MI 3309 DeltaGT
Single test
30
Any signs of pollution, moisture, dirt that can jeopardize safety. Especially openings,
air filters, protection covers and barriers must be checked!
Are there signs of corrosion?
Are there signs of overheating?
Inscriptions and markings related to safety must be clearly readable.
Installation of the device under test must be performed according to the instruction
manual.
During visual inspection the measuring points for the electrical testing have to be
determined too.
Visual inspection procedure
Select the VISUAL INSPECT. function.
Check the device under test.
Select PASS or FAIL according to the result of visual inspection.
Store the result by pressing MEM key (optional).
Figure 5.3: Visual inspection menu
5.2.2 Earth continuity resistance
This test ensures that the connections between the protective conductor terminal in the
mains plug of the device under test and earthed accessible conductive parts of the device
under test are satisfactory and of sufficiently low resistance. This test has to be performed
on Class I (earthed) appliances. The instrument measures the resistance between:
S/EB terminal and PE of the test socket;
PE of the IEC test terminal and PE of the test socket (for IEC Cords);
S/EB terminal and PE terminal (for fixed installed appliances).
Figure 5.4: Earth continuity menu
Test parameters for Earth continuity resistance measurement
LIMIT
Maximum resistance
[0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
2.00
]
TIME
Measuring time
[2 s, 5 s, 10 s, 30 s, 60 s, 120 s, --- s (continuous
measurement)]
