Microsensor MPM489WZ1 Manuale utente

V1.0

MPM489WZ1

Operation Manual

Thank you very much for selecting Micro Sensor’s product, please

carefully read this operation manual before using the product.

1 Introduction

MPM489WZ1 is a Φ19mm diameter fully sealed submersible level

transmitter based on diffused-silicone principle. It consists of a high

stable and reliable piezoresistive pressure sensing element and the

special PCB component as well as the stainless steel housing. Its

integrated construction and standardized signal output greatly facilitate

the operation and automation control at work sites. The special vented

cable being hermetically connected with the transmitter housing allows

the transmitter for long term use in the liquids that are compatible with

the transmitter construction material.

The protection class of MPM489WZ1 Level Transmitter is IP68.

For easier local installation and observation at work site, the connection

box and indicator are available according to customers’ option.

Product measurement tools type approval No. 15F139-61.

2 Features

MPM489WZ1 Level Transmitter has advantages featuring compact size,

light weight and good long-term stability without need of adjustment. It

can be widely used for liquid level measurement and control in fields of

petroleum, chemi-industry, medicine, metallurgy, power station, mining,

urban water supply, drainage and hydrology survey, etc.

3 Specification

Pressure Range: 10m, 20m, 50m, 100m,200mH2O

Overpressure: 1.5 times FS

Accuracy: ±0.5%FS

Stability: Range＞20mH2O，±0.2％FS/year

Range≤20mH2O，20mmH2O

Operation temp.: -10℃~70℃

Storage Temp.: -20℃~85℃

Power Supply: 11V~28V DC

Output Signal: 4mA~20mA DC（two wire）

Load (Ω): ≤ (U-11)/0.02（Ω）

Insulated Resistance: 500VDC，20MΩ

4 Construction Material

Housing: 1Cr18Ni9Ti Cap: Black Nylon

O- ring: Viton Rubber casing: Chloroprene Rubber

Cable: Φ7.5mm PE cable with vented tube Diaphragm: SS 316L

Connection Box: Cast aluminium (ZL102)/ PBT

5 Outline Dimension of transmitter

5.1 The outline dimension is showed as Figure 1:(unit:mm)

Cable length: the maximum length is 300m.

Figure 1

5.2 Connection Box Dimension(see Figure 2).

Connection box ：Please note it in the order if the connection box is

required.

Indicator: Connection box Ye is available with the indicator upon the

customer request.

Mounting hole 2-M6

Depth 10

～1 4 0

Φ7 2

10 3

4 0

Φ8 4

Mounting hole 2-M6

Depth 10

～1 4 0

Φ8 0

Φ8 4

4 0

Connection box Yb Connection box Ye

SW27

108

118

Connection box Yc

Figure2

6 Electrical Connection

6.1 Wiring

6.2 Electrical connection for 4mA~20mA DC output transmitter

6.3 Electrical connection for transmitter with connection box:

Wire Color

Definition

Black

Red

0V/+OUT

There is a terminal connection board inside the transmitter connection

box, and their definition is indicated below.

6.4 Notes

a) There is a plastic tube in the transmitter special cable; the back

pressure cavity of gauge sensor is connected to atmosphere by this

tube. In the process of installation and operation, be sure to keep the

reference tube be well connected with the atmosphere. Mud or sand

should not be jammed into the reference tube. Be sure no water or

other liquid flows into the reference tube and damages the

transmitter.

b) If the product is installed in the thunderstorm area, the

Lightning-proof Protection Device is suggested to protect transmitter.

7 Unpacking, Enclosed Shipment and Storage

7.1 Unpacking

OV/+OUT

red black

Attention:

a) Check and make sure the package in good condition and the box

should be put as the sign “up”.

b) Striking the package violently is forbidden to avoid damages to

instruments or accessory. Please be sure the cable casing and

rubber sheath are well protected.

7.2 Enclosed Shipment

When delivery, the transmitter includes:

MPM489WZ1 Level Transmitter 1

PE Cable(connected with transmitter) the ordered length

Connection Box（connected with cable）comply with the order

Indicator（in connection box Ye）comply with the order

Product Operation Manual 1

Product Quality Certificate 1

7.3 Storage

The transmitter should be stored in dry and ventilated room with ambient

temperature -20℃~85℃，relative humidity no more than 85% and the air

in the room without corrosive gas.

8 Installation

8.1 Inspection before Installation

Notes:

a) Whether the static pressure produced by the liquid at installation

place exceeds the transmitter FS or not.

b) Whether the measuring liquid is compatible with the transmitter

construction material or not.

c) Whether the measuring liquid can jam the holes on the protection

cap or not.

8.2 Installation Methods

The transmitter should be installed vertically down.

In the flowing water, the acted surface should be parallel with the water

flowing direction.

8.2.1 Installation in the Static Water

The installation method in the static water see Figure 3.

To prevent shaking or destroying the transmitter when pumping, the

transmitter should be put away from the liquid resource. Otherwise it

should be installed as Figure 4, protected by steel tube.

The installation method in the deep well see Figure 4.

Steel tube inserted method is usually used. The steel tube cannot be

bent; the inner diameter of steel tube must be more than 30mm. Several

holes should be made at different heights on the tube so as to easily

raising and make water flow smoothly. If necessary, wrap steel wire

around transmitter to prevent breaking the cable by lifting with the steel

wire.

Figure 3 Figure 4

8.2.2 Installation in Flowing Water (e.g. river channel, reservoir area,

etc.)

The water-calming equipment are required.

Method one: Insert a steel tube in the water channel (see Figure 5).

The steel tube wall should be thicker, and several holes should be made

at different heights on the tube to damp waves and clear the water

pressure influence.

Method two: Superficial burying is better in the sand and stone channel

(see Figure 6).

Figure 5 Figure 6

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