4
3. OPERATING INSTRUCTIONS
3-A. Measurement Procedures
Slide the
POWER (
6) selector to the "I" (on) position.
For general applications, slide the
MAX HOLD / INSTANT
(8) selector to
the INSTANT position.
To freeze the displayed reading, slide the
MAX HOLD / INSTANT
(8)
selector to the MAX HOLD position.
Press the
RESET
(10) button once to reset maximum hold to the current
reading.
Slide the
FREQUENCY WEIGHTING
(11) selector to the "A" or "C"
position. The "A" frequency weighting simulates human ear response.
During an environmental sound level measurement, select the "A"
weighting. The "C" weighting approximates a flat response. Typically,
"C" is used to check the noise of machinery where the target sound level
is already known. (See Frequency Weighting Characteristics, page 6.)
Slide the
TIME WEIGHTING
(7) selector to the "F" (fast) or "S" (slow)
position. For general applications, select "F" which simulates the human
ear's response time.
The "S" setting is used to obtain an average of
vibrating sound levels.
Find the appropriate measuring range using the
RANGE
(5) selector. If
the
OVERLOAD INDICATOR
(3) appears in the upper-left display, slide
the
RANGE
(5) selector to another setting.
Point the microphone at the sound source. The sound level will be
displayed in decibels (dB).
When finished, slide the
POWER
(6) selector to the "O" (off) position.
3-B. General Application Settings
Set
POWER / CALIBRATION
(6) selector to "I" (on).
Set
TIME WEIGHTING
(7) to "F".
Set
MAX HOLD / INSTANT
(8) selector to INSTANT.
Set
FREQUENCY WEIGHTING
(11) to "A".
Set
RANGE
(5) selector to the appropriate range.
3-C. Signal Output
The 3.5 mm diameter
SIGNAL OUTPUT
(12) terminal may be used to
connect the unit to an external device (analyzer, recorder, controller, etc).
3-D. Precautions
Do not store or operate the unit in high temperatures or in a high
humidity environment for long periods.
Keep the microphone dry and avoid intense vibrations.
