All Models - Murphy VS2 Installation Instructions Manual

All Models

WARNING: STOP THE MACHINE AND DISCONNECT ALL
ELECTRICAL POWER BEFORE BEGINNING INSTALLATION.
1. Firmly secure the unit to the equipment using the base foot mount or
C-Clamp if applicable. See C-Clamp Installation page 3.
For oilwell pumpjacks attach the VS2 and VS94 Series to the Sampson
post or walking beam. See Typical Mounting Locations page 5.
2. Make the necessary electrical connections to the vibration switch. See
Internal Switches, page 6 for electrical terminal locations and page 7 for
typical wiring diagrams. DO NOT EXCEED VOLTAGE OR CURRENT
RATINGS OF THE CONTACTS. Follow appropriate electrical
codes/methods when making electrical connections. Be sure that the run of
electrical cable is secured to the machine and is well insulated from
electrical shorting. Use of conduit is recommended.
NOTE: If the electrical cable crosses a pivot point such as at the pivot of
the walking beam, be sure to allow enough slack in the cable so that no
stress is placed on the cable when the beam moves.
If conduit is not used for the entire length of wiring, conduit should be
used from the electrical supply box to a height above ground level that
prevents damage to the exposed cable from the elements, rodents, etc. or
as otherwise required by applicable electrical codes. If conduit is not
attached directly to the VS2 and VS94 Series switch, use a strain relief
bushing and a weatherproof cap on the exposed end of the conduit. A
"drip loop" should be provided in the cable to prevent moisture from
draining down the cable into the conduit should the weathercap fail.
Sensitivity Adjustment
WARNING:
REMOVE ALL POWER BEFORE OPENING
THE ENCLOSURE. IT IS YOUR RESPONSIBILITY TO HAVE A
QUALIFIED PERSON PERFORM ADJUSTMENTS, AND MAKE
SURE IT CONFORMS WITH NEC AND LOCAL CODES. DO
NOT ADJUST SENSITIVITY WHILE THE MACHINE IS RUNNING. STAND
CLEAR OF THE MACHINE AT ALL TIMES WHEN IT IS OPERATING.
All models of the VS2 and VS94 Series cover a wide range of sensitivity.
Each model is adjusted to the specific piece of machinery on which it is
installed. After the switch has been installed in a satisfactory location (see
page 5) the sensitivity adjustment will be increased or decreased so that the
switch does not trip during start-up or under normal operating conditions.
This is typically done as follows:
1. REPLACE ALL COVERS, LIDS, AND
ELECTRICAL ENCLOSURES.
2. Press the reset push button to engage the magnetic latch. To be sure the
magnetic latch has engaged, observe latch
through the window on the VS2 and
VS2C (see DETAIL "A"). On the
VS2EX, VS94 series the reset button
will remain depressed meaning the
magnetic latch has engaged.
3. Start the machine.
4. If the instrument trips on start-up,
INSTALLATION Continued
5. If the instrument does NOT trip on start-
6. Verify that the unit will trip when abnormal shock/vibration exists.
VS94 Time Delay Adjustment
1. Apply power to the time delay circuit. (see
2. Time the length of the delay with a watch. Let time delay expire. After it
3. TURN THE POWER OFF TO RESET THE TIME DELAY CIRCUIT.
NOTE: Allow 30 seconds bleed-time between turning the
power "OFF" and "ON" .
4. Locate the time adjustment pot (DETAIL "C").
5. Repeat the above steps as necessary to
NOTE: An external time delay can be used
with the remote reset feature of the VS2EXR
series to provide a remote reset and override of the trip
operation on start-up. Time delay must automatically disconnect after
equipment start-up.
DETAIL "A"
Reset Push button
Sensitivity
Adjustment
VS-7037N page 4 of 8
allow the machine to stop. Turn the sensitivity adjustment 1/4 turn
clockwise, (adjustment for VS94 and VS2EXRB models is located within
the box, see DETAIL "B").
WARNING:
MAKE THE AREA NON-HAZARDOUS BEFORE
OPENING THE EXPLOSION-PROOF (-EX) ENCLOSURES.
Depress the reset button and restart the machine. Repeat this process until
the unit does not trip on start-up.
up, stop the machine. Turn the sensitivity
adjustment 1/4 turn counter-clockwise.
Repeat the start-up/stop process until the
instrument trips on start-up. Turn the
sensitivity adjustment 1/4 turn clockwise
(less sensitive). Restart the machine to
verify that the instrument will not trip on
start-up.
page 7 for time delay circuit). The time delay function will be initiated.
expires, the override circuit will de-energize the solenoid, allowing the latch
arm to trip. A clicking noise is heard.
WARNING:
REMOVE ALL POWER BEFORE OPENING
ACCESS DOOR. IT IS YOUR RESPONSIBILITY TO HAVE A
QUALIFIED PERSON ADJUST THE UNIT, AND MAKE SURE
IT CONFORMS WITH NEC AND LOCAL CODES.
The time is factory-set at the lowest setting (5
seconds approximately). To increase time,
rotate the 20-turn pot clockwise as needed
(15 seconds per turn approximately).
obtain desired time delay.
DETAIL "B"
Less
Sensitivity
Sensitive adjustment
More Sensitive
DETAIL "C"
Turn to
decrease
Pot
Turn to
increase