KROHNE DWM 2000 D Manuel utilisateur

DWM 2000 D

DWM 2000 Electromagnetic Flowmeter with LCD Indicator

Operating instructions

2 Operating Instructions DWM 2000 D

Contents

1Display data in operating mode…………………………………………………………………..3

2Functions of the LCD indicator for the DWM 2000 D ………………………………………..4

2.1Programmable parameters ………………………………………………………………………..4

2.1.1 Flow calibration ………………………………………………………………………4

2.1.2 Current output adjustment ………………………………………………………….4

2.1.3 Time constant ………………………………………………………………………..4

2.2 Electronics module checks ……………………………………………………………………..5

2.3 Programming structure (Software n° 1.02) ………………………………………………………5

2.3.1 User interface buttons ………………………………………………………………5

2.3.2 Menu naviagation ……………………………………………………………………6

2.3.3 Summary of programming menus …………………………………………………8

2.4Parameters stored in the EEPROM (menu 2.4.3) …………………………………………….10

2.5 Error message list ………………………………………………………………………………..11

Operating Instructions DWM 2000 D 3

1 Display data in operating mode

4 Operating Instructions DWM 2000 D

2 Functions of the LCD indicator for the DWM 2000 D

2.1 Programmable parameters

2.1.1 Flow calibration

The GKcan be modified in menu 2.1.3 in order to obtain the maximum accuracy at operating

conditions. A field calibration requires an accurate reference of velocity. The meter recalibration (GK

modification) is also recommended after an exchange of electronics module.

The value of the new calibration constant (GKnew) can be calculated as follows:

GKnew = GKold x Va

with:

Va = actual velocity

Vm = measured velocity (reference value)

2.1.2 Current output adjustment

The minimum value (i0%) and the maximum value (i100%) of the current output at normal operating

conditions can be adjusted from menus 2.2.2. and 2.2.3.

The actual values of the i0% and the i100% must be measured with an accurate milliammeter in a

4...20 mA loop.

i0% must be in the range 3....12 mA. The factory setting is 4 mA.

i100% must be in the range 12....21 mA. The factory setting is 20 mA.

2.1.3 Time constant

The time constant value can be set in menu 2.2.4. This value represents the time needed to detect

63% of a simulated flow rate instantaneously raised from 0 to 100%. Time constant range : 5, 10,

15, 20, 25, 30, 50 m.

Operating Instructions DWM 2000 D 5

2.2 Electronics module checks

Various parameters from the electronics module can be viewed directly for troubleshooting

purposes.

The DWM 2000 switches to alarm mode when the current output is permanently below 3 mA. In this

case the current output value indicates the type of error that occurs:

Obey the instructions that follow to find faults and the corrective actions to be undertaken.

Call up the error messages (menu 1.2.2.) and note the last one.

Refer to the error message list. Replace the electronics module in case of fatal error, deactivate the

alarm mode in menu 1.2.1. or the alarm count in menu 1.2.4 (in case of minor error).

CAUTION

Make sure that the instrument is correctly grounded.

Install the instrument in the sequence given in the installation manual.

A bad mechanical or electrical connection will cause the DWM 2000 to operate

incorrectly.

2.3 Programming structure (Software n° 1.02)

2.3.1 User interface buttons

6 Operating Instructions DWM 2000 D

2.3.2 Menu navigation

Go through the steps given in the illustrations that follow to get to the required menu.

Operating Instructions DWM 2000 D 7

8 Operating Instructions DWM 2000 D

2.3.3 Summary of programming menus

Fct. n° Text Description and settings

1.0.0. TEST Main menu 1.0.0.

1.1.0. CHECK ALL Sub menu 1.1.0. for check of electronic components

1.1.1. MAG. FEQ. Frequency of magnetic field

10 Hz ≤frequency ≤14.5 Hz, operating mode

1.1.2. FULL SCALE Programmed full scale

1 m/s ≤full scale ≤8 m/s

1.1.3. U REF Internal voltage reference

U Ref. = 2.5 V

1.1.4. AMPLI Test value of amplifier control loop

Value ≥40 in test mode

1.1.5. EEP CHECKS Result of data check in EEPROM

“XXX”: measured value = test has been successful

“XXX + ALARM”: test has failed and alarm mode has been

activated (current output value < 4 mA).

1.1.6. EP CHECKS Result of data check in EEPROM

Value = 22309

1.1.7. ZERO KEY Result of zero calibration push button test

“OK”: test has been successful; “ALARM”: The test has failed

and alarm mode has been activated (current output < 4 mA).

This is only a test and does not reset the instrument to zero.

Refer to the installation manual to use the Zero Cal button on

the DWM 2000 electronics block correctly.

1.2.0. DIAGNOSTIC Sub menu 1.2.0. Diagnostic

1.2.1 ALARM MODE Deactivation of the alarm mode (current output < 4 mA) caused

by test failure (see menu 1.1.2. to 1.1.7).

“YES”: alarm mode is enabled

“NO”: alarm mode is disabled

1.2.2. REG FAIL. All the error messages that have occurred since the first power-

up are listed. Maximum storage capacity: 32 messages

See section “2.5 Error Message List” for the meaning of error

messages.

1.2.3. TEST MODE Activation of PRODUCT (factory auto-diagnostic test mode) or

CUSTOM (field auto-diagnosis test mode = less severe).

Default setting: CUSTOM (field test mode)

1.2.4. ALARM COUNT Reset of the alarms counter

2.0.0. SET UP

PARAMETER Main menu 2.0.0.

2.1.0. DATA BASE Sub menu 2.1.0. Base data

2.1.1. FULL SCALE Not available.

2.1.3. GK VALUE Primary head calibration constant 0.8 ≤GK≤1.300

See section “1.1.1. Flow calibration” on how to recalculate GK.

2.1.4. CORRECTION Activation of the low flow linearization for velocity below 3 m/s.

Select “YES” or “NO”, default setting:“YES”

Operating Instructions DWM 2000 D 9

Fct. n° Text Description and settings

2.2.0. CURRENT OUT Sub menu 2.2.0. Current output

2.2.1. CURRENT? Not available

2.2.2. I 0% Calibration of the current output for i0%

Measure the exact value on a milliammeter and press the “+” or

“-” key in order to obtain the wished value for i0%

3 mA ≤i0% ≤12 mA

2.2.3. I 100% Calibration of the current output for i100%

Measure the exact value on a milliammeter and press the “+” or

“-” key in order to obtain the wished value for i100%

12 mA ≤i100% ≤21 mA

2.2.4. TIME CONST. Time constant for output of the measured values

Range: 5, 10, 15, 20, 25, 30, 50 m

2.4.0. SPECIAL Sub menu 2.4.0. Special functions

2.4.1. LANGUAGE Language for display text

“GB”: English

“F”: French

“D”: German

2.4.2. PASSWORD Not available

2.4.3. EEP PARAM. Display of the different parameters memorised in the

EEPROM: see section “2.4 Parameters Stored in the

EEPROM”. Read only.

2.4.4. FILTER Activation of an electronic filter for noisy applications

(foam, solid contents).

Select “YES” or “NO”, default setting “YES”.

2.4.5. DISPLAY Display of the actual velocity in m/s. The velocity is displayed

after quitting the programming menu.

Select “YES” or “NO”. Default setting “NO”.

It must be programmed to “NO” before you disconnect the

DWM 2000 D.

2.4.6. DIAMETER Diameter of the pipe into which the sensor is inserted. This

value is needed for calculating the flow rate. If you enter a

value of “0”, this switches off flow rate on the indicator display.

Refer also to the CAUTION that follows.

50 mm ≤diameter ≤XXXX mm

CAUTION

Do not use menu 2.4.6 to read the setting for the pipe diameter. This will reset

the value to default “0” and switch off the flow rate line on the indicator

display. Use menu 2.4.3 to read EEPROM settings (this includes DIAMETER).

If the value is reset to “0”, you must re-enter the pipe diameter in menu 2.4.6.

10 Operating Instructions DWM 2000 D

2.4 Parameters stored in the EEPROM (menu 2.4.3)

Paramete

Comment Typical value

CHECKS 1 Check EEPROM n°1 -

CHECKS 2 Check EEPROM n°2 -

CHECKS BYTE 1 Check EEPROM -

CHECKS BYTE 2 Check EEPROM -

CPT ALARM. Counting of all the error messages

since the first power-up. -

CPT ALARM.2: Counting of all the error messages

since the last reset. -

TEST Indication of auto diagnostic test

level CUSTOM

CORRECTION

YES/NO Indication of activation of low velocity

linearization. YES

EP CHECKS Result of the data check in EPROM

(see menu 1.1.6.) Value = 22309

With soft V1.02

FS Display of the programmed full scale

values (see menu 1.1.2.) 1 m/s ... 8 m/s

GK Primary head calibration constant

(see menu 2.1.3.) 0.8 ... 1.3

U REF Internal voltage reference

(see menu 1.1.3.) 2.4. ... 2.6.

T CST Time constant (see menu 2.2.4.) 5 s

TEST AMP Test value of the amplifier control

loop (see menu 1.1.4.) 75 ... 95

FM Frequency of the magnetic field

(see menu 1.1.1.) 10 ... 14.5 Hz

DIAMETER Diameter of pipeline

(see menu 2.4.6) ≥50 mm

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