3M 718A Руководство пользователя - Страница 6

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The 3M

Static Sensor 718 is a precision electronic instrument. Improper use

™

or rough treatment can damage the unit, and render it incapable of providing

accurate measurements.2.2.4 Replace the cover. 2.3 The Static Sensor 718 has a

Low Battery indicator. Once the battery is depleted to approximately 6.5 volts,

the instrument will show BAT in the display. At this time, the Static Sensor 718

will not produce accurate results and the battery should be replaced.

3.1 Turning the unit ON and OFF: To turn on the Static Sensor 718,

momentarily press down on the membrane switch labeled POWER.

Determining that the power is on can be verified by seeing that the liquid

crystal display (LCD) is on, and that the red light-emitting diodes in the

front of the sensor are lit. To shut off the Static Sensor 718, momentarily

press down on the membrane switch labeled POWER. Determining that the

power is off can be verified by seeing that the liquid-crystal display (LCD) is

off.

3.2 Making Electrostatic Voltage

Measurements: hold the instrument

1-inch (2.54 cm) away from the object

being measured. The display will

update with the voltage measurement

in kilovolts. If the measured voltage is

greater than the measurement range of

the instrument, a -1. will be displayed.

At this time, switch to a greater range.

If over-ranging occurs even with the

high range activated, the static charge on

the object cannot be measured with the

Static Sensor 718.

3.3 Measurement Range: all measurements are in kilovolts (kV) as stated

on the front label of the unit. The Static Sensor 718 has two measurement

ranges: 0-1,990 kV and 0-19,900 kV . The unit's current measurement

range mode can be verified by checking the display. Three digits following

the decimal point indicate that the unit is in 0-1,990 kV range. Two digits

following the decimal point indicate that the sensor is in 0-19,900 kV range.

To change between measurement ranges, press the RANGE/HOLD button

once, momentarily.

3.4 HOLD Function: in the event that the user wishes to freeze the current

measurement, the HOLD function of the Static Sensor 718 may be used.

Simply press the HOLD switch momentarily and the currently displayed

voltage will be frozen. A HOLD notice will also be displayed to alert the

user that the instrument is currently in HOLD status. To unfreeze the display