Copyright HK Instruments 2022
www.hkinstruments.fi
Installation version 1.0 2022
INSTALLATION
INSTRUCTIONS
DIFFERENTIAL PRESSURE TRANSMITTERS
DPT-Priima-MOD Series
• 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-Priima-MOD series
transmitter. DPT-Priima-MOD is a multifunctional high accuracy trans-
mitter for measuring volume flow, velocity, and static and differential
pressure. It is designed for cleanrooms and other demanding applica-
tions. The measurements can be read and the configuration done via
Modbus communication. DPT-Priima-MOD can also be used with sev-
eral different measurement probes such as FloXact™ or pitot tube, and
air dampers.
DPT-Priima-MOD models come with a local display and an automatic
zero point calibration. Calibration certificate available as an option.
DPT-Priima-MOD is commonly used in applications requiring high
measurement accuracy:
• monitoring pressure in cleanrooms
• monitoring pressure difference across the building envelope
• monitoring pressure and flow
SPECIFICATIONS
Performance
Measurement ranges:
±120 Pa*, ±240 Pa, ±620 Pa, ±1240 Pa, ±2490 Pa
(selectable via menu or modbus)
*default range
Accuracy (at applied pressure):
0.4 % ±0.4 Pa
(Including: general accuracy, linearity, hysteresis, long
term stability, and repetition error)
Overpressure:
Proof pressure: 10 kPa
Burst pressure: 30 kPa
Zero point calibration:
Automatic autozero, manual pushbutton or via Modbus
register
Response time:
0.4−20 s, selectable via menu or via Modbus register
(63 % of the change)
Communication
Protocol: MODBUS over Serial Line
Transmission Mode: RTU
Interface: RS485
Byte format (11 bits) in RTU mode:
Coding System: 8-bit binary
Bits per Byte:
1 start bit
8 data bits, least significant bit sent
first
1 bit for parity
1 stop bit
Baud rate: selectable in configuration
Modbus address: 1−247 addresses selectable in
configuration menu
Technical Specifications
Media compatibility:
Dry air or non-aggressive gases
Pressure units (select via menu):
Pa, kPa, mbar, inWC, mmWC, psi
Flow units (select via menu):
Volume: m
3
/s, m
3
/h, cfm, l/s
Velocity: m/s, ft/min
Measuring element:
MEMS, no flow-through
Environment:
Operating temperature: -5...50 °C
Temperature compensated range 0...50 °C
Storage temperature: -40...70 °C
Humidity: 0 to 95 % rH, non condensing
Physical
Dimensions:
Case: 102.0 x 71.5 x 36.0 mm
Weight:
150 g
Mounting:
2 each 4.3 mm screw holes, one slotted
Materials:
Case: ABS
Lid: PC
Pressure fittings: Brass
Tubing: Silicone
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: 0.2–1.5 mm
2
(16–24 AWG)
Cable entry:
Strain relief: M16
Knockout : 16 mm
Pressure fittings
Male ø 5.2 mm
+ High pressure
- Low pressure
Electrical
Supply voltage:
24 VAC or VDC ± 10 %
Power consumption:
< 1 W
< 2.2 W during AZ-calibration
Output signal:
via Modbus
Conformance
Meets requirements for:
CE:
UKCA:
EMC:
2014/30/EU
S.I. 2016/1091
RoHS:
2011/65/EU
S.I. 2012/3032
WEEE:
2012/19/EU
S.I. 2013/3113
APPLICATIONS
INTRODUCTION
WARNING
RoHS
COMPLIANT
