optimus sound level meter user manual
Page 42
1.
Unscrew the screw holding the battery cover on, using a coin or the keyring
provided
2.
The battery, type 6F22 (PP3) 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
at the contact with the larger cut out.
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 turn on.
A discharged battery may allow switch-on but will soon drop in voltage and indicate
low battery or switch off.
Specifications
Frequency
1kHz ± 1%
Sound Level
94dB re 20
μ
Pa
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 108kPa
Operating Temperature
-10
o
C to +70
o
C
Storing Temperature
-20
o
C to +70
o
C
Effective Volume
6.19 cm3 ± 0.2 cm
3
Cavity Diameter
0.525 inch
Battery
1 x 9v 6F22 (Neda 1604)
Battery Life
Approx 15 Hours Continuous Use
Battery Voltage
9v Nominal (10v Maximum, 6.4v Minimum)
Weight with Battery
185g
Dimensions
135mm x Ø48mm
Technical Information
The normal mode of operation of the calibrator is with the unit switched on.
