KROHNE CORIMASS P Series User manual

Version November 1996
CORIMASS P and E Series
Software Version P2.20
Installation and
Operating
Instructions
MFM 2081 K and F
MFM 3081 K and F

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How to use these installation and operating instructions
For easy reference these Instructions are divided into four parts.
Only Part A (page 3) is needed for installation and initial start-up.
All CORIMASS mass flowmeters of the P- and E-Series are factory set to your order
specifications.
Part A Install flowmeter in the pipeline (Sect. 1), connect up (Sect. 2) and power the
flowmeter (Sect. 3).
The system is operational
Part B Operator control and functions of the MFC 081 Signal Converter.
Part C Service and functional checks.
Part D Technical data and dimensions.
Product liability and warranty
The CORIMASS mass flowmeter MFM 2081 and MFM 3081 is designed for the direct
measurement of mass flow rate, product density and product temperature, and also indirectly
enables measurement of parameters such as total mass, concentration of dissolved
substances and the volume flow.
For use in hazardous areas, special codes and regulations are applicable which are specified
in the special “Ex installation and operating instructions“ (supplied only with hazardous-duty
equipment).
Responsibility as to suitability and intended use of our instruments rests solely with the
purchaser.
Improper installation and operation of the flowmeters may lead to loss of warranty.
In addition, the “general conditions of sale“ forming the basis of the purchase agreement
are applicable.
If you need to return CORIMASS flowmeters to KROHNE, please complete the form on the
last page of this manual and return it with the meter to be repaired. Krohne regrets that it
cannot repair or check your flowmeter unless accompanied by this completed form.
CE / EMC Standards / Approvals
•The Corimass MFM 2081 and MFM 3081 with the MFC 081 signal converter meet the
requirements of the EU-EMC Directives and bear the CE symbol.
•The Corimass MFM 2081 and MFM 3081 K -Ex are approved as hazardous duty equipment
to the harmonised European Standards and to Factory Mutual (FM) (pending). Further
details are given in the “Ex” supplementary instructions provided only with hazardous-duty
equipment.
Technical data subject to change without notice

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Contents
Part A: Installation and Start-up 4 - 28
1. Instrument Description 5
1.1 The Corimass Measuring System 5
1.2 Mass Flow Sensor 6
1.2.1 Measuring Principle 6
1.2.2 Transducer MFS 2000 (P-Series) 6
1.2.3 MFS 3000 Transducer (E-Series) 7
2. Installation 8
2.1 General Principles 8
2.2 Installation Guidelines 9
2.2.1 Location of Corimass Transducer 9
2.2.2 Requirements of the piping system 12
2.2.3 Special remarks on the MFS 3000 15
3. Electrical Installation 17
3.1 Location and Connecting Cables 17
3.2 Connection to Power 17
3.3 Inputs and Outputs 18
4. Start-up 20
4.1 Factory Set Parameters 20
4.2 Initial Start-up 20
4.3 Installation Factor 21
4.4 Zero Point Adjustment 21
4.5 Programming the Converter with a Bar Magnet 22
4.6 Installation of the Converter MFC 081 F 22
4.7 Connection of Remote Mounted Version 23
4.8 Connection Diagram of Compact Version 28
Part B: MFC 081 Signal Converter - Software Version P2.20 29 - 76
5. Operation of the Signal Converter 29
5.1 Operating and Check Elements 29
5.2 Krohne Operating Concept 30
5.3 Key Functions 31
5.3.1 How to enter programming mode 32
5.3.2 How to terminate programming mode 32
5.4 Table of Programmable Functions 35
5.5 Reset / Quit Menu - Totalizer Reset and Status Indication Acknowledgement 45
5.6 Status Messages 47
5.7 Menu Variations for Systems with Other Output Options 48
6. Description of Functions 49
6.1 Zero Point Adjustment 49
6.2 Low Flow Cutoff 51
6.3 Time Constant 51
6.4 Programming the Display for Measurement Values 52
6.5 Programming Numeric Data 55
6.6 Setting the Current Output 56
6.7 Setting the Frequency / Pulse Output 59
6.8 Setting the Process Alarm Output 63
6.9 Setting the Control Input 65
6.10 Setting the System Control 66
6.11 Standby Function 67

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6.12 Density Calibration Adjustment 69
6.12.1 Water as the reference liquid 69
6.12.2 Process fluid as the reference liquid 69
6.13 Density - Special functions 71
6.13.1 Density - Special functions 71
6.13.2 Referred density (option) 72
6.13.3 Fixed density (option) 72
6.14 User Data 73
6.14.1 Programming the display language 73
6.14.2 Password protection of menus 73
6.14.3 Custody transfer protection code 74
6.14.4 Primary head type and tube parameters (CF 1 - 9) 76
6.14.5 Location 76
Part C: Special Options, Functional Checks, Service and Order Numbers 77 - 96
7. Special Options 77
7.1 Use in Hazardous Areas 77
7.2 Converter with Non-standard Output Options 77
7.3 Concentration Measurement and Special Density Options 77
7.4 Converter with Smart / HART Communication Option 77
7.5 Converter with RS 485 Communication Option 78
7.6 Custody Transfer Option 78
8. Functional Checks 78
8.1 Test Functions 78
8.1.1 Testing the display 78
8.1.2 Testing current output 79
8.1.3 Testing pulse output 79
8.1.4 Testing alarm output 81
8.1.5 Testing control input 81
8.1.6 Viewing temperature 82
8.1.7 Viewing primary head signal conditions 82
9. Service and Troubleshooting 83
9.1 Threads and “O” Ring of the Converter Housing Lid 83
9.2 Replacing the Converter Electronics 83
9.3 Change of Operating Voltage and Power Fuse F9 84
9.3.1 Replacement of power fuse F9 84
9.3.2 Changing the operating voltage 84
9.4 Turning the Display Circuit Board 85
9.5 Turning the Signal Converter Housing 85
9.6 Troubleshooting 86
9.7 Fault Finding 89
9.8 Checking the Primary Head 92
9.9 Status Warnings 93
10. Order Numbers 96
Part D: Technical Data and Dimensions 97 - 103
11. Technical Data 97
11.1 Primary Head 97
11.2 MFC 081 Signal Converter 99
11.3 Measuring Accuracy / Error limits 100
11.4 Dimensions and weights 101
11.4.1 Compact Systems - MFS 3081 K / MFS 2081 K 101
11.4.2 Remote Systems - MFS 3081 F / MFS 2081 F 102

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Part A Installation and Start up
1. Instrument Description
1.1 The CORIMASS Measuring System
The CORIMASS Measuring System uses the Coriolis principle for measuring the mass flow
rate of fluids with high accuracy.
When using this measuring principle, it is possible to measure the mass flow rate directly,
independent of any other parameters of the fluid, such as density, temperature, pressure,
viscosity, conductivity and flow profile. Homogeneously distributed small solid particles
(slurries) and gas bubbles have no noticeable effect on the measuring accuracy.
The CORIMASS mass flow rate system is of modular type design, comprising a transducer
and a converter. In the compact version MFM 2081 K / MFM 3081 K the converter is mounted
directly to the transducer; in the separate version MFM 2081 / MFM 3081 the transducer MFS
2000 / MFS 3000 and the converter MFC 081 F are connected to each other via a shielded
multi-conductor cable (figure 1). The MFM 2081 is also referred to as “P-Series,” and the
MFM 3081 is also referred to as “E-Series”. The measurement values of mass flow rate, total
mass and density are available.
Additional to the standard system for special requirements the following models are available:
−transducer with electric or liquid heating
−transducer with secondary containment or pressure relief
−hazardous duty model:
EEx ib II B or EEx ib II C (no electric heating!) are applied
−FM Class I, II, III, Div. 1 and Div. 2, Groups B-G (pending)
Compact Version Separate Version
MFM 2081 K MFM 2081 F
Transducer MFS 2000 plus Converter MFC 081 F
Shielded multi-conductor cable
Fig. 1 The CORIMASS Measuring System

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1.2 Mass Flow Sensor
1.2.1 Measuring Principle
Coriolis forces occur in rotating systems when accompanying bodies are moved toward or
away from the rotational axis. This is illustrated by the following simple set-up: a pipe tube
rotates with a constant angular velocity around the axis A - B (figure 2). The fluid particles
flow with the velocity v through the loop. Between the points C and D they move away from
the axis and therefore have to be accelerated from a smaller to a larger tangential velocity.
Respectively, the fluid particles have to decelerate reducing their tangential velocity between
points E and F. The opposing coriolis forces acting upon the two different parts of the pipe
loop are directly proportional to the product of the mass and the velocity of the fluid. They
cause the pipe loop to deform (DD’, EE’ and FF’ respectively) with respect to a rotating loop
filled with a flowing fluid.
Fig. 2 Coriolis force in a rotating pipe loop
Rotation does not necessarily mean the completion of full circular orbits. Short circular
segments suffice. In the event of oscillation, the deformation of the pipe loop sides oscillates,
too. The total change in the motion of the pipe loop caused by the mass flow can be detected
via inductive sensors. A signal directly related the mass flow rate of the fluid flowing through
the pipe loop is then generated after appropriate signal processing.
1.2.2 Transducer MFS 2000 (P-Series)
For greater sized mass flow meters it has proven to be of advantage for the fluid to flow
through two parallel measuring loops, which oscillate in opposite directions and with a phase
difference of 180°. This symmetrical arrangement of the loops and the stiffness of the bridge
(i.e. the pipe loop supports) suppress most disturbances caused by external equipment.
Figure 3 displays an optimised transducer of the MFS 2000 series designed for mass flow
measurement.
Fig. 3: Transducer MFS 2000 without housing

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The use of flow dividers with optimised flow properties combined with the application of
measuring tubes with a large tube cross-section ensures minimum loss of pressure. The
danger of cavitation in the specified measuring range is eliminated.
The use of thick-walled measuring tubes with a large cross-section exercises a further positive
effect. Due to the increase in the vibrating mass, the measuring system is less sensitive to
gas bubbles in the measured medium.
1.2.3 MFS 3000 Transducer (E-Series)
The CORIMASS MFS 3000 series is comprised of precision transducers for the measurement
of small fluid and gas mass flow rates with the range of 0.006 kg./min. to 33.3 kg./min. (0.013
lb./min. to 73.16 lb./min.).
In contrast to the CORIMASS P-series of instruments, the CORIMASS E-series is designed as
a single-tube system with the inherent advantages of a single flow path (see Fig. 4).
Fig. 4: MFS 3000 Transducer without housing
Due to its low-frequency tuned reference platform, the MFS 3000 is largely insensitive to
interference. The unit is characterised by a rugged transducer loop, which permits optional
measurements up to operating pressure levels of as much as 300 bar (4352 psig) depending
on model.
A further advantage of the E-series is its ease of maintenance and servicing.

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2. Installation
2.1 General Principles
The MFS 2000 and MFS 3000 CORIMASS mass flowmeters are capable of providing high
accuracy and excellent repeatability. The narrow band pass digital filtering, the dual parallel
tubes of the P-Series and the tuned reference platform of the E-Series provide exceptional
immunity to external vibratory disturbances from process equipment in the area. Furthermore,
the power of the CORIMASS with its dual driver design permits unsurpassed performance on
certain types of slurries and on liquids with gas bubbles. Both designs are self-draining when
installed vertically.*
As with all Coriolis mass flowmeters, the CORIMASS is an active device with its own energy
source. The MFS 2000 mass flow sensor should be mounted into and by a rigid supporting
piping system to avoid reflected resonant energy from adjacent piping and mounting structures
in order to take advantage of the high degree of precision built into the instrument (fig. 5). A
possible exception is mentioned in Section 2.2.2.
Fig. 5 Basic installation requirement
MFS 2000: rigid, stress free supporting of the transducer
The MFS 3000 transducer should be mounted by using two metallic clamps (supplied with the
flowmeter), which are secured to a rigid mounting surface, as shown. For optimum
performance these clamps should be positioned near the outboard ends of the transducer
support tubes. They should also be well aligned to prevent undue stress on the MFS 3000
transducer housing when the clamps are secured. Adjacent piping should be rigidly supported
and aligned with the transducer to avoid excess loading on the transducer process
connections(See Fig. 6). For connection to tubing, process tubing should also be secured at
appropriate locations (indicated by arrows in Fig. 6) to minimize vibration.
* Note: 1.5E requires aproximately 7°anti-clockwise rotation from vertical.

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Fig. 6: Installation MFS 3000
A good installation is the basis for the high measurement accuracy of the unit.
The following installation guidelines are practical to implement, particulary if planned before
the CORIMASS is first installed.
2.2 Installation Guidelines
2.2.1 Location of CORIMASS Transducer
Please ensure the following installation guidelines are adhered to as they are
absolutely
necessary
for good measurement results and trouble-free start-up.
The transducer can be installed in any position. However, when installed in a vertical position
the transducer is self-draining and allows gas bubbles to be readily purged from flowmeter
during flowing conditions (see Fig. 7a and 7b).

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Fig. 7a Vertical installation Fig. 7b Horizontal installation
Highest position in Pipeline
Avoid mounting the transducer in this position as gas bubbles may collect and remain in
measuring system causing incorrect measurements (see Fig. 8).
Fig. 8 Avoid highest position in pipeline

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Falling Pipeline
Long downstream pipelines (> 3m) should be avoided due to degassing of the medium.
If long downstream pipelines are unavoidable install an additional vent valve as shown in
Figure 9, unless there is under all operating conditions sufficient back pressure to avoid
flashing of liquid to vapor.
Fig. 9 Avoid long downstream pipelines after the transducer
Pumps
Pumps should be installed at least 4 ×L from the transducer.
Where pumps cause excessive vibration, de-coupling by flexible hose may be necessary.
Install as shown in Figure 10.
Fig. 10 Minimum distance from delivery pump 4 ×L

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Additional Devices
Control valves, inspection glasses, etc., should be installed at least 1 ×L from the transducer
flange.
De-coupled pairs of Transducers
Transducers of the same size (or operating frequencies within 3 Hz) should not be installed in
close proximity (< 4 L) in the same pipeline or connected via a mutual mounting frame unless
they have been specially frequency de-coupled by the manufacturer (see Fig. 11).
The first 5 digits of the RB (shown on the Data Plate and on the Calibration Certificate) give
the operating frequency of the transducer with water.
Fig. 11 Mounting of matched transducers serial or parallel
2.2.2 Requirements of the Piping System
Fixing
The mounting supports must be kept as short and as rigid as practical to prevent excitation of
resonant vibrations by the transducer (see Fig. 12). Additional cross bracing is necessary
when the maximum support length smis exceeded (see Fig. 13).
Fig. 12 Mounting with rigid supports

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As an example the table indicates maximum support length for U-shape profile and the various
transducer sizes.
Dimensions and maximum lengths smof U-shape supports. The chosen material dimensions
are examples for adjusting support dimensions to transducer size.
profile b mm (in) h mm (in) d mm (in) sm mm (in)
e.g. for
60 P
300 P
800 P
1500 P
60 (2.4)
80 (3.1)
120 (4.7)
160 (6.3)
30 (1.2)
45 (1.8)
55 (2.2)
65 (2.6)
6 (.24)
6 (.24)
7 (.28)
7.5 (.30)
1260 (49.6)
1490 (58.7)
1810 (71.3)
2090 (82.3)
Fig. 13 U-profile
The pipe clamp on the supports should have a large surface area contact with the support and
process pipe. No rubber, plastic or other material should be installed between the clamp and
process pipe. The transducer should be supported and clamped free of tension on either side
of the flanges as illustrated. The clamps should be equidistant and as close to the flanges as
possible.
Do not mount supports on flanges or on the housing.
Process pipes on either side of the transducer should be axially aligned, and flanges should be
parallel face to face within 0.4 mm (.016 in). the installation dimension (L) across the
transducer flanges must be matched to the process pipe flanges within ±2 mm (.079 in).
For long pipe runs additional pipe supports must be installed 1 to 2 transducer lengths (L)
apart (fig. 14).
Fig. 14 Distance of additional supports

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Reduction in Process Pipe
Use standard reducing connectors on process pipes when they are larger than transducer
connection (fig. 15).
Fixing instructions mentioned previously must be followed.
Fig. 15 Use of reducing connectors
Flexible Hoses
Generally flexible hoses should be avoided. In applications where vibration is excessive,
flexible hoses can be used to de-couple the process from the transducer.
Some applications demand the use of flexible hoses and therefore the installation should
comply with the diagram (fig. 16).
If in any doubt about the use of flexible hoses contact KROHNE prior to installation.
Fig. 16 Use of flexible hoses
Transport supports
Transport supports fitted to larger meters are
not to be used for fixing the transducer in the
pipeline (fig. 17).
Fig. 17: Do not use transport supports for mounting

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Requirement for Zero Adjustment
A shut-off valve should be installed downstream of the transducer.
Tight shut-off is important (fig. 18).
Fig. 18 Shut-off valve downstream of the transducer
For best zero adjustment the meter can be installed in a by-pass arrangement as shown in the
diagram (fig. 19).
All peripheral devices can be active under operating conditions and the process flow must not
be shut off.
Fig. 19 By-pass installation for best Zero Adjustment
2.2.3 Special remarks on the MFS 3000
In order to guarantee the perfect function of the CORIMASS transducer MFS 3000 (even after
poor transport conditions), the transducer is provided with a “Transport Safety Device”. The
“Transport Safety Device” must be inactive for operation and active for transportation as
follows:
Commissioning:
Before commissioning, the “Transport Safety Device” must be made
inactive
by turning the
recessed Allen Screw (on reverse side of the instrument) anti-clockwise against the
mechanical stop with a 6 mm Allen Key. In the case of the MFS 3000 - 30E two “Transport
Safety Devices” are used, and both must be made inactive prior to commissioning
(see Fig. 20).

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Transport:
Before packing the unit for transport the “Transport Safety Device(s)” must be made
active
by
turning clockwise against the mechanical stop (see Fig. 20).
Note: Models MFS 3000 - 0.3 E, 1.5 E, and 10 E are depicted above. Model MFS 3000 - 30 E
has two transport locks (not shown) on the same side of the instrument as the single transport
lock shown.
Fig. 20 Location “Transport Safety Device”
Flexible pipes or hoses can easily be connected at the permanently installed transducer.
When installing in a horizontal position, the transducer can also be turned 90° and mounted
flat, as shown in Figure 21.
Fig. 21: Mounting variations for horizontal installation

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Caution:
If the MFS 3000 transducers are operated in the flow direction contrary to that indicated
by the arrow on the rating plate, the transducer constant GK may change by 0.15%
3. Electrical installation
3.1 Location and connecting cables
Location
Do not expose the compact flow meter to direct sunlight. Install a sunshade if necessary.
Connecting cables
To conform to protection category requirements, observe the following recommendations:
–Fit blanking plug PG 16 or 1/2” NPT and apply sealant to unused cable entries.
–Do not kink cables directly at cable entries.
–Provide water drip point (U bend in cable).
–Do not connect rigid conduit to cable entries. Use flexible conduit when required. Make
sure conduit drains away from connection to converter and transducer.
–If cables are a tight fit, enlarge inside diameter of cable gland by removing the appropriate
ring(s) from the seal.
3.2 Connection to power
–Note information given on the instrument dataplate (voltage, frequency)!
–Electrical connection in conformity with IEC 364 or equivalent national standard.
–Special regulations apply to installation in hazardous areas. Please refer to separate "Ex"
installation instructions.
–The PE protective ground conductor must be connected to the separate U-clamp
terminal in the terminal box of the signal converter.
–Do not cross or loop the cables in the terminal box of the signal converter. Use separate
(PG or NPT) cable glands for power and output cables.
–Ensure that the screw thread of the round cover on the terminal box is well greased at
all times.
NOTE: The grease used must be non-corrosive to aluminium; typically it must be resin-
and acid-free.
–Protect sealing ring from damage.
–See Figure 22 for the arrangement of power connections.
Please ensure that the information about power given on the
dataplate corresponds to the locally available mains voltage.

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5 6 4 4.1 4.2 11 12
}
Output
Connections
see Section 3.3 PE
N L AC
- + DC
}
Figure 22: Power and signal connections for MFC 081 K / F
3.3 Inputs and outputs
The table below shows the input/output connection for the converter. The exact configuration
depends on which optional output modules were fitted in the factory. The output options listed
include presently available and planned options. See Figure 22 for the arrangement of
converter connections. Option 1 is normally supplied unless one of the other options is
specifically ordered.
Table of input/output connections
No. Option 1
(Current, pulse, alarm
and input )
Option 2*
(2 current,NGI) Option 3** (2 current,GI)
5 Common (-) Common (-) Current output 1 (-)
6 Current output (+) Current output 1 (+) Current output 1 (+)
4 Control input Control input. Current output2 (-)
4.1 Pulse output Current output 2 (+) Current output 2 (+)
4.2 Alarm output (active) Alarm output (passive) not used
* The inputs/outputs share a common signal ground which is galvanically isolated from
ground (PE).
** Both current outputs are galvanically isolated from ground and each other.
For the standard converter, the pulse output is passive and requires an external voltage source
for operation. In addition, the signal may need protection from external electrical interference.
The use of screened cables and a filter capacitor next to any counter is recommended. (Fig.
23)
It is possible to connect the pulse output without using an external voltage supply. However to
do this the function of the alarm output must be sacrificed. (Fig. 24).
If the alarm output is used to power the pulse signal, then the following settings must be made
in the menus.
(i) Fct. 3.5.1 ALARM FUNCTION must be set to OFF
(ii) Fct. 3.5.2 ALARM ACTIVE LEVEL must be set to ACTIVE LOW.

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4.2
4.1
4
6
5
Rext
Pulse Output
Common
Screened Cable
OV
88888888
+
_COUNTER
Cext
(10 - 100nF if required)
Vext
(
Max. 24 V DC
)
Rext > Vext
0.15
Fig. 23: Connection with external voltage source
4.2
4.1
4
6
5
Rext (> 800 ohm)
Pulse Output
Common
Screened Cable
OV
88888888
+
_
COUNTER
Cext
(10 - 100nF if required)
Fig. 24: Connection using converter internal voltage source
Additional input/output options
No. Option 4
(2 current,
pulse and
input)
Option 5
(3 current
and
pulse)
Option 6
(3 current
and
input)
Option 7
(3 current
and
alarm
Option B*
(Current
and
RS485)
Option C**
(1 Current,
1 Dual
phase pulse
output and
input)
5 Common
(-) Common (-) Common (-) Common (-) Common (-) Common (-)
6 Current
output (+) Current output 1 (+) Current output 1 (+) Current output 1 (+) Current output 1 (+) Current output 1 (+)
4 Current
output 2 (+) Current output 2 (+) Current output 2 (+) Current output 2 (+) TX/RX Control Input
4.1 Control
Input Current output 3
(+)
Current
output 3
(+)
Current
output 3
(+)
TX/RX Pulse
Output A
4.2 Pulse
Output Pulse output Control Input Alarm output
(passive)
+5V Pulse
Output B
* Refer to separate RS 485 manual
** Refer to separate manual for this output option.

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4. Start-up
4.1 Factory Set Parameters
The mass flowmeter leaves the factory ready to be used. All process data has been
programmed according to the customer order. See factory programming sheet delivered with
the flowmeter.
When no process details were supplied at the time of order, the mass flowmeter is
programmed to a standard default set of values and functions.
The current and pulse outputs treat all flows as positive. The actual flow and quantity is
thereby measured independent of the flow direction. The indicator will indicate a “ – “ or “ + “
in front of the flow rate.
These factory-set settings for current and pulse may cause an error under the following
conditions: When the pump is stopped and a reverse flow is present, which is larger than the
low flow cut-off or when totalizing should be indicated for both flow directions.
To avoid these possible problems:
a) Set flow mode (Fct. 3.1.8) to either flow > 0 or Flow < 0, so that back flows are ignored.
or
b) Increase Low Flow cut-off (Fct. 3.1.7) so that small back flows are ignored.
or
c) Set the alarm output (Fct. 3.5.1) to DIRECTION so that external equipment can
differentiate between positive and negative flows.
4.2 Initial Start-up
•Please check that the power supply corresponds to the information supplied on the data
plate.
•Switch on the power supply.
•On switch-on, the signal converter first carries out a self-test. The following sequence is
displayed:
TEST
10 E PX.XX
Primary Head Software Version
STARTUP
Mass flow will be displayed following a brief settling phase for the primary head.
•For stable and accurate mass flow results the following should be checked:
a) The quality of the mechanical installation. See Sect. 2.
b) A good zero point calibration should be done. See Sect. 4.4. Further information
regarding zero point calibration can be found in Sect. 5.
A minimum warm-up time of 30 minutes is recommended to ensure
stable measurement operation.