DS9108-8 [MAXIM]
Concrete Temperature Monitor; 混凝土温度监控
| 型号： | DS9108-8 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Concrete Temperature Monitor |
| 文件： | 总3页 (文件大小：61K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DS9108
Concrete Temperature
Monitor
www.maxim-ic.com
GENERAL DESCRIPTION
FEATURES
This product is a sealed plastic stick containing three
DS1921G iButtons®. The iButtons are connected in
parallel through metal plates that are spot-welded to
the IO and GND contact, respectively. Two stranded
wires protruding from the top end of the stick allow
for a 1-Wire® reader/write to make contact to the
iButtons for setup and data retrieval. Electrically, the
product is specified by the DS1921G data sheet, with
the proper scaling (e.g., current ×3, capacitance ×3).
The mechanical and thermal characteristics of the
module are specified in this document.
Three DS1921G networked to monitor temperate
at the top, bottom and center of the stick
Connects to 1-Wire reader/writer through color-
coded 18 AWG (1 mm Ø) stranded wires with ½
inch (1.3 cm) stripped ends
Electrically compatible to the DS1921G
Thermochron iButton (3 in parallel)
Sealed against liquid intrusion
Module position information stored in DS1921G
memory
APPLICATIONS
ORDERING INFORMATION
Concrete Maturity Monitoring
PART
TEMP RANGE
-20°C to 65°C
-20°C to 65°C
-20°C to 65°C
-20°C to 65°C
PIN-PACKAGE
8” (20.3 cm) depth*
10” (25.4 cm) depth
12” (30.5 cm) depth
15” (38.1 cm) depth
DS9108-8#
DS9108-10#
DS9108-12#
DS9108-15#
Shipped in bulk with the wires bundled with a tie
* Indicates depth of concrete to monitor, actual stick
length is 0.25” (0.6 cm) less then depth
TYPICAL OPERATING CIRCUIT
BLOCK DIAGRAM
Metal plates welded
to iButtons
Stranded wire
Ends twisted
VCC
RPUP
*
U1
U2
U3
IO
Red
wire
DS1921G
#3
BOTTOM
DS1921G
#2
MIDDLE
DS1921G
#1
TOP
Temperature
Monitor
Portable
1-Wire
reader
GND
Black
wire
IO
GND
Red
Transition wire to
metal plate
Black
* See Application Note 3829 for Rpup resistor size selection.
iButton and 1-Wire are registered trademarks of Dallas
Semiconductor.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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REV: 102106
DS9108 Concrete Temperature Module
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground
Operating Temperature Range
See DS1921G Datasheet
-4°F to 149°F (-20°C to +65°C)
See DS1921G Datasheet
Storage Temperature Range
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.
SPECIFICATIONS
(See DS1921G datasheet, TA = -4°F to 149°F (-20°C to +65°C) (Note 1))
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ounces
grams
2.5
72
Weight
Physical Dimensions
Wire Length
See technical drawing
12.9
32.8
10
13.1
33.3
inches
cm
lbf
Tensile Strength of Wires
Thermal Response Time
44.5
Newton
s
(Note 2)
500
Note 1: Assembled module production tested at 77°F (25°C).
Note 2: Response time in water is the time required for the recorded value to read 63% of the temperature’s real variation.
Material: PVC with PVC cement and E-60NC black Hysol epoxy for wire sealant
PIN DESCRIPTION
PIN
NAME
FUNCTION
Red Wire
Black Wire
IO
GND
1-Wire bus interface. Open drain, requires external pull-up resistor.
Ground Reference
iButton LOCATION WITHIN MODULE
Each DS1921G in the DS9108 module contains a memory tag marker to indicate its position in the assembly. The
position mark is a CRC16 validated packet starting on page 15 in the user memory. The memory image for ‘TOP’,
‘MIDDLE’, and ‘BOTTOM’:
Table 1. Memory Tag Description
CONTENTS
TAG TYPE
TOP
MIDDLE
BOTTOM
ADDRESS
DESCRIPTION
(HEX)
01 54 FA 60
01 4D 3B AA
01 42 7B AE
‘T’ in a CRC validated packet
‘M’ in a CRC validated packet
‘B’ in a CRC validated packet
1E0h–1E3h
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DS9108 Concrete Temperature Module
TYPICAL OPERATING CHARACTERISTICS
The module is inserted into wet concrete with the top approximately 0.25 inches (0.6 cm) below the surface. The
wires are draped on the surface for later data retrieval.
Concrete Surface
0.25
PACKAGE INFORMATION
0.20 (0.5)
L
0.63 (1.6)
1.10 (2.8)
Bottom iButton
Middle iButton
Top iButton
M
T
B
Concrete Depth
L
B
M
T
8 (20.3)
10 (25.4)
12 (30.5)
15 (38.1)
7.75 (19.7)
9.75 (24.8)
11.75 (29.8)
14.75 (37.5)
.60 (1.5)
.60 (1.5)
.60 (1.5)
.60 (1.5)
3.88 (9.9)
4.88 (12.4)
5.88 (14.9)
7.38 (18.7)
.60 (1.5)
.60 (1.5)
.60 (1.5)
.60 (1.5)
Inches (centimeters)
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