1
38XR Digital Multimeter
Contents
Safety Information.......................................................................................... 2
Symbols Used in this Manual....................................................................... 2
Introduction.................................................................................................... 3
Making Measurements.................................................................................... 3
Verify Instrument Operation ......................................................................... 3
Range Selection........................................................................................... 3
Correcting an Overload (
o
or
-
o
) Indication
W
.......................................... 3
Measuring DC Voltage .................................................. See Figure -1-......... 4
Measuring AC + DC Voltage (True rms) ................ See Figure
-2- & -3-......... 4
Measuring AC Voltage (True rms) ........................ See Figure
-2- & -3-......... 4
Preparing for Current Measurements............................................................ 4
Measuring DC Current .................................................. See Figure
-4-......... 5
Measuring AC or AC+DC Current (True rms) .............. Figure
-3- & -5-......... 5
Measuring Resistance .................................................. See Figure -6-......... 5
Testing for Continuity ................................................... See Figure
-7-......... 6
Testing Diodes.............................................................. See Figure
-8-......... 6
Measuring Capacitance ................................................ See Figure -9-......... 6
Measuring Temperature ............................................. See Figure -10-......... 6
Measuring Frequency ................................................. See Figure -11-......... 7
Measuring Dutycycle .................................................. See Figure -12-......... 7
Measuring dBm ......................................................... See Figure -13-......... 7
Measuring 4-20 mA Loop Current ............................................................... 7
Additional Features ......................................................................................... 7
Input Test Lead Warning.............................................................................. 7
True-rms Measurements.............................................................................. 8
MIN MAX AVG Measurements...................................................................... 8
Peak Hold Measurements............................................................................. 8
Beeper Off ................................................................................................... 9
Auto Power Off ............................................................................................ 9
REL (Relative) Measurements ...................................................................... 9
HOLD Measurements................................................................................... 9
RS232 Download Software (38SW)............................. See Figure -14-....... 10
Backlight ................................................................................................... 10
Product Maintenance.................................................................................... 10
Battery and Fuse Replacement .................................... See Figure
-15-....... 10
Repair .......................................................................................................... 11
WARRANTY............................................................................................... 12
Specifications ............................................................................................... 12
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