Copyright HK Instruments, Inc. 2017
www.hkinstrumentsinc.com
Installation version 2.0 2017
INSTALLATION
INSTRUCTIONS
AIR FLOW AND VELOCITY TRANSMITTERS
DPT-FLOW SERIES-4
• 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.
Thank you for choosing an HK Instruments DPT-Flow Series-4 air
flow transmitter. The DPT-Flow Series-4 is intended for use in com-
mercial 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-4 air flow transmitter is comprised of the
DPT-Flow-4, DPT-Flow-8, DPT-Flow-20 and DPT-Flow-30 with
measurement ranges of 0–4 inWC, 0–8 inWC, 0–20 inWC and
0–30 inWC, respectively. All models come with display and manu-
al push-button auto-zero. The DPT-Flow is available with optional
and NIST standard calibration certificates.
SPECIFICATIONS
Performance
Accuracy
(at applied pressure):
Ranges < 0.5 inWC = ±0.01 inWC
Ranges 0.5 inWC = ±1.5 % inWC
(Accuracy specifications include: general accuracy,
temperature drift, linearity, hysteresis, long term
stability, and repetition error).
Thermal effects:
Temperature compensated across the full spectrum of
capability.
Overpressure:
Proof Pressure: 100 inWC
Zero point calibration:
Automatic with
function or
manual pushbutton autozero
Response time:
1.0−20 sec, selectable via menu
Technical Specifications
Media compatibility:
Dry air or non-aggressive gases
Pressure units
(select via configuration menu):
Pa, kPa, mbar, inWC, mmWC
Pressure output range
(select via configuration menu)
Flow units
(select via configuration menu):
Volume: m
3
/s, m
3
/hr, cfm, l/s
Velocity: m/s, fpm
Flow output range
(select via configuration menu):
Measuring element:
MEMS
Environment:
Operating temperature:
14−122 °F (-10−50 °C)
with
(-eZ) circuit option
23−122 °F (-5−50 °C)
Configuration, while using display
32−122 °F (0−50 °C)
Storage temperature:
-4−158 °F (-20−70 °C)
Humidity:
0 to 95 % rH, non condensing
Physical
Case:
Dimensions: 3.54” x 3.74” x 1.4”
(90.0 x 95.0 x 36.0 mm)
Weight: 5.3 oz (150 g)
Mounting:
2 each 11/64” (4.3 mm) screw holes, one slotted
Materials:
Case: ABS (UL 94 V-0 Approved)
Lid: PC (UL 94 V-1 Approved)
Protection standard: IP54 / NEMA3
Display
(required for configuration):
2-line display (12 characters/line)
Size: 1.81” W x 0.57” H
(46.0 x 14.5 mm)
Electrical connections:
4-screw terminal block
Wire: 12–24 AWG (0.2–1.5 mm
2
)
Cable entry:
Strain relief: M16
Knockout ø: 0.625” (16 mm)
Pressure fittings:
3/16” ø (5.2 mm) barbed brass
+ High pressure
− Low pressure
Electrical
Voltage:
Circuit: 3-wire ([V Out or P out], 24 V, GND)
Input: 24 VAC or VDC, ±10 %
Output: 0–10 V, selectable via jumper
Power consumption: <1.0 W
Resistance minimum: 1 kΩ
Current:
Circuit: 3-wire ([V out or P out] Out, 24 V, GND)
Input: 24 VAC or VDC, ±10 %
Output: 4–20 mA, selectable via jumper
Power consumption: <1.2 W
Maximum load: 500 Ω
Conformance
Meets requirements for CE marking:
EMC Directive 2014/30/EU
RoHS Directive 2011/65/EU
Meets safety requirements for electrical equipment for
measurement, control, and laboratory use:
ETL marking, standard IEC61010-1.
Product is tested and meets the NRTL product
approval requirements.
INTRODUCTION
WARNING
AVERTISSEMENT
• LISEZ ATTENTIVEMENT CES INSTRUCTIONS AVANT DE PROCÉDER À
L’INSTALLATION, LA MISE EN SERVICE OU L’ENTRETIEN DE CET APPAREIL.
• Le non-respect des informations et instructions de sécurité peut entraîner DES
DOMMAGES CORPORELS, LA MORT ET/OU DES DÉGÂTS MATÉRIELS.
• Afin d’éviter les chocs électriques et les dommages matériels, déconnectez
l’alimentation électrique avant l’installation ou l’entretien, et utilisez uniquement du
câblage avec isolement assigné pour une tension d’alimentation optimale.
• Afin de prévenir les risques d’incendie et/ou d’explosion, n’utilisez pas l’appareil
dans des environnements potentiellement inflammables ou explosifs.
• Conservez ces instructions à titre de référence.
• Une fois installé, ce produit fera partie d’un système technique dont les
spécifications et les caractéristiques de performance ne sont ni conçues ni
contrôlées par HK Instruments. Consultez les applications et les codes nationaux
et locaux pour garantir le fonctionnement correct et sûr de l’installation. Ne faites
appel qu’à des techniciens expérimentés et compétents pour installer cet appareil.
APPLICATIONS
DPT-Flow Series-4 devices are commonly used in HVAC/R sys-
tems for:
• air flow and pressure monitoring across centrifugal fans and
blowers
• in-duct air flow and pressure monitoring
• VAV applications
Units
Range
m3/s
0.025-50
m3/hr
100-200,000
cfm
50-100,000
DPT-Flow-4
DPT-Flow-8
DPT-Flow-20
DPT-Flow-30
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
7.0-70
mmWC
10-100
20-200
50-500
70-700
inWC
0.4-4.0
0.8-8.0
2.0-20
2.5-30
Units
Range
l/s
25-50,000
m/s
1-100
ft/min
2,000-20,000
RoHS 2
2011/65/EU
4002576
Conforms to ANSI/UL Std 61010
Certified to CAN/CSA Std C22.2 No 61010
COMPANY WITH
MANAGEMENT SYSTEM
CERTIFIED BY DNV GL
= ISO 9001 = ISO 14001 =
