MX615 Series Gas Micro Differential Pressure Transmitter MXIBEEI HVAC Automatic Control
Differential Pressure Transmitter, Gas Micro Differential Pressure, RS485, MXS, DWYER

Product Features
· Linear pressure characteristics and optional pressure measurement ranges
· Operating voltage: AC: 12-24V, DC: 15-30V
· Signal output: 4-20mA/0-5V/0-10V/RS-485 type, zero point adjustment
· Simple and quick installation thanks to the integrated bracket inside the housing
· Calibrated and temperature compensated measurement signals
· Duct connection accessories are not included in the delivery

Applications
The differential pressure transmitter measures the pressure difference of air and non-corrosive gases
Application Fields
· Measure tiny pressure differences in ventilation equipment and air conditioning ducts
· Check air flow
· Monitor filters and control fans

Manual Zero Calibration
Use this button to calibrate the zero pressure value when the pressure difference between the positive and negative pressure air inlets is zero (the LED light will light up when pressed).

Mechanical Design
The air pressure transmitter consists of the following parts
· Sensor housing fixing bracket, cable entry, removable cover with safety screws
· Silicon piezoresistive components for pressure measurement
· Printed circuit board with wiring terminals and dip switches for selecting measurement ranges ("see commissioning notes")
· Zero adjustment button ("see commissioning notes")

Technical Parameters
Medium: Air and non-corrosive gases
Allowable medium temperature range: -20 to 85℃
Room temperature: 20..25℃, measurement during correct installation (FS = full scale measurement)
Sensing element: Silicon piezoresistive element
Accuracy: Total error <±1%, ±0.5%, ±0.2%FS, temperature drift <±0.1% FS/℃
Measurement range: Refer to "Model Overview"
Maintenance: Long-term stability
Weight: 153.1g

Electrical Characteristics
Power supply: Safety extra low voltage
Voltage: AC: 12-24V, DC: 15-30V
Power consumption: <1.5VA
Output current: 4-20mA/0-5V/0-10V/RS-485
Load: ≤250Ω
Input: Non-electrical isolation, non-polar two-wire connection, rectifier bridge for reverse connection protection

Electrical Connection
Screw terminals: Max 1.5m㎡ cable
Cable: Cable gland (no cable deformation protection)
Pressure connection: Pressure nozzle, 6.2mm diameter
Environmental Conditions (Allowable Ambient Temperature)
Operating range: -20-85℃
Storage/Transportation: -40-125℃
Allowable ambient humidity: <90% r.h. (no condensation)

Installation Method
First mark the mounting hole positions on the wall with the back ruler, drill 6mm wall holes with a depth of 30mm and place expansion tubes, then open the buckle of the differential pressure transmitter and flip open the cover.
Fix the self-tapping screws (ST3.5×25) to the designated positions on the wall through the fixing holes of the differential pressure transmitter, connect the incoming and outgoing wires through the waterproof joint, and finally cover the cover.
Note: Please read the instruction manual carefully and operate according to the wiring diagram. Product damage caused by wiring reasons will not be covered by the warranty.