mecair DPS User manual

Digital differential Pressure switch
Instruction manual
Digital differential Pressure switch
Model “DPS”
Instruction manual
Digital differential Pressure switch

1
DIGITAL DIFFERENTIAL PRESSURE SWITCH
MODEL “DPS”
INDEX
1.
TECHNICAL DATA TABLE Page 1
2. ELECTRICAL CONNECTIONS Page 2
3. FUSES Page 3
4. PNEUMATIC CONNECTIONS Page 3
5. BOARD PANELS AND CONTROLS Page 4
6. START UP Page 4
7.
8. CONFIGURATION
4 -20 mA Page 5 Page 7
9. TROUBLESHOOTING Page 7
ATTENTION: before using the product, carefully read this instruction manual in order to acquire a
sufficient knowledge of the product itself.
1. TECHNICAL DATA TABLE
Technical data
Power supply 115 - 230 V AC 50/60 Hz ±10%
Upon request 24 – 48 V 50/60 Hz AC ±10%
Fuse main 230 V = 100 mA T ; 115 V = 250 mA T
24 V = 630 mA T; 48 V = 315 mA T
Temperature Storage -20°C/+80°C
Operation -10°C/+50°C
Power 3,5 W @ 230 V
Measuring range 0 – 10 kPa
Unit kPa; mmH2O; “H2O; mBAR; Inc
“H2O = measurement in inches with decimals notation
Inc = measurement in inches with English notation ( 3” 3/8 )
Linearity ± 0,25% of Full Scale
Available languages Italian; English; French; German; Spanish
Output 4-20mA Active or passive, selection through a jumper
Supplied in active mode
Relays contacts 5 A 230 V non inductive
Case protection
Box Version
DIN Version from panel board
IP64
IP54 o IP65 with front transparent cover
Dimensions
Box Version
DIN Version from panel board
150 X 225 h 80
140 X 130 h 70
Weight
Box Version
DIN Version from panel board
1,100 Kg
0,750 Kg

•
Do not expose directly to the sun in order to avoid uncontrolled temperatures to
the circuits.
•
Protect against rain, water infiltrations and moist.
•
Do not install on vibrating walls.
•
Use only cable gland with
to the cable used )
•
It is compulsory to install downstream the power supply line a circuit breaker
located closed to it and identified as the knife switch of the device
•
Before opening the unit, be
disconnected
•
Do not attempt to repair the instrument, but contact MECAIR!
•
All the wiring must be carried out by
electric shock or fire.
•
All electrical connections must follow different paths vs all the other uses.
WEEE
This instrument must be disposed of as special industrial waste according to the
existing norms
N.B.:
The numbers and the letters within square brackets […]
drawings.
2.
ELECTRICAL CONNECTIONS
It is compulsory to install downstream the power supply line a circuit breaker located closed to it and
identified as the knife switch of the device
1)
Connect the power supply to the terminal
Neutral
115 V AC 50/60 Hz
230 V AC 50/60 Hz
2)
Connect
any equipment to the set relay terminal
Normallly open
Normally closed
Common
3)
Connect any audio/
visible signals to the alarm relay terminal
Normallly open
Normally closed
Common
4)
Output 4-20mA
[
G
]
+
-
2
Do not expose directly to the sun in order to avoid uncontrolled temperatures to
the circuits.
Protect against rain, water infiltrations and moist.
Do not install on vibrating walls.
Use only cable gland with
protection grade IP65 and of proper size ( according
to the cable used )
It is compulsory to install downstream the power supply line a circuit breaker
located closed to it and identified as the knife switch of the device
Before opening the unit, be
sure that
unit is switched off
disconnected
, including connection to alarm / signal relays .
Do not attempt to repair the instrument, but contact MECAIR!
All the wiring must be carried out by
skilled people
electric shock or fire.
All electrical connections must follow different paths vs all the other uses.
This instrument must be disposed of as special industrial waste according to the
The numbers and the letters within square brackets […]
indicate the positions on the
ELECTRICAL CONNECTIONS
It is compulsory to install downstream the power supply line a circuit breaker located closed to it and
identified as the knife switch of the device
Connect the power supply to the terminal
[ C ]
any equipment to the set relay terminal
[ D ]
visible signals to the alarm relay terminal
[ E ]
(flashing light, siren
Do not expose directly to the sun in order to avoid uncontrolled temperatures to
protection grade IP65 and of proper size ( according
It is compulsory to install downstream the power supply line a circuit breaker
located closed to it and identified as the knife switch of the device
unit is switched off
and wires on clamps
, including connection to alarm / signal relays .
Do not attempt to repair the instrument, but contact MECAIR!
to prevent any risks of
All electrical connections must follow different paths vs all the other uses.
This instrument must be disposed of as special industrial waste according to the
indicate the positions on the
It is compulsory to install downstream the power supply line a circuit breaker located closed to it and
(flashing light, siren
)

3
A
B
F
C
G
D
E
N.O. N.C.
COM
N.O. N.C.
COM
N.C. 4-20mA+
4-20mA-
0V 115VAC
230VAC
Contact shown are without power supply
3. FUSES
Name Dimensions Value Type Drawing Description
F1 5 x 20 100 mA T [ A ] Supply mains 230 V
F2 5 x 20 250 mA T [ B ] Supply mains 115 V
F1 5 x 20 630 mA T [ A ] Supply mains 24 V
F2 5 x 20 315 mA T [ B ] Supply mains 48 V
In case of replacement, it is compulsory to respect the value indicated on the table
4. PNEUMATIC CONNECTIONS
The instruments is supplied with two filtering taps to be used to connect the instrument and the areas to be
measured.
Use a 4/6 rilsan hose.

4
5. BOARD PANELS AND CONTROLS
1 Display Displays Delta-P value, the setting and the messages
2 Enter key Allows to enter the menu items, and to confirm data after modifications
3 + key
Increases the datum to be modified or changes options in the menu items. Displays
the alarm messages
4 - key Decreases the datum to be modified or
changes options in the menu items. Cancels
the alarm messages
5 Esc key Allows to exit the menu pages
6 Set Led Switches on when the set value “Set” is exceeded
7 Alarm Led Switches on in case of alarm.
Possible alarms are:
the set “Alarm” value is exceeded
sensor failure
invalid configuration data
8 Model DP Super 5 languages
5 units
Min-max Delta-P Set
1 alarm set
Hour counter
6. START UP
Connect the instrument to the power supply.
ENTERESC

5
When switching the unit on, the display [ 1 ] indicates the model followed by the equipment version; after 3
seconds, it will display the pressure value.
7. CONFIGURATION
To enter the configuration menu, press “Enter” key [ 2 ]
Press “+” key [ 3 ] to move to the following menu, “-“ [ 4 ] to move to the previous menu.
Press “Esc” key [ 5 ] to go back to the pressure value display.
Language selection Select one of the 5 programmed languages
Press “Enter” [ 2 ] to display the selected language
By pressing either “+” [ 3 ] or “-“ [ 4 ] it is possible to select a language among
the 5 available ones (ITALIAN; ENGLISH; FRANCAIS; DEUTSCH;
ESPANOL)
Press “Enter” [ 2 ] to go back to the menu after changing the setting.
Press “Esc” [ 5 ] to go back to the pressure value display
Unit Select one of the 5 available units
Press “Enter” [ 2 ] to display the selected unit
By pressing either “+” [ 3 ] or “-“ [ 4 ] it is possible to select a unit among the 5
available ones (kPa; mmH2O; “H2O; mBAR; inc)
Press “Enter” [ 2 ] to go back to the menu after changing the setting.
Press “Esc” [ 5 ] to go back to the pressure value display
Minimum value input Minimum value below which the Set relay re-opens. Led [ 6 ] off
Press “Enter” [ 2 ] to display the current value
By pressing either “+” [ 3 ] or “-“ [ 4 ] the parameter value is either increased or
decreased (an extended pressure increases the parameter switch speed)
Press “Enter” [ 2 ] to go back to the parameter selection menu after changing the
parameter value itself.
Press “Esc” [ 5 ] to go back to the pressure value display
Maximum value input Maximum value above which the Set relay closes. Led [ 6 ] on
Press “Enter” [ 2 ] to display the current value
By pressing either “+” [ 3 ] or “-“ [ 4 ] the parameter value is either increased or
decreased (an extended pressure increases the parameter switch speed)
Press “Enter” [ 2 ] to go back to the parameter selection menu after changing the
parameter value itself.
Press “Esc” [ 5 ] to go back to the pressure value display
Alarm value input Value above which the alarm relay closes. Led [ 7 ] on
Press “Enter” [ 2 ] to display the current value
By pressing either “+” [ 3 ] or “-“ [ 4 ] the parameter value is either increased or
decreased (an extended pressure increases the parameter switch speed)
Press “Enter” [ 2 ] to go back to the parameter selection menu after changing the
parameter value itself.
Press “Esc” [ 5 ] to go back to the pressure value display
Pressure delay
from 0 to 25 Sec with
second decimals
adjustment
Exceeding switching limit minimum time
(pressure fluctuations for times shorter than that are ignored )
Press “Enter” [ 2 ] to display the current value
By pressing either “+” [ 3 ] or “-“ [ 4 ] the parameter value is either increased or
decreased (an extended pressure increases the parameter switch speed)
Press “Enter” [ 2 ] to go back to the parameter selection menu after changing the
parameter value itself.
Press “Esc” [ 5 ] to go back to the pressure value display

6
4-20 mA Full Scale Value from 1 to 10 that allows to select the maximum pressure value
corresponding to 20 mA
Press “Enter” [ 2 ] to display the current value
By pressing either “+” [ 3 ] or “-“ [ 4 ] the parameter value is either increased or
decreased (an extended pressure increases the parameter switch speed)
Press “Enter” [ 2 ] to go back to the parameter selection menu after changing the
parameter value itself.
Press “Esc” [ 5 ] to go back to the pressure value display
4 mA adjustment 4 mA calibration
Press “Enter” [ 2 ] to display the current value of the adjusting datum, the 4-20
mA output emits a signal corresponding to 4 mA.
By pressing either “+” [ 3 ] or “-“ [ 4 ] the parameter value is either increased or
decreased and therefore the output value is changed; adjust till the displayed
value on the external instrument indicates the correct value 4 mA
Press “Enter” [ 2 ] to go back to the parameter selection menu after changing the
parameter value itself.
Press “Esc” [ 5 ] to go back to the pressure value display
20 mA adjustment 20 mA calibration
Press “Enter” [ 2 ] to display the current value of the adjusting datum, the 4-20
mA output emits a signal corresponding to 20 mA.
By pressing either “+” [ 3 ] or “-“ [ 4 ] the parameter value is either increased or
decreased and therefore the output value is changed; adjust till the displayed
value on the external instrument indicates the correct value 20 mA
Press “Enter” [ 2 ] to go back to the parameter selection menu after changing the
parameter value itself.
Press “Esc” [ 5 ] to go back to the pressure value display
Zero pressure Sensor Zero setting
Disconnect the hoses from the filtering taps before carrying out the Zero setting.
Press “Enter” [ 2 ] to display the current pressure value
By pressing “+” [ 3 ] the sensor is set to Zero and the Zero value is saved
Press “Enter” [ 2 to go back to the parameter selection menu after changing the
parameter value itself.
Press “Esc” [ 5 ] to go back to the pressure value display
Connect the hoses to the filtering taps
LCD Contrast To ad just the display contrast (0-63)
Press “Enter” [ 2 ] to display the current value of the parameter that adjusts the
display contrast (0-63)
By pressing either “+” [ 3 ] or “-“ [ 4 ] the parameter value is either increased or
decreased and the adjustment effects are visible on the display
Press “Enter” [ 2 to go back to the parameter selection menu after changing the
parameter value itself.
Press “Esc” [ 5 ] to go back to the pressure value display
Hour counter xxxxx Displays the operating hours (Max 99.999; cannot be modified)
Press “Esc” [ 5 ] to go back to the pressure value display

7
8. 4 -20 mA
It is possibile to select the 4-20 output in either active or passive modes.
Active: does not requie any external feeder.
Passive: it requires an external power supply between 18 / 24 V DC.
Move the two jumpers on the 4-20mA card [ F ] to select either the active or the passive mode.
The instrument is supplied in active mode.
9. TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
The display does not
switch on Lack of power supply Check fuses F1
[ A ]
or F2
[ B
]
Check mains connections [ C ]
Pressure value is not
correct Disconnect the hoses from the pressure taps.
If the value is not zero, carry out a
Zero setting.
Reset the pressure value, refer to the
“Zero Pressure” item in the menu
The value transmitted
by the 4-20 mA is not
correct or is lacking
Wrong parameter adjustments
Wrong active/passive mode selection
Input correct parameters, see menu:
Full Scale 4-20
4 mA adjustment
20 mA adjustment
Check the jumper position on the 4-20
mA card [ F ]

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