Introduction; Safety Symbols - Elenco Electronics M-1000D Operator's Instruction Manual

Safety Symbols

This marking adjacent to another marking,
terminal, or operating device indicates that the
! operator must refer to the explanation in the
operating instructions to avoid damage to the
equipment and/or to avoid personal injury.
This WARNING sign denotes a hazard. It calls
attention to a procedure, practice or the like, which
WARNING
if not correctly performed or adhered to, could
result in personal injury.
This CAUTION sign denotes a hazard. It calls
attention to a procedure, practice or the like, which,
CAUTION
if not correctly adhered to, could result in damage
to or destruction of part or all of the instrument.
This marking advises the user that the terminal(s)
so marked must not be connected to a circuit point
at which the voltage, with respect to earth ground,
500V max.
exceeds (in this case) 500 volts.
This symbol, adjacent to one or more terminals,
identifies them as being associated with ranges
that may in normal use be subjected to particularly
hazardous voltages.
For maximum safety, the instrument and its test
leads should not be handled when these terminals
are energized.
This marking indicates that equipment is protected
completely be the double insulation.

2. Introduction

This meter is a 3 1/2 digit digital multimeter that is rugged,
reliable and convenient to use, while providing all of the
accuracy and features needed for any application.
performs DC/AC voltage, DC/AC current, resistance,
transistor, diode, audible continuity measurement and test
signal. It is designed for technicians and students.
-4-
Transistor h
1. Set the RANGE switch to the h
2. Determine whether the transistor is an NPN or
PNP-type and locate the Emitter, Base and
Collector leads. Insert the leads into the proper
holes of the h
3. The meter will display the approximate h
the condition of base current 10µA and VCE 3V.
Audible Continuity Test
1. Plug the red test lead into the "V Ω mA" jack and
the black test lead into the "COM" jack.
2. Set the RANGE switch to the
3. Connect the test leads to two points of the circuit to
be tested. If the resistance is lower than 100Ω, the
buzzer will sound.
Test Signal Use
1. Set the RANGE switch to the
2. A test signal of 50Hz appears between the "V Ω
mA" and "COM" jacks.
It
approximately 5Vpp with 50kΩ impedance.
Measurement
FE
position.
FE
socket on the front panel.
FE
position.
position.
The output voltage is
-13-
value at
FE