STRAINSENSE MDM490 Installation And Operation Manual

MDM490 Pressure Transmitter
Installation and Operation Manual
Contents
1 Introduction ................................................................................................................................................ 1
2 Scope of Supply.......................................................................................................................................... 1
3 Unpacking................................... ........................................................................................................ 1
4 Storage............................................................................................................................................... 1
5 Outline Dimensions and Installation .......................................................................................................... 2
6 Electrical Connection.................................................................................................................................. 4
7 Operation........................................................................................................................................... 6
8 Maintenance....................................................................................................................... 6
9 Warranty ................................................................................................................................................... 6
10 Appendix ......................................................................................................................... 6
1. Introduction
At the heart of the MDM490 pressure transmitter is a precision, silicon, Piezoresistive sensing element,
enclosed in a 316L stainless steel housing.
Please read this manual carefully to ensure correct & reliable operation.
2. Scope of Supply
The transmitter is supplied with the following items as standard:
MDM490 Pressure Transmitter
Mating Connector
Operation Manual
Calibration sheet
3. Unpacking
a) Carefully unpack the transmitter, taking care not to damage the transmitter or accessories.
4. Storage
The transmitter should be stored in a dry, well-ventilated room with an ambient temperature of -40℃ to
120℃/-20℃ to 85℃ (depending on the cable type) and a relative humidity of ≤85%. The room should not
contain any corrosive substances.
Version1.0
Registered office : Old Stratford Business Park, Falcon Drive, Old Stratford, Milton Keynes, MK19 6FG, UK
https://www.strainsense.co.uk/ Tel : +44 (0)1908 305960 Email : sales@strainsense.co.uk
MDM490 Pressure Transmitter
Installation and Operation Manual
5.3 Installation method
Typically, the transmitter should be installed in a vertical position, perpendicular to the ground, with the
pressure port oriented horizontally. When connecting, be mindful of the positive "+" and negative "-" marks
on the pressure ports to ensure proper alignment with the actual pressure direction. As an illustration, the
MDM490 pressure transmitter, equipped with a compatible male pressure port, can be directly mounted on
a measuring pipe joint. For ease of installation and maintenance, it is advisable to install a tri-valve between
the connector and the pipeline (See Figure 2). The recommended torque is between 20Nm and 35Nm.
Version1.0
Registered office : Old Stratford Business Park, Falcon Drive, Old Stratford, Milton Keynes, MK19 6FG, UK
https://www.strainsense.co.uk/ Tel : +44 (0)1908 305960 Email : sales@strainsense.co.uk
• Differential
350mBar to 35bar
•
• Stainless steel construction
• 4-20mA or voltage
1
1 (DIN connector only)
1
1
12/12/2023
Fig. 2
12/12/2023
MDM490 Pressure Transmitter
Installation and Operation Manual
5. Outline Dimensions and Installation
5.1 Dimensions (mm)
5.2
DIN Connector
Installation
5.2 Check before Installation:
a) The measuring pressure is within the transmitter's pressure range and does not exceed the line pressure
(200bar).
b) The pressure media is compatible with the sensor's construction material.
c) The pressure media is unlikely to obstruct the pressure port opening.
d) For a balanced positive and negative pressure, we suggest employing a tri-valve to connect to the
transmitter (please see Fig 2). This helps prevent one-sided overpressure, safeguarding the integrity of the
transmitter.
Version1.0
Registered office : Old Stratford Business Park, Falcon Drive, Old Stratford, Milton Keynes, MK19 6FG, UK
https://www.strainsense.co.uk/
1/6
MDM490 Pressure Transmitter
Installation and Operation Manual
6. Electrical Connection
6.1 Pin definition
The transmitter either comes with cable or connectors (DIN) for connecting to a measurement system.
Please refer to Figure 3 for the pin arrangement of DIN connectors
The pin definitions of cable output are as follows:
6.2 DIN Connector Fitting
a) If the DIN connector is already connected to the transmitter, loosen the central screw on the top of the
connector using a small screwdriver and pull the socket away from the
the plug from the transmitter to protect it.)
b) To disconnect the wiring block, remove the central screw on the top of the socket. Then, turn the socket
over and insert a small flat-head screwdriver into a corner marked "Lift" or an arrow and apply force. The
socket wiring block can then be disconnected from the housing.
c) To connect the cable, pass the cable through the cable jack and connect the wires to the terminals on
the plug core correctly. (The connection terminals are marked with clear numbers.) Please use
Ø4.5mm~Ø7mm shielded cable and connect the cable cores securely to prevent short circuits.
d) Gently pull the cable and push the socket wiring block into the housing, then tighten the cable-fixing nut.
e) Securely attach the mating socket to the transmitter.
Caution: Ensure that the rectangular sealing ring is installed / seated correctly to maintain the protection
class when connecting the plug and socket.
Version1.0
Registered office : Old Stratford Business Park, Falcon Drive, Old Stratford, Milton Keynes, MK19 6FG, UK
https://www.strainsense.co.uk/
3/6
Cable out
Fig. 1
Tel : +44 (0)1908 305960 Email : sales@strainsense.co.uk
transmitter. (Caution: Do not remove
Tel : +44 (0)1908 305960 Email : sales@strainsense.co.uk
12/12/2023
2/6
12/12/2023
4/6