Desco Europe Combo Tester X3 Technical Bulletin

Combo Tester X3
Installation, Operation and Maintenance
Figure 1. Desco Combo Tester X3 and Dual Foot Plate
Description
The Desco Combo Tester X3 verifies the functionality
of personnel grounding devices (wrist straps
grounders, ESD shoes, smocks
tests are performed simultaneously on the wrist strap
and each foot. Green lights indicate a pass condition.
Red and yellow lights plus an audible alarm indicate
when the wrist strap and/or footwear (left or right) have
failed. DIP switches may be accessed for test limit
preferences. Access control to an ESD Protected Area
can be further enforced by using the relay terminal on
the Combo Tester X3 and connecting it to an electronic
door lock or turnstile to grant access only to those who
have passed their personnel grounding device tests.
The Combo Tester X3 is calibrated to NIST standards
and includes a certificate.
Desco Combo Tester X3 Technology
• The solid-state touch test switch maintains test
accuracy and extends the lifetime of the tester
• The 30 volt test signal increases test reliability
• Pairs with the EMIT
to test operators that wear ESD gloves or finger cots
per Compliance Verification required by ESD TR53
The factory test limits are set to:
Wrist Straps: 750 kilohms and 10 megohms
Footwear: 750 kilohms and 35 megohms
(See page 3 for alternate test limit settings)
TB-3080.E Page 1 of 8 June 2019
TECHNICAL BULLETIN TB-3080.E
, foot
1
). Three independent
2
50755 ESD Glove Test Fixture
DESCO EUROPE - 2A DUNHAMS LANE, LETCHWORTH, HERTFORDSHIRE, SG6 1BE, UK
Phone: +44 (0) 1462 672005 • E-mail: Service@DescoEurope.com, Website:
The Combo Tester X3 and its accessories are available
as the following item numbers:
Item Description
19270 Combo Tester X3
19271 Combo Tester X3 with Stand
19287 Combo Tester X3 with 10 mm Adapter
19288 Combo Tester X3 with 10 mm Adapter & Stand
50755 ESD Glove Test Fixture
50424 Limit Comparator
19262 Power Adapter, 100-240 VAC Input, 12 VDC
0.5 A Output, All Plugs
19273 Replacement Dual Foot Plate
19274 Replacement Ground Cord
62103 Replacement Foot Plate Cord
This product can be used as one of the tools to fulfil
EN 61340-5-1 Compliance verification requirements
"Process monitoring (measurements) shall be conducted
in accordance with a compliance verification plan that
identifies the technical requirements to be verified, the
measurement limits and the frequency at which those
verifications must occur. ... Compliance verification
records shall be established and maintained to provide
evidence of conformity to the technical requirements.
The test equipment selected shall be capable of making
the measurements defined in the compliance verification
plan."
"Wrist straps should be tested periodically. The
frequency of testing, however, is driven by the amount
of usage, wear and ESD risk exposure that can occur
between tests. For example, what is the quantity of
product handled between test periods?
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 a guarantee of a continuous, reliable
ground is needed then continuous monitoring should be
considered or even required."
(IEC TR 61340-5-2 Wrist strap use and selection clause
4.7.2.4.4 Test frequency)
1. The Combo Tester X3 can verify single-wire and dual-wire wrist
straps.
2. The Combo Tester X3 will also test a Groundable Static Control
Garment System. The Groundable Static Control Garment System
must have an RTG of < 3.5 x 10⁷ ohms to meet the required limit
of IEC 61340-5-1 tested per IEC 61340-4-9.
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