Martindale ltdv extension lead tester martindale marltdv p a martindale extension lead tester for pat checking this unit includes an integral iec mains lead test feature and essential extras for anyone carrying out pat tests p p designed for use with easypat micropat pac1500xi pat1900xi pat2100xi at500h mpat40 mpat60 megger pat4 robin pats and all edgcumbe metrohm pats p martindale marltdv extension lead tester