KROHNE VFM5090 User Manual

4/2001

)

Vortex flowmeter

Installation and operating Instructions

FM 5090 (I

Part A System installation and Start-up

1. Description 1

2. Installation in the pipeline 1

2.1 General

2.2 Sandwich type to DIN 19205 / ANSI

2.3 Flanged type to DIN 2501 / ANSI B16.5 (SCH-40)

2.4 Temperature and Pressure measurements

2.4.1 Temperature measurement 4

2.4.2 Pressure measurement with built-in sensor 5

2.4.3 Pressure measurement by external means 5

3. Electrical connection 5

3.1 Installation location and cable diameter

3.2 Connection to power

3.3 Outputs

3.3.1 Abbreviations 6

3.3.2 Current (analog) output I 6

3.3.3 Frequency (pulse) output F 6

3.3.4 Connection diagram for outputs j to m 7-8

4. Start-up 8

Contents

1-3

Part B Signal converter VFC 090

5. Operation of the signal converter 9

5.1 General

5.1.1 Starting up signal converter 9

5.1.2 Measurement mode 9

5.1.3 Programming or menu mode 9

5.1.4 Error handling 9

5.2 Operating elements

5.3 Program organization and programming chart

5.3.1 Menu levels 11

5.3.2 Programming chart 12

5.3.3 Description of keys 13

5.4 Programming and function of keys

5.5 Error Messages

5.5.1 Error Messages in Measurement mode 16

5.5.2 Error Messages in Programming mode 17

5.5.3 Other Error Messages 17

5.6 Plausibility Checks

5.7 Options available with VFM 5090(I)

5.7.1 METER TYPE 18-19

5.7.2 OUTPUT TYPE 20-24

14-15

(I)

6. Description of program functions 25

6.1 Numerical order description

6.1.1 Program function description 25-39

6.1.2 Program function description for AGA supported software 39

6.2 Functional order description

6.2.1 Physical units 40-41

6.2.2 Numerical format 42

6.2.3 Display 42

6.2.4 Flow range and meter size 43

6.2.5 Primary information 43

6.2.6 Application information 43

6.2.7 Internal Electronic Totalizer 43

6.2.8 Current (analog) output I 44

6.2.9 Frequency (pulse) output F 45-46

6.2.10 Languages of display text 46

6.2.11 Coding desired for entry into programming mode 46

6.2.12 Behaviour of outputs during programming 46

Part C Functional checks and Trouble shooting hints

7. Functional checks 47

7.1 Primary head functional checks

7.1.1 Vortex Sensor 47

7.1.2 Temperature Sensor 47

7.2 Signal converter functional checks

7.2.1 Self diagnostics 47

7.2.2 Display check 48

7.2.3 Current output check 48

7.2.4 Frequency output check 48

8. Trouble shooting hints 48-49

Part D VFM 5000

9. Description of the system 50

9.1 VFM 5090(I)Ex Earthing connections

9.2 Electrical connection

10. Process pressure and temperature 50

11. Replacement of the electronics in signal converter 50-51

12. Nameplates of VFM 5090(I)Ex 52

Part E TECHNICAL DATA

53-76

Part A System installation and Start-u

1. Description

KHRONE MARSHALL Vortex Flowmete operate on the Karman vortex street principle to measure volumetric flow rate of gases / stea and liquids. VFM computes normalize volumetric and mass flow rates from operating

DF Max. allowable difference between inside

diameters of primary head and pipeline.

SIZE f Df SIZE f Df

(mm)

(inch)

10S 8.9

Pressure and Temperature values, or from densit values. Temperature sensor is standard & pressure sensor is optional to provide an on-line P&T compensation.

Items included with shipment

Compact Vortex Flowmeter

Installation and operating instructions

Mounting bolts, washers, nuts

Plastic cover wrench for electronic housing

· Optional upstream & downstream pipes

10 12.6

15 14.9

20 20.9

25 28.5

40 43.1

· Programming chart indicating factory configuration settings.

Gaskets between primary head and pipeline.

Provided by customer

· All cables for electrical connections.

50 54.5

80 82.5

100 107.1

150 159.3

200 206.5

2. Installation in the pipeline

2.1 General

Ensure that the bore of locating pipes are smooth and without deposits or scaling of welding beads.

3. Straight, unimpeded inlet and outlet runs

(inch)

0.4

(0.35)

(0.50)

(0.59)

(0.82)

(1.12)

(1.70)

(2.15)

(3.25)

(4.22)

(6.27)

(8.13)1 (0.039)

(0.016)

0.4

(0.016)

0.4

(0.016)

0.4

(0.016)

0.4

(0.016)

0.4

(0.016)

0.6

(0.024)

0.6

(0.024)

0.6

(0.024)

0.8

(0.031)

(inch)

3/8"S 8.9

(inch)

3/8" 12.6

1/2" 14.9

3/4" 20.9

1" 26.7

1/5" 40.9

2" 52.6

3" 78

4" 102.4

6" 154.2

(6.07)

8" 202.7

(inch)

0.4

(0.35)

(0.50)

(0.59)

(0.82)

(1.05)

(1.61)

(2.07)

(3.07)

(4.03)

(7.98)1(0.039)

(0.016)

0.4

(0.016)

0.4

(0.016)

0.4

(0.016)

0.4

(0.016)

0.4

(0.016)

0.6

(0.024)

0.6

(0.024)

0.6

(0.024)

0.8

(0.031)

Flow direction and meter position

Flow must always be in the direction of arrow, bluff side of vortex-shedding body facing incoming flow i.e. upstream side.

Vertical pipe run : upward flow direction

Horizontal pipe run : see below

Difference between inside diameter of primary head and pipeline

D=Meter size (Nominal Dia. DN)

INLET OUTLET

DN F Meter size of primary head in mm or inches.

Inside diameter of primary head in mm or inches.

With flow straightener the inlet pipe length may be halved e.g. for a control valve the inlet length is 25D instead of 50D. The minimum inlet pipe length including flow straightner must always be 12 D.

4. Pipe vibration

Pipe Vibration caused, for example, by the action of pumps, valves, etc., will falsify measurements particularly at low flow velocities. Support the pipeline on both sides of the flowmeter, in the direction perpendicular to both the pipeline & bluff body axis.

INLET OUTLET

· Pipe vibration limit is 0.2g _peak to peak upto 8-500 Hz crossover frequency..(which equals

0.75 mm)

5. Pipeline along a wall

Where possible, the distance between the pipe centerline and wall should be greater than 0.5 m(20”). If it is less, first connect all cables to terminals in the connection compartment (power supply and outputs) and run them via an intermediate connection box (see also Section 3) before installing the flowmeter.

6. Orientation

Turn the display board through ±90° or 180° to

obtain horizontal positioning of the display.

Turn the signal converter housing through ±90° should that be more suitable for the location of the installation.

7. State of Medium

Ensure single phase flow. Liquid droplets in gas/ vapour, solid particles in gas/liquid & gas bubbles in liquid are not permitted.

In Liquid application e.g. water, to prevent

cavitation, minimum D/S pressure is given by the

relation:

Pds(bar _g) > =(2.9*DP) + (1.3*Ps)-1.013

where

DP= pr. drop of VFM in Bar from sizing program

Ps=Sat.pr. in Bar at op.temp.

In case of steam or compressed gas, a moisture separator may be used 50D upstream of the meter if the dryness fraction is less than 95%.

For any fluid, a filter or strainer may be used to remove solid particles. This is specially important for meter sizes below 1” where a filter or strainer is a must.

Sandwich Version

Flanged Version

2.2 Sandwich type to DIN19205 / ANSI

Meter sizes DN 25, 40, 50, 80,100 and 150 (1”to

6”)

Pipe flanges (Pressure ratings to DIN DN50/PN40, 64, 100; DN80/PN40, 64, 100; DN100/PN16, 40, 64 and DN 150 / PN16, 40 to ANSI

Gaskets inside diameter must be greater than the inside diameter f of the primary head. e.g. use flat gaskets to DIN 2690. Gaskets must not project into the effective pipe cross sectional area.

Bolts, nuts and washers are supplied.

Check flange connections for leak-tightness after flowmeter installation.

Installation in Vertical Pipe Run

Assembly Diagram of Sandwich Units

:- DN25/PN40, 100; DN40/PN40, 100;

: 1” to 6”/ # 150, 300 SORF)

2.3 Flanged type to DIN 2501/ANSI B 16.5(SCH40)

Meter sizes DN 10S, 10, 15, 20, 25, 40, 50, 80 100,

150 and 200 (3/8”S to 8”)

· Pipe flanges

to DIN DN 50/PN 40, 64, 100; DN 80/PN 40, 64, 100; DN 100/PN 16, 40, 64; DN 150/PN 16, 40; DN 200/PN 10, 16 and to ANSI

Gaskets are supplied by us with flanged units.

Center the flowmeter by sight. ·

: DN 25/PN 40, 100; DN 40/PN 40, 100;

: 1/2” to 8” / # 150, 300 SORF)

· Check flange connections for leak-tightness after

flowmeter installation.

2.4 Temperature and pressure measurements

2.4.1 Temperature measurement

VFM 5090(I) is always supplied with a temperature sensor. This sensor is RTD (PT1000 type) and is located within the Vortex bluff body. See figure given for location of Temperature sensor. This sensor provides an accurate measurement of temperature of the medium at the vortex sensor.

Flowmeter will continuously measure medium temperature -

To display medium temperature ·

To provide on-line T compensation for mass and normalized flow computations.

To monitor whether the medium temperature remains within the user specified operating temperature limits.

Installation in Horizontal Pipe Run

2.4.2 Pressure measurement with built-in sensor

VFM 5090(I) may be supplied with an optional pressure sensor. This sensor is typically a strain gauge type and located in the primary assembly as shown in the figure below. Thus the sensor also provides an accurate measurement of pressure of the process fluid.

Flowmeter will continuously measure medium pressure -

To display the medium pressure value

To provide an on-line P&T compensation along with T sensor for mass and normalized volumetric flow computation.

To monitor whether the medium pressure is within the user specified operating pressure limits.

2.4.3 Pressure measurement by external means

To determine the pressure of the medium (e.g. to feed the pressure value in VFM for an off-line P&T compensation for mass or normalized flow computations), suitable measuring point must be provided near the flowmeter.

Location upstream of flowmeter

Min. distance : 20*DN (DN = meter size)

Location downstream of flowmeter

Min. distance : 5*DN (DN = meter size)

Allowance must be made for the pressure drop in the flowmeter as correction value for operating conditions prevailing upstream of the flowmeter.

3. Electrical connection

3.1 Installation location and cable diameter

Location

The rotating design of the housing makes it easier to connect the two cables for power and outputs to the terminals in the rear terminal box.

Cable diameter

To conform to protection category requirements, observe the following recommendations

Cable diameter : 8 to 13 mm (0.31” to 0.51”)

Enlarge the inside diameter of the Screwed conduit entry by removing the appropriate onion ring(s) from the seal,only if cables have extremely tight fit.

Fit blanking plug PG 16 and apply sealant to unused cable entries.

Do not kink cables at conduit entries.

Provide water drip point (U bend in cable).

Conduit Installation, general wiring considerations

When electrical codes require conduit, it must be installed in such a manner that the meter connection compartment remains dry at all times.

Power and output wiring should be run in a separate conduit.

Use twisted pair for output wiring.

WARNING Power wiring should utilize a grounded conductor to avoid possible shock hazard and damage to component parts.

3.2 Connection to power

Note information given on the instrument name

plate (voltage, frequency)!

Electrical connection in conformity with VDE 0100 “Regulations governing heavy-current installations with rated voltages up to 1000V” or equivalent national standard.

The PE protective ground conductor for supply power must be connected to the separate U-clamp terminal in the terminal box of the signal converter.

Do not cross or loop cables in the terminal box of the signal converter. Use separate PG or NPT screwed conduit entries for power and output cables.

Ensure that the screw thread of the round cover on the terminal box is well greased at all times.

Connection to power, VFM 5090(I)

Do not expose the compact flowmeter to direct

sunlight. Install a sunshade if necessary.

Do not expose to intense vibration. If necessary support the pipeline to the left & right of the flow meter.

3.3 Outputs

3.3.1 Abbreviations

Abbreviation Stands for

EC EMC F F

100%

I I

100%

Electronic counter Electro-mechanical counter Frequency (Pulse) output Pulses for Q = 100 % flow rate or pulse value Current (analog) output Current at 0/4 mA flow Current at 20 mA flow 0% flow rate Full - Scale range, 100 % flow rate.

Programming

via Fct. No...

---

1.4.X

1.4.2

1.3.X

1.3.3

1.3.4

1.1.2

Description

See Sect....

---

6.1 + 6.2.9

6.1 + 6.2.8

6.1 + 6.2.4

3.3.2 Current (analog) output I

The current output is galvanically isolated from all input and output circuits but not from frequency

output F. Therefore only one grounded receiver instrument may be connected to either current output I or frequency output F.

All functions and operating data are programmable, see sections 5, 6.1 & 6.2.8.

Factory-set data and functions are listed in the enclosed ‘Configuration Sheet’ on settings.

This can also be used to record any changes made to the operating parameters.

Max load at terminals 5/6 for I

(Fct. 1.3.4) :

100%

Max. load Kohms =

[

%100

(e.g. 0.7 K ohms for I

]

][

Error annunciation programmable to 2 mA or 22 mA (Fct. 1.3.2) ·

· Connection diagram  Refer to Section 3.3.4

= 20 mA)

100%

3.3.3 Frequency (pulse) output F

The frequency output is galvanically isolated from all input and output circuits but not from current output I.

Therefore only one grounded receiver instrument may be connected to either frequency output F or current output I.

All functions and operating data are programmable, see Section 5, 6.1 & 6.2.9.

Factory - set data and functions are listed in the enclosed report on settings. This can also be used to record any changes made to the operating parameters.

Active frequency output for electromechanical totalizers EMC (terminals 4.1/4.2) or for electronic totalizers EC (terminals 4.1/4.2 or 4/4.1/4.2), 10 to 36000000 pulses/hr (0.0028 to 10000 Hz), amplitude max. 30 V, selectable pulse widths and load rating see below.

Passive frequency output, open collector for connection of active electronic counters EC or switchgear, input voltage 5 to 30V, load current max. 100 mA, R

Pulse width (Fct. 1.4.3) as a factor of frequency f (pulse rate) and maximum permissible load for active output

= 100 ohms, selectable pulse widths see below.

(term. 4.1/4.2 or 4/4.1/4.2), see also Sect. 6.2.9.

Pulse width Frequency f = F

500 ms 0.0028 Hz < f

Load rating of active output

100%

Load current Load

1 Hz < 150 mA ³160 Ohm

200 ms 0.0028 Hz < f

2 Hz < 150 mA ³160 Ohm

100 ms 0.0028 Hz < f

3 Hz < 150 mA ³160 Ohm

100 ms 3 Hz < f

5 Hz < 60 mA ³400 Ohm

50 ms 0.0028 Hz < f

5 Hz < 150 mA ³160 Ohm

50 ms 5 Hz < f

10 Hz < 60 mA ³400 Ohm

30 ms 0.0028 Hz < f

6 Hz < 150 mA ³160 Ohm

30 ms 6 Hz < f

10 Hz < 80 mA ³300 Ohm

Pulse duty cycle 1:1* 10 Hz < f £ 1000 Hz < 25 mA ³1000 Ohm

160 µs* 1000 Hz < f £ 2547 Hz < 25 mA ³1000 Ohm

50 µs* 2547 Hz < f £ 10000 Hz < 25 mA ³1000 Ohm

* fixed pulse width, independent of programming in Fct. 1.4.3

Refer connection diagrams k, l and m. Refer to Section 3.3.4 ·

3.3.4 Connection diagram for outputs j to m

Output characteristics

Current output I:

Diagrams I1 in Section 6.2.8

3. Frequency output F: Diagram F1 in Section 6.2.9 R1 & R2 when electronic counter is connected to terminals 4/4.1/4.2 connection diagram l R1 = 1 Kohm , 1W R2 needed only for totalizer with input voltage Umax < 30 Volts.

Umax 24 V 12 V 5 V

R2 3.9 Kohm 680 ohm 180 ohm

4. Start-up

Check that the system has been correctly installed as described in Sect. 1, 2 and 3. ·

Before initial start-up check that the following details on the nameplate agree with the data specified in the

report of settings for the signal converter. If not, reprogramming will be necessary.

Meter size Fct. 3.1.1 Sect. 6.1, 6.2.5.

K-Factor Fct. 3.1.2 Sect. 6.1, 6.2.5.

The flowmeter is ready for service 15 minutes (waiting time) after switching on the power source. Increase

flow velocity slowly and steadily.

Avoid abrupt changes in pressure in the pipeline.

If the process product is steam, condensate may form initially and cause faulty measurements when the system

is started up for the first time.

When powered, the signal converter normally operates in the measurement mode. The power-on sequence to

measurement mode is as follows :

‘TEST’ is displayed for approx. 3 seconds followed by

‘VFM 5090’ the instrument type followed by

‘Ver x.xx’ the software version of the instrument.

Then instrument operates in measurement mode where it displays the parameter being measured or ‘FATAL ERROR ’ if there are one or more critical errors detected (For description on errors refer Sect 5.5)

Part B Signal Converter VFC 090

5. Operation of the signal converter

5.1 General

5.1.1 Starting up signal converter

When power is switched ON to signal convertor it displays TEST, VFM 5090 & Ver x.xx and then goes to measurement mode. In this initial sequence VFM 5090(I) carries out self diagnostics to check its own functional elements and loads the configuration data from non-volatile memory. If any error(s) are detected in power-ON diagnostics, the converter displays FATAL.ERROR since instrument has critical error(s) and is not able to carry out normal measurements. If no start-up errors are detected the first measured parameter displayed is the one being displayed when power supply was removed last time.

5.1.2 Measurement Mode

In measurement mode, the parameters that the converter measures/computes are shown on the display in the appropriate units. (See Sect. 5.2 for display details). As per the configuration, display can be either in noncyclic/cyclic mode. In non cyclic mode of display, use é key to see the next parameter on display. In cyclic mode display shows all the parameters one after another, wherein each parameter is displayed for about 6 seconds.

5.1.3 Programming or menu mode

All the configurations/settings/test functions are grouped in the form of menu tree structure (see Sect. 5.3.1 for details) and are accessible in the programming mode. Operator can view or alter the present settings and data values by the use of functions available in this mode.

All changes made in the programming mode are stored temporarily until the operator quits to the

measurement mode and responds YES to an ‘UPDATE’ prompt. Only then the new changes are saved in non-volatile memory and have appropriate effect on the operation of signal converter.

· Even in the programming mode the converter “keeps working” as per present configuration. Simply stated,

the converter continues to measure (flow rate, totalizing of flow, P, T etc.) and control outputs (current and frequency outputs) while in the programming mode.

5.1.4 Error handling

Converter can detect errors during power-on diagnostics as well as when in normal measurement mode. Errors are divided into two main categories viz. fatal errors and non-fatal errors. Fatal errors cause measurement to stop since they are serious in nature. Non-fatal errors do not affect functionality of the converter.

If one or more errors are present, display (in the measurement mode) starts blinking. If programmed so, error information is shown on display, interleaved between the display of two parameters.

5.2 Operating elements

CAUTION To avoid damage to electronics, be

certain that the area around the meter is dry before removing the electronics compartment cover.

The operating elements are accessible after removing the cover of the electronics section using the special wrench.

CAUTION Do not damage screw thread, never allow dirt to accumulate, and make sure it is well greased at all times.

  

Display, 1 Display, 2 Display, 3

line

Cursor symbols described below

Volumetric flow rate

Mass flow rate

Totalizer value

Measured / Set temperature value

Measured / Set pressure value

Velocity of medium



Keys for programming the Signal Converter, refer to Sect. 5.4 for the functions of keys.



Magnetic Sensors to program the converter by means of a hand-held bar magnet without having to open the housing, refer to Sect. 6.3. Function of sensors is same as keys . Hold the bar magnet by the cap. Apply other end of the magnet (north pole) to the glass pane above the magnetic sensors. Sensor or key response is acknowledged by symbols appearing in 1

xxx on the display is used to describe the type of

the meter. It can be :

line of display.

1. AGA - Natural Gas Meter (AGA)

2. FAD - Free Air Delivery

3. HM - Heat Meter

4. NHM - Net Heat Meter

5. STD - Standard

5.3 Program organization & programming chart

5.3.1 Menu Levels

The program for the signal converter consists of 5 levels. The 1st line of display will identify the menu level during programming.

* Function 4.0 is not accessible in usual manner and is explicitly generated due to errors detected by

5.3.2 Programming chart

MEASURED

PARA MET ER

Error Msg DISPLAY

NEXT MEASURED

PAR AMET ER

Next Error Msg

n Err

settings

not

Saved

YES

UPDATE NO?

Fct 3.2.2 as N

ENTRY.CODE.1

CODE 1(9 keys)

Password

Fct 3.2.2 as YES

ENTRY.CODE.1

Settings changed?

YES

settings saved

Plausibility

YES

checks OK?

Fct 1.0

OPERATION

Fct 2.0

TEST

Fct 3.0

INSTALL.

During plausibility corrections

Fct 1.1.0

BASIS PARAM

Fct 1.2.0

Fct 1.3.0

CURR. OUTP. I

Fct 1.4.0

FREQ. OUTP. F

Fct 3.1.0

BASIS. PARAM

E E

Fct 3.2.0

USER DATA

Fct 3.3.0

OPR. LIMITS

Fct 3.5.0

APPLICAT.

Fct 3.6.0

OPTIONS

Fct 3.7.0

P-DATA

Fct 3.8.0

HEAT PARA.

Fct 3.9.0

FAD. PARA

Fct 1.1.1 TO

E E

Fct 1.1. 4

Fct 1.2.1 TO

Fct 1.2. 7

Fct 1.3.1 TO

Fct 1.3. 7

Fct 1.4.1 TO

Fct 1.4. 6

Fct 2.1 TO

Fct 2.3

Fct 3.1.1 TO

Fct 3.1. 2

Fct 3.2.1 TO

Fct 3.2. 6

Fct 3.3.1 TO

Fct 3.3. 4

Fct 3.5.1 TO

Fct 3.5.11

Fct 3.6.1 TO

Fct 3.6. 4

Fct 3.7.1 TO

Fct 3.7. 6

Fct 3.8.1 TO

Fct 3. 8.15

Fct 3.9.1 TO

Fct 3.9. 8

Actual 1.1.X

FUNCTIONS

Actual 1.2.X

FUNCTIONS

Actual 1.3.X

FUNCTIONS

Actual 1.4.X

FUNCTIONS

ctual 2.X

FUNCTIONS

Actual 3.1.X

FUNCTIONS

Actual 3.2.X

FUNCTIONS

Actual 3.3.X

FUNCTIONS

Actual 3.5.X

FUNCTIONS

Actual 3.6.X

FUNCTIONS

Actual 3.7.X

FUNCTIONS

Actual 3.8.X

FUNCTIONS

Actual 3.9.X

FUNCTIONS

Fct 4.0

PARAM.ERROR

Fct 4.1 TO

Fct 4.10

ctual 4.X

FUNCTIONS

5.3.3 Description of keys

Measuring mode level

display measured parameters /error messages Enter programming

mode

é è

Main menu level

Go to main menu Enter main menu displayed Return to measuring mode level

Submenu level

Go to submenu

Enter submenu displayed Return to main

menu level

Function level

Go to Function Units/Options

Enter/execute function displayed. Then continue as under y data level

Data level

Go to next propo

Return to submenu

level or main menu level

Important

1. All changes made in programming mode are stored temporarily and do not affect operation of the signal converter until operator leaves menu mode and responds with UPDATE YES. Exceptions: all 2.X test functions.

2. Main menu level 4.0 PARAM.ERROR is automatically created if the plausibility checks on the new configuration detects invalid values entered. (See section 5.6 for details)

3. VFM 5090(I) continues to function even when in programming mode.

Temporarily sav

roposal then with further data any, or return function level

5.4 Programming and function of keys

Function of keys in measurement mode :

After power - on, the signal converter enters the normal measuring mode. Display shows the actual measured value of the parameter, units and arrow markers to identify parameter. A steady (non - blinking) display indicates that there are no errors in measuring mode. Use the é key to get the next parameter on display. If display is in cyclic mode (Fct. 1.2.7 CYCLE DISP as YES) the next parameter is displayed after every 6 seconds and é has no function.

Use the è key to go to the programming mode. If Fct. 3.2.2 ENTRY.CODE.1 is YES then converter will ask for the code 1 password. Password is the sequence of 9 keys as given under Fct. 3.2.3 CODE 1. A wrong password generates a set of unfamiliar characters on display. Press E key to go back to normal display.

Using the E key results in prompt for Code 2 password when converter is in measuring mode. Code 2 password is predefined and reserved for KHRONE MARSHALL service person. Operator should not use E key at normal display. If used by accident then give any arbitrary key sequence to Code 2 prompt until display gets back to normal.

Using keys in measuring mode

KEY FUNCTION

è è Followed by 9 keys

E followed by é è Resets LINE INTR error.

Function of keys in programming mode :

Programming and other functions are grouped in a menu tree structure. To navigate in the menu tree use keys as follows :

To go into the branch i.e. from main menu level to submenu level or submenu level to function level. If you were already at function level then that function will be executed.

Selects other options/branches at the same level. Takes you one level back. If you were already at main menu level then this key takes you back to

measurement mode.

Programming functions involve one or more of the following types of data.

1. Selecting an option from option list - initially present option is displayed in second line of display and

display blinks to indicate that there are other choices. Use the é key to scroll through all options one by one. Using E will cause that option to be selected and also completes selection process.

2. Entering a numeric value-Entering numeric data is very flexible in VFM 5090(I). You can enter +ve or -ve number in floating point with /without exponent notation.

Formats : ddd.ddddd floating point e.g.

1.2345678, -12.34567 dd. dddEdd exponent e.g.

1.00000E6, -1.2345E-3

Method of entry : Initially the present value is displayed (in floating point format as far as possible) in the

first line of display. A flashing digit will change by using é key. è selects next digit position in sequence and E terminates entry of the number.

With

}

without Display next parameter measured or next error message

coding, dependent on programming of

Fct. 3.2.2

Go to programming mode.

(Fct. 1.2.6 as YES for error messages) If in non cyclic mode ( Fct. 1.2.7 as NO) In cyclic mode the key has no function.

Notes

a) When you use è to move cursor and all digits start flashing then it means that you are at the decimal

point position. At this time use of é moves decimal point across the number.

b) Usually digits cycle through 0-9 values. At certain relevant position they cycle through 0, 1, 2, . . . 9,

-/E for -ve number or exponent notation.

c) When you enter a value beyond its limit then you get message dddd.dddd (MIN.VALUE) or

dddd.dddd (MAX.VALUE). Press E after you have noted limit and then correct value to be in valid limits.

d) If you don’t want to change value press E at the beginning itself!

Entering string (alphanumeric value) - This type of data input is required by a few functions. Present string is displayed in the 2

to scroll through characters 0 - 9, A - Z, a - z and some other punctuation characters.

Change flashing (cursor) position Terminate data entry.

line and as usual 1st column blinks. Use :

Note :

Since scroll list (using é key) is far too long, an autorepeat function to keys is enabled. This allows you to press and hold down é key to quickly reach the target character.

Using keys in programming mode

Key Main menu level Submenu level

Data level

Function level

Option/Units Numerical

values/strings

Go to main menu Go to submenu or function Select next proposal Change flashing

digit or character

Enter displayed main menu Enter displayed submenu or

(execute) function Quit Programming mode and go back to measurement

Return to main menu or

submenu mode

Shift flashing digit

or character position Select displayed proposal and return to function level if no further data entry is required by the function

Enter the displayed

numerical value or

alphanumerical

string. Then returns

to function level if

no further data input

is required by that

function.

VFM 5090(I) continues to perform measurement functions even when you are in the programming mode as per the configuration stored in non-volatile memory. Newly entered data will be saved in non-volatile memory and accepted by measuring program only after termination of programming mode as described below :

Pressing the E key at main menu level quits the programming mode. Software then checks whether one has altered existing settings (refered to as configuration). If no changes are detected, then converter goes back to measurement mode. If configuration has been changed, converter displays options UPDATE NO or UPDATE YES prompting you, if you really want to change existing configuration. When you say yes to update, then plausibility of the new configuration is checked. If there are no errors in plausibility checks, then only the new configuration is saved in nonvolatile memory and converter reverts to measurement mode as per the newly programmed configuration. (If any errors are detected in the plausibility checks then a new main menu level Fct 4.0 PARAM.ERROR is automatically created for you to correct for plausibility errors. The converter goes to programming mode at Fct 4.0 (See Sect. 5.6 for details of plausibility checks).

5.5 Error messages

5.5.1 Error messages in measurement mode

Error message (display 2

line)

INTL.ERR.nn * Internal error in converter

NO SIGNAL N No signal from the vortex

CHECK INST N Vortex sensor signal quality

LOW SIGNAL N Vortex signal amplitude too

HIGH SIGNAL N Vortex sensor signal

Type Description Corrective action required

Switch off the power and try again. If the problems

operation

persists contact KHRONE MARSHALL service. No flow through the primary or Vortex sensor

sensor

problem Check that 1. Flow rate > q min if OK. 2. Check for

is bad

excessive pipe vibration & proper installation. Check that 1. Flow rate > q min if OK contact

low.

KHRONE MARSHALL Service. This occurs very rarely. Check 1. Flow rate < q max

amplitude too high

if OK contact KHRONE MARSHALL Service.

LOW.FREQ. N Vortex frequency too low Check 1. Flow rate > q min else call KHRONE

MARSHALL Service.

HIGH.FREQ. N Vortex frequency too high check 1. Flow rate < q max else call KHRONE

MARSHALL Service.

LOW.FLOW N Flow rate lower than

minimum flow rate q min.

Converter will continue to display actual flow rate. However, accuracy of measurement may suffer. If flow rate reduces further, then other errors such as CHECK INSTALL,LOW SIGNAL will be generated

HIGH.FLOW N Actual flow rate higher than

q max.

Corrective action depends on application process. If flow rate exceeds too much further it may damage entire instrument physically !

LOW.TEMP. OPR N Operating temp. lower than

Corrective action depends on the process.

limit.

HIGH.TEMP.OPR N Operating temp. higher than

Corrective action depends on the process.

limit

LOW.PRES. OPR N Operating pressure lower

Take corrective action depending on the process.

than limit.

HIGH.PRES. OPR N Operating pressure higher

Corrective action is process dependent.

than limit.

LOW.TEMP. PHY. N Operating temp. lower than

Take corrective action depending on the process.

physical limit.

HIGH.TEMP.PHY F Operating temp. higher than

physical limit.

LOW.PRES.PHY. N Operating pressure lower

Will cause damage to primary as well as signal converter ! Take corrective action depending on process.

than physical limit.

HI.PRES.PHY F Operating pressure higher

Will cause damage to primary and signal converter!

than physical limit.

T.SENS.SHORT N Temp. sensor / wires short

circuit.

T.SENS.OPEN N Temp. sensor open circuit. P.SENS.OPEN N Pressure sensor open

circuited

Indicates fault in temperature/pressure sensor. Contact KHRONE MARSHALL Service. You may use signal converter with temperature or pressure compensation offline in the mean time till you get the service. P&T values entered through menu are used.

INV. CONFIG F Configuration data in non-

volatile memory is not valid.

Check entire configuration again. If error persistscall for service

LINE.INTR N Mains power to the

instrument was interrupted.

This error is generated only when totalizer is on to indicate that internal totalizer could not totalize flow during period of the power failure. Acknowledge & reset the error by keying in E é è

* This text is displayed for a wide variety of errors and most of them are Fatal in nature. The nature of error is

beyond the scope of user (failure of IC or other hardware inside converter electronics etc.) We therefore suggest the user to switch OFF power and then try again. If error message continues, call KHRONE MARSHALL service. nn = internal error number.

Type N indicates non fatal errors whereas F indicates fatal errors. ·

Measurement stops if any Fatal error is encountered. This means flow rate q = 0, current output to minimum

value 0/4 mA or to error value 2/22 mA (as per programming of current output), frequency output = 0Hz.

When errors are displayed during the measuring mode, “n Err” (n = number of errors) will appear in the 1st line. n gives the number of momentarily occuring errors that are displayed alternately with the actual measured value.

Error messages disappear when their cause disappears.

5.5.2 Error messages in programming mode

Error in programming mode can only occur while entering any numerical value. When you enter numerical value outside possible limits you get message “ nnnn.nnnn ” in 1

line and MIN. VALUE or MAX. VALUE in the 2nd line (“MIN. VALUE ” if entered value is less than lower limit and “MAX. VALUE” if higher limit is crossed). Note the message indicating permissible limit; then press the E key to continue.

5.5.3 Other Error messages

VFM 5090(I) signal converter does lot of mathematical computations to calculate various physical parameters and other quantities. Math functions of the instrument software will generate errors for cases such as divide by zero, square root of a -ve number etc. Such errors are never expected to occur in VFM 5090(I). If ( due to corruption of memory data or in the unlikely event of a software ‘bug’) any math error occurs, instrument cannot function since there is no simple recovery and it annunciates errors such as - HALTED - RUN.TIME.ERR then DEVIDE.BY O or other math error message. All measurement functions are stopped, display continuously annunciates the same message. In such a case switch OFF the mains supply and then switch ON again. If the same error occurs again contact KHRONE MARSHALL Service.

5.6 Plausibility checks

These checks are carried out when operator leaves programming mode and desires to save the new configuration in non-volatile memory. These checks detect whether the configuration as a whole is plausible or not. If any error(s) are detected in plausibility checks, a new main menu level Fct. 4.0 PARAM.ERROR is automatically created. The functions under PARAM.ERROR enable you to correct parameters which caused plausibility checks to fail. To understand the concept, consider the following example :

Fct 3.1.1 NOMINAL.DIA is DN 50 & Fct. 3.1.2 K-FACTOR is 6250. Then operator changes Fct. 3.1.2 NOMINAL.DIA as DN 80 and attempts to save the configuration. Now the limits for K factor are 1740 to 2730

for DN 80 which are dependent on nominal diameter of primary. Since the K factor lies outside valid limits, plausibility check will fail. Operator should then change the K factor under Fct. 4.1 K-FACTOR.. Thus when the operator changes a menu function without changing other functions whose validity depended on the changed function, the error gets trapped by the plausibility checks. Plausibility checks are designed to resolve all such interdependencies, to ensure that the configuration as a whole is plausible to work with.

5.7 Options available with VFM5090(I)

5.7.1 METER TYPE

1. Heat Meter

VFM-5090(I), supports thermal power and energy calculations for Steam and Water. Thermal power is calculated on line from the mass flow and specific enthalpy, at the operating P&T and thermal energy is calculated by time integrating (totalizing) thermal power. An energy totalizer is provided to accumulate the thermal energy.

The thermal power can be displayed in one of the following units -

KJ/hr, MJ/hr, GJ/hr, BTU/hr, KCal/hr, KW and MW.

Corresponding units for energy display are - KJ, MJ, GJ, BTU, KCal, KWh and MWh.

2. FAD Meter

An air compressor sucks in air from the atmosphere and delivers it compressed to the required pressure. Since atmospheric air contains water vapour, what the compressor actually sucks in is a mixture of air and water vapour. Under these conditions the Free Air Delivery specification of the compressor is not directly and easily known. Almost all manufacturers specify FAD at standard suction conditions only. What the user gets to use as eventual plant air or process air needs to be found out and hence metered with ease and a reasonable accuracy of at least ±1%.

VFM 5090(I) FAD-METER can measure FAD on-line, compensated for humidity and RPM apart from its use as STD FLOWMETER.The software built into the meter evaluates the FAD automatically on line. The menu driven user friendly software prompts the user for information like ambient temperature, pressure and relative humidity, design & actual RPM, and discharge pressure. The steam tables and compressibility data are programmed into the memory as a standard feature. There is a temperature sensor which measures on line discharge temperature. The meter is also available with an optional pressure sensor which measures the discharge pressure on-line eliminating the need to feed in the value manually.

3. AGA Natural Gas Meter

The special version software is made with added capability for density computation according to American Gas Association (AGA) standards.

AGA Natural Gas Meter - This software is made with the purpose of using VFM5090(I) Meter as a Natural Gas meter which accurately calculates the density value of the gas mixture at given temperature and pressure so that the mass flow and normalized mass flow calculations will be very much accurate. Please note that this is a special version and supports only natural gas and gas mixture applications.

Heat Meter - The same software can be used to calculate the thermal power and energy for natural gas applications. Heat value of the gas mixture is also available. Thermal power at the operating P&T is calculated on line using the composition of natural gas. Thermal energy is calculated by time integrating (totalizing) thermal power. An energy totalizer is provided to accumulate the thermal energy.

Heat value, compressibility factor and thermal power at the operating P & T is calculated on line using the composition of natural gas.

Heat vale of the mixture can be displayed in one of the following units -

KJ/m3, MJ/m3, GJ/m3, BTU/ft3, BTU/in3, KCal/m3

The thermal power can be displayed in one of the following units -

KJ/hr, MJ/hr, GJ/hr, BTU/hr, KCal/hr, KW and MW.

Corresponding units for energy display are - KJ, MJ, GJ, BTU, KCal, KWh and MWh.

The gas components supported are

Methane

Ethane

Hydrogen Sulfide

Oxygen

i-Pentane

n-Heptane

n-Decane

4. Net Heat Meter

Nitrogen

Propane

Hydrogen

i-Butane

n-Pentane

n-Octane

Helium

Carbon Dioxide

Water

Carbon Monoxide

n-Butane

n-Hexane

n-Nonane

Argon

VFM-5090(I) supports net thermal power and net energy calculations for saturated steam and water. Thermal power is calculated on line from mass flow and specific enthalpy both at the inlet of the process and at the outlet. The difference between these two values is the net thermal power. The net thermal energy is calculated by time integrating (totalizing) the net thermal power. The mass flow is measured by the VFM along with the temperature at that point. The temperature at the exit of the process is also measured and transmitted (4 to 20 mA) to the VFM through an additional junction box. The mass flow rate at the inlet and outlet of the process is assumed to be the same.

et or external thermal power can be displayed in any one of the following units.

KJ/hr, MJ/hr, GJ/hr, BTU/hr, KCAL/hr, KW, MW.

et thermal energy units may be displayed in one of the following units.

KJ, MJ, GJ, BTU, KCAL, KWH, MWH.

For external temperature sensing, 2 wire RTD transmitter can be used. This should have current output 4 to 20 mA.& Accurac

better than +/- 0.25% of full scale .

5.7.2 OUTPUT TYPE

1. RS-232 OUTPUT

The RS-232 output option provides a means for communication of measured values to remote system. At present, this communication is in one direction only [from VFM 5090(I) to remote system]. Measured values as well as Error Messages which appear on the instrument display in the normal measurement mode are output on RS-232 line. When the RS-232 output option is present, the usual frequency output function cannot be used.

1.1 RS-232 OUTPUT

The RS-232 output is galvanically isolated from all inputs and output circuits but not from current output.

Therefore, only one grounded receiver may be connected to either RS-232 output or current output. Note that connecting RS-232 to IBM PC/compatibles will ground the RS-232 output.

Operating data for RS-232 output is not programmable as in case of current or frequency output. VFM 5090(I) always uses the following operating data : 1 Start bit, 8 Data bits, No Parity, 1 Stop bit at a baud rate of 1200 bits/sec.

Connection diagram for RS-232 output is given below. Please note that the RS-232 output uses the same terminals as used by the Frequency output. Consequently, when the RS-232 option is present, frequency output function can not be used.

5 + 6 - 4

RXD

4.1 TXD

4.2 GND

1.2 CHARACTER FORMAT

Measured values or Error messages which appear on instrument display in normal measuring mode are coded as series of 8-bit characters or “bytes”. These are transmitted serially, using a conventional UART (Universal Asynchronous Receiver/Transmitter) function to serialize each byte. As in RS-232 or other asynchronous communication, a start bit and stop bit are added to each byte. This allow the receiving UART to identify the start of each character.

A single 8-bit byte is sent as the following sequence of 1’s and 0’s.

0 DO D1 D2 D3 D4 D5 D6 D7 1

Start bit <---------------------8 Data Bits -----------------------> Stop bit

Baud Rate is 1200 bits/sec. All characters are encoded in ASCII character format.

1.3 DATA FORMAT

Format for transmitting Measured values or Error messages is as follows :

Measured

Value

unit <CR> <LF>

#nn Err#

error mesg.

where,

Measured Value Numeric value of measured parameter as displayed in numeric field. <SP> ASCII space character. unit Unit of the measured value. <CR> <LF> ASCII carriage return and line-feed sequence.

#nn Err# nn is the number of errors detected by the instrument. error mesg. Error message as appears in the alphanumeric line of display.

examples -

1234.56 <SP> <SP> m3/hr <CR> <LF> # 1 Err# <SP> <SP> LOW FLOW <CR> <LF>

Note that the actual number of characters in each format is not fixed and depends on the contents of Measured Value, unit and error mesg. fields. The user system may use the 2 space characters and CR, LF characters as delimiters for fields.

2. RS-485 OUTPUT

The RS-485 output option provides a means for communication of measured values to remote system such as steam flow indicator. At present, this communication is in one direction only [from VFM5090(I) to remote system]. Measured Values as well as Error Messages which appear on the instrument display in the normal measurement mode are output on RS-485 line. When the RS-485 output option is present; the usual frequency output function cannot be used.

2.1 RS-485 OUTPUT

The RS-485 output is galvanically isolated from all inputs and output circuits but not from current output.

Therefore, only one grounded receiver may be connected to either RS-485 output or current output.

Operating data for RS-485 output is not programmable as in case of current or frequency output. VFM 5090(I) always uses the following operating data : 1 Start bit, 8 Data bits, Odd Parity, 1 Stop bit at a baud rate of 1200 bits/sec.

Connection diagram for RS-485 output is given below. Please note that the RS-485 output uses the same terminals as used by the Frequency output. Consequently, when the RS-485 option is present, frequency output function can not be used.

5 + 6

TX+

4.1 TX-

4.2 GND

2.2 CHARACTER FORMAT

Measured values or Error messages which appear on instrument display in normal measuring mode are coded as series of 8-bit characters or “bytes”. These are transmitted serially, using a conventional UART (Universal Asynchronous Receiver/Transmitter) function to serialize each byte. As in RS-485 or other asynchronous communication, a start bit and stop bit are added to each byte. This allow the receiving UART to identify the start of each character.

A single 8-bit byte is sent as the following sequence of 1’s and 0’s.

0 DO D1 D2 D3 D4 D5 D6 D7 P 1 Odd Start bit <------------------------ 8 Data Bits ------------------- > Parity Stop bit Baud Rate is 1200 bits/sec.

All characters are encoded in ASCII character format.

2.3 FORMAT

Format for transmitting Measured values or Error messages is as follows :

If there are no Fatal Errors detected by 5090(I) :

:QV<QVval><sp><sp><QVunits><sp><sp> :QN<QNval><sp><sp><QNunits><sp><sp> :QM<QMval><sp><sp><QMunits><sp><sp> :TV<TVval><sp><sp><TVunits><sp><sp> :TN<TNval><sp><sp><TNunits><sp><sp> :TM<TMval><sp><sp><TMunits><sp><sp> :PR<PRval><sp><sp><PRunits><sp><sp> :TR<TRval><sp><sp><TRunits><sp><sp> :VE<VEval><sp><sp><VEunits><sp><sp> :FR<FRval><sp><sp><FRunits><sp><sp> :TP<TPval><sp><sp><TPunits><sp><sp> :TE<TEval><sp><sp><TEunits><sp><sp> :QF<QFval><sp><sp><QFunits><sp><sp> :XT<XTval><sp><sp><XTunits><sp><sp> :XP<XPval><sp><sp><XPunits><sp><sp> :NP<NPval><sp><sp><NPunits><sp><sp> :NE<NEval><sp><sp><NEunits><sp><sp> :H<ID>E# nn Err#<sp><sp> :m<mesg m><cr><lf>

If there are Fatal Errors detected by 5090(I) then measurement is not made and transmitted :

:FEFATAL.ERROR<cr><lf> :H<ID>E# nn Err#<sp><sp> :<mesg m><cr><lf>

where,

QVval Numeric value of measured volumetric flowrate. QVunit Unit of the volumetric flowrate value. QNval Numeric value of measured normalised flowrate. QNunit Unit of the normalised flowrate value. QMval Numeric value of measured mass flowrate. QMunit Unit of the mass flowrate value. TVval Numeric value of computed totalised volumetric flow. TVunit Unit of the totalised volumetric flow value TNval Numeric value of computed totalised normalised flow. TNunit Unit of the totalised normalised flow value TMval Numeric value of computed totalised mass flow. TMunit Unit of the totalised mass flow value PRval Numeric value of the operating pressure. PRunit Unit of the operating pressure TRval Numeric value of operating temperature. TRunit Unit of the operating Temperature. VEval Numeric value of flow velocity. VEunit Unit of the flow velocity. FRval Numeric value of measured vortex frequency FRunit Unit of measured vortex frequency TPval Numeric value of computed thermal power TPunit Unit of thermal power TEval Numeric value of computed thermal energy TEunit Unit of thermal energy QFval Numeric value of computed FAD QFunit Unit of FAD XT val Numeric value of measured external temperature

+ 56 hidden pages