Seaward A252 - Manual (Page 26)

A252 Portable Appliance Tester TEST PROCEDURES
I NSULATION R ESISTANCE M EASUREMENT @ 500 V DC - E ARTHED A PPLIANCES
Connect the test instrument to an Earthed supply and switch ON. Connect the appliance to be tested into
the appropriate 110V or 240V socket and ensure that appliance switches are ON.
Select the 500vDC Megohms test and depress the TEST button. The test voltage is applied across the
Earth path and both the Line and Neutral paths and the Insulation Resistance (in Megohms) will be
indicated on the lower meter scale - for the insulation to be considered as satisfactory, the resistance must
be greater than 2 Megohms for earthed appliances.
I
NSULATION R ESISTANCE M EASUREMENT @ 500 V DC - D OUBLE I NSULATED A PPLIANCES
Connect the test instrument to an Earthed supply and switch ON. Connect the appliance to be tested into
the appropriate 110V or 240V socket and ensure that appliance switches are ON.
Select the 500vDC Megohms test and depress the TEST button. Apply the safety Flash Probe to relevant
test points on the appliance to measure the Insulation Resistance between the test point and both the Line
and Neutral paths.
Observe the value (in Megohms) on the lower meter scale - it must be greater than 7 Megohms.
D0010024.DOC (01/01/94) Page 26 INSTRUCTION MANUAL