BRONKHORST®
9.17.061
EL-FLOW
Base
Series Mass Flow Controllers
Page 27
3.7 Micro-switch use for reading/changing control mode
3.7.1 Read control mode
For switching between different functions in use of a digital meter or controller several modes are
available. More information about the available control modes can be found at parameter “Control
mode”.
Pressing the switch 2x briefly with intervals of max. 1 second in normal running/operation mode will
trigger the instrument to “show” its control mode. For indication of the control mode number the green
LED will flash the amount of tens and the red LED the amount of units in the number. The flashes are
called “count-flashes” and have a pattern of 0.5 sec. on, 0.5 sec. off. The control mode numbers can be
found at parameter “control mode”
View current control mode (press switch 2x briefly)
LED’s
Time
Indication
Green
Red
amount of count
flashes (0…2)
off
0 … 2 sec. maximum
tens in control mode number
off
amount of count
flashes (0…9)
0 … 9 sec. maximum
units in control mode number
Value zero will be indicated by a period of 1 sec. off (0.5 sec. off + 0.5 sec. off).
3.7.2 Change control mode:
For switching between different functions in use of a digital meter or controller several modes are
available. More information about the available control modes can be found at parameter “Control
mode”.
Pressing the switch 4x briefly with intervals of max. 1 second in normal running/operation mode will
trigger the instrument to “change” its control mode.
Change current control mode (press switch 4x briefly)
Step
Action
Indication
Time
Handling
1
Set tens of
setpoint / control
mode number
green LED flashes
0.1 sec on
0.1 sec off
Count-flashes
start when switch
is pressed:
0.5 sec on
0.5 sec off
time-out:
60 sec
Press switch and count green flashes
for tens of control mode number.
Release when wanted amount has
been count.
Counts up to max. 2 and then starts
at 0 again. When counting fails, keep
switch pressed and restart counting
for next attempt.
2
Set units of
setpoint / control
mode number
red LED flashes
0.1 sec on
0.1 sec off
Count-flashes
start when switch
is pressed:
0.5 sec on
0.5 sec off
time-out:
60 sec
Press switch and count red flashes
for units of control mode number.
Release when wanted amount has
been count.
Counts up to max. 9 and then starts
at 0 again. When counting failed,
keep switch pressed and restart
counting for next attempt.
Instrument returns to normal running/operation mode.
Changes are valid when they are made within the time-out times.
See parameter ‘Control mode’ for behaviour at power-up of the instrument.
