HK Instruments DPT-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 the select button
for 2 seconds
2) Select the functioning mode of the flow meter:
- Select Manufacturer when connecting DPT-MOD to a fan
with pressure measurement points
- Select Common probe when using DPT-MOD with a common
q = k ∙ √∆P (i.e. FloXact)
measurment 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 1:
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 k = 10...1500
Comefri k = 10...2000
Ziehl k = 10...1500
Ebm-papst k = 10...1500
Gebhardt k = 50...4700
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 or
none.
PRESS.UNIT
Pa
6) Select flow unit for display:
/s, m /h, cfm, l/s, none (default)
Flow volume: m
3 3
Velocity: m/s, f/min, none
FLOW UNIT
m 3 /s
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Flakt Woods
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CONFIGURATION
7) Response time: Select response time between 1.0–20 s.
RESPONSE TIME
20 s
8) Select the address for Modbus: 1...247.
ADDRESS
99
9) Select the baud rate: 9600/19200/38400.
UP
BAUD RATE
DOWN
9600
10) Select the parity bit: None/Even/Odd.
PARITY BIT
NONE
11) 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) Manual Pushbutton zero point calibration
2) Autozero calibration
3) Via Modbus register
Does my transmitter have an autozero calibration? See the product la-
bel. If it shows -AZ in the model number, then you have the autozero
calibration.
1) Manual Pushbutton zero point calibration
NOTE: Supply voltage must be connected at least one hour prior to
zero point adjustment.
a) Disconnect both pressure tubes from the pressure ports labeled +
and –.
b) Push down the zero button until the LED light (red) turns on and the
display reads "zeroing" (display option only). (see figure 3)
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 that the High pressure tube
is connected to the port labeled +, and the Low pressure tube is
connected to the port labeled −.
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CONTINUED
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Installation version 7.0 2020