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USER'S
MANUAL
BM789
BM786
BM785
Digital
Multimeter

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Summarization of Contents

Safety Guidelines
International Symbols
Common symbols used on electrical equipment and their meanings.
Product Information
European Directives
List of European directives the instrument conforms to.
Product Description
Explanation of manual's use of representative model illustrations.
Operation: Getting Started
Control Panel Overview
Identification of display, buttons, selector, and input jacks.
Operation: AutoV and LoZ
AutoV and LoZ Functionality
Details on using AutoV for voltage detection and LoZ for low impedance.
Operation: ACV, VFD-ACV, dBm
AC Voltage and VFD AC Voltage
Instructions for measuring AC and VFD AC voltages.
Operation: Frequency Measurement
Sensitivity and Trigger Levels
Using sensitivity and trigger levels for frequency measurements.
Operation: Voltage Measurements
DCV and DC+ACV Procedures
Procedures for measuring DC and DC+AC voltages.
Operation: Resistance and Conductance
Resistance and nS Conductance
Performing resistance and conductance measurements.
Operation: Temperature Measurement
T1 and T2 Temperature Inputs
Using T1 and T2 terminals for temperature measurements.
Operation: Current Measurement (Amperes)
Amps Measurement Procedures
Procedures for measuring current in Amps (DC, AC, DC+AC).
Operation: Current Measurement (Milliamperes)
Milliamps and Loop Current Measurement
Measuring current in milliamperes and %4-20mA loop current.
Operation: Electric Field Detection and Backlight
EF-Detection Modes
Using EF-H and EF-L for electric field detection.
LCD Backlight
How to toggle and manage the LCD backlight.
Operation: Ranging and Display Features
Manual vs. Auto-Ranging
Switching between manual and auto-ranging modes.
HOLD and AutoHold
Using HOLD to freeze readings and AutoHold for stable readings.
Operation: Advanced Measurement Modes
MAX/MIN/AVG Record
Recording maximum, minimum, and average values.
CREST Mode (Peak Hold)
Capturing instantaneous peak voltage or current values.
Configuration and Maintenance
Power-on Configuration
Customizing power-on settings like APO and beep tones.
Maintenance and Troubleshooting
Guidance on meter maintenance and resolving common issues.
Battery and Fuse Replacement
Battery Replacement
Steps for replacing the meter's batteries.
Fuse Replacement
How to replace the internal fuses.
General Specifications
Display and Operating Conditions
Details on display, temperature, humidity, and altitude limits.
Electrical Specifications: DC Voltage
DC Voltage Accuracy
Accuracy specifications for DC voltage measurements.
Electrical Specifications: AC Voltage
AC Voltage Accuracy
Accuracy specifications for AC voltage measurements.
Electrical Specifications: Current and Special Functions
LoZ Auto-DCV/ACV Accuracy
Accuracy specs for LoZ Auto-DCV and LoZ Auto-ACV functions.
Electrical Specifications: Resistance and Diode Testing
Ohms and Continuity Tester
Accuracy for resistance measurements and continuity tester.
Electrical Specifications: Capacitance and DC Current
Capacitance Accuracy
Accuracy specifications for capacitance measurements.
Electrical Specifications: AC Current
AC Current Accuracy
Accuracy specifications for AC current measurements.
Electrical Specifications: Special Functions
%4-20mA Loop Current
Accuracy for %4-20mA loop current measurement.
Measurement Modes Specifications
RECORD Mode (MAX MIN AVG)
Specifications for MAX/MIN/AVG recording mode.
LIMITED WARRANTY
Warranty Service Information
Contact details and procedures for obtaining warranty service.