DFE TrueView 1100 Gebrauchsanweisung - Seite 10

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CALIBRATION (continued)

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

Figure 9 - ZERO TENSION SCREEN

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

Figure 10 - ZERO OPERATION COMPLETE

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

Figure 11 - WEB PATH FOR CALIBRATION

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

Figure 12 - CAL NOT READY

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.