TM 55-4920-402-13&P
(6)
(7)
(8)
(9)
Observe PHAZOR light clock angle.
Press VERIFY TUNE button and hold.
If clock light angle moves, hold VERIFY
TUNE button and adjust RPM TUNE to
return to unpushed clock angle.
Release VERIFY TUNE button. Observe
new unpushed clock angle. Press
VERIFY TUNE button and hold. If
clock light angle moves, hold VERIFY
TUNE button and return to new unpush-
ed clock angle remains the same whether
VERIFY TUNE button is pushed or
released.
PHAZOR light should be between 2:30
and 3:30 when lighted. If not, hold
VERIFY TUNE button and adjust
Balancer RPM TUNE control for 3:00
O’clock. Balancer TUNE meter will in-
dicated between 513 and 567 RPM.
Press PUSH for SCALE 2. IPS meter
will indicated between 3.15 and 3,85 IPS.
NOTE
Balancer unit without the A Suffix will not
operate at this higher RPM. Only amplitude
IPS meter can be checked.
(10) Set RPM RANGE to X10 position and
(11)
RPM TUNE dial to the highest RPM
(1080) reading as shown on Signal
Simulator nameplate.
PHAZOR lights should be at 1:30 and
7:30 clock angle ± 1.0 clock angle. If not,
hold VERIFY TUNE button and adjust
Balancer RPM TUNE control to 1:30 and
7:30 clock angle. Balancer RPM TUNE
meter will indicated between 1026 and
1134 RPM.
(12) IPS meter will indicate between .81 and
.99 IS.
(13) Disconnect Signal Simulator.
b. adjustments. No adjustments can be made. If the
results of the check are not within specifications return
Vibrex to the AVIM or Calibration Repair Center (CRC).
Do not perform performance check 3-8c.
c. Performance Checks of Magnetic and Accelerometer
Pickups, plus Cables.
(1) Connect Strobex to Balancer unit.
(2) Set Strobex Oscillator switch on Model
135 M-10B to ON or set MODE switch to
positions B, C or D on Model 135M-11.
3-8
Change 4
(3) Push Trigger and Strobex should be fir-
ing a steady rate. Strobex tuning dial
should change flash rate. A bright 10”
15” diameter spot of light should
observed on some surface when 10-15
away.
(4) Connect Magnetic pickup cable
Balancer unit with magnetic pickup.
be
ft.
to
(5) Set Balancer
switch to Track and
Strobex Oscillator switch to OFF on the
Model 135M-10B, or place MODE switch
to “A” position on Model 135M-11.
(6) Pass a steel screwdriver blade over face
of magnetic pickup by tapping pole
piece. Each pass should produce a flash
of light from the Strobex when trigger is
pushed.
(7) If failure develops, check magnetic
pickup cable for open or shorted wires in
cable.
(8) Connect accelerometer cable with ac-
celerometer to Balancer A CHANNEL
receptacle.
(9) Position Balancer controls as follows:
(a) FUNCTION to a CHANNEL.
(b) RPM TUNE dial to 500.
(c) RPM RANGE to X1.
(10)
(11)
Tap accelerometer with screw driver han-
dle serveral taps should cause a momen-
tary upscale reading on the IPS meter.
Reading will die out and meter will
return to ZERO.
If failure develops, check accelerometer
cables for open or shorted wires in cable.
d. Adjustments. No adjustments can be made except to
the Strobex (See paragraph 3-10c).
