VCP 984M Series User manual

Mar 07
Ventilation Control Products Phone: [phone] E-mail: [email protected]
Sågmästaregatan 1D Fax: [phone] Web: www.vcp.se
416 80 Göteborg, Sweden
Air Differential Pressure Transmitters
with 0-10 Vdc or 4-20 mA Output
984M-
series
Features
• Selectable output via jumper
0-10 Vdc or 4-20 mA output, 3-wire
with power supply 24 Vac/dc
• 4-20 mA output, 2-wire
with power supply 24 Vdc
• LED display as option on the 3-wire version
•2 adjoining pressure ranges in one unit,
pressure ranges selectable via jumper
•Pressure ranges
from 0-100 Pa up to 0-250 kPa
•Response time 100 ms and 1 s
selectable via jumper
Technical data
Pressure medium Air and non-aggressive gases
Linearity and
hysteresis error < ± 1 % of FS
Working temperature 0 to +50 °C
Storage temperature -10 to +70 °C
Long-term stability, typ. < ± 0.5 % to 2.5% of FS / year
(depending on pressure range)
Repetition accuracy <± 0.2 % of FS
Position dependence < ± 0.02 % of FS / g
Humidity 0 to 95 % rel, non-condensing
Response time 100 ms or 1 s
(jumper selectable)
Maximum load < 500 ohm
Process connection 6 mm hose pipe
Electrical connection Screw terminal block for wire
up to 1.5 mm2
Mounting Screw mounting with
serrated screws
Housing material Housing with process
connection P2 made of ABS,
mounting part with process
connection P1 made of POM
Housing dimensions approx. Ø 85 x 58 mm
Weight approx. approx. 130 g
Protection category
to EN60529 IP54
Cable conduit for
protection cap M20 x 1.5 made of Polyamide
Standards / Conformance EN60770, EN61326
Display, optional Red LED display, 3.5 digits
(only on 984M.3x3314)
984M without LED display 984M with LED display
984M are supplied with duct fixing kit,
packed together in a carton
Description
The differential pressure transmitters of the 984M series are
used for measuring differential pressure, positive pressure
and vacuum.
Selection of output signal
The output signal of the 3-wire version is configurable.The
factory setting is for a 0-10 Volt output signal, but this can be
changed to 4-20 mA by removing the jumper. The 2-wire
version is only available with a 4-20 mA output signal.
Selection of pressure range
To adapt best for the application the transmitter can be
selected between two adjoining pressure ranges. Factory
setting is for the most sensitve range, by opening of a
jumpered bridge the less sensitive range is activated.
Selection of response time
The response time of the output signal can be selected by a
jumpered bridge. Factory setting is for a slow response time
(1 s), which dampens short pressure peaks. To work with a
fast response time (100ms) this bridge needs to be replaced.
Easy offset calibration
The output signal can be calibrated to zero by pressing the
M key (pressure transmitter must be depressurised).
Switching output (only for the 3-wire version)
As well as an analogue output signal, the differential pressure
transmitter contains an adjustable transistor switching output
with a maximum switching capacity of 35 Vdc/100 mA.
Measuring method
Piezoresistive pressure transducer
Mounting position
They can be mounted in any position. Due to the
selfcompensating piezoresistive pressure transducer any
possible mounting error is eliminated.

984M-
series Mar 07
Ventilation Control Products Phone: [phone] E-mail: [email protected]
Sågmästaregatan 1D Fax: [phone] Web: www.vcp.se
416 80 Göteborg, Sweden
Air Differential Pressure Transmitters
with 0-10 Vdc or 4-20 mA Output
Ordering
Electrical connections
984M.3x3104 and 984M.3x3114,
0-10 Vdc / 4-20 mA output, 3-wire,
with switching output
984.3x3204
4-20 mA output, 2-wire
____________________________________________________________________________________________________________
Type no. Analogue Analogue Pressure Pressure Conn. Power LED Switch.
output 1 output 2 range 1 range 2 supply display output
____________________________________________________________________________________________________________
984M.323104 0-10 Vdc 4-20 mA 0 to 100 Pa 0 to 250 Pa 3-wire 24 Vac/dc no yes
984M.333104 0-10 Vdc 4-20 mA 0 to 250 Pa 0 to 500 Pa 3-wire 24 Vac/dc no yes
984M.343104 0-10 Vdc 4-20 mA 0 to 500 Pa 0 to 1.000 Pa 3-wire 24 Vac/dc no yes
984M.353104 0-10 Vdc 4-20 mA 0 to 1 kPa 0 to 2.5 kPa 3-wire 24 Vac/dc no yes
984M.373104 0-10 Vdc 4-20 mA 0 to 5 kPa 0 to 10 kPa 3-wire 24 Vac/dc no yes
984M.393104 0-10 Vdc 4-20 mA 0 to 25 kPa 0 to 50 kPa 3-wire 24 Vac/dc no yes
984M.3B3104 0-10 Vdc 4-20 mA 0 to 100 kPa 0 to 250 kPa 3-wire 24 Vac/dc no yes
___________________________________________________________________________________________________________
984M.323114 0-10 Vdc 4-20 mA 0 to 100 Pa 0 to 250 Pa 3-wire 24 Vac/dc yes yes
984M.333114 0-10 Vdc 4-20 mA 0 to 250 Pa 0 to 500 Pa 3-wire 24 Vac/dc yes yes
984M.343114 0-10 Vdc 4-20 mA 0 to 500 Pa 0 to 1.000 Pa 3-wire 24 Vac/dc yes yes
984M.353114 0-10 Vdc 4-20 mA 0 to 1 kPa 0 to 2.5 kPa 3-wire 24 Vac/dc yes yes
984M.373114 0-10 Vdc 4-20 mA 0 to 5 kPa 0 to 10 kPa 3-wire 24 Vac/dc yes yes
984M.393114 0-10 Vdc 4-20 mA 0 to 25 kPa 0 to 50 kPa 3-wire 24 Vac/dc yes yes
984M.3B3114 0-10 Vdc 4-20 mA 0 to 100 kPa 0 to 250 kPa 3-wire 24 Vac/dc yes yes
__________________________________________________________________________________________________________
984M.323204 4-20 mA 0 to 100 Pa 0 to 250 Pa 2-wire 24 Vdc no no
984M.333204 4-20 mA 0 to 250 Pa 0 to 500 Pa 2-wire 24 Vdc no no
984M.343204 4-20 mA 0 to 500 Pa 0 to 1.000 Pa 2-wire 24 Vdc no no
984M.353204 4-20 mA 0 to 1 kPa 0 to 2.5 kPa 2-wire 24 Vdc no no
984M.373204 4-20 mA 0 to 5 kPa 0 to 10 kPa 2-wire 24 Vdc no no
984M.393204 4-20 mA 0 to 25 kPa 0 to 50 kPa 2-wire 24 Vdc no no
984M.3B3204 4-20 mA 0 to 100 kPa 0 to 250 kPa 2-wire 24 Vdc no no
____________________________________________________________________________________________________________
Air differential pressure transmitter
4
3
2
1
Switching output, npn
(GO) GND
(Y) Output 0-10 Vdc and 4-20 mA
(G) Power supply 24 Vac/dc
4
3
2
1
(NC) Do not use
(NC) Do not use
(Y) Output 4-20 mA
(G) Power supply 24 Vdc
4...20 mA

Mar 07
Ventilation Control Products Phone: [phone] E-mail: [email protected]
Sågmästaregatan 1D Fax: [phone] 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
___________________________________________________________________________________________________________
___________________________________________________________________________________________________________
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
___________________________________________________________________________________________________________

984M-
series Mar 07
Ventilation Control Products Phone: [phone] E-mail: [email protected]
Sågmästaregatan 1D Fax: [phone] Web: www.vcp.se
416 80 Göteborg, Sweden
Air Differential Pressure Transmitters
with 0-10 Vdc or 4-20 mA Output
Switch Display Step Information
Offset calibration
Current measured value
Re-calibration of offset
Show actual offset value
Store offset. Display blinking for confirmation
Setting switching level
Show actual switching level
Modify switching level
Store switching level. Display blinking for confirmation
Peak value high
Show peak value high
Return
Peak value low
Show peak value low
Return
Current measured value
Programming of 984M.3x3114 (the LED display version)
___________________________________________________________________________________________________________
___________________________________________________________________________________________________________

Mar 07
Ventilation Control Products Phone: [phone] E-mail: [email protected]
Sågmästaregatan 1D Fax: [phone] Web: www.vcp.se
416 80 Göteborg, Sweden
Air Differential Pressure Transmitters
with 0-10 Vdc or 4-20 mA Output
984M-
series
We reserve the right to make changes in our
products without any notice which may effect
the accuracy of the information contained in this leaflet.
Dimensions (mm)
__________________________________________________________________________________________________________
Type Pressure Pressure Overload Bursting Temperature
range 1 range 2capacity pressure error
_________________________________________________________________________________________________________
984M.323 0 to 100 Pa 0 to 250 Pa 20 kPa 40 kPa < ± 5 % of FS
984M.333 0 to 250 0 to 500 Pa 20 kPa 40 kPa < ± 5 % of FS
984M.343 0 to 500 Pa 0 to 1.000 Pa 20 kPa 40 kPa < ± 2.5 % of FS
984M.353 0 to 1 kPa 0 to 2.5 kPa 40 kPa 70 kPa < ± 1 % of FS
984M.373 0 to 5 kPa 0 to 10 kPa 60 kPa 120 kPa < ± 1 % of FS
984M.393 0 to 25 kPa 0 to 50 kPa 300 kPa 500 kPa < ± 1 % of FS
984M.3B3 0 to 100 kPa 0 to 250 kPa 1.2 MPa 2 MPa < ± 1 % of FS
__________________________________________________________________________________________________________
Pressure ranges
Dimensions of a plastic tube
with integrated mounting plate,
that is included to the
duct fixing kit.
Duct fixing kit includes:
2 plastic tubes with
integrated mounting plate
2 metres PVC hose and 4 screws.
Mounting and hose connection
Important:
When connecting and laying the hoses,
do not bend or damage them.
Hoses and hose connections that are not airtight cause
damage to the device or will give wrong measuring results.
Ø Inner < 5.5 mm for optimum clamping
Use hose clips from 25 kPa (250 mbar)
P1 = Positive pressure measurement
P2 = Vacuum measurement
P1 + P2 = Differential pressure measurement