Operation; Automatic And Manual Range; Mode Button - Extech Instruments EX505A User Manual

5

Operation

NOTE
Read and understand all Warning and Caution statements in this user manual prior to use.
Set the function switch to the OFF position when the meter is not in use.
On some low AC and DC voltage ranges, with the test leads not connected to a device under
test, 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 con-
nected to a circuit.
Risk of electrocution. High-voltage AC and DC circuits are extremely dangerous and
should be measured with great care.
• ALWAYS turn the function switch to the OFF position when the meter is not in use.
• If OL appears on the display during a measurement, the reading exceeds the selected
range; change to a higher range.

5.1 Automatic and Manual Range

In the current, voltage, resistance, and capacitance modes, the meter auto-
matically selects the optimum range. To use manual range instead, follow the
steps below.
1. Press the RANGE button. The AUTO display icon will switch off.
2. Now use the RANGE button to step through the available ranges.
3. To return to the automatic mode, long press the RANGE key, the AUTO
icon will reappear.

5.2 MODE Button

The MODE button allows you to select an alternate unit of measure or func-
tion, as listed below.
• Select DC or AC in the voltage and current modes.
• Select resistance, diode, continuity, or capacitance.
• Select ℃ or ℉ in the Temperature mode.
#NAS100177; r. AD/97993/98002; en-US
WARNING
CAUTION
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