Extech Instruments EasyView EA33 Manuel utilisateur
User Manual
EasyView Light Meter with Memory
Model EA33
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2
Introduction
Congratulations on your purchase of the Extech EA33 EasyView Light Meter which measures light
level (luminance). This device measures up to 99,990 Fc and 999,990 Lux and stores up to 50
readings for easy recall. Careful use of this meter will provide years of reliable service.
Meter Description
1. Light measurement display
2. Timer display
3. TIME button
4. HOLD button
5. Unit of measure button (Fc/lux)
6. Enter button
7. Luminous Intensity (cd) / Comparator button
8. READ / Right arrow button
9. Average reading tally display
10. Power ON/OFF button
11. Set button
12. Average button
13. Relative / Percent button
14. Light sensor
15. Left arrow / Memory button
16. Up / Down arrow buttons
Display
1. Relative Mode
2. Comparator Mode
3. Average
4. Data Hold
5. % Relative
6. Candela
7. % Relative
8. fc/lx-hours Integral Illuminance
9. Stray light measurement
10. Time Hold measurement
11. ft/m luminance intensity distance
12. Day-Hour minute-seconds
13. Memory Read
14. Memory location
15. Average Reading tally display
16. Integration cycles
17. Low battery
18. Elapsed time indicator
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Basic Operation
1. With the sensor cover in place, press the button to turn the meter on. The meter will perform
a short self-test.
2. Remove the and place the sensor in the
area to be measured.
3. Press the lux / fc button to select the desired units of measure.
4. Read the light level on the display. If the measurement is out of
range, ation will appear.
5. When the meter is turned on, the elapsed timer starts. The elapsed
timer shows days/hours or minutes/seconds. Use the TIME button
to toggle the view between minutes/seconds (M-S) and days/hours (D-H).
Operation Modes
In addition to the normal mode of operation where light level is measured, there are 5 special
modes, listed below. Each mode is explained in the subsequent sections of this manual. The SET
button is used to access the modes. The number on the lower left of the LCD (after the SET button
is pressed) represents the mode currently selected. Use the down arrow key to scroll to the desired
mode.
Programming modes
Mode Name of mode Description
SEt 01 Stray+ Light Cancels out stray light from light under test
SEt 02 Time - Hold Meter measures while timer counts down.
Reading is held on LCD when counter = 0.
SEt 03 rtC Set the day and time for internal clock
SEt 04 Int Lumen-seconds, lux-hour, and fc-hour
measurements
SEt 05 COMP Measurements are compared to high and low
limits.
MODE 1 - Stray Light Inhibit
This feature allows the user to measure light from one source while
automatically factoring out the light from a secondary (stray) unwanted
source.
1. Turn on the desired li
towards this source (the stray light source should be on also).
2. Press the SET key; SEt will appear at the
center of the LCD and on the lower left of the LCD
(see diagram).
3. Press the ENTER key ( ). The measurement at this point consists of the primary AND the
stray light sources (LIGHT + STRAY).
4. Press ENTER to store this value. STRAY will appear on the display
5. Turn off the primary light source.
6. Press the ENTER key again to store only the stray light source.
7. The meter will now compute and display the light level for only the desired (primary) light source.
also appear on the display.
8. Press the ENTER key to exit this mode.
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MODE 2 Elapsed Timer with Hold
In this mode, measurements are made while the countdown timer is running. When the timer
reaches zero, the last measurement is held on the display (see diagram).
1. Press the SET key; SEt 01 will display.
2. Press the down arrow key to change to the SEt 02 parameter.
-
3. Press the ENTER key to call up the timer.
4. Use the up/down arrow keys to set the desired seconds.
5. Press the ENTER key to program the number of minutes.
6. Use the up/down arrow keys to set the minutes.
7. Press the ENTER key to start the countdown timer. When the timer
counts down, the last reading will be held on the display.
8. Press the ENTER key to exit this mode.
MODE 3 - Real Time Clock Setting
1.
2. Press the d
right of the LCD.
3.
4.
5. Repeat the previous two steps for the minutes , hours , and day settings.
6. Press the ENTER key when finished.
7. Use the TIME key to toggle between minutes-seconds (m-s) and day-hour (D-H) views.
MODE 4 - Integral Illuminance Mode
Integral Illuminance is a luminous energy measurement based on the rate of flow of flux (expressed
in lumen-seconds). The Model EA33 can also measure any photometric quantity on a time
dependent basis. For example, the illuminance could be integrated over time to yield lux-hours (lx-h)
or foot candle-hours (fc-h).
1. Press th SEt 0
2. .
3. Press the ENTER key to start the Integral Illuminance
measurement. The meter will set the first measurement as a
reference. - - appear and the timer
will start (the cycle number appears on the lower left of the LCD).
4. If measurements exceed the reference value, the display will
Note that the timer will also
halt.
5. The maximum indication of integral illuminance is 999999. When
this maximum is exceeded, the integration number (Cycle no. at
lower left of LCD) can be checked. The maximum number of
integration cycles is 99.
6. Press the ENTER key to exit this mode of operation.
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MODE 5 - Comparator Mode
In this mode the meter compares its measurements to one HIGH and one LOW limit. When the high
limit is exceeded, the plus sign appears on the LCD. When the measurement falls below the low
limit, the negative sign appears on the LCD.
1.
2.
parameter.
3. Press the ENTER key to enter the Comparator setting mode.
4. Press the down arrow key to select the desired unit of measure
(Lux or Fc).
5. Press ENTER to begin setting the measurement range.
6. Use the down arrow to select the desired range.
7.
appear.
8. Use the up/down arrow keys to set the high limit value.
9. Press the ENTER key to begin setting the Comparator LOW limit value. The minus symbol will
appear.
10. Use the up/down arrow keys to set the desired LOW limit value.
11. Press ENTER to complete the Comparator setup.
12. Press and hold the cd/COMP key for three seconds to activate the Comparator.
13. Now if a measurement exceeds the high limit, the plus sign will appear. If the low limit is
exceeded, the minus sign will appear. An audible beep will sound when a limit has been
reached.
14. Press the ENTER key to exit the Comparator mode.
99-Point Averaging
Illuminance is the amount of visible light incident upon a specific surface area. Since the EA33
sensor area is small, the Average Mode can be used to measure the illuminance of larger surface
areas; to accomplish this, up to 99 points can be averaged.
1. Press the
2. Press the MEM key to store a reading (up to 99 readings can be averaged). The display at the
lower left will keep a running tally of the readings recorded.
3. Press the READ key to perform the average calculation. The
average value will be displayed and held on the LCD.
4. Pressing the MEM key at this point allows the meter to
continuously average subsequent illuminance readings (the
display will only show an average value).
5. Use the READ button to toggle between this continuous Average
display and the normal measurement display.
6. Press the ENTER key to exit.
AVG
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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 (for lux measurement)
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 (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
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 ( / %) to enter relative mode. The display will save the first
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 ( / %) again to get the % deviation of light levels between the first
measurement and any additional measurements.
6. Press key exit the Relative mode.
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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.
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Maintenance
Cleaning and storage
1. The white plastic sensor dome should be cleaned with a damp cloth when necessary.
2. Store the meter in an area with moderate temperature and humidity (refer to the operating and
storage range in the specifications chart earlier in this manual).
Battery Replacement
When the battery power falls low, the battery symbol will appear on the lower left-hand side of the
battery compartment
screw and accessing the battery compartment. Observe polarity when placing the batteries in the
compartment. Ensure that the compartment cover is securely fastened when finished.
Never dispose of used batteries or rechargeable batteries in household waste.
As consumers, users are legally required to take used batteries to appropriate collection
sites, the retail store where the batteries were purchased, or wherever batteries are sold.
Disposal: Do not dispose of this instrument in household waste. The user is obligated to
take end-of-life devices to a designated collection point for the disposal of electrical and
electronic equipment.
Specifications
Ranges Resolution Accuracy (reading)
Lux
99.99 0.01
± (3% reading + 0.5%FS) 999.9 0.1
9999 1
99990 1 ± (3% rdg + 5 digits)
999900 1 ± (3% rdg + 0.5%FS)
Foot candles
9.999 0.001
± (3% reading + 0.5%FS) 99.99 0.01
999.9 0.1
9999 1 ± (3% rdg + 5 digits)
99990 1 ± (3% rdg + 0.5%FS)
Note: Calibrated to a standard incandescent lamp at color temperature of 2856°K
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General Specifications
Display Multi-function LCD with a maximum display of 999900
Ranging Autoranging over five ranges
Over range indication
Spectral response CIE photopic (CIE human eye response curve)
Spectral accuracy V 1
Cosine response 22%; Cosine corrected for angular incidence of light
Measurement Repeatability ±2%
Temperature coefficient ±0.1% per oC
Sampling rate 5 times per second
Memory 50 manual data points
Photo detector Silicon photo-diode with spectral response filter
Operating conditions Temperature: 0 to 40oC (32 to 104oF); Humidity: < 80%RH
Storage conditions Temperature: -10 to 50oC (14 to 140oF); Humidity: < 80%RH
Meter Dimensions 150 x 72 x 35mm (5.91 x 2.8 x 1.4")
Detector Dimensions 92 x 60 x 29mm ( )
Weight Approx. 11.3 oz. (320g) with battery
Sensor lead length 150cm ( )
Low battery indication Battery symbol appears on the LCD
Power supply
Battery life 200 hours (approx.)
Copyright ©2013-2018 FLIR Systems, Inc.
All rights reserved including the right of reproduction in whole or in part in any form
ISO-9001 Certified
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10
Appendix
Typical Light Levels
Spectral Sensitivity
0
0.2
0.4
0.6
0.8
1
1.2
Wavelength in Nonometers
0
0.2
0.4
0.6
0.8
1
1.2
Light Meter
CIE
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