DATREND Systems ES601-US, Operating Manual

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ES601-US OPERATING MANUAL
Overview/Chapter 2
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Page 10
inspection steps and tester remote control steps, which can then be linked to specific equipment control
numbers. These parameters can be programmed by the user by using the
ES601pc-US software package for
Microsoft Windows
®
7 or XP.
2.1 Testing Electrical Safety
ES601-US performs a number of measurements related to testing the electrical safety of medical devices.
Electrical safety measurements performed by ES601-US include:
2.1.1 Insulation Resistance
This is a test of the breakdown strength of electrical insulating materials that provide electrical isolation
between certain electrical conductors and the ground connection at the AC receptacle. At the AC line cord
of the DUT, ES601-US applies a high voltage (500 VDC) between hot and neutral shorted together, and the
ground. ES601-US measures the resulting current and reports the test result as resistance in megohms. In a
variation of this test, ES601-US applies the high voltage between the patient leads and the line cord ground
pin, and measures the resistance.
2.1.2 Ground Resistance
In this test, ES601-US will source one amp of DC current through the dead short circuit that should exist
from the ground pin on the line cord of the DUT to any exposed metal part on the DUT's enclosure. In
practice, the connection from the ground pin to the enclosure of the DUT has a non-zero resistance in the
range of 0.02 to 0.2 ohms, and this is what ES601-US measures and reports as the test result.
By providing multiple measurement and point-to-point test modes, ES601-US accommodates special test
requirements of permanently-installed equipment, and manufacturer-recommended protocols where
continuity of ground must be verified at several locations on the equipment. Multiple resistance
measurements and point-to-point testing can be enabled for manual tests or automated test sequences.
2.1.3 Line Voltage
In this test, ES601-US connects an internal voltmeter to the AC supply input and reports the AC RMS
voltages measured between hot and neutral, hot and ground, and neutral and ground.
2.1.4 Load Current
To perform this measurement, ES601-US connects an internal ammeter to the DUT and measures the
current it draws from the AC line when the DUT is powered up and running.