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參數(shù)資料
| 型號： | 19218 |
| 廠商： | Desco |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 0K |
| 描述： | MONITOR WORKSTATION JEWEL MINI |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | Jewel® |
| 類型： | 工作站監(jiān)視器 |
| 使用： | 工作面，腕帶監(jiān)視 |
| 特點(diǎn)： | 連續(xù)監(jiān)視，NIST 可追溯，停放按扣，單芯系統(tǒng) |
| 電源類型： | AC 適配器 |
| 包括： | AC 適配器，證書，推壓鉚緊（2） |
| 其它名稱： | 16-1161 19218-ND Q6711816 |
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 (909) 627-8178
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 (781) 821-8370 Website: Desco.com
TB-3050 Page 2 of 4
2014 DESCO INDUSTRIES, INC.
Employee Owned
Wave distortion technology can be referred to as “vector
impedance monitoring”. This description is valid as the
wave distortion technology measures the impedance
at the monitored banana jack and looks for changes in
either the capacitance or resistance of the circuit which
includes the wrist strap and its wearer. It uses filtering
and time domain sampling to filter out false signals
caused by voltage offsets, 60 Hz fields and other electro-
magnetic and electrostatic interference.
In normal factory environments, and with persons whose
capacitance with respect to ground is within design limits
(5 feet tall 90 pound person to 6 foot 5 inch 250 pound
person), the Jewel Workstation Continuous Mini Monitor
cannot be “fooled”. It will provide a reliable alarm only
when the wrist strap or work surface becomes
dysfunctional or unsafe according to accepted industry
standards. The Jewel Workstation Continuous Mini
Monitor is drift-free and designed to be insensitive to the
effects of squeezing or stretching the coil cord.
Advantages Of Wave Distortion And Single-
Wire Technology
The Jewel Workstation Continuous Mini Monitor
allows the use of any standard, single-wire wrist strap
and coil cord. The monitor / wrist strap / cord system
life-cycle costs are by far lower than alternative systems
which require expensive and less durable dual-wire
cords and special wrist straps. The Jewel Workstation
Continuous Mini Monitor is an economical way to
monitor both the operator’s wrist strap and workstation
surface. See “Maintenance and Calibration” (page 4) to
minimize life-cycle costs.
The dictionary defines constant as uniform and
unchanging, and continuous as uninterrupted.
Nonetheless, some dual-wire resistance monitors utilize
a pulsed test current and do not provide continuous
monitoring. For example, during each 2.2 second pulse
cycle of a leading “constant” resistive monitor, electrical
current is pulsed for only 0.2 seconds followed by an
unmonitored interval of 2 seconds. This leaves the user
/ wrist strap unmonitored for over 90% of each cycle.
Damaging static charges can easily occur in the portion
of the time in between the pulses. The off period of 2
seconds equals 2 billion nanoseconds, and “it takes
only about 25 volts applied for 100 nanoseconds to blow
most memories or microprocessors”.*
By using the reliable wave distortion impedance
technology to determine if the circuit is complete, there
are no false alarms. There is no need to adjust or
tune the monitor to a specific user or installation. The
miniscule amount of electrical current (less than 1 volt
coil cord signal) required to generate the waveform has
never caused reported skin irritation and is extremely
safe for use in voltage sensitive applications such as
disk drive manufacturing.
Worksurface Channel
The Jewel Workstation Continuous Mini Monitor
monitoring circuitry is sufficiently sensitive to detect
extremely low current, allowing it to be used with mats
having a resistance of up to 5 x 108 ohms RTG. When
the Monitor is connected to an ESD Mat worksurface,
the amount of current that flows is a function of the
total resistance between the monitor and through the
worksurface to ground. When the resistance of the
worksurface is below a pre-set threshold, the monitor
will indicate good. Conversely, if the resistance level is
high when compared to the monitor’s reference, the unit
will alarm. This is an integrating resistance measuring
circuit, therefore it is relatively insensitive to externally
induced electromagnetic fields. The resistance threshold
is factory set to 500 megohms. (It can be special
ordered to other limits. Limits can be varied and set to 1
gigohm maximum.)
Packaging
1 Jewel Workstation Continuous Mini Monitor
2 Push and Clinch Snaps
1 Power Adapter, 24VAC, N. America
1 Certificate of Calibration
Installation
Confirm that the surface resistance (RTG) of the mat is
5 x 108 ohms or less and has a conductive layer. We
the monitor from its packaging and inspect for any
shipping damage.
The Continuous Mini Monitor is normally installed toward
the front edge of a workstation where the LEDs are
easily visible. The unit is designed to be snapped on the
worksurface using the 10mm snap studs mounted at the
bottom of the monitor (see Figure 2).
ESD MAT
Push and Clinch Snaps
1-5/16"
Figure 2. Installation of push and clinch snaps to
worksurface
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| 19219 | MONITOR GROUND HUB US |
| 19223 | MONITOR CONTINUOUS WORKSTATION |
| 19226 | MONITR CONTINUOUS MULTI-MNT 120V |
| 19228 | MONITOR CONT MULTI-MOUNT |
| 19230 | MONITOR DUAL WORKSTATION 120V |
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| 19-218/BHC-ZL1M2QY/3T | 功能描述:標(biāo)準(zhǔn)LED-SMD SMD LED RoHS:否 制造商:Vishay Semiconductors 封裝 / 箱體:0402 LED 大小:1 mm x 0.5 mm x 0.35 mm 照明顏色:Red 波長/色溫:631 nm 透鏡顏色/類型:Water Clear 正向電流:30 mA 正向電壓:2 V 光強(qiáng)度:54 mcd 顯示角:130 deg 系列:VLMx1500 封裝:Reel |
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