delta-mobrey VM Series Installation, Operation & Maintenance Instructions Manual

Installation, Operation &
Maintenance
VM Series
Models VM2, VM4 (Pressure Switches)
SAFETY INSTRUCTIONS

Information ..points out useful tips,
recommendations and information
for efficient and trouble-free
Operation.
CAUTION! ..indicates a potentially dangerous
situation that can result in light
injuries or damage to equipment or
the environment, if not avoided.
WARNING! ..indicates a potentially dangerous
situation that can result in serious
injury or death, if not avoided.
WARNING! ..identifies hazards caused by
electric power. Should the safety
instructions not be observed, there
is a risk of serious or fatal injury.
WARNING! ..indicates a potentially dangerous
situation that can result in burns,
caused by hot surfaces or liquids, if
not avoided.
WARNING! ..indicates a potentially dangerous
situation in the hazardous area that
can result in serious injury or death,
if not avoided.
Ex applications..special instructions for Ex
applications.
Contents

Foreword

Allowed over range

•

Ambient Temperature

•

Process Temperature

•
Tools To Be Used For Checking And Calibrate The Set Point
•
Operating Principle
Marking
List Of Standards To Which The Product Conforms
Special Conditions Of Use
Installation
Mounting
•
Electrical Connections
•
Wiring
•
End Of Line Resistors
•
Earthing Connections
•
Operation
Adjustments
•
Calibration
•
Periodical Calibration Check
•
Commissioning
Inspection and maintenance
Periodical visual inspection
•
Periodical Functional Verification
•
Replacement Parts
Warranty
Decommissioning
Disposal
Model Code
Instructions
Foreword
The unit is manufactured, checked and supplied in
accordance with our published specification. When
installed and used in normal or prescribed applications,
with the lid in place and within the parameters set for
mechanical and electrical performance, will not cause
danger or hazard to life or limb.
Warning: Units must be selected and installed by
suitably trained
accordance with appropriate codes of practice so
that the possibility of failure resulting in injury or
damage caused by misuse or misapplication is
avoided.
Warning: before
instrument characteristics comply with process and
plant requirements
Warning: The users attention is drawn to the fact
that, when the unit is 'live' with respect to electrical or
pressure supplies, a hazard may exist if the unit is
opened or dismantled
Warning: Where any special conditions of the
product has been required as identified by the last 4
digits of the part number, follow the necessary safety
instructions for a correct installation.
If the equipment is likely to come into contact with
aggressive substances, suitable precautions should be
taken that prevent it from being adversely affected, thus
ensuring that the type of protection is not compromised.
Aggressive substances: e.g. acidic liquids or gases that
may attack
may affect non-metallic materials. Suitable precautions:
e.g. regular checks as part of routine inspections or
establishing from the material's data sheet that it is
resistant to specific chemicals.
Allowed over range
Pressure exceeding the adjustable range can be allowed
up to the max pressure stated on nameplate. The voltage
and current limits for the microswitch must not be
exceeded. (see fig. 2 & 3). Transitory electrical over
ranges can have a destructive effect on the microswitch.
Ambient Temperature
The surface temperature of the instrument is influenced
by the process temperature, electrical working conditions,
installation and environmental. Special attention must be
taken to avoid exceeding the limits specified on the table
below (i.e. remote mounting, valves, siphons, diaphragm
seals. See Mounting).
Process temperature
For the instrument model VM* the following table is
applicable.
www.delta-mobrey.com
IOM-VM-C: JUN 2022
and qualified personnel
installation check
metals or solvents
in
that the
that
Page 1 of 7