6
CALIBRATION (continued)
2. Zeroing the Indicator
The first step of any calibration is Zeroing out
the amplifier. Per the Zero Tension screen
(Fig. 9), check the transducer roll to make
sure that nothing is hanging from, resting on,
or leaning against it, including the calibration
rope or cord. Press OK when the roll is
unloaded and ready to zero, or BACK to
return to the prior screen.
After pressing OK, the 1100TV zeros out the
roll weight and a progress bar moves across
the screen, after which the message “Zero
operation complete" comes up in green
characters, as shown on the Zero successful
screen (Fig. 10). Press OK to accept or Re-
Zero if anything occurred which made the
zero-operation suspect.
3. Calibration Procedure
At the center of the web path (located with
a tape measure), secure one end of the
inelastic cord to a fixed point at least two
rolls beyond the transducer roll, and thread it
around the transducer roll and both adjacent
idler rolls, following the exact same path as
the web which will be measured. See the
Right Way / Wrong Way illustration (Fig. 11)
for guidance. Be sure that the cord does not
wrap around any driven rolls, drag bars or
other obstacles that might affect tension.
Hang the total calibration weight on the
free end of the cord and wait for it to stop
swinging. It is important that the cord wraps
around one idler roll on either side of the
transducer roll, and that the weight hangs
freely, without touching anything. When these
conditions are satisfied, press Continue to
proceed.
Fig. 12 shows the Cal Not Ready
screen where the Calibrate button is gray,
accompanied by an error message in red
characters. This error message appears if the
transducers are not properly wired to the
indicator, if the calibration weight is
insufficient for the application, or if the weight
is not properly loading the transducer roll.
Figure 9 - ZERO TENSION SCREEN
Figure 10 - ZERO OPERATION COMPLETE
Figure 11 - WEB PATH FOR CALIBRATION
Figure 12 - CAL NOT READY
