TRIO TeST & MeaSUReMeNT
17
Copyright 2015 all rights reserved
8 Appliances connected to the mains via a 3 pin plug with
no Double Insulated (Class 2) symbol visible, should be
considered Earthed Appliances (Class 1), however, with
some appliances of this kind, the earth conductor provides
not only a degree of electrical safety but also a path to
conduct EMI currents, to reduce noise. This EMI current
may cause an appliance to fail due to, what the
Pro Logger sees, as excessive leakage. Also, with some
other appliances, there is simply no practical way of
finding a connection to the Earth Conductor i.e. it has
no exposed earthed metal parts.
The first phase of this test, while running the appliance,
looks for 1mA of leakage current between the Pro Logger’s
Cloak and the appliance’s case i.e. a standard Double
Insulated Run Test. If the Pro Logger measures more
than this, it will try again with an increased 5mA threshold
(because the appliance is Earthed, up to 5mA of Leakage
Current is permissible).
The person conducting the test will be warned that the
1mA threshold has been exceeded and that a 5mA test will
be conducted. Any more than 5mA of leakage current will
cause the test to fail.
To test these appliances use:
• Three (3) Pin Class 2 Run Test
9 Where a Class I earthed appliance requires a longer than
normal run time (approximately 2 minutes), the following
test may be used:
• Long Class I Run†
10 For a 3 phase appliance Run Test, select:
• 3 Phase Run Test*
Note 1:
New tests may be added to the Other Appliance
menu from time–to–time. For details regarding upgrades
contact TRIO.
*Note 2:
The 3 Phase Run Test is an option for the
Pro Logger II (see also Run testing 3 Phase appliances)
†Note 3:
Available only on Pro Logger II's with firmware
version 4.04 or later.
WaRNINg
This test does not look for the presence of an Earth
Conductor. It should only be used if the normal Earthed
Appliance Insulation Resistance Test has continually failed.
Safety testing other appliances (OThER APPLIANCE menu)
