HK Instruments DPT-R8 Series User manual

Thank you for choosing an HK Instruments DPT Series Differential
Pressure Transducer. The DPT Series is intended for use in commercial
environments. It is designed with four unit selections (inWC, mmWC, Pa,
mbar) and eight eld selectable measumerement ranges (Unidirectional
and Bi-directional) to meet your job measurement requirements. The
DPT-R8 Series Differential Pressure Transducers is comprised of the
DPT1-R8 with ranges from 0.1 to 1.0 inWC, the DPT10-R8 with ranges
from 0.5 to 10.0 inWC, and the DPT30-R8 with ranges 10.0 to 30.0 inWC.
All DPT-R8 Series Differential Pressure Transducers are available with
display, and NIST standard calibration certicates.
APPLICATIONS
DPT-R8 series devices are commonly used in
HVAC/R systems for:
• fan, blower and filter monitoring
• pressure and flow monitoring
• valve and damper control
• pressure monitoring in clean rooms
Copyright HK Instruments Installation Version 1.0 2012
DIFFERENTIAL PRESSURE TRANDUCERS - AIR
DPT1-R8 / DPT10-R8 / DPT30-R8
INTRODUCTION WARNING
INSTALLATION
INSTRUCTIONS
●READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING
TO INSTALL, OPERATE OR SERVICE THIS DEVICE.
●Failure to observe safety information and comply with instructions could
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 re 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
specications and performance characteristics are not designed or
controlled by HK Instruments, Inc. Review applications and national an
local codes to assure that the installation will be functional and safe. Use
only experienced, knowledgeable, technicians to install this device.
SPECIFICATIONS
Performance
Accuracy (at applied pressure):
Ranges < 0.5 inWC = ±0.01 inWC
Ranges ≥ 0.5 inWC = ±1.5% inWC
Accuracy specications 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
Burst Pressure: 120 inWC
Zero Point Calibration:
Automatic with circuit or Manual pushbutton Auto-Zero
Response Time:
4.0 sec or 0.8 sec, selectable via jumper
Technical Specications
Media Compatibility:
Dry air or non-aggressive gases
Measuring units:
Pa, mbar, inWC, mmWC, selectable via jumper
Measuring element:
Piezoresistive
Environment:
Operating Temperature: 14 -122°F (-10 - 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 0.1875” (4.3mm) screw holes, one slotted
Materials: Case: ABS (UL 94 V-0 Approved)
Lid: PC (UL 94 V-0 Approved)
Protection standard: IP54 / NEMA3
Display (Optional)
3 1/2 Digit LCD Backlit Display
2-Line Display (12 character/line)
Line 1: Active Measurement
Line 2: Units
Size: 1.81” x 0.57”
Electrical Connections:
4 screw terminal block
Wire: 12-24AWG (0.2 – 1.5 mm)
Cable Entry:
Strain Relief: M16
Knockout : 0.625” (16mm)
Pressure Fittings:
3/16” (5.2mm) barbed brass
+ High pressure
− Low pressure
Electrical
Voltage:
Circuit: 3-wire (V Out, 24V, GND)
Input: 24VAC or VDC, ±10%
Output: 0-5V or 0-10V, selectable via jumper
Power Consumption: <1.0W
Resistance Minimum: 1k
Current:
Circuit: 3-wire (mA Out, 24V, GND)
Input: 24VAC or VDC, ±10%
Output: 4-20 mA, selectable via jumper
Power Consumption: <1.2W
Maximum load: 500
Conformance
Meets requirements for CE marking:
EMC directive 2004/108/EY
RoHS Directive 2002/95/EY
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.

Copyright HK Instruments Installation Version 1.0 2012
SCHEMATICS
MOUNTING THE DEVICE
INSTALLATION
STEP 1
1) Select mounting location (duct, wall, panel)
2) Use the device as a template and mark the screw holes
3) Mount with appropriate screws (not included)
YES NO NO
Figure 3b - Mounting Orientation
3.54
(90.0)
3.03
(77.0)
2.815
(71.5)
2.086
(53.0)
0.169
(4.2)
3.74
(95.0)
1.41
(36.0)
in
(mm)
Pressure Sensor
Zero Button Connection for
optional display
Terminal Block
LED
Jumpers
1) Mount the device in desired location (see step 1)
2) Open lid and route cable through strain relief and connect wires to
terminal block (see step 2)
3) Device is now ready for conguration
WARNING! Apply power after the device is properly wired.
Figure 3a - Surface Mounting
DIMENSIONAL DRAWINGS
Figure 3c - Application Connections
Static Pressure Filter/Damper
Monitoring
Fan/Blower
Monitoring
Not
Connected

Copyright HK Instruments Installation Version 1.0 2012
SELECTING RESPONSE TIME
The response time affects how fast the transducer reacts to
changes in the system. Response time is the time the device takes
to reach half of the change in the measured value. To smooth out
unstable pressure uctuations in airow applications, select longer
response time.
Example:
Selected response time: 4.0 seconds
Selected measurement unit: inWC
Change in the system: increase of ∆P1= 2
Result: Output signal = ∆P2= 1, in 4.0 seconds after the change in
the system (½ ∆P1= ∆P2= 1).
To change response time, install or remove jumper on J4 (see
gure 5)
1) Install jumper on J4 for 4.0 Second response time.
2) Remove jumper from J4 for 0.8 Second response time.
CONFIGURATION
1) Select the desired measurement unit (see step 3)
2) Select the desired measurement range (see step 4)
3) Select the desired response time (see step 5)
4) Zero the device (see step 6)
5) Connect pressure tubes. Connect postive pressure to port
labeled “+” and negative pressure port to “-”
6) Close the lid. The device is ready to use.
SELECTING MEASUREMENT UNIT
1) To change the measurement unit appearing on the display, install
a Jumper to both pins of J5 (See gure 5)
2) Push down the zero button (joystick) and the measurement unit
options (inWC, mmWC, Pa, mbar) will cycle on the display.
3) To select a unit option to display, remove the jumper from J5
while the measurement unit is visible in the display.
STEP 3
SELECTING THE MEASUREMENT RANGE
1. Determine Range Number.
a. Find Model # in Chart 1.
b. Find Measurement Unit (selected in Step 3), in the left
column, under applicable Model #.
c. Find required Measurement Range on the same line as the
Measurement Unit (b above) and determine Range Number
in the header.
2. Install jumpers on J1, J2, and J3 as required.
a. Using the Range Number from 1c above, nd corresponing
Range Number in Chart 2.
b. Install jumpers on J1, J2, and J3 on device, as shown
under the Range Number in Chart 2. (Grey color indicates
that a jumper is installed. Reference Figure 5 for jumper
installation)
Range 1 Range 2 Range 3 Range 4 Range 5 Range 6 Range 7 Range 8
inWC
Pa
mbar
mmWC
-0.1-0.1
-25-25
-0.25-0.25
-2.5-2.5
-0.25-0.25
-62-62
-0.62-0.62
-6.4-6.4
-0.5-0.5
-125-125
-1.25-1.25
-12.7-12.7
-1.0-1.0
-250-250
-2.5-2.5
-25.4-25.4
0-0.1
0-25
0-0.25
0-2.5
0-0.25
0-62
0-0.62
0-6.4
0-0.5
0-125
0-1.25
0-12.7
0-1.0
0-250
0-2.5
0-25.4
Model# DPT1-R8
Model# DPT10-R8
Range 1 Range 2 Range 3 Range 4 Range 5 Range 6 Range 7 Range 8
inWC
Pa
mbar
mmWC
-0.5-0.5
-125-125
-1.25-1.25
-12.7-12.7
-2.5-2.5
-622-622
-6.2-6.2
-64-64
-5.0-5.0
-1250-1250
-12.5-12.5
-127-127
0-0.5
0-125
0-1.25
0-12.7
0-1.0
0-250
0-2.5
0-25.4
0-2.5
0-622
0-6.2
0-64
0-5.0
0-1250
0-12.5
0-127
0-10.0
0-2500
0-25
0-254
FIGURE 3
For CE compliance, a properly grounded shielding cable is
required.
1) Unscrew strain relief and route cable.
2) Connect the wires as shown in gure 4a or 4b.
3) Tighten the strain relief.
WIRING DIAGRAMS STEP 2
V
0-10V
Not Used
24V
GND
+ Power Supply
24VDC / 24VAC
A
Not Used
4-20mA
24V
GND
+ Power Supply
24VDC / 24VAC
STEP 4
STEP 5
Figure 4a - Wiring Diagram 0-10V Output
Figure 4b - Wiring Diagram 4-20mA Output
Chart 1
Model# DPT30-R8
inWC
Pa
mbar
mmWC
-5.0-5.0
-1250-1250
-12.5-12.5
-127-127
-10.0-10.0
-2500-2500
-25-25
-254-254
-15.0-15.0
-3750-3750
-37.5-37.5
-380-380
0-10
0-2500
0-25
0-254
0-15
0-3750
0-37.5
0-380
0-20
0-5000
0-50
0-508
0-25
0-6250
0-62.5
0-635
0-30
0-7500
0-75
0-762
Range 1 Range 2 Range 3 Range 4 Range 5 Range 6 Range 7 Range 8
Range 7 Range 8Range 1 Range 2 Range 3 Range 4 Range 5 Range 6
Jumper J1
Jumper J2
Jumper J3
Chart 2
(Grey color indicates that a jumper is installed. Reference Figure 5 for jumper installation)
Figure 5 - Jumper Installation
No Jumper
Circuit Open
Jumper StoredJumper Installed
Cicuit Closed
(Grey color indicates that a jumper is installed)

Copyright HK Instruments Installation Version 1.0 2012
ZERO THE DEVICE STEP 6
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 −.
NOTE: The zero point should be calibrated via manual auto zero,
one hour after installation and at least every 12 months during
normal operations.
2) function
If the device includes the optional e-zero circuit, no action is
required.
(-AZ) is a True Auto Zero function in the form of an
automatic zeroing circuit built into the PCB board. The
function electronically adjusts the transducer zero at predeter-
mined 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
transducer zero point calibration. The adjustment takes 4
seconds after 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.
Transducers equiped with the function are virtually
maintenance free.
To zero the device two options are available:
1) Manuel Pushbutton Auto Zero
2) zero point calibration function
Does my transducer have an function?
See the product label. If it shows –AZ in the model number, then you
have the function.
1) Manual Pushbutton Auto Zero
NOTE: Supply voltage must be connected at least one hour prior to
zero point adjustment.
Figure 6 - Zeroing
Press Down Button
LED turns ON
Display reads “Zeroing”
LED
FIGURE 3WARRANTY POLICY
(a) WARRANTY COVERAGE: HK warrants to the original end user
of the Products that the Products will, at the date of initial
purchase, meet the applicable specication for such Products (as
described by HK in its product literature) and, under normal use
and service, will be free from any defects in materials or manufac-
ture for (a) one (1) year from date of sale to end user for electrome-
chanical Products and (b) ve (5) years from date of manufacture
for electronic Products.
(b) NO WARRANTY OF PRODUCT SUITABILITY: Neither HK nor
the manufacturer of the Products to be sold hereunder
(“Manufacturer”) makes any warranty that Products are suitable for
a particular purpose, application or design. Many states and
localities have differing codes or regulations governing the installa-
tion and/or use of HK products. HK does not guarantee compli-
ance with such codes or regulations; the end user is solely
responsible for safe and correct installation and use of the Prod-
ucts and for compliance with such codes and regulations.
(c) EXCLUSION OF IMPLIED WARRANTIES: THE WARRANTY
HEREIN IS THE ONLY WARRANTY APPLICABLE TO THE PROD-
UCTS AND EXCLUDES ALL OTHER WARRANTIES, INCLUDING
ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE, AND ANY IMPLIED WARRANTY ARIS-
ING FROM COURSE OF DEALING OR USAGE OF TRADE.
(d) REMEDIES FOR NON-CONFORMITY OR BREACH OF WAR-
RANTY: If the Product purchased does not conform to the appli-
cable warranty, HK will provide, at its option, one of the following
remedies: (1) repair of the non-conforming Product, (2) replace-
ment with a conforming Product, or (3) refund of the original
purchase price. THESE REMEDIES SHALL BE THE EXCLUSIVE
AND SOLE REMEDY for any breach of warranty. HK and Manufac-
turer have no other responsibility or liability for breach of warranty
or otherwise.
(e) LIMITATION OF LIABILITY: NEITHER HK NOR MANUFAC-
TURER WILL BE LIABLE FOR ANY INCIDENTAL, SPECIAL,
INDIRECT, OR CONSEQUENTIAL DAMAGES UNDER ANY
CIRCUMSTANCE, INCLUDING WITHOUT LIMITATION ANY
DEFECT IN THE PRODUCT PURCHASED.
(f) FURTHER LIMITATIONS: The warranty herein does not cover
damage caused by lightning, ood or other natural phenomenon;
normal wear and tear; accident, improper or careless handling,
abnormal use, overloading, improper storage or abuse; incorrect
installation, care or reconstruction; or alteration, calibration,
reconguration, maintenance or installation work done by unquali-
ed personnel. Should Manufacturer alter the structure of any
Product in the future, HK and Manufacturer shall not be obligated
to make comparable changes to Products already purchased. HK
will give a new warranty for Products being replaced or repaired
within the warranty period, however only to the expiration of the
original Product’s warranty period. The warranty includes the repair
of a defective part or device, or if needed, a new part or device,
but no other costs except as otherwise stated in the HK Distributor
Terms and Conditions.