Amprobe PM53A Automatic-Pocket-Meter - Manual (Page 4)

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Introduction
This unique meter has a full complement of features in a compact package only 3/8 inch deep and
weighing less than 3 oz. The essential shirt-pocket size meter for portability, Model PM53A is fully
autoranging and has an oversized, easy-to-read digital display. It offers the AutoTect™ feature that
guides the meter to display AC volts, DC volts or resistance based on what you are measuring. Also
offered is VolTect™, a built-in non-contact voltage detector of AC voltages. Although very small, this
meter is fully UL safety rated to CAT III levels. The Amprobe

PM53A includes measurement extras
such as capacitance, frequency and continuity plus safety extras such as transient protection to 4 kV
and overload protection to either 450 V.
Safety Information
• The PM53A Digital Multimeter is certified for cULus and EN61010-1:2001; CAT II 450 V, CAT III
300 V, class 2 and
pollution deg. 2.
• This instrument is EN61010-1 certified for Installation Category II
(450 V). It may only be used to make measurements on energy limited circuits within equipment
and not directly connected to mains.
• This instrument is EN61010-1 certified for Installation Category III
(300 V). It is recommended for use with local level power distribution, appliances, portable
equipment, etc., where only smaller transient overvoltages may occur, and not for primary supply
lines, overhead lines and cable systems.
• Do not exceed the maximum overload limits per function (see specifications) nor the limits
marked on the instrument itself. Never apply more than 450 V between the test lead and earth
ground.
• Inspect the DMM, test leads and accessories before every use. Do not use any damaged part.
• Never ground yourself when taking measurements. Do not touch exposed circuit elements or test
probe tips.
• Do not operate the instrument in an explosive atmosphere.
• Exercise extreme caution when: measuring voltage >20 V // current >10 mA // AC power line with
inductive loads // AC power line during electrical storms // current, when the fuse blows in a
circuit with open circuit voltage > 450 V // servicing CRT equipment.
• Remove test leads from circuit before opening the case.
• Always measure current in series with the load – NEVER ACROSS a voltage source.