Amprobe DM78B Digital-Multimeter - Manual (Page 6)

2
• Do not operate instrument in an explosive atmosphere.
• Clean instrument with mild detergent only.
Buzzer
Note: The buzzer sounds for function change, Range Lock, Range
Hold, and continuity.
Measuring Procedures
General
Ranging: The meter defaults to autoranging when turned on, and
selects the range automatically. For Manual Ranging: press “Range
Lock” Button to hold selected range (
Z on the display ) Pressing
“Range Lock” again steps to next range. Hold button for 2 sec. to
return to Autorange mode.
Data Hold: Press the “Data Hold” Button to toggle in (“H”
displayed) and out of mode. Last reading is held on the display .
Press button again to release and display present readings.
Selector Switch . When the Selector Switch is in the
Ω RG
position, press the Function Button to step between resistance,
continuity test (
Ω
and R displayed), and diode test (G). When the
Selector Switch is in VOLTS position, press the Function Button to
step between AC voltage and DC voltage.
DC Voltage measurement
W
Warning
For safety, do not attempt to measure voltages greater than
600 VDC.
1. Set function switch to VOLTS
2. If “AC” appears in display , press Function Button to select DC.
3. Connect black test lead to negative side of circuit being measured
and red lead to positive side.
4. Read value on display .
AC Voltage Measurement
W
Warning
For safety, do not attempt to measure voltages greater than
600VAC.
1. Set Selector Switch to VOLTS.
2. Push Function Button so that “AC” appears in display .
3. Connect test leads to circuit. Connection must be in parallel with
circuit being measured.
4. Read value on display .