Megger AVO835 - Digital TRMS Multimeter

Key Functionality

CAT III and CAT IV compliance to IEC 61010*

CAT IV surge protection provides the highest protection in the industry when used on high energy electrical installations, as well as normal mains supplies and electrical equipment.

Measurement range

A choice of 600 V or 1000 V measurement range across AC and DC voltage supplies gives the best match to your application at the right price.

Voltage is shown as digital and analogue quantity.

Phase sequence detection (rotation)

Detection of phase sequence identifies incorrectly wired three phase circuits, motors and generators, to make sure operation is correct and prevent damage or possible electric shock.

Input impedance switching

Unique 10 MΩ and 10 kΩ switching, without changing test range, allows fast and safe detection of unintentionally coupled ghost voltages. High input impedance does not load the circuit under test, which prevents any significant influence on the voltage.

However, isolated circuits can exhibit a voltage that is capacitance coupled, but with no low impedance source. A low input impedance of 10 kΩ will collapse an unintentionally capacitance coupled voltage, which correctly identifies an isolated circuit.

Non-contact live circuit detection

Non-contact detection of live circuits, cables and conductors. Dual High / Low sensitivity enables the detection of live circuits from a distance, or pinpoint an individual conductor or circuit.

Detection is provided by visual (flashing display and symbols) and an audible beep.

High frequency interference filtering

Voltage measurements up to 5 kHz are possible. However, the selectable 800 Hz (3 db) filter prevents the interference of high frequency noise, such as those found on variable speed drive circuits.

Live Circuit Detection

Safety compliance to CAT IV 600 V (AVO830) and combined CAT III 1000 V / CAT IV 600 V (AVO835) for use on high energy, low voltage electrical applications.

Measurement tools

A range of tools are available to help in the capture of difficult measurement quantities, including:

• Minimum and Maximum
• Average
• Hold
• Auto hold
• Smoothing of the measured quantity

Overview

• Display
• Function Buttons
• Function Dial
• Terminals

Function Buttons

1. Record minimum, maximum or average values, shown on the Secondary display. Step through MIN, MAX and AVG readings. Press and hold for two seconds to cancel.
2. Toggle through the available options at a selected function.
3. Select automatic or manual range.
4. REL: Captures the current reading and shows it as a reference for subsequent readings on the Secondary display. The Primary display is the difference between the stored reading and subsequent readings. REL %: Captures the current reading and shows it as a reference for subsequent readings on the Secondary display. The Primary display is a percentage of subsequent readings to stored reading. Press and hold for two seconds to cancel.
5. HOLD: Capture the current reading and show the value on the Secondary display. The Primary display shows subsequent readings. HOLD/Auto: Capture the current reading on the Secondary display. When a new stable reading is detected, the instrument beeps and shows the new reading. Smooth: Measurements are refreshed every two seconds and shown on the Primary display. Press and hold for two seconds to cancel
6. Backlight: Set the backlight On / Off (automatically goes Off after one minute)
7. Low Z: Reduce the input impedance down to 10 KOhms during voltage and capacitance measurement. In LPF (Low Pass Filter) mode the instrument continues to measure in the selected AC mode, but the signal diverts through a filter, which blocks unwanted voltages above 800 Hz.

Function Dial

• White symbols: Default function
• Yellow symbols: Other functions

Press MODE repeatedly to select other functions.

1. Resistance Measurement, Continuity Test, Conductance Measurement
2. Capacitance Measurement, Diode Test
3. Frequency Measurement
4. Temperature Measurement
5. AC Voltage Detection, Detects live AC circuit in vicinity (Hi or Lo sensitivity)
6. Current Measurement, AC measurements 0.0 A to 10.00 A, DC measurements 0.0 A to 10.00 A, AC Frequency
7. Milliampere Measurement, AC measurements 0.0 mA to 100.00 mA, DC measurements 0.0 mA to 100.00 mA, AC frequency
8. Instrument Off (battery power Off) APO is active by default
9. Voltage Measurement (AC, DC, or AC+DC)
10. Phase Rotation / Sequence Detection - Phase sequence detection of three phase AC supply

Terminals

For user safety it is important to:

• Always connect the common (COM) probe first and then connect the live probe to the circuit or the instrument
• Always remove the live probe first and then remove the common (COM) probe

1. V - Voltage, Resistance, Diode Capacitance and Voltage Frequency
2. 10 A - ≤ 10 A current measurements and frequency
3. 100 mA - ≤ 100 mA current measurements and frequency
4. COM - Return (Common)