Microsensor MPM489 User manual

MPM489
Operation Manual

Contents
1 Introduction .................................................................................... 1
2 Specifications ................................................................................. 1
3 Outline Construction and Installation .............................................. 3
4 Electric Connection ........................................................................ 5
5 Unpacking、Components and Storage ......................................... 10
6 Operation、Maintenance and Responsibility................................. 11
7 Responsibility ............................................................................... 12
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
Thanks for your using products from MICROSENSOR. MPM489
Pressure Transmitter is one of precise instruments. We suggest you to
read this manual carefully before use.
1 Introduction
MPM489 pressure transmitter is new pressure transmitter developed by
our company. A pressure sensor with 316L isolated diaphragm is
mounted with the high-performance signal processing circuit in the
stainless steel housing. The Sensor is automatically tested by computer
and compensated zero and temperature in wide range by laser trimming
system. The digital circuit processes the sensor signal into standard
output signal.
The pressure port of MPM489 is male port with waterline seal
construction, electric connection is plug or cable connection. The
compact construction and standard signal output provide you
conveniently and stably.
The product is suitable widely for pressure measurement of petroleum,
chemi-industry, metallurgy, electric power, light industry, cottoncracy,
building material, hydrogeology and other country economic fields.
2 Specifications
Pressure Range: -1bar…0mbar ~ 100mbar…1000bar
Overpressure: ≤2 times FS or 1100bar (Min. value is valid)
Pressure Type:Gauge, Absolute or Sealed

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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:≤±0.3%FS/year
Zero Temperature Drift: ≤0.05%FS/℃ (≤100kPa), ≤0.03%FS/℃(＞
100kPa)
FS Temperature Drift: ≤0.05%FS/℃ (≤100kPa), ≤0.03%FS/℃(＞
100kPa)
Power Supply:11V~28V DC(intrinsic safe version supplied through safe
barrier)，3.3V/5V DC
Signal Output:4mA~20mA DC (2-wire 11V~28V DC Power Supply)
0/1V~5V/10V DC (3-wire 11V~28V DC Power Supply)
0.5V~2.5/4.5VDC (3-wire 3.3V/5V DC Power Supply)
Compensation Temperature Range: 0℃~50℃
Operation Temperature:
-30℃~80℃ (4-pin Plug, M12x1 Plug）
-20℃~70℃（Cable type, cable material: PE, PVC）
-20℃~80℃（Cable type, cable material: PUR）
-30℃~60℃（Intrinsic safety , 4-pin Plug）
-20℃~60℃（Intrinsic safety ,cable）

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-20℃~60℃（Exd）
Storage Temperature:-40℃~120℃,-20℃~85℃（cable type）
Resistance:≤（U-11）/0.02Ω（2-wire）; ≥10kΩ（3-wire）
Pressure Port:M20×1.5 Male with Waterline Seal
Intrinsic safe version mark:ExiaIICT6Ga(only for 2-wire);
ExiaIICT4Ga(ATEX)
EC-Type Examination Certificate Number: Presafe 17 ATEX 11284X
Intrinsically safe coefficient:
Ui=28VDC Ii=93mADC Li=0mH Ci=0.042uF Pi=0.65W
ATEX:
Ui=28VDC Ii=115mADC Li=0mH Ci=0.055uF Pi=0.66W (2-wire)
Ui=26VDC Ii=140mADC Li=0mH Ci=0.055uF Pi=0.66W (3-wire)
Housing Protection: Plug Connection：IP65
Cable Connection：IP65
3 Outline Construction and Installation
Unit:mm
3.1 Construction and Mounting
Dimension see Fig. 1

4
12
SW27
27
SW24
M20×1.5-6g
12
27
(106)
M20×1.5（ G1/2）
(100)
SW27 SW27
M20×1.5-6g
12
M20×1.5-6g
12
（50）
22
27 27
(110)
SW27
27
G1/2
312
(88)
M12×1
7
9
Exd Cable 4-pin Plug M12x1 Plug
Fig. 1
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.
3.2.2 Installation Method
Usually the transmitter should be mounted vertically up to the horizontal
direction. If the condition is unavailable, the allowed max. mount slope
angle from transmitter to the horizontal direction is 30 degree. It is not
recommended to mount the transmitter invertedly.
Take the pressure port M20×1.5 male with water line sealing of MPM489
pressure transmitter as an example, it can be directly installed on the
measuring pipe joint. In order to facilitate the installation and
maintenance, should be install shut-off valve between the connector and
the pipeline (see Figure 2).

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Caution：do not poke the pressure-leading hole with metal wire or
something hard; and do not press the diaphragm with finger or
something sharp to protect the diaphragm.
The recommended method is to see Fig.2.
Pressure Transmitter
Valve
Pipe
Fig. 2
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. 3, and pin definitions are
as follows：
Fig. 3
The electric definitions of cable are as follow：
Pin 2-wire 3-wire
1 +V +V
2 OV/+OUT GND
3 Null +OUT

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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 inf
low, and it must be connected to the atmosphere, to ensure the protecti
on of the product and the accuracy of the output measurement.)
The electric definitions of M12x1 Plug are as follow
Fig. 4
4.2 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” or arrow 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
Pin 2-wire 3-wire
1 +V +V
2 Null GND
3 OV/+OUT +OUT
1 2
34

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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.
Caution: renew the rectangle-ring to the pre-mounting situation in order
tomaintain the protection class when connect plug and socket.
4.3 Ex-proof Transmitter’s Electric Connection
4.3.1 Intrinsic Safe EX transmitter electric connection
a) The installation of intrinsic safe transmitter should comply with
GB3836.15-2000, Part 15 of Electric Equipment Used in Explosive
Gas environment in and Regulations for Electric Installation in
Dangerous Environment (expect coal mine) ;
b) When ex-proof products used in “0” Zone, transformer which
supplies power to safe barrier should comply with Regulations of
GB3836.4-2010;

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c) Intrinsic safe version transmitter is used for explosive gas
environment, please connect transmitter with safe barrier to
establish intrinsic safe ex-proof system;
d) Safe barrier should comply with intrinsic safe ex-proof parameter,
and owning Ex-proof Qualified Certificate;
Safe barrier and power should be put in safe area; intrinsic safe
version transmitter should be put in dangerous area. Please see
Fig.5 and Fig.6:
P
I
Dangerous Area
+V
OV
Safe
Barrier Load
Power
24VDC
+
-
Safe Area
P
Input
Fig. 5
ExiaIICT6Ga [Exia]IIC
Transmitter ex-proof parameter: Safe barrier ex-proof parameter:
Ui=28VDC Ii=93/115mADC(ATEX) Uo=28VDC
Li=0mH Ci=0.042/0.055μF(ATEX) Io=93/115mA DC (ATEX)
Pi=0.65/0.66W(ATEX) Po=0.65/0.66W(ATEX)
ATEX(3-wire):
Dangerous Area Safe Area

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P
U
P
Input
+OUT
+V
GND
Safe
Barrier
2
1
3
Power
24VDC
+
-
Transmitter ex-proof parameter: Safe barrier ex-proof parameter:
Fig. 6
Ui=26VDC Ii=140mADC Uo=26VDC Io=140mADC
Li=0mH Ci=0.055μF Pi=0.66W Po=0.66W
Please pay attention that the max. available distributing capacitance for
connected cable between transmitter and safe barrier is Cp = Co – Ci, the
max. available distributing inductance is Lp= Lo – Li.
Safe barrier could be purchased by user freely. As long as the safe
barrier comply with the above requirement and owns Qualified Certificate,
it can be used with transmitter together.
Please install and operate safe barrier as operation manual indicates.
4.3.2 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

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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
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：
MPM489 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

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temperature -40℃~120℃/-20℃~85℃(cable type)and the relative
humidity≤85%, no corrosive substance in the room.
6 Operation、Maintenance and Responsibility
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.
6.2 Maintenance
MPM489 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 speci
al plug seat, When the installation of electrical connection is comp
leted, be sure to tighten the socket nut and cable fastening nut to
ensure that the transmitter protection level.

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d) Transmitter and external circuit connect through cable, the transm
itter'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 c
an not be blocked or water inflow, and it must be connected to the
atmosphere, to ensure the protection of the product and the accu
racy of the output measurement.Otherwise it will cause damage to
the transmitter.
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