STANDARD BULBS & ADAPTERS
SPECIAL APPLICATION SWICHGAGEÒ . ABS, ESR
ALARM BEFORE SHUT-DOWN
TWO SWITCH OPTION
ABS: SWICHGAGEÒ with Alarm Before Shut-down
The ABS has a standard, front limit contact for high
temperature equipment shut-down and an internal SPDT
micro switch for Alarm Before Shut-Down (see Wiring
Diagram). When the high side (preset high temperature point)
of the micro switch SETS, the NO terminal completes a circuit
to activate an alarm. A decrease in temperature of
approximately 10% of scale is necessary before the switch will
RESET and open the circuit; a continued increase will
complete the shut-down circuit.
NOTE: The front contact shut-down limit
setting (adjustable) and micro switch
high point are preset at the factory; if
settings
other
than
standard
are
necessary, then specify when ordering.
MICRO-SWITCH" LIMIT CONTROL
ESR: SWICHGAGEÒ WITH High Limit Micro-Switch
The ESR is an accurate temperature gauge with a 3-wire,
SPOT Micro-Switch, for high limit alarm and/or shut-down of
equipment.
The Switch will SET (see wiring diagram, NO closes) on rising
temperature;
it
will
RESET
as
temperature
falls
to
approximately 10% of scale below the SET point. By knowing
the high SET point, the ESR can be used to make or break a
circuit.
EXAMPLE: When temp. rises on the 250°F model to the SET
limit, a fan could be turned-on; when the temp. falls,
approximately 25°F, to the RESET point the fan would turn-off.
NOTE: Specify high limit when ordering.
TROUBLE SHOOTING TIPS (Where problem appears to involve Murphy products)
PROBLEM
PROBABLE CAUSE & POSSIBLE CORRECTION
Engine will not start
Blown fuse in magnetic switch circuit: replace with 14 A fuse.
False ground in control circuit: repair.
Open circuit (Fault Sensitive): repair.
Control circuit overloaded by accessories: reroute accessories.
False Shut-down
Intermittent shorting in wiring due to wear or insulation breakdown
check all wiring, replace as necessary.
Fault Sensitive circuit has intermittent open or short: check all
wiring, replace as needed
Vibration causes the magnetic switch to trip: repair, replace or
relocate switch as needed
SWICHGAGE closes but does not trip
Incomplete circuit: locate open circuit and repair.
the magnetic switch or kill the engine.
Magneto not providing power to primary terminal post: repair magneto.
C.D. type magnetic switch being used withmagneto or battery:
replace with correct switch.
SWICHGAGE closes and kills engine.
Defective magnetic switch binds outside, prevents trip: adjust or
but does not trip the magnetic switch
replace the switch.
Conventional magnetic switch is used with C.D. ignition: replace
with a C.D. designated switch.
TATTLETALE tripped but engine
Lost ground to kill engine: repair.
still running (mag. or C.D.).
Pointer will not operate properly,
Bulb not inserted to full length or low coolant level.
inaccurate readings.
Kinked/crimped/broken capillary.
Pointer or contact burned in two
Without exception this is caused by incorrect wiring or a short
circuit: refer to wiring diagrams and recheck wiring:
replace SWICHGAGEâ .
If you need additional assistance, contact YOUR LOCAL MURPHY DEALER, or a Murphy representative at one of the offices listed on
this form.