FS9952_LP1

Rev. 2.0

14/31

12. Keys Definition

12.1

Range (Auto/Manual Measurement Switch)

Range (S9) key is the auto/manual measurement key that acts with trigger. Power-on default is

auto measurement, and press one time to switch to the manual measurement. In manual

measurement mode, the system will jump up one mode for each press until the highest mode,

then return to the lowest mode as a loop. If press the key over 2 seconds, the system will

switch back to auto measurement status.

12.2

Manual Hold (Reading Hold)

Hold (S8) key is the reading hold key that acts with trigger. The function is to hold the display of

reading. To press the key, the display value will be locked and keep unchanged. To press the

key again, the locked status will be erased and enter the normal measurement status.

Note: After auto power-off, if pressing HOLD key to wake up the system, the auto

power-off function will be cancelled.

12.3

MAXH (Maximum Value Hold)

MAX H (S11) is the maximum value hold key that acts with trigger. After pressing the key, A/D

will keep working, and the display value are always updated and kept the maximum value.

(The actual gained value is not the peak value, but maximum value. For the peak value, it is

necessary to add up the peak oscilloscope in external circuit).

12.4

BLCTR (Backlight Control)

BLCTR (S7) is the backlight control key that acts with trigger. When press the BLCTR key over

approximately 2 seconds, the backlight will be on. To press the BLCTR key again over 2

seconds, the backlight will be off.

12.5

Select (Function Switch)

Select (S10) is the function select key that acts with trigger. Use the key as the switch of DC /

AC, Ohm / Diode / Beeper and ℉ / ℉.

12.6

RST (Reset Key)

RST key is the reset key that acts with trigger.