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| 型號(hào)： | DS1923 |
| 英文描述： | Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| 文件頁數(shù)： | 4/52頁 |
| 文件大小： | 495K |
| 代理商： | DS1923 |
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DS1923: Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory
For software corrected accuracy, assume correction using calibration coefficients with calibration equations for error
compensation.
at: http://www.ibutton.com. beverages, pharmaceuticals, medications, blood and blood products, organs, flammable, and combustible products. User shall
assure that redundant (or other primary) methods of testing and determining the handling methods, quality, and fitness of the
articles and products should be implemented. Temperature and/or humidity tracking with this product, where the health or safety
of the aforementioned persons or things could be adversely affected, is only recommended when supplemental or redundant
information sources are used. Data logger products are 100% tested and calibrated at time of manufacture by Dallas
Semiconductor/Maxim to ensure that they meet all data sheet parameters, including temperature accuracy. User shall be
responsible for proper use and storage of this product. As with any sensor-based product, user shall also be responsible for
occasionally rechecking the temperature accuracy of the product to ensure it is still operating properly.
Response time is determined by measuring the 1/e point as the device transitions from 40 to 90%RH or 90 to 40%RH, whichever
is slower. Test was performed at 5L/min airflow.
All DS1923 humidity measurements are 12-bit readings. Missioning determines 8-bit or 16-bit data logging. Battery lifetime is the
same no matter what RH resolution is logged.
Reliability studies have shown that the device survives a minimum of 1000 cycles of condensation and drying, but this product is
not guaranteed for extended use in condensing environments.
Software corrected accuracy is accomplished using the method detailed in the
Software Correction Algorithm for Temperature
section of this data sheet.
Every DS1923 Device is measured and calibrated in a controlled, NIST-traceable RH environment.
Higher accuracy versions may be available. Contact the factory for details.
If this device is exposed to a high humidity environment (>70%RH), and then exposed to a lower RH environment, the device will
read high for a period of time. The device will typically read within +0.5%RH at 20%RH, 30 minutes after being exposed to
continuous 80%RH for 30 minutes.
All capacitive RH sensors can change their reading depending upon how long they have spent at high (>70%RH) or low RH
(<20%RH). This effect is called saturation drift and can be compensated through software, as described in the
Software
Saturation Drift Compensation
section of this data sheet.
Individual RH readings always include a noise component (repeatability). To minimize measurement error, average as many
samples as is reasonable.
Like all relative humidity sensors, when exposed to contaminants and/or conditions toward the limits of the safe operating range,
accuracy degradation can result (see
Safe Operating Range
chart). For maximum long-term stability, the sensor should not be
exposed or subjected to organic solvents, corrosive agents (strong acids, SO
, H
SO
, CI
,HCL, H
S, etc.) and strong bases
(compounds with PH greater than 7). Dust settling on the filter surface does not affect the sensor performance except to possibly
decrease the speed of response.
For more information on the RH sensor’s tolerance to chemicals visit:
http://content.honeywell.com/sensing/prodinfo/humiditymoisture/technical/c15_144.pdf
All humidity specifications are determined at +25°C except where specifically indicated.
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Standard Values
DS1923 Values
Parameter
Name
t
SLOT
(incl. t
REC
)
t
RSTL
t
PDH
t
PDL
t
W0L
Standard Speed
Min
61μs
480μs
15μs
60μs
60μs
Overdrive Speed
Min
7μs
48μs
2μs
8μs
6μs
Standard Speed
Min
65μs
1)
690μs
15μs
60μs
60μs
Overdrive Speed
Min
9.5μs
70μs
2μs
7μs
7.5μs
Max
(undef.)
(undef.)
60μs
240μs
120μs
Max
(undef.)
80μs
6μs
24μs
16μs
Max
(undef.)
720μs
63.5μs
287μs
120μs
Max
(undef.)
80μs
7μs
28μs
12μs
1)
Intentional change, longer recovery time requirement due to modified 1-Wire front end.
PHYSICAL SPECIFICATION
Size
Weight
Safety
See mechanical drawing
Ca. 5.0 grams
Meets UL#913 (4
th
Edit.); Intrinsically Safe Apparatus,
approval under Entity Concept for use in Class I,
Division 1, Group A, B, C, and D Locations (application
pending)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1923-F5 | Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| DS1990 | Serial Number iButton |
| DS1990A | Serial Number iButton |
| DS1990A-F5 | Serial Number iButton |
| DS1994L-F5 | 4kb Plus Time Memory iButton |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1923_1 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| DS1923_11 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Hygrochron Temperature/Humidity Logger |
| DS1923-F5 | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5# | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5#W | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
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