Micatrone Micaflex PD ver 4 User manual

MF-PD
ver 4
Micaflex PD ver 4
Differential pressure transmitter with
microcontroller and digital indication
[© AB Micatrone, mi-334gb_181204] Page 1 of 4
Installation- & Operation manual
[Doc. id: mi-334gb_181204]
NOTE !
Read through the entire manual before you begin in-
stallation and programming.
APPLICATION
MF-PD is a pressure transmitter designed for measur-
ing of low positive, negative and differential pressure.
MOUNTING
MF-PD is designed for wall mounting but can be fitted
with an optional frame kit, MFM-PANEL, for recessed
mounting in a wall or through a cabinet door.
MF-PD is screwed to the wall using four screws, max
ø 4mm. Location of screw holes are shown on the re-
verse of the enclosure.
PRESSURE CONNECTIONS
Pressure connection can be made with mounting kit
VR-DR or HT-plastic tube 8/6 mm.
• Connect positive pressure to [+] connection.
• Connect negative pressure to [-] connection.
NOTE! Leave unused connections open to the at-
mosphere.
For differential pressure measurement, the highest
pressure is connected to the [+] connection. If the
transmitter has a pressure range with zero-crossing
(i.e -50...50 Pa) the high pressure connection [+] is
connected to the measuring area and the low pressu-
re connection [-] is connected to the reference area.
OUTPUT SIGNAL SELECTION
Volt and mA signal have different wiring terminals.
Verify that the correct output is connected.
ZERO ADJUSTMENT
Switch on the main supply and wait at least 60 sec.
Set the manifold valve in position calibration (if there
is no valve, loosen the pressure tubes from the MF-
PD). Remove the cover to access the Zero-setting
key on the main circuit board. Check that the minia-
ture switch no 2 is in position ”OFF”. Press down the
Zero-setting key, the LED starts flashing. Keep the
key pressed until the LED turns off. Release the key
and the zero-setting is finished.
SETTING OF DAMPING
MF-PD offers a possibility to set different damping
(time constant). At delivery of MF-PD, the damping is
set to 1,5 seconds damping. Setting is adjusted with
the miniature switch no 4 and 5 (the switch is situated
on the bottom left edge of the main circuit board).
HALF MEASURING RANGE
Set the miniature switch no 1 in position ”OFF” for full
measuring range (100%) or in position ”ON” for half
measuring range (50%).
NOTE! The accuracy is always for the full range.
ADJUSTING THE MEASURING RANGE
The measuring range can be adjusted to correct a
measuring deviation. Instruction can be found on our
website, www.micatrone.com.
FORCED OUTPUT SIGNAL
Max output signal (10 Volt and 20 mA) is obtained
when miniature switch no 3 is set to position ”ON”. This
function can be used to check the receiving system.
Miniature switch
Zero-setting key
LED
Programming keys
Adjustment keys
See instructions on our web site.

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.

[© AB Micatrone, mi-334gb_181204] Page 3 of 4
TECHNICAL DATA
Supply voltage: 24 ± 15% VAC, 20...32 VDC
24, 115, 230 VAC (with
transformer) 50/60 Hz
Power
consumption: Max 4 VA (24 VAC) Max 2 W (24 VDC)
Max 8 VA (230 VAC)
Range: -50...+50 (-25...+25) Pa
0...50 (0...25) Pa
0...100 (0...50) Pa
0...200 (0...100) Pa
0...500 (0...250) Pa
0...1 (0...0,5) kPa
0...2 (0...1,0) kPa
0...5 (0...2,5) kPa
Other ranges on request.
Measuring range in brackets
at half the measuring range.
Overload: Max 50 kPa
Accuracy: < ± 0,5 % of the full range plus
± 0,5 Pa
Temperature drift: < ± 0,5 % /10 °C
Damping: Selectable time constants of
0.05, 0.7, 1.5 and 2.2 s.
Output signal: 4...20 mA max RL= 400 Ohm
0...10 Volt Ri= 0 Ohm
Both mA and Volt signal can
be used simultaneously.
0 ... 20 mA can be ordered.
Inverted signal can be ordered.
Ambient temp.: 0...50°C
Degree of protec.: IP 65, ABS plastic
El. connections,
- solid conductor:
- stranded conductor: 1 x 2,5 mm2/ terminal 1 x 1,5 mm2/ terminal
Cable entries: 2 pcs threaded holes M16x1,5
(cable glands not included)
Pressure. conn.: 8/6 mm HT-plastic tube
Dimensions: WxHxD = 122x120x90 mm
Weight: 0.60 kg
EMC/LVD/ROHS II
AB Micatrone declare under sole responsibility that
MF-PD is in conformity with the essential require-
ments in the EMC-, the LVD- and the RoHS II direc-
tive. The full text of Manufacturers declaration of con-
formity is available on Micatrones website.
SERVICE
MF-PD normally needs no service, but we recom-
mend to check the zero point once a year.
CLEANING
MF-PD should be cleaned with a soft cloth and a light
detergent. Do not use scouring powder or solvent.
TRANSFORMER (OPTIONAL)
The output signal is normally not galvanically se-
parated from the supply voltage. To obtain galvanic
separation between the output signal and the supply
voltage on a standard transmitter, the apparatus must
be equipped with a plug-in transformer. Plug-in trans-
former can be obtained for 24, 115 or 230 VAC.
ALARM MODULE (OPTIONAL)
The MF-PD can be fitted with a built-in alarm module.
The alarm module include a potentialfree changing
relay output for max. 48 volt / 5 A. The figure show
the relay output in an unpowered state [NC], i.e.
alarm state.
CONNECTION 24 VAC / 20...32 VDC
(without transformer) CONNECTION 24 / 115 / 230 VAC (with built-in transformer)
CONNECTION ALARM MODULE
(Alarm module and Transformer can’t be
used at the same time.)

AB Micatrone Telephone: [phone]
Aldermansvagen 3
SE-171 48 SOLNA Internet: www.micatrone.com
SWEDEN E-mail: [email protected]
Page 4 of 4 [© AB Micatrone, mi-334gb_181204]
MODBUS RTU (OPTIONAL)
MF-PD can be fitted with a built-in expansion module
for network communication with a computer via RS-
485 serial connection. See separate instruction for
Modbus RTU.
Modbus RTU can NOT be used with Alarm module or
Transformer.