WIKA MAB User Manual
Instruction manual ni-221e, Diaphragm pressure switches
INSTRUCTION MANUAL
NI-221E
Rev. 1 11/02
DIAPHRAGM 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 ETTORE CELLA SPA and may not be reproduced in any form, nor used for
any purpose other than that for which it is supplied.
WEATHERPROOF:SERIES MW
EXPLOSIONPROOF: SERIES MA
Models: MW-MWH
Models: MA-MAH-MAG
A
= pressure attachment
B
= cable entry
A
= pressure attachment
B
= cable entry
WEIGHT 1,8 kg
dimensions in mm WEIGHT 3,2 kg
dimensions in mm
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.
CONTENTS:
1
GENERAL NOTES
2
OPERATING PRINCIPLE
3
IDENTIFICATION PLATE AND MARKINGS
4
SET POINT REGULATION
5
SET POINT CALIBRATION
6
MOUNTING AND CONNECTIONS
7
INSTRUMENT PLUMBING
8
PUTTING INTO OPERATION
9
FUNCTIONAL VERIFICATION
10
TROUBLESHOOTING
11
STOPPING AND DISMOUNTING
12
DEMOLITION
SAFETY INSTRUCTIONS FOR USE IN HAZARDOUS ATMOSPHERES.
RECOMMENDATIONS FOR PRESSURE SWITCH SAFE USE.
RELATED DOCUMENT
To authentified document with certificate
N° CESI 02 ATEX 144