Range Button; Data Hold Button; Relative Button; Operating Instructions - Extech Instruments MN47 User Manual

OPERATING INSTRUCTIONS

WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous and
should be measured with great care.
1. ALWAYS turn the function switch to the OFF position when the meter is not in use.
2. If OL appears in the display, the value exceeds the range you have selected. Change to a
higher range.
NOTE: On some low AC and DC voltage ranges, with the test leads not connected to a device, the
display may show a random, changing reading. This is normal and is caused by the high-input
sensitivity. The reading will stabilize and give a proper measurement when connected to a circuit.

RANGE BUTTON

When the meter is first turned on, it automatically goes into autoranging mode. To manually select
the range to be tested perform the following.
1. Press RANGE button. The AUTO display will turn off.
2. Press RANGE button to step through the available ranges.
3. Press and hold the RANGE button for 2 seconds to exit the manual ranging mode and return to
autoranging.
NOTE: Manual ranging does not apply for Capacitance, Frequency, Diode, Continuity and Duty
Cycle.

DATA HOLD BUTTON

Data hold allows the meter to "freeze" a measurement in the display.
1. Press DATA HOLD button to "freeze" the reading on the LCD. The indicator "HOLD" will appear
on the display.
2. Press DATA HOLD button to return to normal operation

RELATIVE BUTTON

The relative measurement feature allows you to make measurements relative to a stored reference
value. A reference voltage, current, etc. can be stored and measurements made in comparison to that
value. The displayed value is the difference between the reference value and the measured value.
1. Perform any measurement as described in operating instructions.
2. Press the RELATIVE button to store the reading in the display and the REL indicator will
appear on the display.
3. The display will now indicate the difference between the stored value and measured value.
4. Press the RELATIVE button to return to normal operation.
4 MN47-EU-EN-V3.0–12/11