ES601Plus OPERATING MANUAL
In addition to Safety and ECG tests, ES601Plus provides Tester Autosequences that allow the user to
remotely operate and/or acquire test data from an external testing device (e.g. a multimeter, a defibrillator
analyser, etc.) via any of six RS232 Tester Ports. Test Procedures can integrate an optional safety test with
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 software package for
Microsoft Windows 2000/XP.
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2.1 Testing Electrical Safety
ES601Plus performs a number of measurements related to testing the electrical safety of medical devices.
Electrical safety measurements performed by ES601Plus 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, ES601Plus applies a high voltage (500 VDC) between L1 and L2 shorted together, and the
ground. ES601Plus measures the resulting current and reports the test result as resistance in megohms. In a
variation of this test, ES601Plus applies the high voltage between the applied parts and the line cord ground
pin, and measures the resistance.
2.1.2 Protective Earth
In this test, ES601Plus 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 ES601Plus measures and reports as the test result.
To comply with requirements of various safety standards, ES601Plus performs this measurement twice: the
first resistance is measured with the DC test current sourced into the DUT enclosure and back through line
cord; a second resistance is then measured with the DC test current flowing through the DUT in the
opposite direction. The test result reported by ES601Plus is the larger of the two measurements.
When an ES601Plus with the factory installed Protective Earth Module (or "PETM") is used, an optional
variation of this measurement can be performed where the test current is 25 amps AC RMS, rather than 1
amp bipolar DC. The optional PETM allows protective earth tests to be performed in full accordance with
the requirements of the IEC60601 and IEC61010 safety standards. When an ES601Plus with PETM
conducts a 25A test, ten measurements are taken over a ten-second period. The highest result is reported
and saved in the Test Record.
Overview/Chapter 2 # Page 10
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