LINK Systems OmniLink 5000 - Manual (Page 74)

April 17, 2000 Man ual Revisio n 1.0
8.6
Section 8.2 Static Calibration with Hydraulic Jacks
a) Check to see that the OmniLink 5000 Tonnage Monitor Module is installed as per the installation
instructions of this manual.
b) Turn on the power to the OmniLink 5000. Observe that the OmniLink 5000 tonnage monitor
module displays zero. If the tonnage displays fail to zero within 40 seconds or an error occurs, check
that the strain gauges are wired correctly into the channel connectors and refer to error conditions
listed in this manual.
c) Before calibration can proceed, verify that all configuration parameters are properly set.
Note that the machine rating must be set correctly before calibration and not changed afterward.
Changing the machine rating number after calibration will result in erroneous tonnage readings.
If error conditions relating to setpoint limits occur, correct the invalid conditions and press the
RESET ERROR softkey.
d) Set the high setpoint for each channel of the installed OmniLink 5000 Tonnage Monitor Module to
about 10% greater than the tonnage expected on each channel when the machine is loaded at rated
tonnage. The expected tonnage for a two channel tonnage monitor at full load is one-half (1/2) the
rated tonnage of the machine. For a four channel module, the expected tonnage for each channel is
one-fourth (1/4) the rated tonnage of the machine.
Example: A machine is rated at 200 tons. The high setpoint limits for each channel should be set to
110 tons (10% over 1/2 of 200 tons) for a two channel tonnage monitor module, or 55 tons (10%
over 1/4 of 200 tons) if a four channel module is installed.
e) Set the low limits for each channel to Zero (0).
f) Set the reverse limits for each channel to -10% of channel rating.
g) Turn on the power to the machine and bypass (see Section 4.2.4) the OmniLink 5000 Tonnage
Monitor Module. Return the slide to the top of stroke position.
h) Turn off machine drive motor, wait for the flywheel to come to a complete stop, and place the jack(s)
to be used in calibration under the machine ram or slide.
If a single jack is used, directly center the jack under the ram or slide.
If multiple jacks are used, the jacks should be placed in a geometrically symmetrical pattern relative
to the center of the ram or slide. On machines with multiple connections to the slide, it is preferable
to use a jack directly under each connection.
Also place any plates or parallels under the jack necessary to reduce the gap between jack and slide
at this time. Plates used to elevate the jack should have greater lateral dimensions than the jack and
should extend beyond the jack on all sides.