4
PENBERTHY
MODEL MGS-314L SERIES LEVEL CONTROL SWITCH
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
7 DISPOSAL AT END OF USEFUL LIFE
Penberthy Model MGS-314L Series level
control switches are used in a variety of fluid
applications. By following the appropriate
federal and industry regulations, the user
must determine the extent of preparation and
treatment the switch must incur before their
disposal. A Material Safety Data Sheet (MSDS)
may be required before disposal services
accept certain components.
Metal, glass and polymers should be recycled
whenever possible. Refer to order and
relevant technical data sheets for materials of
construction.
8 TELEPHONE ASSISTANCE
If you are having difficulty with your
Model MGS-314L Series level control switch,
notify your local Penberthy distributor or call the
factory direct (956) 430-2500. To help us assist
you more effectively, please have as much of the
following information as possible when you call:
• Instrument model number
• Name of the company from whom you
purchased the switch
• Invoice number and date
• Process material
• Operating process temperature
• Brief description of the problem
• Troubleshooting procedures that failed
5.1 Initial test
Use an ohmmeter to verify the following conditions
6 TROUBLESHOOTING
6.1 Introduction
Your Penberthy magnetic level gauge switch
is designed to give you years of unattended
service. However, failure of electrical equipment
can occur. Sound maintenance practices
require periodic inspection of the instrument to
ensure it is in good working order.
SAFETY INSTRUCTIONS
Do not apply power to the switch while performing
these tests.
6.2 Switch test
With the switch at position 'A' use an ohmmeter
to verify the conditions in Section 5.1. Using a
magnet, move the switch to position 'B'. If the
switch still doesn't change state, it is defective.
Go to Section 8.
TABLE 1 -
Wire conditions at different switch orientations
Model
Switch orientation
Wire color
Black
Red
Blue
MGS-314L Series
Switch at position 'A'
(liquid level below switch)
Common
Open
Closed
Switch at position 'B'
(liquid level above switch)
Common
Closed
Open
If these conditions do not exist, go to Section 6
If attempts to solve your problem fail, you may
be requested to return your instrument to the
factory for intensive testing. You must obtain
a return authorization (R.A.) number from
Emerson prior to returning your unit.
Failure to do so will result in the unit being
returned to you without being tested freight
collect. To obtain a R.A. number gather the
following additional information;
• Reason for return
• Person to contact at your company
• 'Ship-to' address
We recommend that you return the entire unit
for testing. There will be a minimum charge
applied for evaluation of non-warranty units.
You will be contacted before we repair the unit
if there will be any additional charges in excess
of the minimum. If you return a unit that is
covered by the warranty, but is not defective,
the minimum charge will apply.
5 SET-UP
SAFETY INSTRUCTIONS
Do not apply power to the switch while performing these tests.
