Amprobe PM51A Digital Multimeter

Small, economical digital multimeter with frequency and capacitance measurement.

Retired products cannot be ordered

The Amprobe PM55A Digital Multimeter is the suggested replacement

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Part Number

PM51A

Manufactured

By Amprobe

Includes

FREE Ground Shipping on orders of $1,000 or more
FREE Lifetime Tech Support

Product Manual Product Specs

Features

Measures: AC & DC voltage, resistance, continuity w/beeper, capacitance, frequency
Autoranging w/ 7 measurement functions
27 measurement ranges
Display: 3-3/4 digits, 4000 count
Data hold function freezes value on display
CAT III 300 V, CAT II 600 V safety ratings
UL approval

The Amprobe PM51A is a shirt-pocket sized digital multimeter that is only 3/8" thick and weighs less than 3 ounces. Offering full functionality in a tiny package, the PM51A is fully safety rated to CAT III 300 V, CAT II 600 V and is UL approved. No other meter offers such small size with high performance and safety ratings.

The Amprobe PM51A features AC and DC voltage measurement to 600 V, resistance to 40 MΩ, capacitance to 3000 µF, frequency to 1 MHz, continuity w/beeper and diode test. Fully autoranging, this meter offers seven different measurement functions with 27 full ranges of measurement. The digital display is oversized with large digits and annunciators.

Amprobe PM51A digital multimeters ship complete with:

Battery
Manual
Attached test leads

Amprobe PM51A Digital Multimeter Specifications

Function	Range	Accuracy
DC Voltage
	400 mV	±(1.0% rdg + 2 dgt)
	4.000 V, 40.00 V, 400.0 V	±(2.0% rdg + 2 dgt)
	600.0 V	±(2.5% rdg + 4 dgt)
NMRR	> 50 dB @ 50 Hz/60 Hz
CMRR	> 120 dB @ dc, 50 Hz/60 Hz;Rs=1 kW
Input Impedance	10 MΩ, 30 pF nominal; (1000 MW for 400.0 mV range)
AC Voltage
50 Hz - 60 Hz	4.000 V, 40.00 V, 400.0 V	±(2.0% rdg + 5 dgt)
60 Hz - 500 Hz	4.000 V, 40.00 V, 400.0 V	±(3.0% rdg + 5 dgt)
50 Hz - 500 Hz	600.0 V	±(3.5% rdg + 5 dgt)
Input Impedance	10 MΩ, 30 pF nominal
CMRR	> 60 dB @ dc to 60 Hz, Rs=1 kΩ
Capacitance
	500.0 nF, 5.000 µF, 50.00 µF
	500.0 µF, 3000 µF ^{1 3}	±(3.5% rdg + 6 dgt⁴)
¹Additional 50.00 nF range accuracy is not specified
³Updates > 1 minute on large values
⁴Specified with battery voltage above 2.8 V. Accuracy decreases gradually to 12% at low battery warning voltage of approx. 2.4 V.
Resistance
	400.0 Ω	±(1.5% rdg + 6 dgt)
	4.000 KΩ, 40.00 KΩ, 400.0 KΩ	±(1.0% rdg + 4 dgt)
	4.000 MΩ	±(1.5% rdg + 4 dgt)
	40.00 MΩ	±(2.5% rdg + 4 dgt)
Open circuit voltage	0.4 V DC typical
Frequency
	400 Hz, 4 kHz, 40 kHz, 400 kHz, 1MHz¹	±(0.5% + 4 dgt)
¹Specified at input voltage < 20 V AC RMS input signal: Sine-wave, or square-wave with duty cycle > 40% & < 70%
Diode tester
Test current (typical)	0.25 mA
Open circuit voltage	1.6 V DC
Audible continuity tester
Open circuit voltage	0.4 V DC typical
Audible threshold	65 Ω ±55 Ω