CharlesWater 99093 Technical Bulletin

Dual Operator Workstation Continuous Monitor with
Satellites - Operation, Installation and Maintenance
Figure 1. Charleswater Dual Operator Continuous Monitor with
Satellites
Description
Leading companies use continuous monitors as a cost
effective component in satisfying the clause 5.2.3 Compliance
Verification Plan requirements of EN61340-5-1 Edition 1.0
2007-08. The Charleswater Dual Operator Continuous Monitor
with Satellites continuously monitors the grounding integrity of
two operators, and two ESD working surfaces' path to ground.
The monitor will provide instantaneous notification of static
control equipment failures, and eliminates the need of costly
and difficult to supervise wrist strap logging record keeping.
This unit is highly cost effective as it is designed to monitor any
conventional single-wire wrist strap and ground cord system.
Per ESD Handbook TR 20.20 paragraph 5.3.2.4.4 Test
Frequency, "Because wrist straps have a finite life, it is
important to develop a test frequency that will guarantee
integrity of the system. Typical test programs recommend
that wrist straps that are used daily should be tested daily.
However, if the products that are being produced are of such
value that knowledge of a continuous, reliable ground is
needed, then continuous monitoring should be considered or
even required."
The Dual Operator Continuous Monitor with Satellites is
available in the following models:
Item Power Adapter Input
99093
99095
The Dual Operator Continuous Monitor with Satellites is a
single-wire impedence continuous monitor designed to monitor
body types from a 5th percentile female to a 95th percentile
male. This range covers a 5 foot tall 90 pound person to a 6
foot 5 inch 250 pound person in any production environment.*
The 99093 and 99095 is powered by a 220 VAC, 60/50 Hz,
plug-in transformer which also provides connection to ground.
No user adjustment required: The Continuous Monitor is
drift-free and designed to be insensitive to the effects of
squeezing or stretching the coil cord. It requires no user
adjustment.
PPE-5101.E June 2012 Page 1 of 4
TECHNICAL BULLETIN PPE-5101.E
Parking Snap Size
220 VAC 4mm
10mm
220 VAC
Unit 17. Millbrook Business Park, Sybron Way • Crowborough, East Sussex TN6 3JZ United Kingdom
Phone: 00 44 (0) 1892-665313, Fax: 00 44 (0) 1892-668838 • Internet:
The Dual Operator Workstation Continuous Monitor is a
real time instrument that ensures that critical ESD control
components in a sensitive area are effectively grounded. It
independently monitors the operator and the work surface.
The instant an operators wrist strap or cord fails, the monitor
will issue audible and visual alarms alerting the user of the
problem. In the same manner, the unit also confirms that a
path to ground of less than 10 megohms (1 x 10E7 ohms)
exists from the ESD protective work surface(s).
ADVANTAGES OF CONTINUOUS MONITORING
OVER PERIODIC TESTING
Many customers are eliminating periodic touch testing of wrist
straps and are utilizing continuous monitoring to better ensure
that their products were manufactured in an ESD protected
environment. Full time continuous monitoring is superior to
periodic or pulsed testing, and can save a significant amount
of money in testing costs and rejected product. Periodic testing
detects wrist strap failures after ESD susceptible products have
been manufactured. The costs of dealing with the resulting
catastrophic failures or latent defects can be considerable.
Dual Operator Workstation Continuous Monitors eliminate the
need for users to test wrist straps and log the results; by their
function, these monitors satisfy the ISO and ANSI/ESD S20.20
test logging.
"A properly grounded wrist strap will keep a person's body
voltage to approximately + 10 V. The main advantage to a
constant [or continuous] monitor is the immediate indication
that the employee receives if the wrist strap falls open. With
an unmonitored system, the employee will not be aware of
a wrist strap failure until the start of the next shift. This has
reliability benefits for an ESD program as it might help reduce
or eliminate ESD damage. There are also other process
benefits from using constant monitors such as the elimination
of the need to maintain daily test logs and a reduction in the
time for employees to make the daily test. For units that also
monitor the connection of a work surface to protective earth, it
is also possible to reduce or eliminate the checking of the work
surface as part of the periodic audit of the process. Constant
monitors might be implemented by an organization due to
high reliability requirements imposed by customers." [CLC/TR
61340-5-2:2008 User guide Annex B.1.3 Constant monitors]
WAVE DISTORTION DETECTION TECHNOLOGY
PROVIDES TRUE 100% CONTINUOUS MONITORING
From the technical alternatives available, Charleswater designs
and manufactures many of its Continuous Monitor product
offerings using wave distortion technology . Wave distortion
circuitry monitors current/voltage phase shifts and provides
true 100% continuous monitoring. Electrical current will lead
voltage at various points due to the combinations of resistance
and capacitive reactance. By monitoring these "distortions"
or phase shifts, the wave distortion Workstation Continuous
Monitor will reliably determine if the circuit is complete.
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Made in the
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© 2012 CHARLESWATER LTD.