WIKA MAG Instruction Manual

WIKA MAG Instruction Manual

Diaphragm pressure switches

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DIAPHRAGM PRESSURE SWITCHES
WEATHERPROOF AND INTRINSICALLY SAFE: MODEL MW
Versions: MWB-MW-MWH-MWG
A
= pressure attachment
B
= cable entry
For surface mounting use two screws M6
WEIGHT 1,8 kg
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:
 
 
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15
SAFETY INSTRUCTIONS FOR USE IN HAZARDOUS ATMOSPHERES.
RECOMMENDATIONS FOR PRESSURE SWITCH SAFE USE.
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
purpose other than that for which it is supplied.
INSTRUCTION MANUAL
Dimensions in mm
 
 
 
 
 
FLAMEPROOF: MODEL MA
Versions: MAB-MA-MAH-MAG
A
= pressure attachment
B
= cable entry
For surface mounting use four screws M6
WEIGHT 3,2 kg
RELATED DOCUMENT
To authentified document with certificate
N° IECEx PRE 16.0067X
N° IECEx PRE 16.0074X
 
NI-221WE
REV. 5 12/16
Dimensions in mm

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Summarization of Contents

General Notes
Foreword
Introduction to the importance of correct model choice and installation.
Allowed Overrange
Specifies tolerance for pressure exceeding the working range.
Mechanical Vibration
Discusses effects of vibration and recommended installation measures.
Temperature
Addresses instrument temperature limits and necessary precautions.
Set Point Calibration
Preliminary Operations
Steps to prepare for calibration, including removing protective devices.
Calibration Circuit and Operations
Details on setting up the calibration circuit and performing adjustments.
Calibration of Instrument with Sensing Element H and G
Specific calibration procedures for instruments with piston sensing elements.
Adjustment of Dead Band
Procedure for adjusting the dead band on microswitches.
Mounting and Connections
Mounting
Guidance on physical installation positions and considerations.
Instrument with Diaphragm Seals
Considerations for instruments with diaphragm seals and capillary connections.
Pressure Connections
Instructions for installing shut-off valves and process connections.
Instruments with Process Connection Coated with PTFE
Specific instructions for instruments with PTFE-coated process connections.
Electrical Connections
Recommendations for making electrical connections according to standards.
Instrument Plumbing
Weatherproof pressure switches (Model MW)
Plumbing recommendations for weatherproof models.
Flameproof pressure switches (Model MA)
Plumbing recommendations for flameproof models.
Visual Inspection
Instrument with Sensor Type H and G
Inspection procedure for instruments with piston sensing elements.
Instruments with Process Connection Coated with PTFE
Inspection procedure for PTFE-coated connections.
Annex 1 - Model Code
Ignition protection mode
Details on ignition protection modes (Weatherproof, Ex d).
Sensor code
Codes for different sensor types (diaphragm, piston).
Sensor material
Materials used for sensor elements (PTFE, Inconel, Monel).
Process connect. material
Materials for process connection (PTFE, AISI s.s, Monel).
Electric Contacts
Codes for electrical contact types (One, Two).
Type of Electric Contact
Specific contact types (Silver, Gold, adjustable dead band).
Options
Available options like Intrinsic Safety execution.

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