Description
The EPDAF sensing element uses a robust long life ceramic fulcrum lever technology with the patented self-calibration system to guarantee the long-term stability and high performance pressure measurement. The sensor element used in the EPDAF is not affected by any condensation, high humidity or contaminants present in the measure environment.
The EPDAF has built-in electronic circuit, which enables digital measurement of pressure value with temperature compensation logic by continuous monitoring of the sampling air. Built-in calibration routine is integrated in the transmitter electronic circuit. It is ideal for measuring air flow in air condition system, staircase pressurization, lift lobby pressurization and measuring of low air flow in clean room, laboratory, operating theater and isolation room application.
- Sensor Technology: Ceramic Fulcrum Lever Technology
- A/D Resolution: 16 bits
- Sensing Range: – 100 pa to 100 pa & -500 pa to 500 pa
- Signal Output: 1 x 4-20 mA, four wires connection for measuring or configurable as PID control output & 1 x relay output for floating controller
- Interchangeability: The transmitter (sensor and electronic) is interchangeable with other same type transmitter
- Mounting: Wall Mounted
- LCD Display: Display Different Pressure (pa or mmH2O) and including set point value
- Communication: 2 wire RS-485
- Protocol: Modbus RTU
- Power Supply: 24 Vdc
Electric connections
Hardware Specifications
| Power Supply: |
24Vdc |
| Power Consumption: |
10 VA |
| Sensor Element Technology: |
Ceramic Fulcrum Lever Technology |
| Sensor Range: |
-100 to 100 pa & -500 to 500 pa |
| A/D Resolution: |
16 bits |
| Accuracy: |
± 1% FS |
| Repeatability: |
± 3% of reading |
| Analogue Output: |
4 to 20 mA |
| Digital Output: |
1 x for adjustable switching thresholds control (Relay SPST N.O. Dry
Contacts / Rating: 30 Vdc,1A) |
| Microprocessor: |
PIC microcontroller |
| Indication / Adjustment: |
LCD Display plus buttons |
| Communication / Baud Rate: |
2 wire RS-485 Modbus RTU / 9600~76.8kbps |
| Surge Protection: |
15KV ESD for serial port |
| Operating Condition: |
0~+50°C / 5-95% RH, not condensing |
| Storage Condition: |
-20~+60°C / 10-90% RH, not condensing |
| Mounting: |
Wall mounted |
| Weight: |
170 g |
Dimensions
| Model |
Range in (Pa) |
Accuracy (Pa) |
Maximum Working Pressure (Pa) |
| EPDAF-01001 |
– 100 to + 100 |
± 1% FS |
-981 to 981 |
| EPDAF-05005 |
– 500 to + 500 |
± 1% FS |
-981 to 981 |
