U1253B User’s and Service Guide XXIII
List of Tables
Ta b l e 1 - 1 Rotary switch description and functions 7
Ta b l e 1 - 2 Keypad descriptions and functions 9
Ta b l e 1 - 3 General display annunciators 11
Ta b l e 1 - 4 Primary display annunciators 12
Ta b l e 1 - 5 Secondary display annunciators 14
Ta b l e 1 - 6 Analog bar range and counts 16
Ta b l e 1 - 7 Selecting display with the Shift button 17
Ta b l e 1 - 8 Selecting display with the Dual button 19
Ta b l e 1 - 9 Selecting display with the Hz button 22
Ta b l e 1 - 1 0 Terminal connections for different measurement
functions 26
Ta b l e 2 - 1 Percentage scale and measurement range 35
Ta b l e 2 - 2 Audible continuity measurement range 44
Ta b l e 3 - 1 Available frequencies for square wave output 77
Ta b l e 4 - 1 Default factory settings and available setting options for
each feature 85
Ta b l e 4 - 2 Available settings for M-initial 112
Ta b l e 5 - 1 Battery voltage and corresponding percentage of charg-
es in standby and charging modes 126
Ta b l e 5 - 2 Error messages 128
Ta b l e 5 - 3 U1253B measurement readings for fuse checking 133
Ta b l e 5 - 4 Fuse specifications 134
Ta b l e 5 - 5 Basic troubleshooting procedures 136
Ta b l e 6 - 1 Recommended test equipment 138
Ta b l e 6 - 2 Performance verification tests 145
Ta b l e 6 - 3 Valid adjustment reference input values 159
Ta b l e 6 - 4 List of calibration items 167
Ta b l e 6 - 5 Calibration error codes and their respective
meanings 172
Ta b l e 7 - 1 DC accuracy ± (% of reading + number of LSD) 174
Ta b l e 7 - 2 Accuracy specifications ± (% of reading + number of
LSD) for true RMS AC voltage 177
Ta b l e 7 - 3 Accuracy specifications ± (% of reading + number of
LSD) for true RMS AC current 177
Ta b l e 7 - 4 Accuracy specifications ± (% of reading + number of
LSD) for AC+DC voltage 179