HK Instruments DPT-Flow-1000, DPT-Flow-7000, DPT-Flow-5000, DPT-Flow-2000 Installation Instructions And Owner's Manual
Copyright HK Instruments 2014 www.hkinstruments. Installation version 2.0 2014
IN S TA L L ATI ON
INSTRUCTIONS
AIR FLOW AND VELOCITY TRANSMITTERS
DPT-Flow Series
WARNING
• READ THESE INSTRUCTIONS CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
DEVICE.
• Failure to observe safety information and comply with
instructions can result in PERSONAL INJURY, DEATH AND/OR
PROPERTY DAMAGE.
• To avoid electrical shock or damage to equipment, disconnect
power before installing or servicing and use only wiring with
insulation rated for full device operating voltage.
• To avoid potential fire and/or explosion do not use in potentially
flammable or explosive atmospheres.
• Retain these instructions for future reference.
• This product, when installed, will be part of an engineered
system whose specifications and performance characteristics
are not designed or controlled by HK Instruments. Review
applications and national and local codes to assure that the
installation will be functional and safe. Use only experienced
and knowledgeable technicians to install this device.
INTRODUCTION
Thank you for choosing an HK Instruments DPT-Flow series air
flow transmitter. The DPT-Flow series is intended for use in commercial environments. The DPT-Flow measures air flow, velocity
and differential pressure. It is designed to be used in combination
with air flow measurement probes (i.e. FloXact) or with centrifugal
fans that provide differential pressure connections and K-values.
The DPT-Flow series of air flow transmitters is comprised of DPTFlow-1000, DPT-Flow-2000, DPT-Flow-5000 and DPT-Flow-7000
with measurement ranges of 0–1000 Pa, 0–2000 Pa, 0–5000 Pa
and 0–7000 Pa respectively. All models come with display and
manual pushbutton autozero. The DPT-Flow is available with optional autozero calibration.
DPT-Flow series devices are commonly used in HVAC/R systems
for:
• air flow monitoring across centrifugal fans and blowers
• in-duct air flow monitoring
• VAV applications
SPECIFICATIONS
Performance
Accuracy (at applied pressure):
Ranges < 125 Pa = ±2 Pa
Ranges 125 Pa = ±1,5 % Pa
(Accuracy specifications include: general accuracy,
temperature drift, line arit y, hysteresis, long term
stability, and repetition error)
Thermal effects:
Temperature compensated across the full spectrum of
capability
Overpressure:
Proof pres sure: 25 kPa
Zero point calibration:
Automatic autozero or
manual pushbutton
Response time:
1.0−20 s, selectable via menu
Technical Specifications
Media compatibility:
Dry air or non-aggressive gase s
Press ure units (select via menu):
Pa, kPa, mbar, inWC, mmWC
Pressure output scale (select via menu):
Measuring element:
Piezoresistive
Environment:
Operating temperature:
-10...50 °C
with autozero (-AZ) calibration -5...50 °C
Storage temperature:
-20...70 ° C
Humidity:
0 to 95 % rH, non condensing
Physical
Dimensions:
Case: 90.0 x 95.0 x 36.0 mm
Weight:
150 g
Mounting:
2 each 4.3 mm screw holes, one slot ted
Materials:
Case: ABS
Lid: PC
Duct connectors: ABS
Tubing: PVC
Protection standard:
IP54
Display
2-line display (12 characters/line)
Line 1: Volume or velocity measurement
Line 2: Pressure measurement
Size: 46.0 x 14.5 mm
Electrical connections:
4-screw terminal block
Wire: 12–24 AWG (0.2–1.5 mm2)
Cable entry:
Strain relief: M16
Knockout : 16 mm
Pressure fittings
Male Ø 5.0 mm and 6.3 mm
Electrical
Volt age :
Circuit: 3-wire (V Out, 24 V, GND)
Input: 24 VAC or VDC, ±10 %
Output: 0 –10 V, selectab le via jumper
Power consumption: <1.0 W
Resistance minimum: 1 kΩ
Current:
Circuit: 3-wire (mA Ou t, 24 V, GND)
Input: 24 VAC or VDC, ±10 %
Output: 4 –20 mA, selectable via jumper
Power consumption: <1.2 W
Maximum load: 50 0 Ω
Conformance
Meets req uirements for CE marking:
EMC Directive 2004/108/EY
RoHS Directive 2002/95/E Y
DPT-Flow-1000
DPT-Flow-
2000 DPT-Flow-5000 DPT-Flow-7000
Pa 100-1,000 200-2,000 500-5,000 700-7,000
kPa 0.1 -1. 0 0.2-2.0 0.5-5.0 0. 7-7.0
mbar 1-10 2.0-20 5.0-50 7. 0-7 0
mmWC 10 -100 20-200 50-500 70-700
inWC 0. 4-4.0 0.8-8.0 2.0-20 2.5- 30
Flow units (sel ect via m enu):
Volume: m3/s, m3/hr, cfm, l/s
Velocity: m/s, ft/min
Units Range
m3/s 0.025-5 0
m3/hr 100-200,000
cfm 50-100,000
l/s 25-50,000
m/s 1-1 00
APPLICATIONS
Flow output scale (select via menu):
Copyright HK Instruments 2014 www.hkinstruments. Installation version 2.0 2014
SCHEMATICS
DIMENSIONAL DRAWINGS
IN STALLATION
Figure 1a - Surface mounting
STEP 1: MOUNTING THE DEVICE
1) Mount the device in the desired location (see step 1).
2) Open the lid and route the cable through the strain relief and
connect the wires to the terminal block(s) (see step 2).
3) The device is now ready for configuration.
WARNING! Apply power only after the device is properly
wired.
1) Select the mounting location (duct, wall, panel).
2) Use the device as a template and mark the screw holes.
3) Mount with appropriate screws.
Figure 1b - Mounting orientation
Figure 1c - Application connections
Connection for display
Terminal block
Pressure
sensor
Menu buttons
LED
SELECT
UP
DOWN
ZERO
V OUT
P OUT
24 V
GND
FLOW
PRESSURE
4–20 mA
Out
1–10 V
90.0
77.0
71.5
53.0
4.2
95.0
36.0
DPT-Flow
The pressure tubes are connected to a flow measurement probe (i.e. FloXact), or to the
measurement ports specified by the fan manufacturer. Please see the FloXact installation
guide or the fan manufacturer’s technical specifications for more information.
YES NO NO
Copyright HK Instruments 2014 www.hkinstruments. Installation version 2.0 2014
STEP 2: WIRING DIAGRAMS CONFIGURATION CONTINUED
For CE compliance, a properly grounded shielding cable is required.
1) Unscrew the strain relief and route the cable.
2) Connect the wires as shown in figure 2a and 2b.
3) Tighten the strain relief.
Figure 2a - Wiring diagram: Volume flow output
Figure 2b - Wiring diagram: Pressure output
1) Select the functioning mode of the flow meter:
- Select
Manufacturer
when connecting DPT-Flow to a fan
with pressure measurement points
- Select
Common probe
when using DPT-Flow with a
common measurment probe that follows the formula:
q = k ∙ √∆P
(i.e. FloXact)
STEP 3: CONFIGURATION
2) If
Common probe
selected: select measurement units used in the
formula (aka Formula unit) (i.e. l/s)
b. If
Common probe
selected in step 1:
Each common probe has a specific K-value. Select the K-value from
common probe manufacturer’s specifications.
Available K-value range: 0.001...9999.000
6) Select flow unit for display and output:
Flow volume: m3/s, m3/h, cfm, l/s
Velocity: m/s, f/m
V OUT
Not used
24 V
GND
+ Power supply
24 VDC / 24 VAC
0–10 V / 4–20 mA
V OUT
P OUT
24 V
GND
+ Power supply
24 VDC / 24 VAC
0–10 V / 4–20 mA
MANUFACTURER
Common probe
SELECT
UP
DOWN
Common probe Flakt Woods
SELECT
UP
DOWN
FORMULA UNIT
l/s
SELECT
UP
DOWN
3) Select K-value
a. If manufacturer selected in step 1:
Each fan has a specific K-value. Select the K-value from fan manufacturer’s specifications.
Manufacturer: K-value:
Fläktwoods k = 0,3...99
Rosenberg k = 37...800
Nicotra k = 10...1500
Comefri k = 10...2000
Ziehl k = 10...1500
Ebm-papst k = 10...1500
Gebhardt k = 50...4700
K-VALUE
9000.000
SELECT
UP
DOWN
4) Select pressure unit for display and output: Pa, kPa, mbar, inWC
or mmWC
PRESS.UNIT
Pa
SELECT
UP
DOWN
5) Pressure output scale (p OUT). Select pressure output scale to
improve output resolution.
DPT-Flow-1000 DPT-Flow-2000 DPT-Flow-5000 DPT-Flow-7000
100–1000 Pa
0.1 –1. 0 kPa
1.0 –10 m ba r
10–10 0 m mW C
0.4–4.0 inWC
200–2000 Pa
0.2–2.0 kPa
2.0– 20 mbar
20–200 mmWC
0.8–8.0 inWC
500–5000 Pa
0.5–5.0 kPa
5.0– 50 mbar
50–500 mmWC
2.0– 20 inWC
700–7000 Pa
0.7 – 7. 0 k P a
7.0 – 7 0 m ba r
70-700 m mWC
2.5– 30 inWC
P OUTPUT MAX
2000 Pa
SELECT
UP
DOWN
FLOW UNIT
m
3
/s
SELECT
UP
DOWN
7) Flow output scale (V OUT): Select flow output scale to improve
output resolution.
Unit: Range:
m3/s 0.025–50
m3/h 100–200,000
cfm 50–100,000
l/s 25–50,000
m/s 1.0–100
f/m 2000–20,000
Vout
10 V
V OUTPUT MAX
50.000 m
3
/s
SELECT
UP
DOWN
8) Response time: Select response time between 1.0–20 s.
RESPONSE TIME
20 s
SELECT
UP
DOWN
9) Push select button to save changes and to exit menu.
SELECT
EXIT MENU
SELECT
Copyright HK Instruments 2014 www.hkinstruments. Installation version 2.0 2014
STEP 7: ZEROING THE DEVICE
To zero the device two options are available:
1) Manual Pushbutton zero point calibration
2) Autozero calibration
Does my transmitter have an autozero calibration? See the product
label. If it shows -A Z in the model number, then you have the autozero calibration.
1) Manual Pushbutton zero point calibration
NOTE: Supply voltage must be connected at least one hour prior to
zero point adjustment.
a) Disconnect both pressure tubes from the pressure ports labeled
+ and –.
b) Push down the zero button until the LED light (red) turns on and
the display reads “zeroing” (display option only). (see figure 3)
c) The zeroing of the device will proceed automatically. Zeroing
is complete when the LED turns off, and the display reads 0
(display option only).
d) Reinstall the pressure tubes ensuring that the High pressure
tube is connected to the port labeled +, and the Low pressure
tube is connected to the port labeled −.
WARRANTY POLICY
The seller is obligated to provide a warranty of 24 months for the delivered goods regarding material and manufacturing. The warranty
period is considered to start on the delivery date of the product. If
a defect in raw materials or a production flaw is found, the seller is
obligated, when the product is sent to the seller without delay or before expiration of the warranty, to amend the mistake at his/her discretion either by repairing the defective product or by delivering free
of charge to the buyer a new flawless product and sending it to the
buyer. Delivery costs for the repair under warranty will be paid by the
buyer and the return costs by the seller. The warranty does not comprise damages caused by accident, lightning, flood or other natural
phenomenon, normal wear and tear, improper or careless handling,
abnormal use, overloading, improper storage, incorrect care or reconstruction, or changes and installation work not done by the seller
or his/her authorized representative. The selection of materials for devices prone to corrosion is the buyer’s responsibility, unless otherwise
is legally agreed upon. Should the manufacturer alter the structure of
the device, the seller is not obligated to make comparable changes to
devices already purchased. Appealing for warranty requires that the
buyer has correctly fulfilled his/her duties arisen from the delivery and
stated in the contract. The seller will give a new warranty for goods
that have been replaced or repaired within the warranty, however only
to the expiration of the original product’s warranty time. The warranty
includes the repair of a defective part or device, or if needed, a new
part or device, but not installation or exchange costs. Under no circumstance is the seller liable for damages compensation for indirect
damage.
2) Autozero calibration
If the device includes the optional autozero circuit, no action is required.
Autozero calibration (-AZ) is an autozero function in the form of an automatic zeroing circuit built into the PCB board. The autozero calibration electronically adjusts the transmitter zero at predetermined time
intervals (every 10 minutes). The function eliminates all output signal
drift due to thermal, electronic or mechanical effects, as well as the
need for technicians to remove high and low pressure tubes when
performing initial or periodic transmitter zero point calibration. The autozero adjustment takes 4 seconds af ter which the device returns to
its normal measuring mode. During the 4 second adjustment period,
the output and display values will freeze to the latest measured value.
Transmitters equipped with the autozero calibration are virtually
maintenance free.
a) Disconnect both pressure tubes from the pressure ports labeled
+ and –.
b) Push down the zero button (joystick) until the LED light (red)
turns on and the display reads “zeroing” (display option only). (see
Figure 6)
c) The zeroing of the device will proceed automatically. Zeroing is
complete when the LED turns off, and the display reads 0 (display
option only).
d) Reinstall the pressure tubes, ensuring the High pressure tube is
connected to the port labeled +, and the Low pressure tube is
connected to the port labeled −.
Press down button
LED turns ON
Display reads “Zeroing”
LED
Figure 3
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