Hyster A1.3-1.5XNT, Service Manual

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Impact Detection
The impact monitor can detect both hard and soft
impacts.
An example of a hard impact is a truck colliding
with a steel column in a warehouse which causes
the truck to stop suddenly. In this case the impact
force is very strong but it occurs during a short
time period.
An example of a soft impact is a truck rolling over
and crushing a wooden pallet. In this case the im-
pact force is much less than experienced with a
hard impact but it lasts for a significantly longer
time period.
Setting Adjustments
Use the 2 and 3 soft keys to move up or down
through the current values for the four settings for
Impact Force and Impact Times. When there is a
box around the setting you want to change, press
the Enter Key, then use the 2 or 3 soft key to step
through the valid values for that setting.
The Soft Impact Force, the setting at the top of the
screen, can be set to a value in the range 0.2 to 2.5
g., in tenths of gravitational force.
The Soft Impact Time, the second setting down
from the top, can be adjusted to require the impact
monitor to see an impact force greater than the Soft
Impact Force for 1 to 12 samples before a soft im-
pact event will be reported.
The Hard Impact Force, the third setting down, can
be set to a value in the range 0.5 to 3.0 g., in tenths
of gravitational force.
The Hard Impact Time, the fourth setting down
from the top, can be adjusted to require the impact
monitor to see an impact force greater than the
Hard Impact Force for 1 or 2 samples before a hard
impact event will be reported.
Initial Adjustment of Soft and Hard Impact
Settings
NOTE:
When adjusting the impact sensor settings,
be sure to:
Adjust the truck to the lowest Soft Impact Force
setting, the Soft Impact Time set to 6, and the high-
est Hard Impact Force Setting. Drive the truck at
the fastest operational speed for the environment.
Apply the brakes to bring the truck to an abrupt
stop. Determine if an impact event has occurred.
Increase either the Soft Impact Force setting until
the vehicle can be abruptly stopped with the service
brake without reporting an impact event. Read and
record the value, from the dash display, that was
triggered a Soft Impact when abruptly stopping the
truck. Change the Soft Impact Force threshold to
the next highest setting.
To adjust the hard threshold, take the soft thresh-
old value and add 0.3 g. Set the Hard Impact Time
to 2.
Monitor truck during all normal operations. If im-
pacts are recorded during normal operations, go to
(Readjustment of Soft and Hard Impact Set-
tings).
Readjustment of Soft and Hard Impact
Settings.
If the majority of impacts recorded during the ini-
tial adjustment period are soft impacts, change the
settings as follows:
• Increase the Soft Impact Time by 1 for large
scale adjustments.
• Increase the Soft Impact Force by 0.1g for
smaller adjustments.
• Increase the Hard Impact Force to the cur-
rent Soft 0.3g.
If the majority of impacts recorded during the ini-
tial adjustment period are hard impacts, change
the settings as follows:
• Increase the Hard Impact Time by 1 sample
for large adjustments.
• Increase the Hard Impact Force by 0.1g for
smaller adjustments.
After making the necessary adjustments, have the
operator again operate the lift truck under normal
conditions to ensure that the adjustments are cor-
rect.
2200 SRM 1336 Truck Setup Menu
105