Sper Scientific 840022 Light Meter Advanced User Manual
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3. OPERATING INSTRUCTIONS
3-A. General Measurement
•
Insert the SENSOR (15) plug into the SENSOR INPUT (1) and turn the
meter on by pressing the POWER (3) button.
•
Remove the lens cap from the PHOTO SENSOR (16) .
•
Select the desired unit of measure by pressing the LUX/FC (7) button.
•
Select the lighting type by pressing the SOURCE (10) button. The display
shows “Hg” for Mercury, “Na” for Sodium, and “FL” for Fluorescent Lamp.
For Tungsten and unknown sources use the standard mode - no indicator
appears on the screen.
•
Select the maximum range by pressing the RANGE (9) button. If the out
of range indicator "- - - - " appears, select another range or discontinue
use. For the highest accuracy, select the range that offers the highest
resolution (most number of digits after the decimal point).
•
Point the PHOTO SENSOR (16) toward the source and read the
results on the display.
•
The instrument has an automatic shut off function in order to prolong
battery life. After approximately 10 minutes without activity (no buttons
pushed), the meter will automatically shut off. To disable this feature,
press the REC MAX/MIN (5) button.
•
Press the POWER (3) button to manually turn the meter off.
3-B. Hold
•
During measurement, press HOLD (4) to freeze the measured value.
•
"HOLD" and the value are displayed.
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Press the HOLD (4) button again to exit
.
3-C. Peak Hold
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During measurement, press the HOLD (4) button for 2 to 3 seconds.
•
“Peak HOLD” and the peak value are displayed and updated if exceeded.
•
To erase the peak value, press the HOLD (4) button once (the display will
flash).
•
To exit this function, press the HOLD (4) button for at least 2 seconds.
3-D. Record Maximum / Minimum
•
Press the REC MAX/MIN (5) button once to enter the recording mode.
"REC" and the recorded values are displayed and continuously updated.
•
Press the REC MAX/MIN (5) button as needed to view the recorded Max
and Min values. "REC Max" and the maximum recorded value or "REC
Min" and the minimum recorded value are displayed.
•
Note: The Max/Min values are frozen and not updated until the meter
returns to recording mode.