GW Instek GDM-452 - Manual

About 3V (for 200Ω range);
1. 30 ranges for function selection;
2. Over-range display: "1";
3. Display count: 19999;
4. Fast-acting fuse protection for current ranges: 200mA and 10A;
5. Full-range overload protection;
6. Auto power off;
7. Temperature range:
Operating: 0℃~ 40℃(32℉ ~ 104℉);
Storage: -10℃~ 50℃(14℉ ~ 122℉);
8. Altitude: ≤ 2,000m;
9. Low Battery Indication: “ ” displays;
10. Dimensions: 186Ч91Ч39mm;
11. Weight: About 300g (not including test leads).
Ⅰ． Introduction
Ⅲ． Product Features
Ⅳ． Technical Specifications
The GDM-452 is a 20000-count handheld digital multimeter
with remarkably stable and reliable operation. It is mainly
supported with a dual integral A/D converter based on CMOS technology
and also offers overload protection for all ranges. This model can
measure DC&AC voltage, DC&AC current, resistance, capacitance,
diode, transistor, frequency and continuity.
Ⅱ． Safety Information
The GDM-452 is designed and manufactured in compliance with:
IEC61010-1, CATⅠ1000V, CATⅡ600V and CATⅢ300V overvoltage
standards.
Warnings
Use the meter as specified in the manual , otherwise the protection
offered by the multimeter may be impaired.
● Do not use the multimeter with back cover opened, it may cause
electric shock.
● Set to a proper range for your measurement.
● Check the test leads for any damaged insulation or broken wires.
● Insert red and black test leads into proper input terminals and ensure
good contact between them.
● Do not input signal beyond the rated values of the multimeter,
otherwise it may cause electric shock or damage to the multimeter.
● Prohibit switching the range during the voltage or current
measurement, for it may cause damage to the multimeter.
● Please use replacement parts with the same model or similar electrical
specifications.
● To avoid electric shock, Do not apply any voltage above 1000V
between COM and grounding.
● Please take caution when working voltage goes above 60VDC or
30VAC RMS.
● To ensure the accuracy, please replace the batteries as soon as
appears.
● Shut off the power timely after the measurements complete. Take out
the batteries if not used for a long time.
● Do not use the multimeter in places exposed to high temperature, high
moisture. The performance of the multimeter may be compromised if
moisture-affected.
● To prevent damage to the multimeter or personal injury, do not alter
internal wiring randomly.
● Clean the multimeter casing with slightly damped soft cloth and mild
agent. Do not use any abrasives and corrosives.
International Electrical Symbols
Low Battery Indication
Double Insulated
Conforms to European Union Standards
b digits
DC Voltage
AC Current
Resistance
Capacitance
Frequency
Diode and Continuity
AC Voltage
DC Current
AC RMS
AC RMS
True RMS v
RMS
Note: please short-circuit the test leads when using 200 Ω range to
measure, and subtract this shorted value from all subsequent measured
values so as to obtain accurate reading.
Display approximate value
of forward voltage drop for
diode
If resistance≤30Ω, the
buzzer sounds; Display
approximate kΩ value.
GDM-452
Effective average value