Extech Instruments EX320 Uživatelská příručka stáhnout pdf (Strana 9)

EX320-en-GB_V5.4 12/14

DIODE TEST

1. Set the function switch to the position.

2. Insert the black test lead banana plug into the negative COM

jack and the red test lead banana plug into the positive jack.

3. Use the MODE button to view the icon on the display.

4. Touch the test probes to the diode under test. Forward

voltage will typically indicate 0.400 to 0.700V. Reverse

voltage will indicate “OL”. Shorted devices will indicate near

0V and an open device will indicate “OL” in both polarities.

AUTO-MANUAL RANGE SELECTION

When the meter is first turned on, it automatically goes into the Auto Range mode. This

automatically selects the best range for the measurements being made and is generally the best

mode for most measurements. For measurement situations requiring that a range be manually

selected, perform the following:

1. Press the RANGE key. The AUTO display indicator will turn off.

2. Press RANGE to step through the available ranges until the desired range is selected.

3. To exit the Manual Ranging mode and return to Auto Range, press and hold the RANGE key

for 2 seconds.

MAX MODE

Press the MAX button (the MAX icon will appear on the LCD). The meter will now only display the

highest reading during a test. Each time a higher reading is encountered, the display will update.

Press the MAX button again to exit this mode.

AUTO POWER OFF

The meter will automatically turn off after 15 minutes of inactivity. This will conserve battery energy. To

turn the meter on after an Auto Power OFF, simply turn the rotary switch to OFF and then back to the

desired setting.

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Extech Instruments EX320 Uživatelská příručka Strana 9