UEi Test Instruments EM201B - Manual (Page 7)

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4. DYNAMIC MIN/MAX (EM201B ONLY)
The EM201B will capture values for both the minimum and
maximum pressure measured. To reset press MIN/MAX
until the display shows “- CLr”. This will reset the values
stored for minimum and maximum measured without the
need to disconnect and zero the pressure measurement.
Captured values can be displayed in any available scale.
5. HOLD (EM201B ONLY)
The EM201B has a display hold feature. Press this during
reading to freeze the display. Press again to return to
actual measurement.
6. BACKLIGHT (EM201 ONLY)
The EM201B has a backlit display. Press to turn on or
off the back light feature. The back light will stay on until
the button is pressed again (NOTE: using the back light
significantly reduced battery life)
7. OVER RANGE (OL)
If the input exceeds the meter range “OL” will be displayed.
Immediately disconnect from the pressure supply safely to
reduce chances of damage to the instrument.