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參數(shù)資料
| 型號： | 19223 |
| 廠商： | Desco |
| 文件頁數(shù)： | 2/3頁 |
| 文件大小： | 0K |
| 描述： | MONITOR CONTINUOUS WORKSTATION |
| 標(biāo)準包裝： | 1 |
| 類型： | 工作站監(jiān)視器 |
| 使用： | 腕帶監(jiān)視 |
| 特點： | 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，硬件，粘扣帶 |
“fooled”. It will provide a reliable alarm only when the wrist
strap becomes dysfunctional or unsafe according to
accepted industry standards. The Multi-Mount Continuous
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 Desco Multi-Mount Continuous 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 &
fragile dual-wire cords and special wrist straps. Dual-wire
cords are expensive and are the weak link of the system,
the most likely component to need replacement. Over a five
year period, this can make the dual-wire system three to
five times as expensive as a system utilizing single-wire
wrist straps and cords. See Calibration (page 3) 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 really 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”.* The dual-wire system
does not reliably meet all industry specifications, as the
cords do not meet the EOS/ESD S-1.0 paragraph 4.1.6,
1 to 5 pound “breakaway force” requirement for operator
safety.
By using the reliable wave distortion 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.
Installation
Remove the monitor from its packaging and inspect for any
shipping damage. Included with each Multi-Mount
Continuous Monitor should be:
1
120 VAC transformer
2
Mounting screws
1
Adhesive-backed Velcro strip
Figure 2. Installation of Multi-Mount Continuous Monitor on
the side of a machine.
The Multi-Mount Continuous Monitor has a variety of
mounting options. It can be installed under a work bench
where the LEDs are easily visible. It can also be installed
on a surface of a machine, oven, laminate, or other
equipment. The mounting tabs with holes facilitate easy
mounting of the unit.
A convenient 120 VAC outlet should be located and tested
for proper wiring and grounding. We recommend Desco
Item 98130 AC Outlet Analyzer to verify integrity of building
ground point.
Plug the transformer into the outlet and connect the output
plug into the back side of the monitor.
Operation
When the Multi-Mount Continuous Monitor is installed, the
monitor’s red Operator LEDs should be on.
Figure 3. Example of continuous monitoring of an operator
using the Multi-Mount Continuous Monitor.
TB-3024 Page 2 of 3
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 (909) 627-8178 Fax (909) 627-7449
DESCO EAST - 90 Hudson Road, Canton, MA 02021-1407 (781) 821-8370 Fax (781) 575-0172 Web Site: Desco.com
*1981 article by Donald E. Frank - Electrical Overstress /
Electronic Discharge Symposium Proceedings
2006 DESCO INDUSTRIES INC.
Employee Owned
The monitor takes 6 seconds to activate its alarm circuitry when it is first
plugged in.
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| 19230 | MONITOR DUAL WORKSTATION 120V |
| 19232 | MONITOR W/SPLIT REMOTE MOD 120V |
| 19240 | WRISTSTRAP TESTER 9V OPERATION |
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