- 5 -
•
To return to recording mode, press the
HOLD
(4) button. "REC" is
displayed without "Max" or "Min".
•
To erase the recorded Max/Min values and exit the recording mode,
press the
REC MAX/MIN
(5) button for at least 2 seconds.
3-E.
Notes and Precautions
•
Avoid range overload.
•
When using PEAK HOLD (3-C) or REC MAX/MIN (3-D) your
measurements must be within the selected range, if not, the out of
range indicator "- - - -" will be displayed.
•
Cover the
PHOTO SENSOR
(16) with the sensor cap when the meter
is not in use.
•
Fluctuations in the reading are often due to shadows or a weak bat-
tery. Also, ambient temperatures and drafts may affect the reading.
•
Do not store in areas of high temperature and/or humidity.
•
Remove the battery for long-term storage.
•
Do not adjust the calibration trimmer beneath the
RS232 Cover
(6).
4. ZERO ADJUSTMENT AND CALIBRATION
•
With the sensor cover securely in place and the meter turned on, use
the
RANGE
(9) button to select the 40.00 Lux range (digits appear).
•
Press the
ZERO
(11) button and the "
0.00
LUX
" should be displayed.
•
To maintain accuracy, annual laboratory calibration is recommended
and available from Sper Scientific.
5. BATTERY REPLACEMENT
•
Replace the battery when the low battery icon is displayed.
•
In-spec measurements may be made for several hours after the low
battery indicator appears.
•
Remove the
BATTERY COVER
(14) screw and slide the cover off.
•
Replace the battery with a fresh 9V battery (alkaline or heavy duty).
6. RS232 PC SERIAL INTERFACE
Use a small screwdriver to gently lift the
RS232 COVER
(6) up to expose
the
RS232 OUTPUT
(8) 3.5 mm terminal. The signal output is a 16-digit
data stream that can be adapted to user-defined applications.
A RS232
lead with the following connection is required to link the instrument with the
PC serial interface.
Meter (3.5 mm jack plug) PC (9W ‘D” Connector)
Center Pin .................................. Pin 4 Pin 2 2.2 K
Ground/shield ............................ Pin 2 Pin 5 resistor