1. Instrument Layout
1.1 Overview of the PAT400
The PAT400 series of portable appliance testers are fully automated testers for the fast safety testing of
portable electrical equipment. The PAT400s will operate from 230 Vac or, for UK variants 230Vac and 110
Vac supplies.
All warnings must be read and understood before the tester is used.
All operators should also be competent in the safety testing of electrical equipment and meet all the local
legal requirements before testing.
9 V PP3 rechargeable NiMH Battery is supplied - not fitted. This should be installed prior to first use. See
section 1.8 for instructions.