Metrix+ 725A+ Instructions

725A+ AC/DC Clamp Meter Instruction
Ⅰ. INTRODUCTION
This True RMS digital clamp meter has a 3999-count LCD for
measuring AC current, DC and AC voltage, capacitance, resistance,
frequency, diode, and continuity with a buzzer sound. It can also
measure temperature with a range of -50 – 1,000 °C. Inrush current
measurement (80ms RMS) can show the current spike when an
appliance is first turned on.
The non-contact voltage tester makes it very convenient to check if a
circuit has power or not.
It is an ideal tool for measuring and monitoring electronic appliances,
electrical equipment, and household appliances.
Ⅱ. SAFETY STANDARD
The meter complies with the safety requirements of EN61010-1
CATIII 600V. Please read before use:
1. The testing AC or DC voltage should not be more than the
maximum voltage (600V) of the meter.
2. In general, voltage less than 36V is considered safe. If the voltage
is more than DC 51V or AC 36V, check the test leads to ensure that
they are connected correctly and free from defectives.
3. When changing the functional measuring range, the test lead
should be away from test point.
4. The function and the range should be selected before use.
5. Safety symbols:
Warning!
Risk of High Voltage and Electric Shock!
Ⅲ. FEATURES
3.1 General
3.1.1 Measurement method: True RMS
3.1.2 Maximum display count: 3999 or 9999
3.1.3 Maximum clamp conductor diameter: opening diameter 27mm
3.1.4 Auto negative polarity indication: Displays "-"
3.1.5 Low battery power: displays "
3.1.6 Auto power off
3.1.7 Work environment: 0C-40C, 75% RH
3.1.8 Storage environment: -10C-60C, 85% RH
3.1.9 Battery: AAA 1.5V×2
3.1.10 External dimensions: 213 (L) × 80 (W) x 35 (H) mm
3.1.11 Weight: About 240g (including battery)
3.2 Technical specifications
Accuracy: ±(% reading + digit); calibration term is one year.
Ambient temperature: 23C±5C; Ambient humidity: ≤70%RH
3.2.1 DCV
Range Accuracy
400mV
4V
40V ±(0.5%+5d)
400V
600V
3.2.2 ACV
Range Accuracy
400mV
4V
40V ±(1.2%+5d)
400V
600V
Frequency: 10Hz-1kHz (Warning： Frequency for square wave accuracy
is specified from 10Hz to 400Hz)
Display: True RMS (sinusoidal waveform RMS calibration)
3.2.3 DCA
Range Accuracy
400A
±(2%+10d)
600A
3.2.4 ACA
Range Accuracy
400A
±(2%+10d)
600A
AC Conversion Type: True RMS RMS (Sinusoidal Waveform RMS
Calibration). Frequency Range:50-60Hz.
"
Resolution Input Impedance
0.1mV >100 MΩ
1mV About 10MΩ
10mV About 10MΩ
100mV About 10MΩ
1V About 10MΩ
Resolution Input Impedance
0.1mV >100 MΩ
1mV About 10MΩ
10mV About 10MΩ
100mV About 10MΩ
1V About 10MΩ
Resolution
100mA
1A
Resolution
100mA
1A
3.2.5 Resistance 
Range Accuracy
400Ω
4kΩ
40kΩ ±(1%+3d)
400kΩ
4MΩ
40MΩ ±(1.5%+5d)
Overload protection: effective value 220V.
3.2.6 Capacitance
Range Accuracy
10nF ±（3%+20d）
100nF
1uF
10uF ±（3%+5d）
100uF
1000uF
10mF ±（5%+5d）
Overload protection: effective value 250V.
Note: In the 10nF range, capacitance below 20pF cannot be measured.
3.2.7 Frequency (AC V <30V)
Range Accuracy
100Hz
1kHz
10kHz
100kHz ±（0.5%+3d）
1MHz
10MHz
40MHz
Overload protection: effective value 250V. Input sensitivity RMS: 1V.
For AC V >2V, use AC V frequency measurement mode. It can
measure 10Hz – 100KHz.
3.2.8 Duty
Range Accuracy
1%~99% ±（0.5%+3d）
Overload protection: effective value 250V. Input sensitivity RMS: 1V
3.2.9 Temperature
Range Resolution
-50 – 300 ℃ 1 ℃
301 – 1000 ℃ 1 ℃
-58 – 600 °F 1 °F
601 – 1832 °F 1 °F
Temperature sensor: K WRNM- 010 bare contact thermojunction
Overload protection: effective value 250V.
3.2.10 Diode Test
Displays approximate forward voltage drop of the diode. Measuring
condition: forward direct current is 1.5mA; Open DC voltage is ~3V.
3.2.11 Continuity Test
If the resistance between two tested points is less than 90±30, the
buzzer will sound. Test condition: Open-circuit voltage is ~0.5V.
Ⅳ．OPERATIONS
4.1 Control Panel
(1) Jaws. (2) Trigger (3) Rotary Switch/Selector Dial: This switch is
used to select the following functions: current, voltage, capacitance,
resistance, forward voltage drop of diode, continuity and turns
ON/OFF the meter. (4) "SEL" Button: Used to select functions. (5)
"RAN" Button: This Range button is used to manually select the
measurement range of a test function. (6) The DH/LIGHT button: Data
Hold and back light control button Press this button once to lock the
current reading on the LCD. The "DH" symbol will be displayed. Press
this button again to cancel the hold function, and the "DH" symbol will
disappear. Long press "DH" for 2 seconds to turn on or off the
backlight. The backlight will turn off after 10 seconds of inactivity. (7)
LCD Display. (8) "V/" Jack: This is the positive input terminal for
voltage, resistance, capacity, and diode measurements. (9) "COM" Jack:
Resolution
0.1Ω
1Ω
10Ω
100Ω
1kΩ
10kΩ
Resolution
0.001nF
0.01nF
0.1nF
1nF
10nF
100nF
1uF
Resolution
0.01Hz
0.1Hz
1Hz
10Hz
100Hz
1kHz
10kHz
Resolution
0.1%
Accuracy
±(1%+5)
±(1.9%+15)
±(1.2%+6)
±(1.9%+25)