Cirrus Optimus Green Series, Руководство по прибору

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Optimus sound level meter - instrument handbook
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1. Unscrew the screw holding the battery cover on, using a coin or the
keyring provided.
2. The battery can now be eased out of its holder and replaced. The
battery should be eased out terminal side first by pushing against the
spring at the other end.
Ensure that the battery is inserted with the correct polarity, with the negative terminal
in contact with the larger cut out.
9.3.1 Battery type
The battery should be an alkaline battery, not an ordinary dry cell. The battery is 9 volts
when new and will operate the calibrator down to 6.4 volts.
When the battery voltage is below 6.6 volts but above 6.4 volts, the power LED will flash
to indicate that the battery voltage is low. When the battery voltage is below 6.4 volts,
the calibrator will not switch on.
A discharged battery may allow switch-on but will soon drop in voltage and indicate
low battery, or switch off.
9.4 Specifications
Frequency 1 kHz ± 1%
Sound level 94 dB re 20 μPa
Standardisation CR:514 - IEC 60942:2003 Class 2
CR:515 - IEC 60942:2003 Class 1
Distortion Less than 2%
Operating humidity 25 to 90% relative humidity
Operating static pressure 65 kPa to 108 kPa
Operating temperature -10oC to +50 oC
Storing temperature -20oC to +60 oC
Effective volume 6.19 ± 0.2 cm3
Cavity diameter 0.525 inch
Battery 1 x 9 V 6F22 (NEDA 1604)
Battery life Approx. 15 Hours Continuous Use
Battery voltage 9 V Nominal (10 V max, 6.4 V min)
Weight with battery 185 g
Dimensions 135 mm x Ø 48 mm
9.5 Technical information
The normal mode of operation of the calibrator is with the unit switched on.
When the LED indicates that the unit is switched on, the calibrator produces radio
frequency emissions.