Microsensor MPM480 User manual

MPM480
Operation Manual

Contents
1 Introduction .................................................................................... 1
2 Specifications ................................................................................. 3
3 Outline Construction and Installation .............................................. 4
4 Electric Connection ........................................................................ 8
5 Unpacking、Components and Storage ......................................... 14
6 Operation、Maintenance 、Responsibility& Troublesome ............ 15
7 Responsibility ............................................................................... 17
Our company reserves the modification right for this operation manual
due to renovation of production technology and craftwork. If some
information is changed, no more notice will be edited.
Please pay attention to the latest version.
Our company also reserves the right of final explanation for this manual.
Version: V1.0

1
Thank you very much for selecting Micro Sensor’s product, please take
some time to read this operation manual very carefully before using the
product.
1 Introduction
MPM480 piezo-resistive pressure transmitter is designed by our
company, it adopts the advanced pressure transmitter technology, and
combine with our years of experiences on developing pressure
transmitters. Zero and Span output of MPM480 transmitter can be
precisely calibrated, it has compact size with good accuracy and
stability, and easy adjusting.
As for users’ various requirements, MPM480 pressure transmitter is
available with general version, Explosion-proof version and Ship-use
version.
In which, General version of MPM480 transmitter includes the types for
general use, Flush-diaphragm, Sanitary and Anti-corrosive
applications.
General version of MPM480 pressure transmitter has M20×1.5 or G1/2
male pressure port , it is widely applied for various pressure
measurements and process controls in the fields of petroleum,
chemi-industrial, metallurgy, electric power, light-industry, textile mill,
architecture, hydrography etc.
Flush-diaphragm of MPM480 pressure transmitter has M20×1.5 or “G
1/2” male pressure port , it is suitable for measuring the pressure in

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food and medical applications, and possible attaching by the media.
Sanitary MPM480 pressure transmitter has a clamp flange connection
(DN25), it is suitable for pressure measurements in food, beverage,
medicine applications.
Anti-corrosive model MPM480 is made of anti-corrosive materials with
Tantalum isolated diaphragm, Hastelloy C housing and pressure
connection, viton O-ring sealing, thus it has good anticorrosion.
Electrical connection of the transmitters is Plug or Cable connection.
Two-wire MPM480 transmitter with plug connection can have a local
LCD or LED indicator to display current value or pressure value on site.
Explosion-proof version of MPM480 includes Intrinsically safe version
ExiaIICT6 and Flameproof version ExdIICT6, in accordance with
national standard GB3836.1-2010 <<Electrical Apparatus for explosive
gas atmospheres- Part 1:General requirements. >>
Flameproof model in accordance with GB3836.2-2010 <<Electrical
Apparatus for explosive gas atmospheres- Part 2: Flameproof
enclosure “d” >>Regulations, Explosion-proof marked with Exd II
CT6Gb.
Intrinsically safe version in accordance with GB3836.4-2010
<<Electrical apparatus for explosive gas atmospheres -Part 4: Intrinsic
safety “i” >>Regulations, Explosionproof marked with ExiaIICT6Ga.
Ship-use version of MPM480 pressure transmitter in accordance with
the related regulations of CHINA CLASSIFICATION SOCIETY (CCS),

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and certified by CCS Tianjin branch, and achieve a Ship-Use
Certificate.
The product is manufactured in accordance with CMC, permits by
manufacture measurement tools or products in P. R. of China,
2 Specifications
Pressure Range: -1bar…0 ~ 100mbar…1000bar
Overpressure:≤ 2 times FS or 1100bar (minimum value is valid)
Pressure Type: Gauge, Absolute or Sealed
Accuracy: ≤±0.25%FS ≤±0.5%FS ≤±1%FS
Note: The precision of products is related to the range of measurement,
and the precision of products in different range is different.
Long-term Stability: ≤±0.2%FS/year
Zero Temperature Drift: ±0.03%FS/℃ (≤100kPa)
±0.02%FS/℃(＞100kPa)
FS Temperature Drift: ±0.03%FS/℃ (≤100kPa)
±0.02%FS/℃ (＞100kPa)
Power Supply:15V~28VDC (intrinsic safe version supplied through
safe barrier)
Signal Output: 0/1V~5VDC (3-wire) 4mA~20mADC(2-wire)
0mA~10/20mADC (3-wire);
Operation Temperature:-30℃~80℃（4-pin Plug、7-pin Plug）
-20℃~70℃（cable material: PE, PVC）
-20℃~80℃ (cable material: PUR)

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-10℃~60℃(Intrinsic safety)
-20℃～60℃(Exd)
Storage Temperature:-40℃~120℃，-20℃~85℃（cable type）
Resistance:≤（U-15）/0.02Ω（Current output）;
≥10kΩ（Voltage output）
Pressure Port:M20×1.5 Male
or G 1/2” male
or Clamp (DN25) connection
Housing Protection: IP65
Electrical Connection: Special Plug or Cable 1.5m
Other related device: Intrinsically safe version shall be power supply
via a safe barrier.
Note: Please pay attention for transmitter with LCD or LED, power
supply is 20~28VDC.
3 Outline Construction and Installation
3.1 Construction and Mounting Dimension
Unit:mm
3.1.1 Non flame-proof model (Fig.1)：

5
27
SW27
50
22
(112)
12
M20×1.5
26.7
M20×1.5
12
SW27
（113）
27
SW27
M20×1.5
12
(109)
26.7
27
Fig. 1
3.1.2 Flameproof Version (Fig.2)：

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Fig.2
3.2 Installation
3.2.1 Check before Installation
a) The measuring pressure is in the measurement range;
b) The measuring medium is compatible with construction;
c) The measuring medium would not jam the pressure-leading hole.
d) Explosion-proof transmitter must accord with the related regulation
in Part 15 of GB3836.15-2000 Electrical apparatus for explosive
gas atmospheres-Part 15: Electrical installations in hazardous
areas （other than mines）.
3.2.2 Installation Method
Generally, the transmitter shall be installed vertically upwards.
Use MPM480 pressure transmitter with flush diaphragm, the effective
depth of the internal thread should not be less than 15mm. Sanitary
MPM480 pressure transmitter using clamp installation.
Sanitary MPM480 pressure transmitter has a clamp connection.
The transmitter can be directly installed on a flange of the measuring
pipe, in order for easy installation or maintenance, it is recommended
S W 3 0
Φ3 0
M 2 0 X 1 . 5
1 2
111
～

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to install a valve between the flange and the pipe.(see Figure 3).
Pressure Transmitter
Valve
Pipe
Fig. 3
3.3 Attenation
a) Don’t stab the pressure leading hole of the pressure port by any
sharp things, and do not touch the diaphragm by your fingers, it
may damage the sensor.
b) Flush-diaphragm transmitter and Sanitary transmitter always has a
plastic protection cover on the pressure port for avoiding any
possible damage on the diaphragm, please do not take it off until
installing the transmitter.
c) For flush-diaphragm version, do not try to use the sealing way of
twisting any sealing tape around the pressure port male of flush
diaphragm transmitter, it may affect the measuring stability or
damage the transmitter.
d) In case the transmitter is operating under thunder or lightning area,
please install an anti-thunder device in the circuits.

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4 Electric Connection
4.1 The transmitter is connected with the outside circuit
through plug or special cable.
The pin arrangements of socket are to see Fig. 4, and pin definitions
are as follows：
≈
30
1
S
+
3
2
10A
250V
GDM
VDE
lift
27.5 18
18
36
2
30
GSP-U
+
S
16
400
2
3
1
33.5
（50）
19
SW17
Fig. 4
Table 1
Pin 2-wire 3-wire
1 +V +V
2 OV/+OUT GND
3 Null +OUT
The electric definitions of cable are as follow：

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Table 2
Cable 2-wire 3-wire
Red +V +V
Black OV/+OUT GND
White Null +OUT
Note: The tube in the center of the cable can not be blocked or water
inflow, and it must be connected to the atmosphere, to ensure the
protection of the product and the accuracy of the output measurement.
4.2 The transmitter connection shall accord with
above-mentioned definition and in reference to Figure 5,
Figure 6 and Figure 7 for plug or cable connection.
P
I
P/I Transmitter
P
Input 0V/OUT
+V +
U
DC current
+
-
-
R
Load
I
4mA ～ 20mA
Fig.5 2-wire, 4mA～20mADC

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P
I
P/I Transmitter
P
Input +OUT
+V +
U
DC current
+
-
-
R
Load
I
0mA ～ 10/20mA
GND
Fig.6 3-wire, 0mA～10/20mADC
P
I
P/U Transmitter
P
Input +OUT
+V +
U
DC current
+
-
-
U
0/1V ～ 5V
GND
Fig.7 3-wire, 0V/1V～5VDC
4.3 Plug connection Operation Method：
a) If the plug has been connected with transmitter, loose the central
bolt on the top of plug with little screwdriver and pull out the plug
from transmitter.
caution：do not take out the socket on the transmitter to protect it）
b) To disconnect the plug, please take out the central bolt on the top
of plug, then turn the plug to the bottom and insert a little flat
screwdriver into a corner signed “Lift” and give a force. The plug
core will be disconnected with housing.
c) To connect the cable, put the cable through the cable jack and

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connect the wires with terminals on the plug core correctly (the
connection terminals are signed with clear numbers). Please
choose Φ4.5mm~7mm shield cable and connect the cable reliably
to prevent short circuit.
d) Pull the cable slightly and push the plug core into housing (a
rattling sound could be listened), then screw down the cable-fixed
nut.
e) To remove the cable, loose the cable-fixed nut to relax the cable,
and operate as Item2 to disconnect the plug. Take out the cable
from terminals with little screwdriver and pull out the cable from
cable-fixed nut, then renew the connection between plug core,
plug and socket.
Note: renew the rectangle-ring to the pre-mounting situation in order
tomaintain the protection class when connect plug and socket.
4.4 Indicator Operation（Only the header with a transmitter）
4.4.1 Indicator Adjustment
a) Open the front panel of indicator as Fig.8(take LED indicator as
example, LCD indicator is similar).
b) Input 4mA（±0.05%）into indicator, adjust zero potentiometer W2
and show “000”;
c) Then input 20mA（±0.05%）into indicator, adjust FS potentiometer
W1 and show the required value. The adjustment ends.
Note: the indicator is 2-wire, and should be connected serially with

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Fig. 8
4mA～20mADC circuit when operating or adjusting.
4.4.2 The Connection between Indicator and Transmitter
a) The selected indicator could only be connected serially to the plug
connection transmitter with 2-wire, 4mA~20mA DC output.
b) Indicator Installation
1) The indicator electric interface is compatible with plug and
transmitter socket interfaces. Four
jacks could match four pins.
2) Mount the matched rectangle-ring to
the indicator jack side, and then
connect the indicator jacks with
transmitter socket pins.
3) Turn-on the fixed nut on the indicator
pins side and take out the core. A cross bolt could be seen.
Screw down the bolt with cross screwdriver and put in the core.
Then screw down the fixed nut. Caution: take out or put in
slightly lest snap the cable; there is an O-ring on the core, be
sure the O-ring the same as the pre-mounting situation.
4) Mount the rectangle-ring on the plug, and match the plug to
the indicator pins side. Then screw down the central bolt on
the top of the plug. Be sure the rectangle-ring is mounted
suitably and correctly during the operation.
4.5 Ex-proof Transmitter’s Electric Connection

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4.5.1 Intrinsic Safe EX transmitter electric connection
Under explosive gas atmospheres, Intrinsically Safe version
transmitter shall have a safe barrier in its Intrinsically Safe
explosion-proof system. The safe barrier and power supply is under a
safe area, the intrinsically safe transmitter under a risk area, be sure to
be earthed grounding safely.
2-wire 4~20mA supplied through safe barrier output intrinsically safe
system to seesee Fig.9.
P
I
Dangerous Area
+V
OV
Safe
Barrier Load
Power
24VDC
+
-
Safe Area
P
Input
ExiaIICT6 [Exia]IIC
Fig.9
Transmitter ex-proof parameter: Safe barrier ex-proof
parameter:
Ui=28VDC Ii=93mADC Uo=28VDC Io=93mADC
Li=0mH Ci=0.044μF Pi=0.65W Po=0.65W
When the product is using under “zero” area, the power transformer to
the safe barrier shall meet the requirements in Item8.1 of
GB3836.4-2010.
The biggest permitted distributed capacitance for the cable between

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the transmitter and safe barrier connection is Cc=Co-Ci, the biggest
permitted distributed inductance Lc=Lo-Li.
Users can buy a safe barrier by yourself, only need to take care its
specs are as above-mentioned requirements and have an
explosion-proof certificate. The installation of safe barrier is in
accordance with its operating instructions.
4.5.2 Explosion proof explosion-proof transmitter
a) There should be ExdⅡCT6 sign on the transmitter explosion proof
name board; Explosive mixture used at the place should be in
accordance with corresponding level stipulated.
b) Transmitter installation should meet the requirement as below:
1) The cap must be tightened, and there are at least 6 joggles.
Do not damage the thread.
2) The explosion proof’s construction and components of Exd
version’s transmitter are examined seriously before out of
factory, so do not scratch the joint surface, make it rough and
all the explosion proof components can not be provided by
yourself when using them. If they are damaged, please order
them from the factory timely.
3) Please lead the cable to a safety area to divide the cable core
for connection. Do not divide the cable core for connection
midway.
5 Unpacking、Components and Storage

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5.1 Unpacking
a) Be sure the package is completed, and the package should be put
as the sign “UP”.
b) Be sure unpacking carefully, and prevent damaging instruments or
accessories. Pay attention to the housing jacket and rubber
bushing of transmitter cable.
5.2 Enclosed
The transmitter should be enclosed when out of factory：
MPM480 Piezo-resistive Pressure Transmitter 1
Special Plug 1（due to the
order）
Production Manual 1
Production Qualification Certificate 1
5.3 Storage
The transmitter should be stored in dry ventilate room, ambient
temperature -40℃~120℃（-20℃~85℃cable type） and the relative
humidity≤85%, no corrosive substance in the room.
6 Operation、Maintenance 、 Responsibility&
Troublesome
6.1 Operation
The user could operate the transmitter without any adjustment. Be
sure the installation and electric connection are correct.
The transmitter could work at once as soon as the power is supplied.
But the signal output will be more stable after 30 minutes.

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6.2 Maintenance
MPM480 Piezo-resistive pressure transmitter is the compact
measurement device, please pay attention to the following items in the
operation:
a) If the pressure-leading hole is jammed or the diaphragm is dirty,
please clean them with impregnant which is compatible with
transmitter construction material. Do not poke pressure-leading
hole with hard object or brush diaphragm.
b) Other cable in the transmitter is for our company’s adjustments, do
not connect it at will to protect the transmitter.
c) The transmitter and the external circuit connect through the
special plug seat, When the installation of electrical connection is
completed, be sure to tighten the socket nut and cable fastening
nut to ensure that the transmitter protection level.
d) Transmitter and external circuit connect through cable, the
transmitter's cable has a vent pipe, is used to make the gauge
pressure sensor back pressure chamber connect to the
atmosphere. When Installation and use of the transmitter, must
ensure that the tube can not be blocked or water inflow, and it
must be connected to the atmosphere, to ensure the protection
of the product and the accuracy of the output
measurement.Otherwise it will cause damage to the transmitter.

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7 Responsibility
Within one year from the delivery date, we shall repair or replace the
instrument with any quality fault caused by material parts or our
manufacturing technique free of charge. For non-quality malfunction
during user’s operation, we are in charge of repair. But the material
cost and the shuttle transportation fees should be borne by users.