Datasheet

Keihästie 7, 40950 Muurame,
Finland
Phone: [phone]
Fax: [phone]
Email: [e-mail]
www.hkinstruments.fi
DIFFERENTIAL PRESSURE
TRANSMITTER
DPT- 3WIRE
Model summary
Each device has 8 jumper selectable measuring ranges. Each device is temperature compensated.
Model: DPT250 - R8 ( -AZ -D -Q -S )
DPT2500 - R8 ( -AZ -D -Q )
DPT7000 - R8 ( -AZ -D -Q )
- R8 for 8 measuring range
- D for display
- Q for square root output (output is flow linear instead of pressure linear)
- AZ for Autozero element
- S with span point calibration
Model 250
Model 2500
Model 7000
0…25 Pa
-100…+100 Pa
0…1000 Pa
0…50 Pa
0…100 Pa
0…1500 Pa
0…100 Pa
0…250 Pa
0…2000 Pa
0…250 Pa
0…500 Pa
0…2500 Pa
-25…+25 Pa
0…1000 Pa
0…3000 Pa
-50…+50 Pa
0…1500 Pa
0…4000 Pa
-100…+100 Pa
0…2000 Pa
0…5000 Pa
-150…+150 Pa
0…2500 Pa
0…7000 Pa
The Differential Pressure Transmitter is delivered individually packed with standard accessories (see accessories).
Accessories
Standard accessories:
- 2 fixing screws
- 2 plastic duct connectors
- 2 m tube  4 / 7 mm
Optional accessories:
* Metallic duct connector
Technical data
Response Time: 0.8 / 4 s selectable by
jumper
Measuring unit: Selectable by jumper (Pa,
kPa, mbar, inchWC, mmWC, psi)
Suitable media: Air and non-aggressive
gases
Measuring element: Piezoresistive
Max pressure: 400 kPa
Accuracy from range: ±1,5% or (±6Pa
<250 Pa) (including: general accuracy,
temperature drift, linearity, hysteresis, long
term stability and repetition error)
Electrical interface:
• Supply voltage: 24 VAC or VDC ± 10%
• Power consumption: < 1.0 W (<1.5W with
Iout 20mA)
Output signal:
0…10 VDC, Load R minimum 1kΩ or
4…20 mA, maximum load 500Ω
Materials:
• Housing: ABS
• Cover: PC
• Pressure connections: ABS
• Duct connectors: ABS
• Tubing: PVC, soft
Connections:
• Electrical connections: 4 screw terminals,
max 1.5 mm
2
• Cable entry: M16
• Pressure connections: Male  5,0 mm and
6,3 mm
Weight: 150 g, with accessories 290 g
Dimensions: 90,0 x 71,5 x 36,0 mm
General ambient condition:
• Temperature range:
- Operation -10…+50°C (-5…+50°C for –AZ
model)
- Storage: -20…+70°C
- Ambient humidity: 0 to 95% RH
Safety:
• Protection standard: IP54
• Conformance: Meets the requirements for CE
marking:
- EMC directive 2004/108/EY
- Rohs Directive 2002/95/EY
Zero-point adjustment
Note! Supply voltage must be connected one
hour before the 0-point adjustment is carried out.
1) Loose both tubes from the pressure inlets +
and –
2) Push zero button until the red led turns ON.
3) Wait until LED turns off and then install tubes
again to the pressure inlets
It is recommended to adjust the zero point every
12 months during normal operation
* If the transmitter is equipped with automatic zero element the
manual push button adjustment is not required.
Optional auto zero element *
Optional auto zero element makes the DPT
transmitter maintenance free for periodical push
button zeroing. Element automatically adjusts the
transmitters zero point from time to time, this
eliminates the zero point long term drift of the
piezoresistive sensing element.
Zero point adjustment is carried out every 10
minutes. During zero point adjustment the output
and display values will freeze to the latest
measured value. The automatic zero point
adjustment takes 4 seconds.