Download 1400-104 Relative Humidity/Air Temperature - LI

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1400-104 Relative Humidity/Air
Temperature Sensor
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Installation Instructions
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The 1400-104 Relative Humidity/Air Temperature Sensor requires a 7-28 VDC input power source and has a signal conditioned voltage output of
0-1V = -40 °C to 60 °C for air temperature and 0-1V = 0-100% for relative humidity.
Mounting the Sensor in the 1400-201 Vented Instrument Enclosure
1.
2.
Remove the protective yellow cap from the sensor.
Secure the sensor in the mounting hole located in the center of the bottom of the instrument
enclosure with the two plastic retaining rings and set screws (Figure 1). Position the end of
the sensor so it is even with the bottom of the circular radiation shield under the enclosure.
Set screw
Interfacing to the LI-1400 Datalogger
1.
2.
3.
4.
5.
1400-201 Vented Instrument Enclosure
Retaining rings
Connect the brown wire (7-28 VDC power) to one of the two unregulated power supply
terminals (UNREG). This terminal supplies the power to the sensor.
Connect the blue wire (ground) to any ground (↓) terminal.
Connect the narrow gauge black wire (temperature voltage signal) to one of the voltage
signal channels (V1-4). Note that there is a second black wire, with a thicker shield, that
should be connected to any of the ground (↓) terminals on the terminal strip.
Connect the white wire (RH voltage signal) to one of the voltage signal channels (V1-4).
Secure the cable to the strain relief slots at the top of the terminal strip, if desired.
Humitter
Radiation shield
Figure 1. Align the end of the sensor with
the bottom of the radiation shield.
Configuring the LI-1400 Datalogger (Example)
Connect the black wire to V1 and the white wire to V2.
For temperature:
1.
2.
3.
4.
5.
6.
7.
Configure V1 channel as General for air temperature.
Enter a description, such as Air temp.
Set Math = Poly(nomial) and press Ent(er).
Set description as desired, a0 = -40, a1 = 100, a2-a5 = 0. When finished, press Esc to return to the main configuration list.
Set Oper(ator) = none.
Enter a Label such as C for the units.
Configure any remaining parameters as described in the LI-1400 Instruction Manual.
For relative humidity:
1.
2.
3.
4.
5.
6.
7.
Configure V2 channel as General for relative humidity.
Enter a description, such as RH.
Set Math = Poly(nomial) and press Ent(er).
Set a0 = 0, a1 = 100, a2-a5 = 0. When finished, press Esc to return to the main configuration list.
Set Oper(ator) = none.
Enter a Label such as RH for the units.
Configure any remaining parameters as described in the LI-1400 Instruction Manual.
Interfacing to the LI-1000 Datalogger
1.
2.
3.
4.
Connect the brown wire (7-28 VDC power) to C1 on the 1000-05 Terminal Block or P1-5 on the 1000-10 Thermocouple Block. These
terminals supply power to the sensor.
Connect the blue wire (ground) to any ground terminal.
Connect the black wire (temperature voltage signal) to one of the voltage signal channels such as A-3 on the 1000-05 Terminal Block or to one
of the large copper posts (such as channel 4) on the 1000-10 Thermocouple Block.
Connect the white wire (RH voltage signal) to one of the voltage signal channels such as A-4 on the 1000-05 Terminal Block or channel 5 on the
1000-10 Thermocouple Block.
(over)
Configuring the LI-1000 Datalogger (Example)
For air temperature:
For relative humidity:
1.
2.
3.
4.
5.
6.
1.
2.
3.
4.
5.
6.
Configure channel 3 as Gen(eral) and press ENTER.
Range = A.
Set a0 = -40, a1 = 10, a2-a5 = 0.
Math = OFF.
Enter a desired label such as C.
Configure remaining parameters as described in the
LI-1000 Instruction Manual.
Configure channel 4 as Gen(eral) and press ENTER.
Range = A.
Set a0 = 0, a1 = 10, a2-a5 = 0.
Math = OFF.
Enter a desired label such as RH.
Configure remaining parameters as described in the LI-1000 Instruction
Manual.
Recalibration
It is not necessary to send the 1400-104 sensor back to LI-COR for recalibration, as calibration of the RH sensor is done simply by replacing the
sensor element.
Specifications (HMP50)
Relative Humidity
Fig. 2. Temperature dependence
Measuring range
Operating range
Typical accuracy at +20 °C
0...90% RH
90...98% RH
Temperature dependence
Sensor
0...98 %RH
0...100 %RH
±3% RH
±5% RH
see Figure 2
Vaisala INTERCAP®
Temperature
Measuring range
Operating range
Typical accuracy at +20 °C
Sensor
-10...+60 °C
-40...+60 °C
±0.6 °C, see Figure 3
Pt 1000 IEC 751 class B
Fig. 3. Accuracy of temperature measurement
General
Output signal
Power supply
Current consumption
Operating temperature range
Storage temperature range
Operating humidity range
Sensor protection
option
Housing material
Housing classification
0...1 V
(equals 0...100 %RH and -40...+60 °C, i.e.,
10 mV equals one %RH or °C).
7...28 VDC
2 mA typical
-10...+60 °C
-40...+60 °C
0...100 %RH
membrane filter, part #DRW010525
plastic grid, part #DRW010522
ABS plastic
IP 65
1
2
3
4
brown
white
blue
black
+VDC 7...28VDC
0...1V 0...100% RH
-VDC
0...1V -40...+60 °C
INTERCAP® is a registered trademark of Vaisala. Specifications subject
to change without further notice.
®
LI-COR, inc. ● Environmental ● 4421 Superior Street ● P.O. Box 4425 ● Lincoln, NE 68504 USA
Phone: 402-467-3576 ● FAX: 402-467-2819
Toll-free 1-800-447-3576 (U.S. & Canada)
E-mail: [email protected]
www.licor.com
DLA117-10/07