3M 1200 - Switch Settings for Measurement

1200/2200 Sound Level Meter Operator’s Manual9
3. Turn to calibrator ON. If optional,set the frequency to 1 KHz.
4. Place the black adapter ring fully onto the microphone.
5. Set the model 1200 to SPL, PAUSE, SLOW or FAST, and A or C
weighting. Set the measuring range so that the calibration level falls
within it.
6. If the 1200 has data in the memory, it must be cleared before
calibration is possible. To do this, press and hold the RESET button.
For more details see (RESET Button, section 2.2.6).
7. Press and hold the CAL button until ‘CAL’appears in the display.
Release the button. Three dashes will appear and then disappear one
at a time as the meter calibrates. A final message of ‘PAS’ or ‘BAD’
will appear in the display. If ‘BAD’, review steps one though five.
3.3.1 Calibration Check:
It is a good idea to check calibration after use. To do so, perform the
previous steps 1 through 5. Observe the meter display, it should read the
calibrator level +/-0.5 dB. If out of tolerance, run calibration procedure in
section 3.3.
3.4 Switch Settings to Select Measurement:
T
o Measure: Set Switches to: Display:
SPL SPL, A,C or Z, 1 second update
RUN or PAUSE,
RESPONSE of
interest
LEQ LEQ, A,C or Z, Holds LEQ until RESET
RUN, RESPONSE of or Meter SETTING is
FAST, SLOW OR changed
IMPULSE
MAX HOLD MAX, A,C or Z, Holds MAX until RESET
RUN RESPONSE of or Meter SETTING is
interest changed
Meter Integrity
1200/2200 Sound Level Meter Operator’s Manual 10
Meter Integrity
MIN HOLD MIN, A,C or Z, Holds MIN until RESET
RUN, RESPONSE of or Meter SETTING is
FAST, SLOW OR changed
IMPULSE
During an LEQ RUN, weighting, response, and range switch settings can
not be changed. If these switches are changed, the LEQ measurement will
stop, reset, and start again.