Powering On; Viewing Sound Pressure Level (Spl); Powering Off; Figure 1-2: Powered On With Spl Screen Displayed - 3M SD-200 User Manual

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Powering on

Powering on
Press
When powered on, a self test screen flashes with country code and revision level (e.g. U1.0)
and exchange rate (e.g.3 L

Viewing Sound Pressure Level (SPL)

The measurement screen will display the current Sound Pressure Level (SPL) in dB or the
previously viewed screen prior to powering off.
 Note: no screen indicator appears for SPL.
Battery icon
If icon appears,
this indicates battery
is low and requires
charging
On/Off key
To power On/Off,
press and hold for
about 2 seconds

Powering off

Once powered off, the SD-200 will save the instrument's settings and measurements which
are displayed again when powered back on. The SD-200 will not power off while in run mode.
1. Press and hold
the instrument powered on.
 Note: while in run, the instrument will not power off until stop is pressed. If the
instrument powers off due to low battery, it will store the last viewed measurements.
(See "Resetting" for more information.)
key until the LCD turns on. (Warm-up time is about 5 seconds.)
/5 L
EQ AVG

Figure 1-2: Powered on with SPL screen displayed

key until OFF disappears. Releasing within two seconds will keep

Figure 1-3: Power off screen indication

). Then a measurement screen appears
Indicator examples
Slow time response and A frequency
weighting indicators
SPL measurements
Value is displayed with no screen indicator
.