Measurement Technology NW
LCI-90 Operator Manual
Page 31
Perform this calibration as follows:
1) Apply known or measured
LO
w Tension to the cable.
2) Move to Item 2 using the
DOWN
key and press
ENT
. Edit the
DISPLAY LO
value to correspond to the applied load. Press
ENT
when complete.
3) Move to Item 5 using the
DOWN
key and press
ENT
. The number shown will
be a real-time measurement of the input signal. It should be near the low end of
its full range for low loading conditions. The message above the keypad now
reads:
PRESS ENT TO GRAB ENT ESC
.
Once the reading has stabilized,
press
ENT
to grab the value, or
ESC
to cancel the reading.
4) Repeat, applying a known or measured
HI
gh Tension to the cable.
5) Move to Item 3 using the
UP
key and press
ENT
. Edit the
DISPLAY HI
number
to correspond to the applied load. Press
ENT
when complete.
6) Move to Item 6 using the
DOWN
key and press
ENT
. The number shown will
be a real-time measurement of the input signal. It should be near the high end of
its full range for high loading conditions. The message above the keypad now
reads:
PRESS ENT TO GRAB ENT ESC
.
Once the reading has stabilized,
press
ENT
to grab the value, or
ESC
to cancel the reading.
7) While not recommended, there may be occasions where it would be helpful to
numerically edit the
INPUT LO
and
INPUT HI
fields. This is possible by
moving to Item 4, and changing it from
LIVE
to
EDIT
. This will allow the
INPUT HI
and
LO
values to be edited like any other menu item.
8) Press the
RUN
key to apply the two-point linear fit to the scale and offset values
and save the results. To abort the calibration and keep the current settings, press
ESC
until you are prompted to lose changes and press
YES
5.4.3 Look-up tables
The menu for selecting a look-up table calibration function,
2.3 TENSION CAL
METHOD 3
, is shown below with some sample user-defined lookup tables. By
selecting Item 2, the Tension input signal can be calibrated using one of up to five
look-up tables. These tables are intended to be installed by factory trained personnel,
based on calibrations made on a test stand.
2.3 TENSION CAL METHOD 3
1
CALIB MODE
LOOK-UP
>
2
USE TABLE NO.
6
3
Winch #1 A-Frame
4
(
Not yet defined
)
5
(
Not yet defined
)
6
Traction Winch No. 4
7
(
Not yet defined
)