HK Instruments DPT2500-R8 Series Instruction manual

DIFFERENTIAL PRESSURE TRANSMITTER
DPT-3wire EIGHT RANGE MODEL
Model summary
Each device has 8 jumper selectable measuring ranges. Each device is individually temperature compensated.
Model DPT2500 - R8 ( -D -AZ )
DPT7000 - R8 ( -D -AZ )
- R8 for 8 measuring range
- D for display
- AZ for autozero element
long term stability typical year
≤ ± Pa with AZ,
≤ ± 8 Pa without AZ; model 2500
≤ ± 24 Pa without AZ; model 7000
Model 2500 Model 7000
- 00…+ 00 Pa 0… 000 Pa
0… 00 Pa 0… 500 Pa
0…250 Pa 0…2000 Pa
0…500 Pa 0…2500 Pa
0… 000 Pa 0…3000 Pa
0… 500 Pa 0…4000 Pa
0…2000 Pa 0…5000 Pa
0…2500 Pa 0…7000 Pa
The Differential Pressure Transmitter is delivered individually packed with standard accessories (see
accessories).

Technical data
Response Time 0.8 / 4 s selectable by push button (see instructions below)
Bursting pressure 30 kPa (model 2500) 80 kPa (Model 7000)
Suitable media Air and non-aggressive gases
Measuring element Piezoresistive
Accuracy from range ± ,5% or (±6Pa <250 Pa)
(including: general accuracy, temperature drift, linearity, hysteresis and repetition error)
Electrical interface Supply voltage 24 VAC or VDC
(3-wire) Max. tolerance ± 0%
Power consumption < .0 W (< .5W with Iout 20mA)
Output signal 0… 0 VDC, Load R minimum kΩ 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 .5 mm
2
Cable entry M 6
Pressure connections Male ∅ 5,0 mm and 6,3 mm
Weight 50 grams, with accessories 290 grams
Dimensions 90,0 x 7 ,5 x 36,0 mm
General ambient condition
Temperature range
Operation - 0…+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 89/336/EEC
Rohs Directive 2002/95/EY
Accessories Standard accessories:
o2 fixing screws
o2 plastic duct connectors
o2 m tube ∅ 4 / 7 mm
Optional accessories:
oMetallic duct connectors

Zero-point adjustment
Note! Supply voltage must be connected one hour before the 0-point adjustment is carried out.
) Loose both tubes from the pressure inlets + and –
2) Push zero button > 4 seconds and 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 2 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 0 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.
Dimensions
Pa
DPT
71.5
95.0
90.0 36.0

Installation
Electrical Connection
0- 0V Output 0… 0 V
4-20mA Output 4…20 mA
24V Supply 24 VAC or VDC
GND Ground
4-20mA
ZERO
0,1/4s
500
1000 24VDC
GND
0-10V
0-10V
4-20mA
24V
GND
VA
24VDC / 24VAC
+
Output 4...20mA
Output 0...10V
Power supply
- 00…+ 00Pa 00Pa
250Pa 500Pa
1000Pa 1500Pa 2000Pa 2500Pa
Jumper 1
Jumper 2
Jumper 3
Jumper 1
Jumper 2
Jumper 3
RESPONSE TIME CHANGE: press the button shortly
ZEROING: press the button over 4 seconds
>4s
<1s
<1s
0,8s selected
4s selected
LED: long blink...
LED: 3 x short blink means
LED 2 x long blink means
Zeroing
Jumper 1
Jumper 2
Jumper 3
LED
000Pa 500Pa
2000Pa 2500Pa
3000Pa 4000Pa 5000Pa 7000Pa
Jumper 1
Jumper 2
Jumper 3
Jumper 1
Jumper 2
Jumper 3