SPECIFICATIONS
MEASUREMENT PROCEDURES
1. Open the cover
by pressing and
holding the Case
Lock button.
2. Turn the selector to the appropriate
measurement range. If the
measurement is over range,
“4000” displays and the “4” blinks.
3. Aim the probe’s sensor toward
the light source to be measured.
4. Optionally, the probe can be
snapped into a fixed position
during the measurement, as
shown below.
Note: The reference plane is located
at the top of the sensor.
5. Activate or exit the Data Hold
function by pressing the Case Lock
button. “DH” appears in the display
when this function is engaged.
6. Turn the selector to OFF when
the measurement is complete.
7. Store the probe so the sensor
faces up. Take care not pinch the
probe’s wire in the unit’s cover.
AUTOMATIC SHUT OFF
The instrument has an automatic
shut off function in order to prolong
battery life. After approximately 30
minutes without activity, the meter
will automatically shut off. When
this occurs, turn the range selector
to OFF for about 2 seconds before
selecting a measurement range.
CONSIDERATIONS
- Clean the sensor with a soft dry
cloth.
- Turn the selector to OFF after use.
- To protect the sensor, store the unit
with the cover closed.
- Do not expose the unit to excess
direct sunlight, shock, vibration,
humidity, or extreme temperatures.
- Fluctuations in the reading may
be due to shadows or changes in
the line voltage. Do not move the
probe’s cord during measurement.
Ambient temperature and drafts
also affect the luminous flux output.
- Avoid Range Overload.
- Opening the case, except for
replacing the batteries, will void
the warranty.
BATTERY REPLACEMENT
Replace the batteries when
“BT” appears in the display.
Remove the battery compartment
cover using a screwdriver. Insert the
fresh batteries (match the polarity)
and replace the cover.
Remove the batteries when the
instrument will not be used for a
prolonged period of time.
CALIBRATION
The light sensitivity of the sensor
decreases with use. Under average
conditions, annual calibration is
recommended. For complete
details and current fees contact
Sper Scientific.
