Page 2 of 4 [© AB Micatrone, mi-334gb_181204]
DISPLAY UNIT
MF-PD is fitted with a 4-digit LED display and minus
[-] sign when indicating negative pressure.
Programming of all parameters is done by four keys
on the display circuit board.
PROGRAMMING
MF-PD is programmable and include following para-
meters that can be programmed:
No Description Min Max Preset
P01 Alarm limit [Pa] Min prs Max prs 0000
P02 Time delay [seconds] 000 600 000
P03 Alarm function
off = Off
Hi = High alarm
Lo = Low alarm
off Lo off
P04 Indication of pressure
Pos = Positive ind.
Neg = Negative ind.
Pos Neg Pos
NOTE! For transmitter with zero-crossing range, P04
is NOT accessible.
Keep the PGM key pressed until Pis shown in dis-
play. Use the arrow-keys to select the parameter to
change. Press the PGM key to access the selected
parameter.
P01 & P02:
To change the value of the parameter, press the PGM
key again. The first digit will begin to flash, indicating
that the digit can be changed. Adjust the value of the
digit by pressing the arrow-keys. Confirm each digit
by pressing the PGM key. When the last digit is pro-
grammed and confirmed with the PGM key, all digits
will flash fast and then turn to show the parameter.
P03 & P04:
To change the value of the parameter, press the PGM
key again. The display will begin to flash, indicating
that the value can be changed. Adjust the value by
pressing the arrow-keys. Confirm by pressing the
PGM key. The display will flash fast and then turn to
show the parameter.
Press the ESC key to return to normal indication of
actual pressure.
After 5 minutes, with no key has been used, the pro-
gramming is terminated automatically.
Programming keys
Negative ind.
ALARM
MF-PD include a visual alarm indicated by a flashing
display on alarm state, if this function is activated.
By using an optional plug-in module, a potentialfree
changing relay output can be obtained.
P01, Alarm limit [Pa]
Parameter for the pressure at which the alarm will be
triggered. Low alarm limit is always the lowest pres-
sure compared to the atmospheric pressure.
Example 1:
P01 = 0010 Pa
P02 = 030 s
P03 = Lo
P04 = Pos
Alarm is triggered when the pressure is below 10 Pa
(i.e. 9 Pa) for more than 30 seconds.
Example 2:
P01 = -0025 Pa
P02 = 015 s
P03 = Lo
P04 = Neg
Alarm is triggered when the pressure is below -25 Pa
(i.e. -26 Pa) for more than 15 seconds.
The alarm is reset automatically when alarm condition
no longer exists.
P02, Time delay [seconds]
Parameter for setting the time delay in seconds be-
fore the alarm is triggered.
P03, Alarm function
Parameter to obtain alarm at increasing pressure
(High alarm), decreasing pressure (Low alarm) or no
alarm (Off).
NEGATIVE PRESSURE INDICATION
P04, Indication of pressure
Parameter for selecting positive or negative indication
of the pressure. If the transmitter is always measuring
a negative pressure, a minus sign can illuminate in
the display by programming P04 to Neg.
NOTE! For transmitter with zero-crossing range, P04
is NOT accessible.
