CLEAN ION
CONTINUOUS WRIST STRAP MONITOR W S A - 1
------------------------------- TECHNICAL SPECIFICATIONS
-------------------------------
Description
The CLEAN ION continuous wrist strap monitor model WSA-1, provides
constant monitoring of ESD grounding as well as that of the
integrity of two operators wrist straps all simultaneously.
This unit incorporates independent circuitry so that the effective
monitoring of one operator is remote from the other. Any conventional
single wrist strap can be monitored by this cost effective
device that measures the capacitive load of the wrist bands
and operators, therefore eliminates the need for expensive
two wire cords or special wrist bands. The WSA-1 is a device,
which instantly alerts an operator of either a failed wrist
strap or coil cord with an audible and visible alarm. The
monitor also verifies a good electrical discharge path from
the wearer's body to the ground. Easy to use. The monitor
is drift-free whereby squeezing or stretching the wrist strap
coil has no effect on the monitor. The WSA-1 is powered by
a 9V DC adaptor.
Installation
The CLEAN ION continuous wrist strap monitor WSA-1 set also
includes the following: 9V DC adaptor 1 pc Grounding cord,
with absent operator flying lead connection cord 1 pc The
unit is designed to be either mounted under the workstation,
or conveniently mounted at eye level in front of the operator.
Picture 1 shows the connected unit.
( 1a )
|
(
1b )
|
(
1c )
|
The
complete WSA-1 set connected
|
System
connected 9 volt DC to top of photo - both ground cords
connected to earth and flying operator absent lead
|
Two
wrist straps connected.
|
Operation
1. Plug the D.C. adaptor into a VAC outlet and connect the
mini jack on the adaptor into the monitor marked `9V D.C.
2. Plug one end of grounding cord attached with a single banana
plug into monitor marked earth.
3. Connect or clip the other end of grounding cord with the
`two headed banana plug` (or alligator clips) to ground. The
other banana plug (or alligator clip) is connected to the
flying lead to close the circuit should one of the operators
be absent from the workstation.
4. Activate the monitor with the red switch marked `On` -
`Off`. The red `Fault` LED should flash and the alarm should
beep.
5. Plug both wrist strap banana plugs into both ports of the
monitor marked strap and operators should then immediately
put on their wrist bands. This should automatically turn off
the alarm and the flashing red `Fault` LED will change to
`In use` LED.If the alarm still beeps, check connection of
coil cord strap on wrist strap for continuity, wrist strap
is securely fitted on operator's wrist and wrist strap banana
plugs are fully inserted into monitor. Also confirm that the
grounding lead is properly earthed.
6. Flexibility. When one of the operators leaves the work
station, the operator can either:
(i) Remove the absent operators banana plug from the wrist
strap socket and insert the banana plug of the flying lead
attached to the earth (ground) connection lead into the wrist
strap socket.
.Or (ii) The operator who has become absent from the work
station, should remove their wrist band from their arm only,
leaving their wrist band ground cord banana plug still connected
to the wrist strap port of the device. The alligator clip
attached to the flying lead which is connected to the earth
grounding cord, can be clipped to the wrist band this again
closing the circuit loop.
(i)
|
(ii)
|
Wrist band cord banana plug removed from monitor
- flying lead (from ground cord spur) banana plug
inserted - after removing alligator clip.
|
Connecting
flying lead alligator clip
(from ground cord spur) to inside of wrist band
- wrist band ground cord banana plug remains connected.
|
N.B.
Ensure that the alligator clip makes good contact with the
conductive inner face of the wrist band.Should both operators
vacate the workstation, disarm the whole monitor system by
switching the red rocker switch to the off position.
7. Alarm. The alarm is instantly activated once the resistance
level exceeds the factory pre-set resistance threshold level
as per customer's requirement.
8. Additional safety feature. Unlike conventional resistance
based monitors,the Maxclean continuous wrist strap monitor
incorporates an internal 1- Meg ohm resistor for additional
current limiting protection, in case the typical 1 -Megohm
resistor in the strap fails.
Specifications
Operating
Voltage |
9V
DC (adaptor) |
Operating
Temperature |
0
40 Deg. C |
Operating
Humidity |
<
90% |
Alarm
response time |
<
1 second |
Accuracy
of resistivity |
+
/ - 5% |
Size |
10
x 7 x 2.5 cm |
Maintenance
/ Calibration
WSA-
1 is designed to be maintenance free and is calibrated to factory
specifications.
Please contact the company for any units requiring calibration
annually.
|