Secure the meter ..............................................................................................................9
Chapter 9 Switch to unsecured mode ............................................................................................. 12
Measuring Instruments Directive (MID) Applications Supplement i
Contents
ii Micro Motion® Compact Density Meters (CDM)
1 MID applications
The Measuring Instruments Directive (MID) is a European Union directive (2004/22/EC)
that standardizes 10 types of measuring instruments. For example, MID standardizes the
instruments used for the continuous and dynamic measurement of liquid quantities other
than clean water (Annex MI-005).
TPS connections
The CDM meter provides the raw density information in a time period value over the Time
Period Signal (TPS) output. The TPS output is the “MID”-approved output.
MID applications
Measuring Instruments Directive (MID) Applications Supplement 1
Certification
2 Certification
An assessor uses the voluntary Welmec 8.8 guide to test the essential parts of an MID
liquid measuring system. If the tests pass, the assessor issues an evaluation certificate or
parts certificate.
The CDM has been tested by NMi Certin BV based on Welmec 8.8. OIML R117 was used as
the normative document. The evaluation certificate number is TC8272.
MID labelFigure 2-1:
A. Certificate number
As a result of this test and certification, the CDM can be used in an MID liquid
measurement system.
2 Micro Motion® Compact Density Meters (CDM)
MID flow computer and power supply requirements
3 MID flow computer and power supply
requirements
Approved flow computers
When using the CDM in an MID application, the CDM must use an approved flow
computer, such as a FloBoss S600 (TC7379, TC7470, TC8218), or an OMNI 3000/6000
(TC7375).
An approved flow computer is a flow computer which has either:
• An EC-type examination certificate for annex MI-005
• An evaluation certificate or parts certificate issued by a notified body under the
Welmec 8.8 guideline
Power supply requirements
When not powered by a flow computer, the CDM must be powered by one of the following
power-supply types:
• DC/DC Phoenix QUINT PS/24VCD/24VDC/5
• AC/DC Phoenix QUINT PS/1AC/24VDC/3.5
Measuring Instruments Directive (MID) Applications Supplement 3
Flow computer density calculations
4 Flow computer density calculations
If you want to calculate temperature-corrected and pressure-corrected densities, you will
need external temperature and external pressure inputs.
You must use MID-approved pressure and temperature transmitters for the external
temperature and pressure inputs. For example, Rosemount pressure transmitter type
3051S (TC7457) and Rosemount temperature transmitter type 3144P (TC7458) are both
MID-approved.
In addition, you will need to program the following equations into the flow computer to
calculate:
• Density (ρ)
• Temperature-corrected density (ρt)
• Temperature-corrected and pressure-corrected density (ρtρ)
For 7835/45 and legacy density meters
Use the following formula when:
• Replacing a 7835/45 density and concentration meter with a CDM
• Using legacy density calculations
Formula for 7835/45 and legacy density metersFigure 4-1:
4 Micro Motion® Compact Density Meters (CDM)
Flow computer density calculations
For new CDM applications
Use the following formula when using a new application with a CDM.
Formula for new CDM applicationsFigure 4-2:
Measuring Instruments Directive (MID) Applications Supplement 5
TPS and external input connections to the flow computer
5 TPS and external input connections
to the flow computer
The following diagram shows the TPS, external temperature, and external pressure inputs
to the flow computer.
6 Micro Motion® Compact Density Meters (CDM)
6 MID support
When the meter is secured, process data meets MID requirements for custody transfer
applications.
The meter is always either secured or unsecured.
The meter leaves the factory in unsecured mode, with Status Alert A027: Security Breach
active. Process data cannot be used for custody transfer until the meter is secured. The
alert will clear when the meter is secured.
When the meter is unsecured, all features and functions are available. When the meter is
secured, configuration and calibration functions are not available, but basic operator
functions are available. See the following table.
MID security and functionsTable 6-1:
Function Meter is unsecured Meter is secured
Meter configuration ✓
Meter calibration ✓
Sensor zero ✓
Sensor simulation ✓
mA output trim ✓
Connecting to the device from ProLink III ✓ ✓
Connecting to the device from the Field Communicator
Reading process data, configuration data, calibration, and diagnostic data
Viewing and acknowledging alarms ✓ ✓
MID support
✓ ✓
✓ ✓
Measuring Instruments Directive (MID) Applications Supplement 7
Read revision and checksum data
7 Read revision and checksum data
Display OFF-LINE MAINT > SW REV
ProLink III Device Tools > Diagnostics > Core Processor Diagnostics > Core Processor Firmware Checksum
Device Tools > Device Information > (Transmitter Electronics) Software Revision
Device Tools > Device Information > (MID) Software Revision
Field Communicator To read the transmitter firmware checksum: Overview > Device Information > MID Information >
Xmtr Firmware
To read the MID software revision: Overview > Device Information > MID Information > MID Soft-
ware Version
To read the transmitter software revision: Overview > Device Information > Revisions > Trans-
mitter Software
Overview
During commissioning, you may need to read the transmitter firmware checksum, the
transmitter software revision, and the Weights & Measures MID software revision.
8 Micro Motion® Compact Density Meters (CDM)
8 Secure the meter
A
When the meter is secure, process data meets MID requirements for custody transfer
applications.
Prerequisites
If necessary for your installation, arrange for a site visit by a certified Weights & Measures
inspector, and ensure that the inspector is present for the appropriate portions of this
procedure.
Ensure that the transmitter is ready to be secured, i.e., it is configured as desired and you
have performed all appropriate tests and adjustments. After the transmitter is secured,
you cannot make any changes to configuration, many maintenance actions are disallowed,
and some operator actions are disallowed.
You will need a 3 mm strap wrench and a 3 mm hex key.
Procedure
Secure the meter
1. Power down the meter.
2. Remove the transmitter end-cap.
Transmitter with end-cap removedFigure 8-1:
A. Transmitter end-cap
3. Remove the safety spacer.
Measuring Instruments Directive (MID) Applications Supplement 9
A
B
Secure the meter
Transmitter with end-cap and safety spacer removedFigure 8-2:
A. Transmitter end-cap
B. Safety spacer
4. Move the custody transfer switch to the ON position (down).
The custody transfer switch is the switch on the right.
HART security switch and custody transfer switchFigure 8-3:
A. HART security switch
B. Custody transfer switch
10 Micro Motion® Compact Density Meters (CDM)
5. Re-install the safety spacer and end-cap.
6. Install the physical seal.
Important
The physical seal is a paper seal that must be installed by a certified Weights & Measures
inspector. The seal is provided by the inspector. Place the seal over the bolt between the
transmitter and sensor.
Custody transfer sealFigure 8-4:
Secure the meter
7. Power up the meter.
During power-up, the meter checks the position of the custody transfer switch, and
clears Status Alert A027: Security Breach Active.
Measuring Instruments Directive (MID) Applications Supplement 11
A
Switch to unsecured mode
9 Switch to unsecured mode
If the meter is secured, you must switch to unsecured mode to change the transmitter
configuration or perform many administrative tasks.
Prerequisites
Before switching to unsecured mode, ensure that you will be able to switch back to
secured mode. Because switching to unsecured mode requires breaking the physical seal,
switching back to secured mode may require a site visit from a certified Weights &
Measures inspector and reinstallation of the physical seal.
You will need a 3 mm strap wrench and a 3 mm hex key.
Procedure
1. Power down the meter.
2. Remove the paper seal on the clamp attaching the transmitter to the sensor.
3. Remove the transmitter end-cap.
Transmitter with end-cap removedFigure 9-1:
A. Transmitter end-cap
4. Remove the safety spacer.
12 Micro Motion® Compact Density Meters (CDM)
A
B
Switch to unsecured mode
Transmitter with end-cap and safety spacer removedFigure 9-2:
A. Transmitter end-cap
B. Safety spacer
5. Move the custody transfer switch to the OFF position (up).
The custody transfer switch is the switch on the right.
HART security switch and custody transfer switchFigure 9-3:
A. HART security switch
B. Custody transfer switch
Measuring Instruments Directive (MID) Applications Supplement 13
Switch to unsecured mode
6. Replace the safety spacer and end-cap.
7. Power up the meter.
During power-up, the meter checks the position of the custody transfer switch, and
posts Status Alert A027: Security Breach Active.
14 Micro Motion® Compact Density Meters (CDM)
Switch to unsecured mode
Measuring Instruments Directive (MID) Applications Supplement 15
Micro Motion Inc. USA
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www.micromotion.nl
*MMI-20029195*
MMI-20029195
Rev AA
2015
Micro Motion Asia
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Republic of Singapore
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