The 1855 instrument measures and displays the undesirable flow of current through a capacitor over any surface of insulation.

• Leakage Current Measurements for 1nA to 20mA 
• Insulation Resistance Measurements from 10Ω to 99GΩ 
• Breakdown Testing of Aluminum Electrolytic Capacitors per EIAJ RC-2364A 
• Basic Measurement Accuracy, 0.3% Leakage Current, 0.6% IR 
• Programmable Test Voltage from 1 to 650VDC 
• High Charge Current from 0.5mA to 500mA 
• LCD Display for Menu Programming and Test Results 
• RS-232 Interface Standard, PLC and IEEE-488 Optional 
• Comparator Functions with Programmable Pass/Fail Limits 
• Front Panel Lockout Prevents Unwanted Alterations to the Setup 
• Powerful Discharge Circuit for Large Capacitors 
• Monitors and Displays Voltage to the Device Under Test 
• Programmable Charge, Dwell, and Averaging Times