Amprobe PM51A - Manual (Page 4)

2
Introduction
The PM51A meter is a shirt-pocket size meter only 19 mm (.75 in) wide and weighing less than 85 g
(3 oz). With full functionality offering AC and DC voltage to 600 V, resistance to 40 M#, capacitance
to 300 $F, frequency to 1 MHz, continuity with beeper, and diode test. Fully autoranging, the PM51A
offers seven different measurement functions with 27 full ranges of measurement. The digital display
is oversized with large digits and icons in the display. In spite of its small size, the PM51A is full
safety rated to CAT III 300 V, CAT II 600 V, and is UL listed. No other meter offers this size with such
performance and high safety ratings.
Safety Information
! The PM51A Digital Multimeter is certified for cULus. With test lead tip insulation CAP, the meter is protected
by double insulation per IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/EN61010-2-033 Ed.
1.0, IEC/UL/EN61010-031 Ed.1.1 and CAN/CSA-C22.2 No. 61010-1-12 Ed. 3.0 to CAT III 300V & CAT II
600V; to CAT II 600V only in case of removing test lead tip insulation CAP.
! This instrument is EN61010-1 certified for Installation Category II
(600 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 600 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 > 600 V // servicing CRT equipment.
! Remove test leads from circuit before opening the case.