Sensors PG1 | Data sheet No. 13170 | Version 03-2020 |
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Volume flow indicator / monitor / transmitter SENSO-X® VPX
J1
J2
J3
LED
S1
S2
S3
ZERO
S5
ON
CO
NC
NO
24V
0V
Out mA
Out V
ches the setting back and forth between m³/h, l/s and ft³/min.
The volume flow is displayed in numerals and as an indicator
bar. The indicator bar serves to visualize the measured volume
flow in % in relation to the set working range (Range max).
Programming the SENSO-X®
VPX
(valid from firmware 1.0.2.8)
While programming, the current values on the display and the
analog output are frozen. Hold down the lower key (S1) to enter
the programming mode. The adjustable parameter is displayed
in flashing mode. Press S1 repeatedly to move through the
menu in the following sequence:
•
Limit (value) infinitely adjustable between 0 and the upper
end of the working range
•
Range max. (working range) infinitely adjustable between 0
and 99,999m³/h, 27,777 l/s or 58,857 ft³/min.
•
Out (analog output setting): 4 – 20 mA or 0 – 10 V
•
MANUFACTOR (fan manufacturer identifier): A to D
•
K-factor, infinitely adjustable between 0 and 6.553,5 (default 500)
•
NO OF VENT (number of fans/ventilator in the fan grid):
1 (default) – 20
•
Air density ρ, infinitely adjustable between 0 and 2.0
(default 1.15 kg/m³)
•
BUS ADDR* (Bus Address): 1 – 127
•
BAUD* (Baud rate): 9.6k (default), 14.4k, 19.2k, 38.4k or
56k baud)
•
PAR* (Paritätseinstellung Modbus): Even, Odd or None
•
TEMP GRAD CEL (temperature on the circuit board in °C)
•
PRESS AMBI hPA (absolute atmospheric pressure inside the
device housing, shown in hPa)
•
SW VERS (Software version)
•
FACTORY RESET (resets the device to factory settings)
* for Modbus versions only
Use the keys at the top left (S2) and top right (S3) to change the
parameter value shown in the flashing display area:
Short keystroke
→
single steps,
Long keystroke
→
increases rate of change
The LED changes color when the set limit value is reached: LED
red on limit value undershoot and green on overshoot.
The working range extends to the value in m³/h, l/s or ft³/min.
that corresponds to an analog output of 20 mA or 10 V. This
value can be set under the menu item Range max.
For example: set working range 20,000 m³/h
at 0 m³/h , the AO is 4 mA or 0 V
at 20,000 m³/h , the AO is 20 mA or 10 V
Save (OK)
After 10 s without a keystroke the set values are saved
automatically and the display and the analog output return to
operating mode.
Factory settings
To reset the device to its factory settings, select the menu item
Factory Reset. The display flashes “ZERO”. Hold down the “ZERO”
key for 3 s. Then the display flashes “DONE”. All previous settings
of the limit value and working range as well as any bus settings
return to their default values.
0-point adjustment
It is possible for volume flow readings to drift upwards or down-
wards by up to a few m3/h for a period of up to four weeks after
initial start-up. This is no defect. To compensate for this drift
you can perform a manual zero-point adjustment. Depressurize
the measurement inputs (draw off both hoses). Hold down the
ZERO key for ca. 3 s. The display flashes „ZERO“. Briefly press the
S1 key. The device recalibrates and the display flashes “DONE”
for ca. 10 s.
Display of differential pressure for verification purposes
On pressing keys S2 and S3 the measured differential pressure is
displayed for as long as they are held down.
Electrical connection
If the relay is de-energized (falling below the limit or voltage
drop), COM and NC are connected.
For Modbus connection to terminal J1 see next page.
Caution:
Disconnect all power supplies before opening the housing.
The housing may only be opened by a trained electrician.
Observe supply and switching voltage ratings. Observe the
following symbols on the device:
Danger – High Voltage!
Disconnect power supply before working
on the device
Observe Instructions
