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

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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