DIFFERENTIAL PRESSURE TRANSMITTERS 0…2.

5 BAR 984

FUNCTION

Monitoring differential gaseous pressure, non-aggressive Each transmitter can be set with two pressure ranges using
media. Possible areas of applications are: the jumper “Range”. The factory setting is for range 1 (jumper
- air-conditioning and clean rooms; inserted). To choose range 2, remove the jumper.
- building automation; The response time of output signal can be configured. The
- valve and flap control; factory setting is for slow response 1 s (useful for suppressing
- fluid and level monitoring; pressure peaks), jumper “Response inserted”. To increase fast
- control of air flows. response remove the jumper.
Transduction in voltage and current values. The output level of 3- wire models can be configured in 0...10
Vdc (factory setting, jumper “Output” inserted) or 4...20 mA by
removing this jumper.
TECHNICAL DATA

Power supply: see order selection table Working temp.: 0...+50 °C

Sensor: piezoresistive pressure transducer Storage: -10...+70 °C
Measuring range: see order selection table Humidity: 0...95 % r.h.,without condensing
Overload: see order selection table Response time: 100 ms or 1 sec., selectable
Rupture press.: see order selection table Housing: housing with process connection P2
Accuracy: < ± 0,2 % of end of scale made of ABS, mounting part with
Typical long process connection P1 made of POM
term stability: < ± 0,5 % to ± 2,5 % of end of scale/year Installation: can be mounted in any position
Outputs / load: 0...10 Vdc (max 10 mA) Protection: IP54 (with cover), class I
4...20 mA < 20...500 Ohm Standards: EN60770, EN61326
Supply current: max 30 mA for AC (0...10 Vdc), Max dimensions: Ø 118 x h 57,5 mm
max 20 mA for DC (0...10 Vdc), Weight: 170 g
max 30 mA (4...20 mA) for 2-, 3- wire

TYPE RANGE 1 RANGE 2 OUTPUT SIGNAL DISPLAY

984M.323204 0...100 Pa (1.0 mbar) 0...250 Pa (2.5 mbar) 4...20 mA No
984M.343304 0...500 Pa (5.0 mbar) 0...1.000 Pa (10 mbar) 4...20 mA No
984M.343714 0...500 Pa (5.0 mbar) 0...1.000 Pa (10 mbar) 0...10 Vdc Yes
984M.353704 0...1 kPa (10 mbar) 0...2.5 kPa (25 mbar) 0...10 Vdc No
984M.353D04 0...1 kPa (10 mbar) 0...2.5 kPa (25 mbar) 4...20 mA No
For other models see the list below:

984M.3 X 3 X X 4

Pressure ranges (Pa):

Range 1 Range 2 overload max
0...100 Pa (1.0 mbar) 0...250 Pa (2.5 mbar) 20 kPa 2
0...250 Pa (2.5 mbar) 0...500 Pa (5.0 mbar) 20 kPa 3
0...500 Pa (5.0 mbar) 0...1.000 Pa (10 mbar) 20 kPa 4
0...1 kPa (10 mbar) 0...2.5 kPa (25 mbar) 40 kPa 5
0...5 kPa (50 mbar) 0...10 kPa (100 mbar) 60 kPa 7
0...25kPa (250 mbar) 0...50 kPa (500 mbar) 300 kPa 9
0...100 kPa (1000 mbar) 0...250 kPa (2500 mbar) 1.2 MPa B
-50Pa...+50Pa (-0,5mbar...+0,5mbar) x
Pressure unit Pascal
Outputs and power supply
0…10 Vdc 24 Vac/dc, with open collector NPN output, 3- wire cable 1
4…20 mA 24 Vdc, without open collector NPN output, 2- wire cable 2
4…20 mA 24 Vac/dc, with open collector NPN output, 3- wire cable 3
0…10 Vdc 24 Vac/dc, without open collector NPN output, 3- wire cable 7
4…20 mA 24 Vac/dc, without open collector NPN output, 3- wire cable D
Display
None 0
with LED-display, 3.5 digits (not for output 4...20 mA, 2 wires) 1
Electrical connections
Screw terminal block
Accessories on request
Connection set DBZ-06
Mounting bracket DBZ-14A
Mounting bracket DBZ-14B
Test certificate 104552

1
DIFFERENTIAL PRESSURE TRANSMITTERS 0…2.5 BAR 984

WIRING DIAGRAM
984M.3x31x4 984M.3x32x4 984M.3x33x4
984M.3x37x4 984M.3x3Dx4

Load 4 4 Load
4
3 3 3
4 …2 0 mA 2 Load 0…10 V 2 Load
0…10 V 2 Load
4 . . . 2 0 mA 4 . . . 2 0 mA
1 8 …2 4 …3 0 Vac 1 8 …2 4 …3 0 Vac
1 6 …2 4 …3 2 Vdc 1 1 5 . . . 2 4 . . . 3 0 Vdc 1 1 6 …2 4 …3 2 Vdc 1

4 SA Switching output, npn 4 4 SA Switching output, npn

3 GO G round G N D 3 3 GO G round G N D
2 Y O utput signal 0 … 1 0 V / 4 . . . 2 0 mA 2 Y O utput signal 4 … 2 0 mA 2 Y O utput signal 0 … 1 0 V / 4 . . . 2 0 mA
1 G Supply voltage 2 4 VAC / VDC 1 G Supply voltage 2 4 VDC 1 G Supply voltage 2 4 VAC / VDC

Range 1 Range 2 positive pressure measurement

slow fast depression measurement
* linear square root differential pressure measurement

* Only for 3-wire model without display and only on request.

VERSION WITHOUT DISPLAY VERSION WITH DISPLAY

Setting of switching output: Commutation point setting:

Apply a differential pressure corresponding to the transistor commu- Press the key “M” two times, the message “SP” appears on display.
tation point required. Then press the key “Switching output” for 5 s Press the key “S” to visualize the current point of commutation.
until led flashes (= value is saved). The led lights when the pressure To change the point of commutation value press the key “S” for 5
set is reached of exceeded. seconds then press the key “M” to memorize it.
Press the key “M” several times until the measured value appears
on the display.
Offset calibration:

In order to correct zero-point deviation of output signal in depressu- Offset calibration:

rized state (ex: to 0 Vdc/ 4 mA at 0 Pa), disconnect the unit from pres-
sure by opening both hoses, then press the “Offset” button for 5 s. Press the key “M” two times, the message “OFFS” appears on display.
Press the key “S” one time to see the current value of Offset.
To change Offset value press the key “S” for 5 seconds then press
the key “M” to memorize it.
Press the key “M” several times until the measured value appears
on display.

2
 54,5
Ø4.5

83,5
5.5

12.5
Ø3.4

161,5
50,4

175
DIMENSIONS (mm)

55 18 70.5
1 9

x4 spigoli
Ø4.5

0.5 x45°
1 1 20.5

Ø4 80 Ø4
Ø5

60

60
60

Ø4 Ø4
Ø10 Ø5
Ø4 Ø4

5
50,5

45

Ø4.5
55

10
1
20.5
1

70.5
17

50,4
DBZ-14A

5
55 18 70
Ø4.5 20.5
1 1

Ø4
Ø5

Ø6
60

Ø4
Ø10 Ø5
Ø4
18,5

Ø4.5
55

1
20.5
1
60

70
17

DBZ-14B

Ø6,5