UNIVERSAL TEST KIT
Installation, Operation and Maintenance
UNIT C, 4TH DIMENSION, FOURTH AVENUE, LETCHWORTH, HERTS, SG6 2TD UK
Phone: 0044 (0) 1462 672005, Fax: 0044 (0) 1462 670440 • e-mail: [email protected], Internet: Vermason.co.uk
TB-7544
December 2008 Page 1 of 2
© 2008 Vermason
Description
At the heart of this kit is an electrical
resistance tester built into a 2.5kg
test probe. The kit is designed to
test the resistance to ground of
operators as well as working
surfaces, wrist straps, soldering iron
tips and other components of an
ESD Protected Area in the manner
described in EN 61340-5 A whole
workstation may be audited in 4
simple steps greatly reducing the
time to audit an ESD protected area
(EPA).
The tester has three test voltages:
24V for personnel, 100V for surfaces,
and 5V for hard ground. Four LED
indicate the range in which the
measured resistance falls. They
mark the thresholds described in EN
61340-5-1. The tester is powered by
a 9V NiMH rechargeable battery. A
charger is included in the kit along
with ground cord, insulated crocodile
clip and 10mm-stud-and-socket
converter.
The Universal Tester is CE approved
for use in medium industrial
environments. Its operating
temperature range is 10 to 35ºC.
Inspection
Remove the test unit from the carton
and inspect for shipping damages.
Each 225706 unit should include the
following:
1 Test unit, item #225706
1 Cord with two 4mm plug
terminations
1 Stud to socket adaptor
1 Insulated wide-jaw crocodile clip
1 Carry case (E9 Tool Box)
1 Battery charger
Each 225708 unit should include the
following:
1 Test unit, item #225706
1 Cylindrical probe 2.5kg
1 Cord with two 4mm plug
terminations
1 Stud to socket adaptor
1 Insulated wide-jaw crocodile clip
1 Carry case (E9 Tool Box)
1 Battery charger
Procedure
The button located on the top face
controls the tester operation. Four
different modes of operation can be
selected using this button. A buzzer
helps to select and confirm the
mode.
To audit a workstation, proceed as
follows:
1. Place the tester on the workbench.
Connect it to hard ground using
the straight lead and crocodile clip.
An electrical earth is suitable in
most cases.
2. Testing bench top resistance to
ground: depress the test button
once to select the bench top test
sample mode. The tester beeps
once, the test voltage LED’s turns
orange, confirming that the correct
mode has been selected. At first
the four LED’s flash and then one
latches to indicate the resistance
to ground value of the bench top.
The orange marking on the label
is used to read the resistance
value. The tester powers off
automatically after 4 seconds.
Alternatively, choose the
continuous test mode by rapidly
tapping the test button three
times. The continuous test mode
allows the meter to be moved and
several spots to be tested.
3. Testing of operator in-situ
resistance to ground: leave the
tester in position. The operator
wearing a wrist strap presses the
test button and keeps it depressed
until the end of the test. The test
voltage LED’s turns red and the
buzzer produces a long beep,
confirming the wrist strap test
mode. The four LED’s flash, then
one latches to indicate the
operator's resistance to ground.
Use the red marking on the label
to read the test result. Two green
LED’s and buzzer indicate that the
resistance to ground is within the
limits set by EN 61340-5-1. In
case of failure it is possible to
determine the cause by testing the
wrist strap on its own; disconnect
the cord from the grounding point
(EBP) and connect it to the 10mm
stud or 4mm socket on the side of
the tester and repeat the test.
Similarly, the cord can be tested
on its own by detaching it from the
wristband and pressing the socket
of the free end on the test button.
Operators wearing conductive
footwear can be audited in exactly
TECHNICAL BULLETIN TB-7544
Made in Britain
Figure 1. 225708 Universal Test Kit
