APR-2000ALW
7Pages

SMART DIFFERENTIAL PRESSURE TRANSMITTER WITH TWO DIAPHRAGM SEALS MODEL APR-2000ALW (former APR-2200ALW) ü ü ü ü ü ü ü ü 4...20 mA output signal + HART 5 / HART 7 protocol /SIL3 Accuracy 0,1% SIL2 version y Safety version SIL2/SIL3 safet Intrinsic safety certificate ATEX, IECEx, FM (USA, Canada), INMETRO, UKCA, KCS Explosion proof certificate ATEX, IECEx, FM (USA, Canada), INMETRO, UKCA, KCS Marine certificate – DNV, BV Fully welded sensor guarantees tightness of oil system for many years Ability to configure measuring range locally Transmitter with two remote diaphragm seals Differential pressure transmitter Coiled excess capillary Capillary outlet in the axis of the diaphragm seal Diaphragm seals Example of a filter loss measurement Recommendations The version of the transmitter with two remote diaphragm seals is recommended for the measurement of pressure differences when the hydrostatic pressure of the manometric fluid in the capillaries (which depends on the vertical spacing of the seals) is significantly less than the measuring range of the transmitter. The best metrological results are obtained when the applied capillaries are identical, as short as possible, and terminated with identical seals. At such a configuration additional temperature errors, related to the remote sealing, affect both of the measurement chambers of the differential pressure transmitter in the same way, and thus cancel each other out.

Transmitter with two types of diaphragm seal: one – direct diaphragm seal and the other – remote diaphragm seal Upper remote diaphragm seal Capillary fastened to a guide Coiled excess of the capillary Differential pressure transmitter Lower direct seal Example of measurement of the level in a pressure tank Recommendations The transmitter with a direct diaphragm seal (connected to the positive measurement chamber) and a remote diaphragm seal (connected to the negative chamber) is recommended for hydrostatic measurements of: levels, densities, phase boundaries and pressure differences (with...

Example versions Aluminium casing with M20×1.5 packing gland Degree of protection IP 66 S-CompK diaphragm seal M20×1.5 or Æ51 S-DIN K diaphragm seal Æ50, Æ65, Æ80 Transmitter with two types of diaphragm seal: one – direct diaphragm seal and the other – remote diaphragm seal. The example with S-T DN80 diaphragm seal. S-ChK diaphragm seal transmitter with two remote diaphragm seals. Example with S-PK Note: The appropriate configuration of the complete set of pressure transmitter, diaphragm seals and capillaries, as well as the proper selection of manometric fluid, depends on several factors,...

The differential pressure transmitter is applicable to the measurement of pressure differences of: gases, vapours and liquids in cases where it is necessary to use seals and the pressure pulse source points may be several metres apart. Typical applications include the hydrostatic measurement of: levels in closed tanks, densities and phase boundaries, and the measurement of a filter loss, pressure differences between media in pasteurisers etc. The available range of the diaphragm seals allows measurement at great majority of media. The active element is a piezoresistant silicon sensor...

Nominal measuring range Process connections Electrical connection Accessories Other specification Description Ex ia IIC T5/T4 Ga/Gb Ex ia IIIC T105°C Da II 1/2 G Ex ia IIC T5/T4 Ga/Gb II 1 D Ex ia IIIC T105°C Da I M1 Ex ia I Ma (version with SS housing) II 1/2G Ex ia/db IIC T6/T5 Ga/Gb II 1/2D Ex ia/tb IIIC T85°C/T100°C Da/Db Packing gland available on I M2 Exd ia I Mb (version with SS housing) request Ex ia/db IIC T6/T5 Ga/Gb IECEx Ex ia/tb IIIC T105°C Da/Db Ex db ia I Mb (version with SS housing) II 2G Ex db ia IIC T6/T5 Gb II 2D Ex ia tb IIIC T105°C Db Packing gland available on request...

To simplify the mathematical operations we introduce the density coefficient of the medium Xr. Xr = Since the density of water at 4°C is 1 g/cm3, the density coefficient Xr is numerically equal to the density of the medium expressed in g/cm3. To determine the hydrostatic pressure of a column of liquid in mm H2O, it is sufficient to multiply the height of the column h [mm] by the density coefficient of the liquid Xr. Since it is easy to determine the hydrostatic pressure in mm H2O and the transmitter can be configured in those units, in the descriptions of measurement methods given below we...

6. Connect the KAP-03 communicator, identify the transmitter and select the “configuration” function. 7. On the configuration menu select “Reranging” procedure. 8. On the “Reranging” menu: a) change the measurement units to mm H2O at 4°C; b) enter the calculated values for the start (–1404) and end (396) of the range. When the transmitter has been configured in this way it is ready to be used to carry out the given measurement task. Note: If it is possible to fill the space between the seals with a liquid whose density corresponds to the start of the measurement range, the start of the...