U1253B User’s and Service Guide XXI
List of Tables
Ta b l e 1 - 1 Rotary switch description and functions 10
Ta b l e 1 - 2 Keypad descriptions and functions 12
Ta b l e 1 - 3 General display symbols 14
Ta b l e 1 - 4 Primary display symbols 15
Ta b l e 1 - 5 Secondary display symbols 17
Ta b l e 1 - 6 Analog bar range and counts 19
Ta b l e 1 - 7 Selecting display with the Shift button 20
Ta b l e 1 - 8 Selecting display with the Dual button 21
Ta b l e 1 - 9 Selecting display with the Hz button 25
Ta b l e 1 - 1 0 Terminal connections for different measurement
functions 28
Ta b l e 2 - 1 Numerical steps descriptions 30
Ta b l e 2 - 2 Percentage scale and measurement range 35
Ta b l e 2 - 3 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 111
Ta b l e 5 - 1 Battery voltage and corresponding percentage of charg-
es in standby and charging modes 127
Ta b l e 5 - 2 Error messages 129
Ta b l e 5 - 3 U1253B measurement readings for fuse checking 134
Ta b l e 5 - 4 Fuse specifications 136
Ta b l e 5 - 5 Basic troubleshooting procedures 138
Ta b l e 6 - 1 Recommended test equipment 138
Ta b l e 6 - 2 Performance verification tests 144
Ta b l e 6 - 3 Valid adjustment reference input values 158
Ta b l e 6 - 4 List of calibration items 166
Ta b l e 6 - 5 Calibration error codes and their respective
meanings 171
Ta b l e 7 - 1 DC accuracy ± (% of reading + number of LSD) 178
Ta b l e 7 - 2 Accuracy specifications ± (% of reading + number of
LSD) for true RMS AC voltage 182
Ta b l e 7 - 3 Accuracy specifications ± (% of reading + number of
LSD) for true RMS AC current 183
Ta b l e 7 - 4 Accuracy specifications ± (% of reading + number of
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