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extended.  Possible  cable-bound  disturbances  (i.e.  noise)  must  be  blocked  very  near  the  cable  ends 
(evaluation unit) by suitable measures. 

Notice: 

Changes of the measuring system of any kind demand for the explicit approval of Althen Mess- 

& Sensortechnik GmbH. Changes of any kind done without that approval exclude all possible warranty 
and/or liability of Althen Mess- & Sensortechnik GmbH. 

Please  note  that  the  tilt  measuring  system  responds  not  to  inclination  changes  only,  but  as  well  to 
vibrations and to acceleration forces. 



3 Technical Description 

For specifications, version and calibration of the measuring system, please refer to the additional page  
“Device Configuration”. Potential options as well as special versions custom made are noted there. 

This single axis, industrial tilt / inclination measuring system, which consists of one none-contact sensor 
and an electronic customized for said sensor, serves to measure accurate tilt angles in x-axis and it is 
intended for side wall mounting. Depending on the version the tilt angle can be between ± 3 up to ± 60°, 
or between 0 … 10° to 0 … 90°. 

Electrical connections are in 2-wire-technology. 

The  described  amplifier  from  Althen  Mess-  &  Sensortechnik  GmbH  serve  to  measure,  monitor  and 
evaluate inclination related to the horizontal. The montage of the system is to be done with the cable 
pointing  down  and  not  directly  on  a  wall,  but  via  an  adapter,  which  allows  a  fine  adjustment  of  the 
mounting position. Although it’s been mentioned here in this manual, that it is not allowed to open the 
lid of the system: the inside potentiometers must not be touched, i.e. the calibration must not be changed. 

With a supply voltage of 24 VDC a current / signal of 4 … 20 mA is generated. This changing current can 
be read out over a shunt resistor, which can than be processed from the following evaluation unit. 

When exceeding the measuring range, the current may go up over 20 mA, depending on the supply 
voltage and the shunt resistor. 

 

 

Summary of Contents for NM1-2L-420-ATEX

Page 1: ...then DB Innovation Tél 0033 0 4 67 78 61 66 info althensensors fr Sweden Althen Sensors Control AB Tel 46 0 8 7 95 24 90 info althensensors de USA Canada Altheris Inc Sensors Controls Inc Tel 1 858 633 3572 info althensensors com Other Countries please contact us by email at sales althensensors com www althen de V2 1 eng Single Axis Inclination Measuring System NM1 2L 420 ATEX ...

Page 2: ...X Accreditation EU Type Examination Certificate 6 2 Instructions for use of the measuring amplifier 6 3 Technical Description 7 4 Terminal Assignment 8 4 1 Supply Voltage 10 5 Mounting 11 5 1 Starting Up 11 6 Maintenance 12 7 Old appliances disposal 12 Appendix 13 Datasheet 13 Order Designation 13 Housing Dimensions 14 Declaration Of Conformity 15 ...

Page 3: ...3 16 ATEX Inspection Certificate ...

Page 4: ...4 16 ...

Page 5: ... unit must be protected against contact and influence of unauthorised persons In the case of a safety relevant application where a potential malfunction could cause damage to property or persons it is imperative that an additional independent monitor is provided In combination with sensors the maximum loads pressures etc must never be exceeded If you have reasons to assume that safe operation is n...

Page 6: ...l suitable measures must be taken Both function and calibration must be checked regularly The amplifier is contained in an aluminum housing which is equipped with an EMC cover gasket as well as EMC cable glands This ensures IP level 68 1m 1h according to DIN EN 60529 VE 0470 Notice The case amplifier must not be opened Otherwise the gasket will be damaged and the specified protection class tightne...

Page 7: ...stomized for said sensor serves to measure accurate tilt angles in x axis and it is intended for side wall mounting Depending on the version the tilt angle can be between 3 up to 60 or between 0 10 to 0 90 Electrical connections are in 2 wire technology The described amplifier from Althen Mess Sensortechnik GmbH serve to measure monitor and evaluate inclination related to the horizontal The montag...

Page 8: ... IIB T4 Gb 4 Terminal Assignment The electrical connections of the inclination measuring system are made via a cable e g Unitronic FD CP plus 1x2x0 25mm outer sheath polyurethane mix which depending on version of the system may vary in length The maximum of the length is 120 m The cable shield is connected to the systems case The cable has to be laid effectively protected against damages Cable Uni...

Page 9: ...9 16 Version 0 Rxx example shows 0 90 Version 0 Bxx example shows 45 20 mA xx 12 mA xx 2 4 mA 0 20mA xx 4mA xx 12mA 0 ...

Page 10: ...ce can be max 200 Ohms Notice A Zener barrier reduces the max possible load resistance The resistance of the barrier is to be taken into consideration when calculating the overall load resistance Notice Supply and signal current In ignition protection type intrinsically safe Ex ib IIB to connect in a certified safe circuit with the following limits Ui 28 VDC Ci negligible effective inner capacity ...

Page 11: ... m For further information please refer to chapter 3 technical description 5 1 Starting Up After a correct mounting as well as correct electrical connecting a slight adjustment of the zero point may be necessary For that the measurement object must be leveled exactly horizontally and the measuring system must be adjusted to either 4 mA or 12 mA depending on the version The measuring signal can be ...

Page 12: ...isposed of separately Amplifiers and measurement units manufactured and sold by Althen Mess Sensortechnik GmbH serve B2B purposes only Therefore those old appliances must not be given to the communal disposer but must be given back to the seller or disposed of properly If you need any further information please contact your local authorities These measures serve to protect the environment and allo...

Page 13: ... cast Protection class IP68 DIN EN 60529 VDE 0470 checking conditions 1 h 1 m water depth An additional protection against jet water is advised Dimensions W x H x D 115 x 64 x 35 mm not counting the cable glands and grounding screw Weight Ca 800g incl 10m cable Storage temperature range 25 60 C Operating temperature range 25 60 C Notice During operation of the system in an explosion hazardous envi...

Page 14: ...14 16 Housing Dimensions Unterteil base lid ...

Page 15: ...15 16 Declaration Of Conformity ...

Page 16: ...16 16 Subject to modifications All information describe our products in general form ...

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