micro-trak MT-2400 LR, Справочное руководство

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NOTE: This is an optional method generally used on
pickups or custom vehicles. It may also be nec es sary on
combines where ac cess to the wheels is lim it ed. This in stal­
la tion requires a spe cial calibration procedure, see page 30.
Determine the best location for the magnets on drive shaft
according to which is the most practical spot to attach sensor
mounting bracket. This position should be no more than 12”
(.30 meters) behind the front U-joint. For best results, mount
“L” bracket to trans mis sion and mount magnets on drive
shaft as close to transmission as pos si ble. This will en sure
prop er align ment if drive train shifts under heavy loading.
Two magnets are required for proper Hall-effect speed
sensor operation. Position them exactly opposite each other
(180 de grees apart). The polarity (north and south poles)
de tect ed by the Hall-effect speed sen sor must alternate as
the shaft is turned. An easy way to make sure you attach the
mag nets with al ter nate polarities is this:
•
Stick the two magnets together. Put an “x” on the top
magnet. Remove that magnet and put an “x” on the
second magnet. When you attach the magnets to the
drive shaft, make sure one “x” is facing toward and one
“x” is facing away from the drive shaft. The mag nets will
be cor rect ly at tached with al ter nate polarities.
• Attach magnets onto drive shaft by wrapping ca ble
tie around shaft and magnets. Position each mag net
so that its longest dimension moves in the di rec tion
of ro ta tion. Pull cable tie tight and trim off excess. An
ad just able, non mag net ic (stain less steel) band clamp
may also be sub sti tut ed.
• Attach sensor bracket to vehicle transmission with bolts,
lockwashers and nuts provided. See Illustration 9. (Use
self-tapping screws on vehicle floor pan if bolts are not
prac ti cal.) Use either the short or long end of the brack et
as a base. (Allow enough room be tween the bracket and
the magnets so that when prop er ly spaced, the tip of
the sensor will extend 1/4” [7mm] or more be yond the
lock ing nut.)
• Turn one locking nut onto threaded sensor and in sert
sensor into large hole selected on mount ing brack et.
Turn on remaining locking nut. Set sensor to proper
distance from magnets (1/4” to 1/2”, or 6mm to 13mm).
When distance is set, tight en nuts to lock sensor in
place.
• Secure sensor cable to frame with cable ties. Place first
tie as close to sensor assembly as possible.
NOTE: If you are using more than two magnets, please
follow the directions on page 11.
Illustration 9
Installation
(cont)
Speed Sensor Installation
(cont)
Optional Speed Sensor Mounting on Drive Shaft
SELF-TAPPING SCREWS
OR BOLTS
VEHICLE FLOOR PAN OR
TRANSMISSION
DRIVE
SHAFT
SENSOR BRACKET
ASSEMBLY
(GREEN BODY)
“X” IN
1/4” (7 MM)
MINIMUM EXTENSION
1/4” TO 1/2”
(6 MM TO 3 MM) SPACING
“X” OUT
MAGNETS POSITIONED 180 DEGREES
APART.
MAGNET WITH LONG DIMENSION
IN DIRECTION OF ROTATION
DRIVE
SHAFT
CABLE TIE (RIBBED SIDE
TOWARDS MAGNET) OR NON-
MAGNETIC HOSE CLAMP.