Sper-scientific 840022 Light Meter Advanced Manual de usuario descargar pdf (Pagina 5)

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• 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

1 2 3 4 5 6 7 8

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Sper-scientific 840022 Light Meter Advanced Manual de usuario Pagina 5