Microsensor MPM4841 User manual

MPM4841

Operation Manual

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

Thanks for your using products from MICROSENSOR. MPM4841

Pressure Transmitter is one of precise instruments. We suggest you to

read this manual carefully before use.

1 Introduction

MPM4841 pressure transmitter is new pressure transmitter developed by

our company. A piezo-resistive 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 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:Type A：0bar~0.35bar…200bar

Type B：0bar~250bar…600bar

Overpressure: ≤2 times FS

Pressure Type: Gauge, Absolute or Sealed gauge

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/℃ (≤1bar); ±0.02%FS/℃(＞1bar)

FS Temperature Drift: ±0.05%FS/℃ (≤1bar); ±0.02%FS/℃(＞1bar)

Power Supply: 8V~30VDC (2-wire); 12V~30VDC (3-wire)

Signal Output: 4mA~20mADC (2-wire);

0/1V～5/10VDC (3-wire); 0.5V～4.5VDC (3-wire)

Operation Temperature: -30℃~80℃ (4-pin Plug, M12x1 Plug）

-20℃~70℃（cable material: PE, PVC）

-20℃~80℃ (cable material: PUR)

Storage Temperature: -40℃~120℃ -20℃~ 85℃ (Cable type)

Resistance: ≤(U-11)/0.02(Ω)（2-wire）; ≥10kΩ（3-wire）

Pressure Port: M20×1.5 Male with Waterline Seal

Housing Protection: IP65

Weight: A: ≤200g

B: ≤250g

3 Outline Construction and Installation

Unit:mm

3.1 Construction and Mounting Dimension

B1：

SW19

(50)

(78)

SW27

G1/8

SW19

2 7

S W 2 7

G 1 / 8

( 5 0 )

(105)

B2:

G1/8

17.5

60.5

SW27

G 1 /8

17.5

90.5

B4：

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

MPM4841 pressure transmitter as an example, it can be directly installed

on the measuring pipe joint. In order to facilitate the installation and

G1/8

SW27

M12×1

G1/8

SW27

M12×1

maintenance, should be install shut-off valve between the connector and

the pipeline (see Fig. 2).

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：

Pin 2-wire 3-wire

1 +V +V

2 OV/+OUT GND

3 Null +OUT

Fig. 3

The electric definitions of cable are as follow：

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 infl

ow, and it must be connected to the atmosphere, to ensure the pr

otection of the product and the accuracy of the output measureme

nt.

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

2-wire 3-wire

1 +V +V

2 Null GND

3 OV/+OUT +OUT

1818

33.533.5

10A

250V

bolt on the top of plug with little screwdriver and pull out the plug

from transmitter.

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

connect the wires with terminals on the plug core correctly (the

connection terminals are signed with clear numbers). Please

choose Φ4.9mm 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.

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：

MPM4841 Pressure Transmitter 1

Special Plug 1

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 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.

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