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. Press the SET key; ‘SEt01’ will appear on the display.
2. Press the down arrow key four times to select the ‘SEt05’
parameter. ‘COMP’ appears.
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. Press the ENTER key to begin setting the Comparator HIGH limit value. The ‘+’ symbol
will 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 AVG key. The ‘AVG’ display icon will appear.
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
AVG
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.
6
EA33 V2.0
06/06
EXTECH [ EXTECH INSTRUMENTS CORPORATION. ]
