KROHNE DWM2000LCD User Manual

DWM 2000 D

DWM 2000 Electromagnetic Flowmeter with LCD Indicator

Operating instructions

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

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

2.4

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







2 Operating Instructions DWM 2000 D

1 Display data in operating mode

Operating Instructions DWM 2000 D 3

2 Functions of the LCD indicator for the DWM 2000 D

2.1 Programmable parameters

2.1.1 Flow calibration

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

The G

K

conditions. A field calibration requires an accurate reference of velocity. The meter recalibration (G
modification) is also recommended after an exchange of electronics module.
The value of the new calibration constant (GK new) can be calculated as follows:

GK
Vm
with:
Va = actual velocity
Vm = measured velocity (reference value)

2.1.2 Current output adjustment

The minimum value (i
conditions can be adjusted from menus 2.2.2. and 2.2.3.
The actual values of the i0% and the i

4...20 mA loop.

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

i

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

100%

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.

new = GKold x Va

) and the maximum value (i

0%

must be measured with an accurate milliammeter in a

100%

) of the current output at normal operating

100%

K

4 Operating Instructions DWM 2000 D

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

Operating Instructions DWM 2000 D 5

2.3.2 Menu navigation

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

6 Operating Instructions DWM 2000 D

Operating Instructions DWM 2000 D 7

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 power­up 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

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

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

Main menu 2.0.0.

See section “1.1.1. Flow calibration” on how to recalculate G
Select “YES” or “NO”, default setting:“YES”

.

K

8 Operating Instructions DWM 2000 D

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% Calibrati on 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 ≤ i

2.2.3. I 100% Calibration of the current output for i
Measure the exact value on a milliammeter and press the “+” or
“-” key in order to obtain the wished value for i
12 mA ≤ i

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 d iameter. 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.

≤ 12 mA

0%

100%

≤ 21 mA

100%

100%

Operating Instructions DWM 2000 D 9

r

2.4 Parameters stored in the EEPROM (menu 2.4.3)

Paramete

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

CPT ALARM.2: Counting of all the error messages
TEST Indication of auto diagnostic test
CORRECTION

YES/NO
EP CHECKS Result of the d ata check in EPROM

FS Display of the programmed full scale
GK Primary head calibration constant
U REF Internal voltage reference
T CST Time constant (see menu 2.2.4.) 5 s

TEST AMP Test value of the amplifier control
FM Frequency of the magnetic field
DIAMETER Diameter of pipeline

Comment Typical value

-

since the first power-up.

-

since the last reset.

CUSTOM
level
Indication of activation of low velocity
linearization.

(see menu 1.1.6.)
values (see menu 1.1.2.)
(see menu 2.1.3.)
(see menu 1.1.3.)

loop (see menu 1.1.4.)
(see menu 1.1.1.)
(see menu 2.4.6)

YES

Value = 22309

With soft V1.02

1 m/s ... 8 m/s

0.8 ... 1.3

2.4. ... 2.6.

75 ... 95

10 ... 14.5 Hz

≥ 50 mm

10 Operating Instructions DWM 2000 D

A

2.5 Error message list

Listed below are the messages which can appear in menu 1.2.2. This function stores all the faults
that have occurred since the first connection to power.

Error
messages

MAG. FREQ

AMPLI

F.S.

ZERO KEY
EP CHECK
EEP CHECK

U REF
CURR. OUT

FS SWIT EEP
ZERO

Comment

No magnetic field frequency out of range
10 Hz ≤ frequency ≤ 14.5 Hz
Dysfunction of the amplifier loop

Programmed full scale out of range
(>8 m/s or <1 m/s).
Dysfunction of ZERO key (short circuit) Replace the electronics module
Data loss in EPROM (software) Repl ace the electronics module
Data loss in EEPROM (calibration and
calculation data)
Amplifier voltage reference is damaged Replace the electronics module
Incorrect position of the internal current output
switch
Modification of the full scale power on Program the full scale power off
Velocity measurement during the zero
adjustment is more than 0.2 m/s.

ctions

Replace the electronics module
Replace the electronics module
Replace the electronics module

Replace the electronics module

Replace the electronics module

Deactivate the alarm mode and
adjust the zero again

Operating Instructions DWM 2000 D 11

DWM 2000 D

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KROHNE measuring technology - Product overview

• Electromagnetic flowmeters • Level measuring instruments

• Variable area flowmeters • Temperature measuring instruments

• Mass flowmeters • Pressure measuring instruments

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• Vortex flowmeters • Oil and gas industry

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