Extech Instruments EasyView EA33 User Manual page 6

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Luminous Intensity Feature
Luminous intensity is the measurement of light from a light source at a known distance from the
sensor. The unit of measure is candela (cd).
1. Press the cd/COMP key to begin
feet (for Fc measurement) will appear.
2. Use the up/down arrow keys to set the distance from the light
source to the light sensor. The distance range is 0.01 to 9.99
meters or feet.
3. The measurement must be made in a dark room or in a room with
no stray light.
4. The distance between the sensor and light source must be at least
10 times the size of the light source.
5. Press the
units icon will appear along with the reading.
6. Press the ENTER key again to exit.
Data Record/Recall
MEMORY CLEAR
1. Turn off the meter.
2. Press and hold the MEM key while turning on the meter. Release the MEM key when the
MANUAL DATA RECORD
1. Each time the MEM key is pressed with the meter turned on, a data record is recorded. The
and an audible tone will sound.
2. The counter on the lower left of the LCD will show the number of stored readings.
3. The total memory size is 50 records.
READING STORED RECORDS
1. Press the READ key to enter the
number for the displayed data point.
2. Use the up/down arrow keys to scroll through the stored readings.
3. Press the ENTER key to exit this mode of operation.
RELATIVE - % DEVIATION MODE
The meter can measure light in a relative or comparative manner.
1. Turn on the meter and select the preferred units of measure.
2. Make an initial light level measurement.
3. Press the Relative button (
measurement and display zero.
4. Compare a second light level to the first measurement. The difference in light level between
the first measurement and the second measurement or any additional measurements will be
displayed.
5. Press the Relative button (
measurement and any additional measurements.
6. Press key exit the Relative mode.
www.
/ %) to enter relative mode. The display will save the first
/ %)
again to get the % deviation of light levels between the first
6
.com
(for lux measurement)
(for candela)
EA33-en-GB_v2.5 7/18
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