Mar 07
Ventilation Control Products Phone: +46-(0)31-811666 E-mail: [email protected]
Sågmästaregatan 1D Fax: +46-(0)31-812766 Web: www.vcp.se
416 80 Göteborg, Sweden
Air Differential Pressure Transmitters
with 0-10 Vdc or 4-20 mA Output
984M-
series
Pressure range
low
high
Response
slow
fast
Mode
linear
*square root
Output signal
0-10 Vdc
4-20 mA
Pressure range
low
high
Response
slow
fast
Mode
linear
*square root
Offset Calibration
This function can be used to correct the zero-point deviation (offset) of the output signal in
depressurised state (example: to 0 V/4mA at zero Pa).
Disconnect the unit from the pressure by opening both hose nozzles or removing the hoses.
Then press the “M” button for 5 s.
M = Mode
Offset Calibration
This function can be used to correct the zero-point deviation (offset)
of the output signal in depressurised state (example: to 0 V/4mA at zero Pa).
Disconnect the unit from the pressure by opening both hose nozzles or removing the hoses.
Then follow the programming instructions on the next page.
Setting of Switching Output
This function is used to set the switching output to “switched through” for a pressure you have defined.
The LED lights up as soon as the defined pressure is reached or exceeded.
Peak Value
The shown low/high peak value is the value that was ever set at the sensor.
A resetting of the peak value can take place only at the manufacturer.
M = Mode
S = SET
LED
Offset Calibration
This function can be used to correct the zero-point deviation (offset)
of the output signal in depressurised state (example: to 0 V/4mA at zero Pa).
Disconnect the unit from the pressure by opening both hose nozzles or removing the hoses.
Then press the “M” button for 5 s.
Setting of Switching Output
This function is used to set the switching output to “switched through” for a pressure you have defined.
Apply the pressure or pressure differential at which the switching output is to be connected.
Then press the “S” button for 5 s until the LED flashes quickly (= value is saved).
The LED lights up as soon as the defined pressure is reached or exceeded.
Pressure range
low
high
Response
slow
fast
Mode
linear
*square root
Output signal
0-10 Vdc
4-20 mA
Switches and jumper settings
984M.3x3104,
0-10 Vdc/4-20 mA without LED display
984M.3x3114,
0-10 Vdc/4-20 mA with LED display
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984M.3x3204,
4-20 mA
*Square root = 984M can be used for volume flow measurement, this product feature is at extra cost and have to be requested when ordering.
switched
open
switched
open
switched
open
M = Mode
S = SET
LED
Error messages
sensor
defect
measurement
exceeding
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