LEFOO LFM110 Series Instruction sheet

Product Instructions
LEFOO INDUSTRIAL (HANGZHOU)CO.,LTD.
ADDφNO.118 Changda Road Yuhang economic Development
Zone,Hangzhou Zhejiang 311100,China
Telφ+86-571-89363666 Faxφ+86-571-89363678


LFM110 –LFM112
Differential Pressure Transmitter

Product Instructions
LEFOO INDUSTRIAL (HANGZHOU)CO.,LTD.
ADDφNO.118 Changda Road Yuhang economic Development
Zone,Hangzhou Zhejiang 311100,China
Telφ+86-571-89363666 Faxφ+86-571-89363678
Differential Pressure Transmitter
LFM110–LFM112
Products Features
This transmitter is apply to low differential pressure display and signal collection in HVAC, industrial equipment,
intelligent building, test bench and other fields.
lM110 Range˖-1,000Pa~1,000Pa ˄Minimum range from 0~100Pa˅
M112 Range˖-10,000Pa~10,000Pa˄Minimum range from 0~1,000Pa˅
Adjustable differential pressure range
lInput voltage˖16~30Vac/Vdc
lOutput signal˖0~10V and 4~20mA˄Both signals can be used at the same time˅
lUnit Of measurement: Pa,mmH2O,inWG,mmHG,daPa,KPa,hPa,mbar Various pressure units
lLCD backlit digital display
lAuto zero calibration when power on
lThe imported pressure core
lABS industrial plastic housing, IP 65
lHousing with simplified mounting systems
Specification
Range
LFM110
-1,000 ~ +1,000 Pa ( Minimum range from 0 ~ +100 Pa )
LF
M
112
-10,000 ~ +10,000Pa ( Minimum range from 0 ~
+1,000Pa )
Precision
±1.0% FS
P
ressure U
nit
LFM110 /
LFM112
Pa, mmH2O, mbar, inWG,
mmHG, daPa, KPa, hPa
Tolerated
Overpressure
LFM110
15,000Pa
LFM112
150,000Pa
Output signal
4 ~ 20 mA and 0 ~ 10 Vdc ( 2 signals available )
Power Supply
16 ~ 30 Vdc/Vac ( 2 wires )
24Vdc
adaptor power supply
220Vac
Power
Consumption
1.5W
Model Selection
-1,000~1,000Pa
-10,000~10,000Pa
LFM 11
Range
Housing
A
B
C
Transparent
Blue
Orange
0
2

Product Instructions
LEFOO INDUSTRIAL (HANGZHOU)CO.,LTD.
ADDφNO.118 Changda Road Yuhang economic Development
Zone,Hangzhou Zhejiang 311100,China
Telφ+86-571-89363666 Faxφ+86-571-89363678
Functions
Material: Industrial plasticˈfire resistance level
per UL94-V0.
Display: backlit digital display 50 x 22.5 mm
Digital Height˖Value 10 mm,Units 5 mm
Pressure Connection˖Ribbed Ø 6.2 mm
Cable Gland: For cables Ø 8 mm maximum
Weight˖140g
Response
Time
20ms
Resolution
1Pa,0.1mmH
2
O,0.01mbar,0.004inWG,
0.007mmHG,0.1daPa,0.001KPa,0.01hPa
Zero
Calibration
Manual with push button or automatic at
starting for zero calibration
Media
Air and neutral gases
Tolerated
Overpressure
15KPa
˄LFM110˅150KPa˄LFM112˅
Operating
Temperature
0~+60
ć
Storage
Temperature
-10~+70
ć
Housing Function
Details
Cable gland
Pressure connections
Power adaptor connection terminal
Autozero manual
PC connection
Output signal terminals
Power supply terminals
Lower switches
Upper switches

Product Instructions
LEFOO INDUSTRIAL (HANGZHOU)CO.,LTD.
ADDφNO.118 Changda Road Yuhang economic Development
Zone,Hangzhou Zhejiang 311100,China
Telφ+86-571-89363666 Faxφ+86-571-89363678
1. Display function
Display pressure range -1000Pa1000Pa,other display pressure unit available as Pa,mmH2O,inWG,mmHG,daPa,
KPa,hPa,mbarDŽ
2. Function settings
Precision calibration is through the circuit board by pushing the button. When the button activated, the sensor
will enter into the precision calibration status. Input the pressure supply to -1000Pa and push the button to save the
-1000Pa pressure value. Afterwards, by pressing quickly on the button, you can increment a value and scroll down the
different potion or values while by pressing on the button more than 3 seconds, you can validate the setting and go to
the next setting. Usually, we set the pressure range with professional machines and workers before shipment ,
customers are not encouraged to set the pressure.
3. Dial-up switch setting
Model
LFM
110
LFM
112
LFM
110
LFM
112
LFM
110
LFM
112
LFM
110
LFM
112
LFM
110
LFM
112
Pa
100
1,000
250
2,500
500
5,000
750
7,500
1,000
10,000
mmH2O
10.0
100.0
25.0
250.0
50.0
500.0
75.0
750.0
100.0
1,000.0
mbar
1
10.00
2.5
25.00
5.0
50.00
7.5
75.00
10.0
100.00
inWG
0.40
4.00
1.00
10.00
2.00
20.00
3.00
30.00
4.00
40.00
mmHG
0.75
7.50
1.87
18.75
3.750
37.50
5.62
56.20
7.50
75.00
daPa
10.0
100
25.0
250.0
50.0
500.0
75.0
750.0
100.0
1,000.0
KPa
0.100
1.00
0.250
2.50
0.500
5.00
0.750
7.50
1.000
10.00
hPa
1.00
10.00
2.50
25.00
5.00
50.00
7.50
75.00
10.00
100.00
To set a unit of measurement, put the 4,3,2 and 1 on-off switches as indicated in the table above (For example,
when the pressure range is 100Pa,the display will be 0-100Pa and with output signal as 4-20mA or 0-10V) The above
table shows the dial-up switch position in order to reach the desired pressure range .
Other pressure range are available according to customer’s requirements
Full range/ Central zero˄take 0~1,000Pa as an example˅
To set the type of measuring range, put the on-off switch as indicated below
Full range˖0~1,000Pa Central zero˖-500Pa~500Pa
Please follow carefully the combinations above the Dial-up switch. If the combination is wrongly done, the following message
will appear on the display as “Err”In that case, you have to unplug the transmitter, place the Dial-up switches correctly and
then power the transmitter up
4
3
2
1
4
3
2
1

Product Instructions
LEFOO INDUSTRIAL (HANGZHOU)CO.,LTD.
ADDφNO.118 Changda Road Yuhang economic Development
Zone,Hangzhou Zhejiang 311100,China
Telφ+86-571-89363666 Faxφ+86-571-89363678
To set a measurement unit, put the on-off switch 3,2 and 1of the units as shown in the table below
Configuratio
n
Pa
mmH2
O
mbar
inWG
mmHG
daPa
KPa
hPa
Combi
nation
4
3
2
1
Push the button 1 to start or stop the autozero powering up
Stop the autozero in starting up Start the autozero in powering up
4. Autozero Manual
Press the autozero manual button will zero the data and save the zero point
Electrical connection
1- Vac/Vdc Positive˗
2- Vac/Vdc Negative˗
3- GND˗
4- V_out˗
5- GND˗
6- I_out˗
Mounting
To mount the transmitter, mount the ABS plate
on the wall(drilling: Ø6mm,screws and pins are
supplied)
Insert the transmitter on the fixing plate(see A
on the drawing)
Rotate the housing in clockwise direction until
you hear a ‘click’ which confirms that the
transmitter is correctly installed. Once the trans
-mitteris installed and powered up, please make
autozero.
ƻ
V
0~10Vdc
- +
+ -
- +
1 2 3 4 5 6
16~30Vac/Vdc
ƻ
A
4~20mA
4
3
2
1

Product Instructions
LEFOO INDUSTRIAL (HANGZHOU)CO.,LTD.
ADDφNO.118 Changda Road Yuhang economic Development
Zone,Hangzhou Zhejiang 311100,China
Telφ+86-571-89363666 Faxφ+86-571-89363678
Maintenance
Please avoid any aggressive solvent and protect the transmitter and its probes from any cleaning product contain
-ing formalin,that may be used for cleaning rooms and ducts.
Chargeable Accessories
·Power adapter
·Connection tube