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INSTRUCTION MANUAL 

NI-205WE 

Rev. 3 12/16

 

ABSOLUTE PRESSURE 

SWITCHES

 

 

All data, statements and recommendations supplied with this manual are based on information believed by us to be reliable. As the conditions of 

effective use are beyond our control, our products are sold under the condition that the user himself evaluates such conditions before following our 
recommendations for the purpose or use foreseen by him. 

 

The present document is the property of 

ALEXANDER WIEGAND SE &Co

 and may not be reproduced in any form, nor used for any pur-pose 

other than that for which it is supplied. 

 

WEATHERPROOF AND INTRINSICALLY SAFE: MODEL APW 

FLAMEPROOF: MODEL APA 

Versions APWH, APWL 

 

Versions APAH, APAL 

A pressure attachment 
B cable entry 

WEIGHT 5,5 kg 
(dimensions in mm) 

A vacuum attachment 
B cable entry 

WEIGHT 6,5 kg  
(dimensions in mm)

 

Versions APW10 

 

Versions APA10 

A pressure attachment 
B cable entry 

WEIGHT 8,2 kg  
(dimensions in mm) 

A vacuum attachment 
B cable entry 

WEIGHT 10 kg 
(dimensions in mm) 

For surface mounting use four screws M6.

 

 
NOTE

: dimensions and weights are not binding unless released on certified drawings. 

CAUTION 

  Before  installing,  using  or  carrying  out  maintenance  on  the  instrument  it  is  necessary  to

  read 

and

  understand 

the 

indications given in the attached Instruction Manual. 

  The instrument must only be installed and maintained by 

qualified personnel

  INSTALLATION IS TO BE CARRIED OUT ONLY AFTER 

CHECKING

 THAT INSTRUMENT 

CHARACTERISTICS

 ARE 

CONSISTENT WITH PROCESS AND PLANT REQUIREMENTS 

  The functional 

features

 of the instrument and its degree of protection are shown on the identification plate fixed to the 

case. 

 
 
 
 
 
SAFETY INSTRUCTIONS FOR USE IN HAZARDOUS ATMOSPHERES. 
 
 
 
RECOMMENDATIONS FOR PRESSURE SWITCH SAFE USE. 
 

RELATED DOCUMENT 

To authentified document with certificate 

N° IECEx PRE 16.0068X 
N° IECEx PRE 16.0074X 

 

Содержание APW SERIES

Страница 1: ...ions in mm Versions APW10 Versions APA10 A pressure attachment B cable entry WEIGHT 8 2 kg dimensions in mm A vacuum attachment B cable entry WEIGHT 10 kg dimensions in mm For surface mounting use fou...

Страница 2: ...otection against heat radiation fluid separators cooling coils heated lockers must be taken Process fluid or its solid particles must not however go inside instrument chambers 2 OPERATING PRINCIPLE Th...

Страница 3: ...1 Weatherproof pressure switches Models APW Remove the blocking device fixed to the side of the instrument case and the adjustment screw access plate fig 59 Remove the cover by rotating it in an anti...

Страница 4: ...brate the set point with an accuracy of 0 16 mbar 1 of the adjustable span Fig 6 Calibration circuit for instrument with adjustable range less than 60 mbar 1 Pressure switch 2 Test gauge 3 Inlet valve...

Страница 5: ...to the applicable standards In case of flameproof instrument see also the Standard IEC 60079 14 If the electrical connection is carried out in a protected tube it shall be made so that condensate is...

Страница 6: ...ere should be no trace of leakage of process fluid outside the instrument In case of flame proof or intrinsic safety instruments inspections of the electrical installation are to be carried out also a...

Страница 7: ...TION PROBABLE CAUSE REMEDY Set point shift Permanent deformation of the sensitive element due to fatigue or non tolerated overranges Variation of the elastic features of the sensitive element due to i...

Страница 8: ...fitting 10 Three piece fitting 11 Curve 12 Blocking joint 13 M6 screws No 4 14 Bracket for 2 pipe 15 Vertical pipe 16 Horizontal pipe Annex 1 Model code 1 MODEL CODE AP For further information see dat...

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