HK Instruments DPT-Dual-MOD-AHU Series Installation Instructions page 3

STEP 3: CONFIGURATION
1) Activate the device Menu by pushing the the select button for 1
second.
2) Select the functioning mode of the device:
- Select Manufacturer when connecting DPT-Dual-MOD-AHU to a
fan with pressure measurement points
- Select Common probe when using DPT-Dual-MOD-AHU with a
common measurement probe that follows the formula:
q = k ∙ √∆P (i.e. FloXact)
MANUFACTURER
Common probe
Common probe
3) If common probe is selected, select measurement unit used in the
formula: m3/s, m3/h, cfm, l/s, m/s or f/min.
Note: When using the FloXact probe, select the formula unit l/s.
For other probe models, check the manufacturer's datasheet for
the correct unit.
FORMULA UNIT
l/s
4) Select K-value
Each application has a specific K-value. Select the K-value from the
manufacturer's specifications.
Available K-value range: 0.001...9999.000
K-VALUE
9000.000
5) Select pressure unit for display:
Pa, kPa, mbar, mmWC, inWC or psi
PRESS.UNIT
Pa
6) Select flow unit for display:
Flow volume: m /s, m /h, cfm, l/s
3 3
Velocity: m/s, f/min (selectable only if a common probe is used with
m/s or f/min unit)
FLOW UNIT
m 3 /s
7) Select the address for Modbus: 1*...247.
ADDRESS
99
Copyright HK Instruments 2023
SELECT
UP
DOWN
SELECT
Flakt Woods
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
CONFIGURATION
8) Select the baud rate: 9600*/19200/38400.
BAUD RATE
9600
9) Select the parity bit: None*/Even/Odd.
PARITY BIT
NONE
10) Select the response time: 1...20 s (factory setup 4 s)
UP
DOWN
RESPONSETIME
20 s
11) Select the the type of sensor for input 1:
NTC10k, Ni1000-LG, Ni1000, Pt1000,
VINPUT (voltage 0–10 V), none
SENSOR 1
NTC10K
12) Select the the type of sensor for input 2:
NTC10k, Ni1000-LG, Ni1000, Pt1000,
VINPUT (voltage 0–10 V), none
SENSOR 2
NONE
13) Push the select button to save settings and exit menu.
SELECT
EXIT MENU
* Factory setup
STEP 4: ZERO POINT ADJUSTMENT
NOTE! Always zero the device before use.
Supply voltage must be connected one hour before the zero point
adjustment is carried out. Access via Modbus or by pushbutton.
1) Loose both tubes from the pressure inlets + and -.
2) Press the select button for 1 sec to
enter the menu and select zero sensors.
3) Wait until the LED turns off and then install tubes again for the
pressure inlets.
www.hkinstruments.fi
CONTINUED
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
Installation version 1.0 2023
SELECT