3M 1100 SLM User Manual - Calibration
Checking the battery
Calibration
056-652, Rev.D
1100/2100 SLM models
7
NOTE: If the RESET and CAL buttons are continuously held down after
the dashes appear, the unit will interpret this as a command to exit
calibration level set mode and exit without changing the calibration level.
3.
To edit the level, use the RESET key to increase the value and the CAL key
to decrease the value. Edit the value to match your calibrators output.
4. When the desired calibration level is displayed, press and hold both the
RESET and CAL buttons until dashes appear on the display. The new
calibration level is now stored in the instrument's memory and will not have
to be changed again unless an alternate calibrator is used.
Calibration
The model 1100 may be calibrated in any range based on your calibrator's output.
There is no warm up period required, but for maximum accuracy calibration of the
model 1100 should be performed at the temperature of the environment to be
measured. To calibrate, perform the following procedure using a Quest calibrator.
It is recommended that calibration be performed before each use.
Calibration
1. Check to see that the LOB AT indicator is not on.
2. Check to see that the calibrator SPL output matches the calibration level
stored in the meter. If it does not, use procedure outlined in “Changing the
calibration level”
NOTE: Failure to match calibrator output level to calibration level stored in
the 1100 will result in erroneous SPL reading.
3. Turn the calibrator ON. If optional, set the frequency to 1 KHz.
4.
Place the black adapter ring fully onto the microphone.
5. Set the model 1100 to SPL, SLOW or FAST, and A or C weighting. Set
the measuring range so that the calibration level falls within it.
NOTE: Attempting to calibrate out of range will result in an "Err" on the
display and a failed calibration. The previous calibration data will remain in
the instrument.
6. Press the CAL button. “CAL” will appear on the display followed by
moving dashes. After about 2 seconds the display will show either a "P" for
pass or an "F" for fail. If the calibration fails, check settings and repeat
procedure.
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 described above in
“Calibration”.