4
PB
3. OPERATING INSTRUCTIONS
3-A. MEASURING PROCEDURES
- See section 2, page 3 for button
locations and descriptions.
• Connect the
BNC PLUG
(4) to the
BNC SOCKET
(5).
• Slide the
PROBE HANDLE
(3) into the
PROBE HOLDER
(2) (opt).
• Press the
POWER
(7) button to turn the unit on.
• The default mode is: Auto range, “A” frequency weighting and
Fast time weighting.
• To change the frequency weighting, press the
A/C
(11) button.
• The “A” frequency weighting simulates human ear response. For an
environmental sound measurement, select the “A” weighting.
• The “C” weighting approximates a flat response. Often, “C” is used
to check the noise of machinery where the target sound level is
already known.
• For more information about Frequency Weighting Characteristics, see the
chart on page 8.
• Point the
MICROPHONE
(1) at the sound source.
• Use the auto range setting (default) or find the appropriate range using the
RANGE
(13) button.
• The manual selections are: 30 to 80dB, 50 to 100db, or 80 to 130db.
• If “- - - - -” is displayed, switch to another range. The sound level is
displayed in decibels (dB).
• For general applications, press the
FAST/SLOW
(12) button to select
“Fast”, simulating the human ear’s response time.
• The “Slow” setting is generally used to obtain an average of vibrating
sound levels.
• Press the
POWER
(7) button to turn the unit off.
3-B. HOLD
• During the measuring procedure, press the
HOLD
(8) button
to freeze the display.
• “HOLD” and the last measurement are displayed.
• Press the
HOLD
(8) button again to exit this function.
3-C RECORD MAXIMUM / MINIMUM MEASURMENTS
• Press the
REC MAX/MIN
(9) button once to enter the
recording mode. “REC” and the recorded values are displayed
and continuously updated.
• Press the
REC MAX/MIN
(9) button as needed to view the recorded Max
and Min values. “REC Max” and the maximum recorded value, or “REC
Min” and the minimum recorded value
are displayed.
