UWT Lot. Table of contents. Continuous level measuring system SLS 3000 Technical information / Instruction manual. Page

Transcription

1 Table of contents 1 Page Introduction G Function / Approvals G Technical data G Electrical connection G Signal description G Parameter adjustment G Commissioning, Mounting, Safety instructions G Interface measurement with rope G Error code G Maintenance, Service interval G Rope change G1 Tape change G1 Remarks for use in Hazardous Locations G1 Subject to technical change. All dimensions in mm (inches). All units in this information are CE-certifi ed. We assume no liability for typing errors. Different variations to those specifi ed are possible. Please contact our technical consultants. gi0 page G 1

2 1 Introduction / Function / Approvals Introduction Function The UWT-LOT is an electromechanic level measuring instrument for continuous measuring of levels heights or volumes in hoppers, silos or tanks. It is used for monitoring the level in applications such as - powders - small grain bulk goods - coarse grain bulk goods Features - Suitable for most types of bulk goods - Resistant to: Dielectricity and conductivity of the bulk good Dust in the silo Changes in moisture of the product Products that are prone to sticking - No mechanical loading on the silo roof, the sensor weight only comes into contact with the surface of the material. - Easy installation and commissioning - High-tech measurement, easy to understand - Very accurate measurement - Output 0/-0mA - Range of measurement Rope version 0m (0ft) (on request up to 0m (0ft) possible) Tape version m (ft), Overall height of the silo m 0ft) - Approval for use in Hazardous Areas category 1/ D (zone 0/1) - Micro processor controlled measurement with intelligent monitoring - Internal tape cleaner for difficult materials - Different sensor weights, suitable for every application - Robust die cast housing, protection class IP UWT - LOT level measurement systems have withstood the test of time in various industries such as - Chemical industries - Food industry - Building materials industry - Plastics industry The UWT - LOT is mounted on the top of the silo. A sensor weight is wound down into the silo. It is mounted at the end of a rope or tape which is wound on a motor driven roller. Upon contact with material, the motor changes the winding direction and the sensor weight is wound back to the upper stop position. The unit is divided into two independently sealed chambers (tape chamber and electronic chamber). Only the tape chamber is in contact with the inside of the silo during measurement. If the sensor weight is in the upper stop position, it seals the opening between the unit and the silo. Pulses are generated during downward movement and the number of pulses can be processed directly by - a PLC (Programmable logic controller) or - a counter (see chapter "Display / Evaluation"). 0/-0mA output: The pulses are internally converted into an analogue current signal. The current signal can be adjusted according to the application which means that a volumetric signal based on the silo geometry is possible. The current signal is updated, when the sensor weight cimes into contact with the material. The measurement results from an external signal (contact or V DC). For automatic starting there is an integrated timer. The measurement is controlled by a microprocessor. A comparison between the distance the weight moves downwards, and the distance the weight moves upwards, is done. When there is a discrepancy a signal output is activated. This guarantees, that the sensor weight is always in the upper stop position. Approvals For the Lot, the approvals for Hazardous Locations (dust explosion) category 1/ D (zone 0/1) based on directive //EG are available. CE EMC EN -A1 General purpose EN -1 page G gi0

3 Technical data Dimensions For detailed dimensions of UWT - LOT see price list (pages P1 - P). fl ange dimensions similar to DN 0 PN1 1 Sensor weight must not go into the socket! The socket pipe prevents the sensor weight from colliding with the socket edges during upward movement of the weight. The lifetime of the rope is increased, due to less loading on the rope. Version with large socket pipe is available. Dimensions silo fl ange Socket Socket pipe Sensor weight Folding cover sensor weight If the sensor weight is used for measuring very light and loose bulk material, there is a risk that it could descend into the product. This can be prevented by using the folding cover which has a large surface area. The folding cover can be folded to fi t through the mounting socket DN0. Pin for sensor weight The sensor weight can be equipped with a pin Ømm (Ø0, ), which prevents the sensor weight from sliding on the bulk material. gi0 page G

4 1 Technical data Mechanical data Housing: Aluminium RAL 0 gentian blue Flange : black Protection class: IP according to EN 0 Process connection: Overall weight: Measuring rope: Measuring tape: Flange based on DN 0 PN1 Aluminium approx. 1kg (.Ibs) Stainless steel ø1mm (ø0.0 ) 1.01 (1) Stainless steel x0.mm (0. x0.00 ) 1. (01) Measuring interval Accuracy of measurement: Counting pulse: Connection diagram: cm (. ) / pulse (Option: 1cm (0. ) / pulse) Pulse output; 1 pulse (version with cm (. ) pulse) pulses (version with 1cm (0. ) / pulse) Current output: 1% Count: 0.1s ON; s OFF; Reset: 0.s Inside of the lid, datasheet Measuring range: Measuring speed: Sensor weight: max. 0m (0ft) Rope version max. m (ft) Tape version (for max. overall height of silo m (0ft) approx. 0. m/s (0.ft/sec) average (upward and downward movement) 1kg (.Ibs) Rope version 1.kg (.0Ibs) Tape version Sensor weight material: PVC or PA or 1.01 (0) Folding cover made from PET (canvas) Deviation of vertical mounting: max. off the vertical Pressure connection: Electrical data Power supply: Installed load: Quick coupling incl. opposite part for hose diameter mm (0. ); max. operating pressure 0.bar (.psi) 0V 0-0Hz V 0-0Hz both voltages +% / -1% 10VA Connection terminal: max..mm (AWG 1) Protection class: I Heating: Thermostat controlled 0V, 0W; Signal output: Operating conditions Silo pressure: Process temperature: Ambient temperature: Minimum time between measuring starts: rope/tape operating time: Upper stop position / Malfunction Floating relay contact max. 0V AC, A, 00VA bar (-...+.psi) - C..+0 C ( F) optional - C..+0 C ( F) - C.. +0 C (-0 C (- F) with ATEX 1/D) measuring height m (1.ft )-> min measuring height m (.ft) -> min measuring height 0m (.ft) -> min measuring height 0m (.ft) -> 1min see page G Cable entry: Signal output: pcs. Mx1. +1 pc. blind plug for cable diameter -1 mm ( ) pcs. NPT 1/ conduit connection pcs. NPT / conduit connection counting pulse and reset pulse fl oating relay contact max. 0V AC, A, 00VA fl oating current output 0/ - 0mA, ±0.1mA max. load 00Ω page G gi0

5 Electrical connection 1 Counting pulse Reset pulse Malfunction (opens when malfunction) Upper top position (closes when the sensor weight is at the top) internal connection heating Supply voltage Current output 0/-0mA fl oating active Start of measurement and measurement interruption when fi lling internal connection motor max 0V A 00VA Timing of counting pulse Start Reset max 0V A 00VA Counting pulse max A 0V or V /0-0Hz Observe supply voltage on type plate max 00Ω Connection factory provided Start contact Pulse 0...sec Start +V Pulse 0...sec alternative Measurement interruption in case of fi lling (e.g. contact at the fi lling coupling) Remove factory provided connection at terminal and Counting pulse output version 1cm (0. ) pulse Counting pulse Reset pulse Electrical connection version ATEX 1/D For use in Hazardous Locations (dust explosion), category 1/ D the applicable installation regulations (VDE 01) must be observed. Electronic switch Relay contact external fuse max. 1A Timing of counting pulse Start Reset max 0V 0.A DC or AC Counting pulse External equipotential bonding terminal, connect to equpotential bonding of the plant gi0 page G

6 1 Signal description Terminal connections The following supply lines are required: Power supply x 1.mm² (AWG 1) (max..mm² (AWG 1)) for N, L and PE provide fuse (max. A) Start of measurement x 1,mm² (AWG 1) (max.,mm² (AWG 1)) Measurement interruption in case x 1.mm² (AWG 1) of filling: (max..mm² (AWG 1)) Evaluation counting x 1.mm² (AWG 1) and reset pulse: (max..mm² (AWG 1)) Evaluation current x 1.mm² (AWG 1) signal 0/-0mA: (max..mm² (AWG 1)) Relay output,upper stop position max,mm² (AWG 1) and malfunction Signal description Measurement start: Terminal and via fl oating contact. or Terminal and via V DC voltage (current consumption approx. ma, observe the polarity) Duration of starting signal: 0. to s Measurement Terminals and interruption in case via fl oating opening contact. of filling: When the terminal und are opened, the sensor weight returns to the upper stop position. By connection to the end switch, the fi lling coupling prevents the burying of the sensor weight. Counting pulse: Terminal and The counting pulse communicates the measured value to the connected evaluation device During the downward movement of the sensor weight, this pulse is generated every cm (or 0.ft) (option 1cm). Reset pulse: Terminal and After start of measurement, a reset pulse is given about 0.s later. It resets the connected evaluation device (counter/ PLC,...). Current signal Terminal (+) and (-) output: The current signal is a measure for the level (application adjustable). The current signal is updated, when the sensor weight touches the bulk good and is updated. Upper stop Terminal 1 and 1 position This signal allows the user to determine (Option) whether the measurement has come to its end. In this case the sensor weight is in its upper stop position, terminals 1 and 1 are linked. Malfunction: Terminal 1 and 1 (Option) In case of a recognized failure (or lack of supply voltage) the contact will be opened. Description of the error reports, see page G. The malfunction signal output can prevent a torn-off sensor weight from falling into the material. When the signal "Malfunction" is given, the device must always be checked on site. page G gi0

7 Parameter adjustment not active when malfunction button jumps to next adjustment item 1 Counting pulse Reset pulse Operation/ malfunction Upper stop position DISPLAY RUN button - jumps to measurement display during parameters adjustment - starts measurement - cancels an error code on the display LEDs Buttons RUN button increases the value to be adjusted - button decreases the value to be adjusted Cone height C Air distance A 0% max. move distance M 0% Siloheight H Sensor weight Rope Version Tape PVC 0mm (. ) 0mm (. ) PVC ATEX 1/D 00mm (. ) 00mm (. ) PA 0mm (1. ) mm (. ) PA ATEX 1/D 00mm (. ) 00mm (. ) Folding cover 00mm (1. ) 0mm (.1 ) Folding cover TEX 1/D 0mm (. ) 0mm (. ) Stainless steel 0mm (. ) 0mm (1.1 ) Spider stainless steel 0mm (.0 ) 0mm (1. ) Ensure the sensor weight can move down at least 00mm (. ) The maximum move distance ensures that the weight does not enter for example agitators. Measurement value: 0,00m (0,0 ) 1> max.move distance M: RUN Measurement starts; display shows actual measurement distance 0..0m (0..0ft) (1m (1ft)) * 0..m (0..ft) ** Note: If the maximum move distance M is adjusted lower than the silo height S, the measured value is always more than 0%. > Silo height H: 0..0m (0..0ft) (0m (0ft)) * 0..m (0..0ft) ** When using of the digital pulse output (terminal //, see page G) the parameters silo height H, air distance A and cone height C have no infl uence on the measurement value. > Air distance A: > Cone height C: 0..0m (0..0ft) (0m (0ft)) * 0..m (0..0ft) ** 0..0m (0..0ft) (0m (0ft)) * 0..m (0..0ft) ** Adjustment of the cone height C: C =0 Current signal output referring to material level C >0 Current signal output referring to material volume Store changes? Yes / No* * Factory-provided **Values for tape version gi0 page G

8 1 Parameter adjustment Advanced parameter adjustment (only when necessary) The following parameters can be adjusted when required: Measurement value: 0.00m (O.00") A> Software version B> Current output mode C> Current at error D> Timer E> Running mode F> Manual control RUN -0 ma* 0-0 ma 0- ma 0-0 ma 0 ma* ma 0 ma remains 0.1h...h off normal* short upwards downwards Store all changes? Yes / No* * Factory provided push + and button together for 1sec Measurement starts: Display shows actual moving distance 0% 0% Setting -0 ma 0-0 ma 0- ma 0-0 ma Current output at level 0% 0% ma 0 ma 0 ma 0 ma In case of malfunction the current output returns to the adjusted value. 0 ma 0 ma Timer Automatic start of measurement with timer function. Timing interval between two measurements can be adjusted. The timer will be started: - if the sensor weight is at the upper stop position after a measurement. - after external measurement start terminal // - after linking of the terminals / (measurement interruption when fi lling) Position off causes no automatic measurement start. For automatic measurement at a predetermined time of day, a start unit connected to terminals // is necessary. To avoid needless wear and tear, the unit should not be started more than necessary. Running mode ma 0 ma Adjustment normal The sensor weight returns to the upper stop polition after every mesurement. Adjustment short (Only possible in case of use of the 0/-0mA output). The sensor weight stops one meter above material level after it has touched the material. This reduces the wear and the measurement time. Every 0 measurements the sensor weight moves back to the upper stop position to adjust the measurement value. Then it moves back to the position it was before. ATTENTION running mode short 1. To avoid the burying of the sensor weight during the fi lling of the silo, the function measurement interrupt in case of fi lling (terminals /, see page G) must be used. Before the fi lling starts, the sensor weight must be in the upper stop position.. The sensor weight must not hang in the fl ow of incoming material. Manual control Push + button: The motor moves the sensor weight upwards while the button is pushed. Push - button: The motor moves the sensor weight downwards while the button is pushed. CAUTION: Avoid the sensor weight reaching the outlet position of the silo. page G gi0

9 Safety instructions / Mounting Safety instructions Mounting 1 - Installation, maintenance and commissioning must be carried out only by qualifi ed technical personnel. - For terminal connection of the device, the local regulations or VDE00 (Regulations of German electrotechnical Engineers) must be observed. - Use a fuse for the supply voltage (max. A). - Provide protection for relay contacts and output transistors to protect the device against inductive load surges. - Compare the supply voltage applied with the specifi cations given on the name plate before switching the device on. - Make sure that not more than mm (0.1 ) of the pigtails are bared (danger of contact with live parts). - Make sure that the boots for protecting cable terminations are not longer than mm (0.1 ) (danger of contact with live parts). - Make sure that the screwed cable gland safely seals the cable and that it is tight (danger of water intrusion). - A voltage-disconnecting switch must be provided near the device. - In the case of a defect, the distribution voltage must automatically be cut off by a RCCB protection switch so as to protect the user of the device from indirect contact with dangerous electric tensions. - In the case of non-qualifi ed maintenance or handling, the safety of the device cannot be guaranteed. - Switch off the supply voltage before opening the device. - Before opening the lid ensure, that no dust deposits or clouds are present. The unit is mounted vertically with the fl ange on the silo. Avoid the sensor weight catching on the socket which could damage the rope. The mounting position must be chosen so: - built ups that might fall down so not damage the sensor weight or the rope. Ensure proper distance from silo wall. - fi lling of the silo might cover the sensor weight with material (prevent measuring during fi lling or observe proper distance to infeed). - upward and downward movement of the sensor weight must not be obstructed, even if the weight oscillates; observe proper distance to stanchions and built-in fi ttings The electrical connections are made in accordance with the connection diagram. Make sure, that the cable in the screwed cable gland is sealed tightly. Do up both lids of the housing tightly, to prevent water enterint the housing. When the unit is used outdoors, use of the weather protection cover is recommended to protect the unit against moisture and temperature extremes. There must be at least 00mm (. ) space for the sensor weight to move down in case of a full silo. Observe the lower edge of the sensor weight at "upper stop position" (dimensions see page G). Special safety instructions for the use in hazardous areas (dust explosion) at 1/ D (zone 0/1) see page G1. Commissioning Warning: In the case of non-qualified maintenance or handling, the safety of the device cannot be guaranteed. 1. Connect the unit with supply voltage, evaluation units and starting units (see page G).. Cable conduit fi ttings, which are not used, must be sealed with a closing element.. Compare supply voltage and frequency with the specifi cations on the type plate.. Turn on the supply voltage. The sensor weight will move into the upper steop position automatically.. Adjust the parameters (see pages G and G).. The unit is now ready for use. Measuring can begin. Socket Sensorweight Cornices Distance gi0 page G

10 1 Interface measurement with the rope version Function It is possible to measure solid matter in water (interface measurement) usch as mud, sand, sediment etc using the. This is made possible by using a special weight that can be adjusted to the required weight for the interface. Additionally an adjustment screw on the underside of the housing is for fi ne tuning. Together these two adjustments mean that the can be set to the exact level of the interface. The sensor weight has been specially developed for interface applications and has a number of metal and plastic discs which can be inserted into the core of the weight, so that the weight sits on the interface level. The rope is plastic coated, to prevent corrosion. All parts of the SLS that come into contact with the material are either made of stainless steel or are specially laquered. Adjustment 1. Coarse adjustment After mounting and wiring of the, the instrument, the sensor weight must be lowered into the liquied in manual mode (see page G) The weight must not fl oat. This can be checked mechanically by looking at the pulley arm. If the weight is fl oats when it reaches the liquid, then the pulley arm will move briefl y upwards. The sensor weight then needs to be made heavier by replacing one or more of the plastic discs with stainless steel discs. This is achieved by unscrewing the lid of the sensor weight and swopping the plastic discs with stainless steel discs. It is important that the sensor weight is completely fi lled with discs, otherwise the trapped air could provide too much buoyancy. After the course adjustment, then the fi ne adjustment can be carried out. Mechanical chamber Pulley arm sensor weightt stainless steel and plastic discs. Fine adjustment: The fi ne adjustment is made using the screw adjustment on the underside of the housing. The following adjustments can be made (when looking at the bottom of the housing) Folgende Einstellung kann mit Gehäuseansicht von unten durchgeführt werden: o Screw anti clockwise sensor weight becomes more sensitive ie "lighter" o Screw clockwise sensor weight becomes less sensitive ie "heavier" Lid Fine adjustment screw Cable glands page G gi0

11 Error codes Switch off the supply voltage and ensure, that it can not be switched on again, before repairs are completed Error code Possible reason Performance of the device Solutions Error code Error code Internal pulse sensors are not identifi ed by the software Rope/tape break. Motor blocked or broken. The motor stops. When the pulse sensors can be identifi ed again, the sensor weight moves to the upper stop position. The motor stops. This code is displayed: when error code occurs and minutes have elapsed and the sensor weight has not reached the upper stop position. Connect the internal plug for the pulse sensor. Repair the tape break (see page G/G1). Look for the reason of motor blocking. 1 Error code No pulses come from the return pulley. Return pulley moves too heavily. Motor defect. The motor moves the sensor weight upwards, until it reaches the upper stop position. Repair the stiff movement of the return pulley. Change motor. Error code Sensor weight buried or jammed. The motor moves seconds upwards, then it waits for seconds. After that the motor moves shortly downwards and then upwards again. If the sensor weight is still jammed, this cycle repeats times. After that the delay time will be increased to one hour. Release the sensor weight. Check that the sensor weight can move freely. Error code Supply voltage too low. Adjust to correct supply voltage. Error code Sensor weight blocked in "upper stop position" or distance sensor weight < 00mm (. ) The unit tries to start times. If the sensor weight is not able to be release, the error code is displayed. (The signal output indicates no error.) Release sensor weight. Increase the min. moving distance to > 00mm (. ) Error code Service interval See chapter "service interval" page G By pushing the RUN button an error code shown on the display can be canceled. (not acive when malfunction) Counting pule LEDs Reset pulse Operation/ malfunction Upper stop position Fuse F1.A Internal plug for pulse sensors DISPLAY Control of the measurement The device compares the distance of downwards movement of the sensor weight (until it reaches the surface of the bulk good) with the distance of upwards movement, until it reaches the upper stop position. When the values are different, this is an indication of a buried or jammed sensor weight. Furthermore, the pulses generated by the return pulley during the measurement are monitored. When there are missing or too irregular pulses this indicates that the return pulley moves too heavily or that the motor is blocked. Returnpulley Upper stop position" Sensor weight gi0 page G

12 1 Maintenance / Service interval Maintenance The UWT- LOT measuring device features a high degree of functional reliability and it requires virtually no maintenance during normal operation. However, it is recommended that the following checks arer regularly carried out. Open the rope-/tape chamber lid. Remove any excess material in the rope-/tape chamber. Check the rope-/tape for wear and tear. Do up the rope-/tape chamber lid tightly. If the rope-/tape is worn or torn, it must be changed (possibly shortened). Available spare parts are: - loose rope - rope-/tape roller (with 0m (.ft) rope or m (.ft) tape) - mounting set for sensor weight - sensor weights Rope/tape chamber Rope/tape roller Rope/ tape Sensor weight Service interval (Error code ) Error code is created automatically after the following number of measurements. Rope version: Tape version: To further guarantee faultless performance, it is strongly recommended to change the rope/tape (see pages G or G1). Rope/Tape durability Number of measurements Rope version approx Tape version approx These values refer to lifetime tests without material infl uence. The sensor weight meets an incline surface, so that an oscillating movement of the sensor weight is caused. Based on these values, the following graph has been produced. When the message appears, the following will occur: - The malfunction relay (terminal 1/1) indicates error. - The message Error appears on the display. Following situation stays, until the message is cancelled with the RUN -button: - Measurements can be resumed. - The malfunction relay (terminal 1/1) still indicates error. - The internal timer does not work. - The message Error remains on the display. - The internal counter, which counts the number of measurements, does not work. When the message is canceled with the RUN -button, the next message will appear after another (0 000) measurements. Operating time in years Rope version Tape version Measurements per day page G gi0

13 Rope change NOTE: Only the manufacturer is allowed to repair devices with ATEX-approval for use in Hazardous Locations (dust explosion) cat. 1/ D (zone 0/1). Switch off power supply, ensure that power cannot be accidentally restored/switched back on. Remove the device from the silo. Open the lid to the rope chamber. Remove the rope roller ( screws). Wind up a new rope or mount a new cable roller (observe the direction of winding), leave about 1. m (.0 ) of rope unwound. Mount the sensor weight in accordance with the drawing. Rope chamber Rope roller 1 Feed sensor weight into the socket, mount the device on the silo again. Check the feeding of the rope inside the rope chamber. Do up the rope chamber lid tightly. Switch on power supply. The sensor weight moves automatically at the upper stop position. The device is now ready for use. Measuring can begin. Rope Sensor weight A new software adjustment is not necessary. Rope Sensor weight Hose shrink Tubing Knot the rope tight Lighter or hot air gi0 page G 1

14 1 Tape change NOTE: Only the manufacturer is allowed to repair devices with ATEX-approval for use in hazardous locations (dust explosion) cat. 1/ D (zone 0/1). Take care when working with the tape. Danger of injury caused by sharp edges. Tape chamber Tape roller Do not kink the tape. Switch off power supply, ensure that power cannot be accidentally restored/ switched back on. Tape feeding bolts Remove the device from the silo. Open the lid to the tape chamber. Remove the tape roller ( screws). Mount a new tape roller (observe the direction of winding), leave about 1. m (.0 ) of tape unwound. Ensure that the tape feeds inside the tape feeding bolts. Remove tape cleaner (including sealing), to feed the tape through the socket pipe. Mount the sensor weight in accordance with the drawing. Feed sensor weight into the socket, mount the device on the silo again. Check the feeding of the tape inside the tape chamber. Do up the lid to the tape chamber tightly. Switch on power supply. The sensor weight moves automatically in the upper stop position. Tape Socket pipe Tape cleaner withspring: mounted with screws Sealing Rubber nozzle Cone Screw, nut Spring The tape cleaner must be able to move upwards against the pressure spring The device is now ready for use. Measurements can begin. A new software adjustment is not necessary. tubes tape fi xing parts screws Sensor weight page G 1 gi0

15 Remarks: ATEX Remarks for use in hazardous locations (dust explosions) according to ATEX 1 Zone classifi cation The approval according to ATEX (directive //EC) for the Hazardous Locations (dust explosion) category 1/ D (zone 0/1) determines the following classifi cation: Device category acc. to //EG Useable in zone 1 D 0, 1, D 1, D*) *) when conductive dust, additional requirements. Container wall Zone (Category ) Zone 1 (Category ) Zone 0 (Category 1) outside container inside container General notes Marking Devices with EX approval are marked on the type plate. Process pressure for ATEX Process and ambient temperature The device construction allows process over-pressure up to 0. bar (.psi) (see type plate). These pressures are allowed for test purposes. The defi nition of the ATEX is only valid for a containerover-pressure of between bar ( psi). Outside of these pressures the approval is not valid. The permitted temperature ranges are marked on the type plate. gi0 page G 1

16 1 Remarks: ATEX Maximum surface temperature The following information shows the maximum surface temperature at the warmest part of the unit which could occure dureing failure (according to ATEX defi nition). The data is valid, if it can be guaranteed during installation, that the area shown with the dotted line, has a maximum temperature of 0 C at normal use. Max. Surface Temperature Ambient Temperature in Zone 1 Processtemperature in Zone 0 0 C (1 F) 0 C ( F) 0 C (10 F) 0 C ( F) 0 C ( F) 0 C (1 F) 1 C (0 F) 0 C (10 F) 0 C (1 F) 1 C (0 F) 0 C (1 F) 1 C (0 F) 0 C ( F) 1 C (0 F) 1 C (0 F) 0 C ( F) 0 C ( F) 10 C ( F) 10 C ( F) 10 C ( F) 10 C ( F) C (0 F) C (0 F) 10 C (0 F) 10 C (0 F) 10 C ( F) 10 C ( F) 10 C ( F) 10 C ( F) 10 C ( F) 10 C ( F) 00 C ( F) 00 C ( F) C ( F) C ( F) 0 C ( F) 0 C ( F) Container wall max. 0 C (1 F) Zone 1 Zone 0 Safety instruction for Hazardous Locations For devices used in Hazardous Locations (dust explosion) zone 0/1 the relevant installation regulations must be observed. The requirements of the EN (e. g. regarding dust deposits and temperatures) must be observed WARNING: When using a metal sensor weight or when using a plastic sensor weight, which is not mounted by an additional plastic rope on the metallic rope/tape (and therefore does not have a safe isolation distance between bulk material surface and grounded rope/tape): It must be ensured, that no static discharge can occur when the sensor weight touches the surface of the bulk material. If this can not be safely ensured, the safe use of the unit is NOT possible. The responsibility for this lies with the users. In case of inclarity an assessment from a notifi ed body is necessary. An alternative version with a plastic sensor weight and additional plastic rope can be chosen. When using a conduit system (with NPT thread) instead of a cable gland, the regulations of the country where the unit is installed, must be observed. The conduit must have a tapered thread either NPT 1/ or NPT / in accordance with the unit and ANSI B Unused inlets must be sealed with a metal closing element. A strain relief must be provided for the connection cables. Use only with closed lid. Switch off the supply voltage before opening the device. Before opening the lid, ensure that no dust deposits or clouds are present. Only the manufacturer is allowed to repair devices with ATEX-approval. page G 1 gi0