Page 1 AR50 USER Manual Page 2 ® accumet Table of Contents R E S E A R C H Introduction Unpacking the Meter Specifications Getting Started Connectors Attaching pH and ISE electrodes Attaching Conductivity Probes Using the Meter Touch Screen Operation Choosing a Channel Button Functions System Setup Setup. buy and sell surplus LABORATORY equipment. BAMKO-SURPLUS . serving the petrochemical industry in surplus sales and investment recovery. Since 1996, PSI Agencies has specialized in the recycling of used scientific equipment and apparatus. Our expertise is in scientific equipment and we have serviced laboratories for the last 35 years..