Bronkhorst®
Instruction Manual EL-FLOW® Classic series
9.17.085D
12
3
Basic operation
3.1
General
The following signals are available:
·
input: setpoint
·
output: measured value
The interface type of the instrument (0…5V or 4…20mA) can be found in the
model key
stated on the serial number label.
Input signals:
Setpoints below 2% of the full scale will be interpreted as 0% setpoint.
Output signals:
The 100% point of the measured value is based on the flow rate requested at ordering time. This flow rate can be found on
the serial number label.
3.2
LED indications
•
(green)
Mode: operation mode indication
•
(red)
Error: error/warning messages
The tables below list the different LED indications:
•
Green
Pattern
Time
Indication
on
continuous
Normal operation mode
off
continuous
Power off or program not running
blink
0.2 sec on,
0.2 sec off
Special function mode; the instrument is busy performing a special function (e.g.
auto-zero or self-test)
•
Red
Pattern
Time
Indication
on
continuous
Critical error; the instrument needs servicing before it can be used
•
Green and
•
red (alternating)
Pattern
Time
Indication
fast wink
0.1 sec on,
0.1 sec off
Selected action started (after releasing the multifunctional switch)