Dwm 2000 руководство по эксплуатации

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  DWM 2000 D Operating instructions DWM 2000 Electromagnetic Flowmeter with LCD Indicator…

• Page 2: Table Of Contents

  Contents     Display data in operating mode…………………………………………………………………..3     Functions of the LCD indicator for the DWM 2000 D ………………………………………..4     Programmable parameters ………………………………………………………………………..4   2.1.1 Flow calibration ………………………………………………………………………4   2.1.2 Current output adjustment ………………………………………………………….4   2.1.3 Time constant ………………………………………………………………………..4  …

• Page 3: Display Data In Operating Mode

  Display data in operating mode Operating Instructions DWM 2000 D…

• Page 4: Functions Of The Lcd Indicator For The Dwm 2000 D

  Functions of the LCD indicator for the DWM 2000 D Programmable parameters 2.1.1 Flow calibration The G can 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 (G modification) is also recommended after an exchange of electronics module.

• Page 5: Electronics Module Checks

  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. Programming structure (Software n° 1.02) 2.3.1 User interface buttons Operating Instructions DWM 2000 D…

• Page 6: Menu Naviagation

  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…

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  Operating Instructions DWM 2000 D…

• Page 8: Summary Of Programming Menus

  Primary head calibration constant 0.8 ≤ G ≤ 1.300 2.1.3. GK VALUE See section “1.1.1. Flow calibration” on how to recalculate G 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…

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  “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. Operating Instructions DWM 2000 D…

• Page 10: Parameters Stored In The Eeprom (Menu 2.4.3)

  Test value of the amplifier control 75 … 95 loop (see menu 1.1.4.) Frequency of the magnetic field 10 … 14.5 Hz (see menu 1.1.1.) ≥ 50 mm DIAMETER Diameter of pipeline (see menu 2.4.6) Operating Instructions DWM 2000 D…

• Page 11: Error Message List

  FS SWIT EEP Modification of the full scale power on Program the full scale power off ZERO Velocity measurement during the zero Deactivate the alarm mode and adjustment is more than 0.2 m/s. adjust the zero again Operating Instructions DWM 2000 D…

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  DWM 2000 D nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn KROHNE measuring technology — Product overview • • Electromagnetic flowmeters Level measuring instruments • • Variable area flowmeters Temperature measuring instruments • • Mass flowmeters Pressure measuring instruments • • Ultrasonic flowmeters Analysis • • Vortex flowmeters Oil and gas industry •…

2.1Programmable parameters

2.1.1 Flow calibration

The GK can 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 (GK new) can be calculated as follows:

GKnew = GKold x Va

Vm

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.