DFE SteadyWeb, Инструкция по эксплуатации

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c) Set the -LIMIT pot.(RT121). It is necessary to set this pot. only if the 0 to -10 volt or the -10 to +10
volt output is to be used.
Set the SW103 switches as shown for the 0 to -10 Volt output. With the tension meter reading 0
and the AUTO mode ON, turn the AUTO set pot. clockwise to turn the output of the controller full
on. Turn the TEN TRIM pot.(RT105) fully clockwise so the output will be maximum.
Measure voltage between test points TP117(+) and TP107. Adjust the -LIMIT pot. for 10 volts.
d) Set the SW103 switches as required for the control voltage desired. For all SteadyWeb controllers
having pneumatic (12P) or high voltage outputs (12V) set the switches as shown for the 0 to +10
volt output.
5.5 4-20mA or 0-20mA TENSION SIGNAL OUTPUT
(See Page 4 for description, Figure 17 for switches)
This current output is proportional to tension, not controller output. Select between 4-20 or 0-20
milliampere range. Used as a tension input to data collection systems, computers or drive systems.
a) The tension meter MUST be correctly calibrated before calibrating this current output.
b) Verify that the 0-10 volt tension output produces 10 volts DC when the tension meter reads full
scale (100%). Measure at terminal strip TB203, terminals 42(-) and 44(+). If not, calibrate the
meter. See Section 4. Use the ZERO A pot. to adjust the tension meter to full scale(100%), or to 0
for the following procedures, as needed. Remove the web from the transducer roll to bring the
tension meter to 0.
c) On the Power Board, connect a digital voltmeter to test points TP212(+) and TP206(-). Close switch
8 on SW201. (This connects a 100 ohm resistor across the current output.)
d) For 4-20mA output range, adjust the 4MA pot. (RT204) so the voltmeter reads 0.4 volts when the
tension meter reads 0. Then adjust the 20MA pot. (RT203) for 2.0 volts when the tension meter
reads 100% (full scale).
e) For 0-20mA output range, adjust the 4MA pot. (RT204) so the voltmeter reads 0.0 volts when the
tension meter reads 0. Then adjust the 20MA pot. (RT203) for 2.0 volts when the tension meter
reads 100% (full scale).
f) Set the tension meter to 0. Check the low end of the current range. The voltage across the test
points should be 0.4 or 0.0 volts as previously set. If not, adjust the 4MA pot. as needed.
g) Open switch 8 on SW201 to enable the current output. Set the tension meter to 0 with the ZERO A
pot.