Tester, Combination, 3-State
Operation, Installation and Maintenance
Pass Range 750K - 35M
UNIT C, 4TH DIMENSION, FOURTH AVENUE, LETCHWORTH, HERTS, SG6 2TD UK
Phone: 0044 (0) 1462 672005, Fax: 0044 (0) 1462 670440 • e-mail:
TB-7533 October 2009 Page 1 of 4
© 2009 Vermason
Figure 1. Vermason
Combo Tester
Description
The Vermason Combo Tester is a 3-state
touch tester designed for fast and frequent
testing of ESD personnel grounding devices.
The Combo Tester incorporates a unique
dual test circuit design which improves
accuracy of testing and eliminates the need
for separate wrist strap and foot grounder
test units. The
is equipped with a
750 Kilohm - 35 Megohm circuit, ideal for the
testing of wrist straps and footwear.
Test parameters are factory set but can be
adjusted to match your own specifications.
The Combo Tester is very simple to operate.
A green light signals the user that everything
is OK. A red light and an audible indicator
means that the circuit resistance is either too
low or too high.
The testers each include a
convertor, which converts the
banana plug on the face of
the unit into a 10mm snap.
NOTE: Once the convertor
has been put into the plug socket it cannot
be removed.
“The primary means of grounding personnel
shall normally be by a wrist strap connected
to an EBP [Earth Bonding Point].” (EN
61340-5-1 paragraph 5.5) “Wrist straps shall
be checked before use. Each check shall
be made with the wrist band worn in contact
with the wearer’s skin and with the ground
cord attached to the appropriate tester.” (EN
61340 5-1 paragraph 9.6) “The wrist strap
shall consist of a band that fits snugly around
the wrist and a cord to connect the band
to an EBP...The total resistance from hand
to EBP shall be in accordance with table
1 [Rg 7,5 x 10^5 to 3,5 x 10^7 ohms]. (EN
61340-5-1 paragraph 5.2.7)
“All wearers shall check that their heel and
toe straps meet requirements. The check
shall be made before entering the EPA.”
(EN 61340 5-1 paragraph 9.6.3) “When
the footwear/floor systems are used as the
primary means of grounding personnel,
the resistance of the combination shall be
determined by the ESD co-ordinator, and
is recommended to be between 7,5 x 10^5
ohms and 3,5 x 10^7 ohms.” (EN 61340-5-1
Table 1 Note 2)
The tester operates on either a 9 volt battery
or a special AC adapter. The combo tester
is available in two models: the tester alone,
or the tester with a stand. A footplate is also
available for use with the
CAUTION: Use only the AC adapter
designed for this unit. Using any other
adapters may damage the unit and void the
warranty.
Inspection
Remove the tester from the carton and
inspect for damage.
Items included with model
1 Combo Tester
1 9 volt battery
1 converter
1 Certificate of NIST calibration
Items included only with model
:
1 Combo Tester
1 Base Plate
1 Pedestal tube with bracket and boot
installed
1 10cm banana plug connector
1 Vinyl insulator cap
1 Wall poster
1 5/32” hex wrench
1 9 volt battery
1 converter
Model number
is ideally suited for
testing foot grounding devices. Item number
can also be used in conjunction with
the combo tester for testing of footwear.
Installation of Model
The Combo Tester may be used as a
portable unit, or may be permanently
mounted on either a table or a wall. Please
refer to the following instructions when
installing your tester.
Stationary Installation
If you will be using the tester as a portable
unit you may prefer to mount the unit to a
table or wall. Three keyhole slots on the back
of the unit are included to allow you to attach
the tester to a stationary surface.
Figure 2. Mounting hole locations
1. Select location for mounting tester. Install
three #6 or #8 screws spaced as illustrated
in figure 3, into a wall or other vertical
surface. Make sure that the screw heads
do not project out more than 6.35 mm from
mounting surface. The template on page four
is actual size.
2. Mount the tester on the screws, pulling
down to lock it in place.
Figure 3. Stationary installation of the Combo
Tester
Operation
The Combo Tester can be operated either
on battery or AC power. The unit comes
equipped with a 9 volt alkaline battery. For
AC operation, plug the optional AC adapter
into the mini phone jack located on the upper
left hand corner of the tester. An AC adapter
is sold separately as item number
(220 volt).
Model Description
Tester, Banana Jack
Tester w/stand
Footplate, stainless steel
AC Adapter, 220V
60mm
41mm
6mm
TECHNICAL BULLETIN TB-7533
Made in the
United States of America
