Extech Instruments MM750W, User Manual, Page: 2 / 22

MM750W-en-GB_v1.1 12/18 2
Table of contents
Introduction ...................................................................................................... 3
FEATURES ............................................................................................................................................... 3
Safety ............................................................................................................... 3
Meter Description ............................................................................................. 6
Control Buttons ................................................................................................. 7
Display Symbols ................................................................................................ 7
Multimeter Operating Instructions .................................................................... 8
AUTORANGING/MANUAL RANGE SELECTION
............................................................................................ 8
MAXIMUM (MAX), MINIMUM (MIN), and MAX minus MIN modes
.............................................................. 8
RELATIVE ZERO MODE ............................................................................................................................. 8
LCD BACKLIGHT ...................................................................................................................................... 9
DATA HOLD ............................................................................................................................................. 9
AUTO POWER OFF (APO) ......................................................................................................................... 9
LOW BATTERY INDICATION
...................................................................................................................... 9
DC VOLTAGE MEASUREMENTS
............................................................................................................... 10
AC VOLTAGE, FREQUENCY, DUTY CYCLE MEASUREMENTS
......................................................................... 10
DC CURRENT MEASUREMENTS .............................................................................................................. 11
AC CURRENT, FREQUENCY, DUTY CYCLE MEASUREMENTS ........................................................................ 12
CLAMP ADAPTOR MEASUREMENTS AC/DC ............................................................................................. 13
RESISTANCE MEASUREMENTS ................................................................................................................ 14
CONTINUITY CHECK
.............................................................................................................................. 14
DIODE TEST
.......................................................................................................................................... 15
CAPACITANCE MEASUREMENTS ............................................................................................................. 15
TEMPERATURE MEASUREMENTS ............................................................................................................ 16
NCV NON-CONTACT (EF) VOLTAGE MEASUREMENTS ................................................................................ 16
Wireless Communication ................................................................................ 17
WIRELESS COMMUNICATIONS OVERVIEW ............................................................................................... 17
INSTALLING A WIRELESS MODULE .......................................................................................................... 17
OBTAINING THE APPLICATION (APP) ....................................................................................................... 17
USING THE APPLICATION ....................................................................................................................... 17
FCC COMPLIANCE
................................................................................................................................. 18
Maintenance .................................................................................................. 18
BATTERY INSTALLATION ......................................................................................................................... 19
FUSE REPLACEMENT
............................................................................................................................. 19
Specifications .................................................................................................. 20