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參數(shù)資料
| 型號(hào)： | SHT15 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Humidity & Temperature Sensor |
| 中文描述： | 濕度 |
| 文件頁(yè)數(shù)： | 5/9頁(yè) |
| 文件大小： | 840K |
| 代理商： | SHT15 |
SHT1x / SHT7x Relative Humidity & Temperature Sensor System
www.sensirion.com
v2.02 July 2004
5/9
3 Converting Output to Physical Values
3.1 Relative Humidity
To compensate for the non-linearity of the humidity sensor
and to obtain the full accuracy it is recommended to convert
the readout with the following formula
1
:
c
SO
c
c
RH
+
+
=
2
RH
3
c
2
RH
2
1
linear
SO
RH
12 bit
8 bit
Table 6
SO
c
1
-4
-4
c
3
0.0405
0.648
-2.8 * 10
-6
-7.2 * 10
-4
Humidity conversion coefficients
For simplified, less computation intense conversion formulas
see application note “RH and Temperature Non-Linearity
Compensation”.
The humidity sensor has no significant voltage dependency.
Figure 10
Conversion from SO
RH
to relative humidity
3.1.1 Humdity Sensor RH/Temperature compensation
For temperatures significantly different from 25 °C (~77 °F)
the temperature coefficient of the RH sensor should be
considered:
SO
t
(t
25)
(T
RH
+
=
°
SO
RH
t
1
t
2
12 bit
0.01
0.00008
8 bit
0.01
0.00128
Table 7
Temperature compensation coefficients
linear
RH
2
1
C
true
RH
)
+
This equals ~0.12 %RH / °C @ 50 %RH
1
Where SO
RH
is the sensor output for relative humidity
3.2 Temperature
The bandgap PTAT (Proportional To Absolute Temperature)
temperature sensor is very linear by design. Use the
following formula to convert from digital readout to
temperature:
SO
d
d
Temperatur
+
=
T
2
1
d
1
[°F]
-40.00
-39.50
-39.35
-39.28
-39.23
VDD
5V
4V
3.5V
3V
2.5V
Table 8
d
1
[°C]
-40.00
-39.75
-39.66
-39.60
-39.55
Temperature conversion coefficients
SO
T
14bit
12bit
d
2
[°C]
0.01
0.04
d
2
[°F]
0.018
0.072
For improved accuracies in extreme temperatures with more
computation intense conversion formulas see application
note “RH and Temperature Non-Linearity Compensation”.
3.3 Dewpoint
Since humidity and temperature are both measured on the
same monolithic chip, the SHTxx allows superb dewpoint
measurements. See application note “Dewpoint calculation”
for more.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SHT71 | Humidity & Temperature Sensor |
| SHT75 | Humidity & Temperature Sensor |
| SI-10022 | SI-10022 |
| SI-16001 | SI-16001 |
| SI-3150C | Plug-In Relay; Contacts:6PST-4NO/2NC; Coil Voltage DC Max:125V; Contact Carry Current:10A; Coil Resistance:6200ohm; Relay Options:Polycarbonage Covers; Relay Mounting:Plug-In; Leaded Process Compatible:No; Mounting Type:Plug In |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SHT15 | 制造商:Sensirion 功能描述:SENSOR HUMIDITY HIGH ACCURACY |
| SHT15 | 制造商:Sensirion 功能描述:HUMIDITY SENSOR |
| SHT1-500C075DE | 功能描述:線繞電阻器 - 底架安裝 500 AMP SHUNT 75 mV RoHS:否 制造商:Vishay/Dale 電阻:7 Ohms 容差:1 % 功率額定值:100 W 溫度系數(shù):50 PPM / C 系列:RH 工作溫度范圍:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封裝:Bulk 產(chǎn)品:Power Resistors Wirewound Aluminum Housed |
| SHT18R | 制造商:HellermannTyton 功能描述: |
| SHT18R-HS | 制造商:HellermannTyton 功能描述: |
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