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. The annunciator ‘m’ for meters (for lux
measurement) or ‘ft’ for 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 ENTER key to perform the luminous intensity measurement. The ‘cd’ (for
candela) 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 display reads ‘CLr’ indicating that the memory banks have been cleared (erased).
MANUAL DATA RECORD
1. Each time the MEM key is pressed with the meter turned on, a data record is recorded.
The display will show ‘M’ 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 memory recall mode. The display will show ‘R’ and
the address 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.
AUTO POWER OFF Feature
To conserve battery life, the EA33 automatically turns off after several minutes. To defeat
this feature:
1. Turn the meter OFF.
2. Press and hold the HOLD key while turning the meter ON.
3. The AUTO POWER OFF feature will now be disabled.
4. Note that AUTO POWER OFF is re-enabled each time the meter is turned on.
5. Also note that AUTO POWER OFF is always disabled in the Integral Illuminance mode.
7
EA33 V2.0
06/06
EXTECH [ EXTECH INSTRUMENTS CORPORATION. ]
