Endress+Hauser nivocompact FTC 831 Скачать руководство пользователя страница 5 | Manualshive

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Endress+Hauser nivocompact FTC 831 Скачать руководство пользователя страница 5

Application

The Nivocompact FTC 831 is used for limit detection in silos containing bulk
solids (for minimum or maximum indication).
Also for use in the food processing industry.
For mounting in silos from above.

Application Examples

Lime

Kaolin

Grain

Spices

Plaster

Plastic Flour

Semolina

Cement

granulates

Fodder

and similar bulk solids

Note:
Bulk solids should have dielectric constants

ε

r

≥

1.6.

Please contact us for advice if the dielectric constant of the bulk solid is not
known.

Fig. 1
Limit detection in bulk solid silos with the
capacitive level limit switch Nivocompact
FTC 831.

Application

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Содержание nivocompact FTC 831

Страница 1: ...nivocompact FTC 831 Level Limit Switch Installation and Operating Manual BA 024F 00 en 07 98 015191 0001 Hauser Endress The Power of Know How...

Страница 2: ......

Страница 3: ...ion 13 Wiring Connection 13 EC 40 Two Wire Connection for AC 14 EC 42 Three Wire PNP for DC 15 EC 43 Three Wire NPN for DC 16 EC 44 Relay output for DC and AC 17 Wiring On Site 18 Calibration 19 Switc...

Страница 4: ...Nivocompact FTC 831 2...

Страница 5: ...from above Application Examples Lime Kaolin Grain Spices Plaster Plastic Flour Semolina Cement granulates Fodder and similar bulk solids Note Bulk solids should have dielectric constants r 1 6 Please...

Страница 6: ...IN ISO 228 I Process connection material glass fibre reinforced polyester PBTP Probe material reinforced steel wire mesh and electronics with PE coating Insulation from material fully insulated Probe...

Страница 7: ...Fig 2 Dimensions Nivocompact FTC 831 Technical Data 5...

Страница 8: ...ous max 350 mA Residual current with transistor blocked 100 A Protected against reverse polarity Power supply U 20 V 200 V or Power supply U 21 V 250 V 50 60 Hz Current consumption rms max 5 mA Peak i...

Страница 9: ...is an electronic switch The entire measuring system consists of Nivocompact FTC 831 power supply and connected control systems switches signal transmitters e g process control systems PLC relays micro...

Страница 10: ...hen the capacitance CA increases and with it the time constant This change in the time constant is evaluated and the Nivocompact FTC 831 is activated according to its switching mode Safety Switching T...

Страница 11: ...om the probe end of an FTC 831 to the probe end of an FTC 731 must also be at least 500 mm The distance from the probe end of a Nivocompact FTC 831 to the silo wall or to any material build up must be...

Страница 12: ...tensile forces present at this point may damage the probe or subject the silo roof to excessive strain e Too near the silo wall When swinging gently the probe can hit the wall or touch any build up w...

Страница 13: ...rn the instrument by the 60 AF nut only If the instrument will not turn easily then slightly cut into the thread of the boss A torque of 80 Nm 100 Nm is normally sufficient to produce a reliable seal...

Страница 14: ...n the electronic insert Remove the plug in electronic insert from the housing using the handle Slightly loosen the 3 screws in the housing see Fig 7 Rotating The housing can now be rotated through 360...

Страница 15: ...hat the rating of the fine wire fuse corresponds to the maximum load to be connected The fine wire fuse does not protect the electronic insert of the Nivocompact FTC Diameter of Wiring Because of the...

Страница 16: ...e drop across the connected load Load Cut off Note that loads connected in series are not completely disconnected from the power supply if the electronic switch in the electronic insert of the Nivocom...

Страница 17: ...n normal switching mode The transistor is blocked on level alarm or with a power failure Protection Against Voltage Peaks Connecting to an instrument with a high inductance a voltage limiter should be...

Страница 18: ...witching mode The transistor is blocked on level alarm or with a power failure Protection Against Voltage Peaks Connecting to an instrument with a high inductance a voltage limiter should be connected...

Страница 19: ...n between Terminal 3 and Terminal 4 on level alarm or with a power failure Protection Against Voltage Peaks and Short Circuiting Protect the relay contact by connecting a spark barrier to instruments...

Страница 20: ...10 mm A suitable gasket must also be used for other cable diameters You can seal with the water tight cable gland with cable having diameters from 5 mm to 12 mm Ensure that there is a good short groun...

Страница 21: ...over the terminals with insulating tape before calibration Turn on the power supply Switching Delay Set the switching delay to between approx 0 5 s and 20 s Refer to Fig 15 The time interval is the s...

Страница 22: ...e The circuit is blocked if the probe is covered or the power supply fails Minimum fail safe The circuit is blocked if the probe is covered or the power supply fails Changing the fail safe mode also c...

Страница 23: ...ry set value may also be required if the minimum distances cannot be maintained For this calibration the silo must be empty or the level must be at least 100 mm below the probe The adjuster for calibr...

Страница 24: ...required refer to Page 20 Fig 18 The capacitance calibration must be carried out both slowly and carefully Fig 19 Accurate adjustment ensures high switching reliability Material characteristics bulk...

Страница 25: ...any material build up on the end of the probe With initial but permanently low material build up Carry out another capacitance calibration after the material build up if the Nivocompact does not swit...

Страница 26: ...tant of the material too small Different material used than calibrated for Drier material used than calibrated for Cable damaged Fig 20 Troubleshooting with maximum fail safe mode Error with minimum f...

Страница 27: ...he cable see Page 26 Carry out a new capacitance calibration with an empty silo Check operation Returning Parts for Repair If a Nivocompact FTC 831 cannot be repaired and needs to be sent back to Endr...

Страница 28: ...he cable up from below The terminal clamps will come out at the top Shortening Push the cable upwards from below to the correct cable length Cut off the cable about 150 mm above the hexagonal nut univ...

Страница 29: ...upper part of the Nivocompact FTC 831 Above right The cores shown being cut off and the plug connector pulled apart Below right Diagram to show how far the shortened cable projects out from the threa...

Страница 30: ...g base for the electronic insert with mounting on the central threaded rod in the housing The plug base should lie approximately opposite the ground screw Put the plug connector and cores right at the...

Страница 31: ......

Страница 32: ...L Cochabamba Tel 042 56993 Fax 042 50981 Brazil Samson Endress Hauser Ltda Sao Paulo Tel 011 5363455 Fax 011 5363067 Canada Endress Hauser Ltd Burlington Ontario Tel 905 6819292 Fax 905 6819444 Chile...

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