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PAD Differential Pressure Transmitter
Brand: KOBOLD Instruments, Inc
The Kobold Differential Pressure Transmitter model PAD is a micro processor-based high performance transmitter, which has flexible pressure calibration and output, automatic compensation of ambient temperature and process variable, configuration of various parameters, communication with HART ® protocol.
The application is very various, as measuring pressure, flow and level by application method. All data of sensor is to be input, modified and stored in EEPROM. As an option the Kobold Pressure Transmitter is also available as a flow meter.
This flowmeter model PAD-F has added the totalizing function in the PAD transmitter.
So it is available to check the flow rate and totalizing flow. It measures the flow rate by using differential pressure without compensation of temperature and static pressure.
The shape of the PAD-F is the same as the standard device and it is only the terminal block which is different since there are two more terminals for the read-out of the pulse output.
Specifications
Accuracy
- ± 0.075 % of Span for Range 3, 4 to 0
- ± 0.25 % of Span for Range 2
Ambient Temperature Range
- -30° to 80° C (-22° to 176° F)
Approvals & Certifications
- ATEX Ex II 2 G Exd IIC T6 T6/T5
Burst Pressure
- psi: 145 to 11,600 (kPa: 1,000 to 80,000, bar: 10 to 800)
Communication
- HART
Current
- Fail High: ≥ 21.2 mA
- Fail Low: ≤ 3.78 mA
Diaphragm Material
- 316L Stainless Steel, 1.4401
- Hastelloy C
- Monel
- Tantalum
Display
- 5-Digit LCD
Drain, Vent Valves & Plug
- 316 Stainless Steel, 1.4401
Electrical Connectors
- M4 Screw Terminal
Enclosure / Body Material
- 316 Stainless Steel - Manifold Valves
- 316L Stainless Steel
- Aluminum
Enclosure Finish
- Epoxy-Polyester Paint
- Polyurethane Paint
Environmental Protection
- Flameproof
- IP67
- Water-Proof
Fill Material
- Inert
- Silicone Oil
Flange Material
- 316L Stainless Steel
Gasket Material
- PTFE
Humidity
- 5 to 100 % Relative Humidity
Load Impedance
- 250 ohms at 17.5 Vdc
- 550 ohms at 24 Vdc
Loop Resistance
- 0 to 1500 ohms - for Operation
- 250 to 550 ohms - HART
Materials of Construction
- 304 Stainless Steel, 1.4301 - Mounting Bracket with U-Bolt, Nameplate
Measuring Span
- 0.75 to 15 Mbar up to 4.137 to 413.70 bar (psi: 0.01 to 0.22 up to 60 to 6000, kPa: 0.075 to 1.5 up to 413.7 to 41370)
Mounting
- Mounting Bracket - for 2-inch Pipe
- U-Bolt
Mounting Position
- Upright
NPT Connection
- 1/2” NPT Female
- 1/4” NPT Female
NPT Inlet
- 1/2” NPT Female - 2-Way Manifold Valve
NPT Outlet
- 1/2” NPT Male - 2-Way Manifold Valve
O-Ring Material
- FPM - Wetted Materials
- NBR - Cover O-Ring
- PTFE - Wetted Materials
Output
- 2-Wire 4-20 mA, Conforms to the HART Protocol
- 30 V - Open Collector
- 500 mA - Max.
Packing Material
- Grafoil
- PTFE
Power Supply
- 12-45 Vdc - Operation
- 17.5-45 Vdc - HART
Pressure Range
- bar: 0 to 750
- kPa: 0 to 75000
- psi: 0 to 10877.8
Pressure Rating
- psig: 3,000 at 232° C (449° F) - Manifold Valves (Direct Mount)
- psig: 6,000 at 38° C (100° F) - Manifold Valves (Remote Mount)
Pressure Type
- Absolute
- Differential
- Gauge
Process Temperature
- -40° to 120° C (-40° to 248° F)
Pulse Range
- 10 milliseconds - Pulse Width
- 100 milliseconds - Pulse Width
- 49 Pulses/second, Max.
- 50 milliseconds - Pulse Width
Stability
- 0.125 % of URL for 3-Years - Long Term
Storage Temperature
- -40° to 85° C (-40° to 185° F)
Temperature Effect
- ± (0.019 % of URL + 0.125 % of Span)/28° C (82° F)
Temperature Range
- -73° to 510° C (-99° to 950° F) - Manifold Valve
Turn-On Time
- 3 seconds
Turndown
- 100:1 - Ranges 4 to 0
- 20:1 - Range 2
- 50: 1 - Range 3
