1579A/579A
Chapter 3: Connectors and Control Elements
25
ZERO
RESET
AUTOZERO
ADRESS
B
01
234
56
A
Figure 8: 1579A/B / 579A/B Gas Inlet Side
Potentiometer ZERO
Use this 25 turn potentiometer to adjust the signal output to zero.
Refer to
Chapter 6, Zero Adjust
.
AUTOZERO
Instead of potentiometer ZERO you can use this push button to zero the signal output.
Refer to
Chapter 6, Zero Adjust
.
RESET Switch
After pressing the RESET key the unit performs a self check cycle and a reset. The same
procedure is done after power on. During the cycle the two color LED, labeled STS, changes its
color a few times between red and green.
Finally the LED changes to green, indicating that self test cycle and reset have been completed
successfully.
Address and Mode switch A/B
This switch selects either analog or Profibus mode. In Profibus mode you can set the address of
the unit, in analog mode the mass flow controller requires an analog setpoint voltage.
Refer to
Chapter 6, Operation (Profibus Units)
, for detailed description.
Status LED STS
The Status LED provides two functions: Indicates the status of the instrument and indicates the
Profibus address, at power on or on request.
The LED STS is explained more detailed in
Chapter 6, Operation (Profibus Units)
.
Содержание 1579A
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