5
PB
NOTE:
The Max/Min values are frozen and not updated until the meter returns to
recording mode.
• To return to recording mode, press the
HOLD
(8) 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
(9) button for at least 2 seconds.
3-D. MAX HOLD: (Holds the max measurement on the display.)
Press the
MAX HOLD
(10) button, “P.H” appears on the LCD.
Press the
MAX HOLD
(10) button again to exit this function.
NOTE:
Select auto range when using this function in slow varying noise
environments. Select the appropriate manual range when using this function
in pulsing noise environments.
3-E. AC OUTPUT
The 3.5 mm diameter
AC OUTPUT
(14) may be used to connect the unit to
an external output device, such as an analyzer, recorder, or controller.
3-F. CALIBRATION
• The meter’s
CAL
(15) adjustment is located on the side of the unit.
• Use Sper Scientific’s 2 Pt. Acoustical Calibrator 850016 (or equivalent) to
calibrate the unit in compliance with OSHA.
• Press the
POWER
(7) button to turn the unit on.
• Turn the acoustical calibrator on and place it onto the
meter’s
MICROPHONE
(1)
• To calibrate the meter to 94 dB, select the 50 to 100 dB range,
FAST response, and “A” weighting.
• Use the calibration screw driver to gently turn the
CAL
(15) adjustment until
the display reads 94.0.
• To calibrate the meter to 114 dB, select the 80 to 130 dB range, FAST
response, and “A” weighting and turn the
CAL
(15) adjustment until the
display reads 114 dB.
3-G. PRECAUTIONS
• Do not store or operate the unit in high temperatures or in
high humidity for long periods.
• Keep the microphone dry.
• Do not force the
CAL
(15) adjustment, doing so may damage
the mechanism and void the warranty.
