Mid-West Instrument 142 Installation And Operating Instructions

Mid-West
Installation and Operating Instructions - Model 142
Wednesday, October 24, 2018
1. Safety
Before installing verify compatibility to the process
media and temperature in contact with the wetted
parts. Incompatible media and / or operation at
temperature extremes
degradation of materials which could result in
safety risk to personnel.
Verify the selected pressure range (differential
pressure and working pressure) and the switch
ratings are within specification for your application.
Warning! Remaining media may result in a
risk to personnel, environment etc.
Use sufficient
measures when
transporting the product.
1.1
The indicating / non-indicating
Intended use:
differential pressure
monitoring differential pressures in industrial
applications. The manufacturer shall not be liable for
any claims if the product is used in applications
contrary to the intended use.
1.2
Personnel: Personnel installing and putting this
instrumentation into service shall be suitably trained
and qualified in accordance with local codes,
practices and regulations.
®
Instrument
can cause premature
precautionary
removing and
switches are used for
6 5 0 0 d o b r y d r s t e r l i n g h e i g h t s , m i
FOLLOWER
MAGNET
HIGH
DIAPHRAGM
PRODUCT DESCRIPTION
The Model 142 "Delta Meter"® is a differential pressure
instrument available as a switch, gauge, or both. A
flexible elastomer diaphragm and calibrated range spring
are moved by differential pressure. A magnet, coupled
with the diaphragm, transmits motion through the wall
of the pressure housing to a follower magnet attached to
an indicating pointer. The rotation of the follower
magnet causes the pointer to track movement of internal
driver magnet and indicate differential on the dial scale.
When equipped with switches, a contact is made or
broken by the magnetic field of the internal magnet. See
Bulletin ELECIM_142 Series/latest for gauges with
switches.
The diaphragm is totally supported upon reaching full
travel in either direction, providing full over-range
protection to rated working pressure.
INSPECTION
Before installation check the product label on each
instrument against the receiving paperwork and the
intended application for correct part number, materials
of construction, working pressure, dial range, etc. If
equipped with switches, check electrical rating, type of
enclosure, etc. Inspect for shipping damage and, if
damaged, report it immediately.
NOTE - Before attempting repairs contact your local
Mid-West Representative or our factory. Failure to do
so will void any warranty.
Bulletin No: IM142/18
Supersedes IM142/02
LOW
RANGE
SPRING
4 8 3 1 4
DRIVER
MAGNET