Ropex RESISTRON RES-401, Руководство по эксплуатации

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Controller functions
Page 22 RES-401 Version 1
An indicating instrument can be connected to this output in order to visualize the temperature of the heatsealing
band.
The characteristics of the ROPEX ATR-3 temperature indicator (size, scaling, dynamic response) are ideally
suited to this application and this instrument should therefore always be used (
 section 10 "Modifications
(MODs)" on page 29).
It not only facilitates SET-ACTUAL comparisons, but also enables other criteria such as the heating rate, set point
reached within the specified time, cooling of the heatsealing band etc. to be evaluated.
This indicator moreover permits disturbances in the control loop (loose connections, contacting or wiring prob-
lems) as well as any line disturbances to be observed extremely effectively and interpreted accordingly. The same
applies if mutual interference occurs between several neighboring control loops.
This output is not potential-free and might have the potential of the secondary voltage of the
impulse transformer.
External grounding is not allowed. If this warning is ignored, the controller will be damaged by frame
currents.
For the terminals of the external temperature meter touch voltage protection must be installed.
If an alarm is signaled, the voltage at the analog output at terminals 14+15 changes between 0VDC and
10VDC with 1Hz.
6.4 Automatic zero calibration (AUTOCAL)
Because of the automatic zero calibration (AUTOCAL) function, there is no need to adjust the zero point manually
on the controller. This function matches the controller to the resistance of the system and calibrates it to a value
of 20°C.
You should always wait for the heatsealing band and the bar to cool down (to ambient temperature)
before activating the AUTOCAL function.
The AUTOCAL function is activated by pressing the AUTOCAL button on the controller.
The automatic calibration process takes about 10…15 seconds. The heatsealing band is not heated during this
process.
The yellow LED on the front panel lights up when the AUTOCAL function is active (up to September 2005: Twin-
color LED blinks red/green alternately). The actual value output (terminals 14+15) is 0…3°C (corresponds to app.
0 VDC) during this process.
If the temperature of the heatsealing band varies on controllers manufactured as of October 2005, the "AUTOCAL"
function is executed a maximum of three times. If the function still cannot be terminated successfully, an error
message appears (
 section 6.8 "Error messages" on page 25).
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