Electrical Safety Testing; Ground Stud Connector - Welch Allyn Connex Vital Signs Monitor 6000 Series Service Manual

Electrical safety testing

Welch Allyn recommends performing ground continuity and leakage current tests after
all open-case repairs and dielectric strength testing
primary wiring according to EN/IEC 60601-1 - Medical Electrical Equipment – Part 1:
General Requirements for Basic Safety and Essential Performance or EN/IEC 62353 -
Medical Electrical Equipment - Recurrent Test and Test After Repair of Medical Electrical
Equipment.
Due to the variability of test equipment in the field, Welch Allyn does not include specific
instructions to perform electrical safety tests. When performing electrical safety tests,
refer to your test equipment manuals for detailed instruction. The following table
provides connections and test limits to assist you in performing these tests.
Test
Ground continuity
Leakage current
Insulation resistance
* To locate the equipotential terminal, see "Controls, indicators, and connectors."

Ground stud connector

This device is equipped with a ground stud (equipotential terminal) for electrical safety
testing, and to connect a potential equalization conductor. To ensure use of the proper
connector for safety testing, the ground stud is recessed into the system's housing. Do
not use "alligator" style clamps or connectors. The mating electrical connector requires
self assembly by crimping it to appropriate connecting leads.
The mating connector (Type POAG-KBT6DIN, order number 15.0010) consists of the
right-angled socket and insulator, as shown in the next figure. You can purchase the
mating connector and the crimping pliers from the manufacturer, Multi-Contact:
http://www.multi-contact.com.
1
Perform this test only if there is a reason to doubt the integrity of the electrical insulation (e.g. multiple
trips of a residual-current device or liquid ingress of a saline solution). If you determine this test should
be performed, return the device to Welch Allyn for service.
1
when replacing the power supply or
Limits
Ground continuity from EP stud* (equipotential terminal) to the Gnd pin of the
IEC power connector shall be no greater than 0.1 ohms.
Leakage current shall be less than 500 µA from EP stud* to mains (Line and
Neutral pins of the IEC power connector).
Dielectric strength shall be 500 V (DC) EP stud* to IEC mains (Line and Neutral
pins of the IEC power connector), and insulation resistance is measured.
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