HK Instruments DPT-PRIIMA-MOD Series Installation Instructions page 3

STEP 3: CONFIGURATION
NOTE: The flow unit none is selected by default and the display
shows only the pressure reading.
1) Activate the device Menu by pushing the select button
for 2 seconds
2) Select the functioning mode of the flow meter:
- Select Manufacturer when connecting DPT-Priima-MOD to a
fan with pressure measurement points
- Select Common probe when using DPT-Priima-MOD with a
q = k ∙ √∆P (i.e. FloXact)
common measurement probe that follows the formula:
MANUFACTURER
Common probe
Common probe
3) If Common probe selected: select measurement units used in the
formula (aka Formula unit) (i.e. l/s)
FORMULA UNIT
l/s
4) Select K-value
a. If manufacturer selected in step 2:
Each fan has a specific K-value. Select the K-value from fan manufac-
turer's specifications.
Manufacturer: K-value:
Fläktwoods k = 0.3...99
Rosenberg k = 37...800
Nicotra-Gebhardt k = 50...4700
Comefri k = 10...2000
Ziehl k = 10...1500
ebm-papst k = 10...1500
Gebhardt k = 50...4700
Nicotra k = 50...5300
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.
K-VALUE
9000.000
5) Select pressure unit for display: Pa, kPa, mbar, inWC, mmWC, psi or
none.
PRESS.UNIT
Pa
6) Select desired pressure range:
±120 Pa, ±240 Pa, ±620 Pa, ±1240 Pa, ±2490 Pa
PRESS. RANGE
±120 Pa
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Flakt Woods
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CONFIGURATION
7) Select flow unit for display:
Flow volume: m
Velocity: m/s, f/min, none
FLOW UNIT
m 3 /s
8) Response time: Select response time between 0.4–20 s.
RESPONSE TIME
20 s
9) Select the address for Modbus: 1...247.
ADDRESS
UP
99
DOWN
10) Select the baud rate: 9600/19200/38400.
BAUD RATE
9600
11) Select the parity bit: None/Even/Odd.
PARITY BIT
NONE
12) Push select button to save changes and to exit menu.
SELECT
EXIT MENU
STEP 4: ZEROING THE DEVICE
NOTE! Always zero the device before use.
To zero the device three options are available:
1) Autozero calibration (manual zeroing not required)
2) Manual Pushbutton zero point calibration
3) Via Modbus register
1) Autozero calibration
Autozero calibration (-AZ) is an autozero function in the form of an
automatic zeroing circuit built into the PCB board. The autozero cali-
bration 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 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.
Transmitters equipped with the autozero calibration are virtually main-
tenance free and manual zeroing is not required.
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CONTINUED
/s, m /h, cfm, l/s, none (default)
3 3
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Installation version 1.0 2022