27 II/28 II
Users Manual
ii
Capacitance Measurements ..................................................................................... 23
Diode Tests............................................................................................................... 24
AC or DC Current Measurements............................................................................. 26
Frequency Measurements ........................................................................................ 29
Duty Cycle Measurements........................................................................................ 31
How to Determine Pulse Width ................................................................................. 32
Bargraph........................................................................................................................ 32
Zoom Mode (Power Up Option Only)........................................................................ 33
Uses for the Zoom Mode .......................................................................................... 33
HiRes Mode (28 II)......................................................................................................... 33
MIN MAX Recording Mode ............................................................................................ 34
Smooth Feature (Power Up Option Only)...................................................................... 34
AutoHOLD
Mode ........................................................................................................... 36
Relative Mode................................................................................................................ 36
Maintenance .................................................................................................................. 37
General Maintenance................................................................................................ 37
Fuse Test.................................................................................................................. 37
How to Replace the Batteries.................................................................................... 38
How to Replace the Fuses........................................................................................ 39
Service and Parts .......................................................................................................... 39
General Specifications................................................................................................... 44
Detailed Specifications .................................................................................................. 46
27 II AC Voltage........................................................................................................ 46
28 II AC Voltage........................................................................................................ 47
DC Voltage, Conductance, and Resistance.............................................................. 48
Temperature (28 II Only)........................................................................................... 49
AC Current................................................................................................................ 49
DC Current................................................................................................................ 50
Capacitance.............................................................................................................. 50