Minimate Pro Operator Manual 9–43
(2) Select the Right Arrow key to Remove Offsets, or press the Cancel key to return to
the Maintenance Menu.
(3) If you have selected to Remove Offsets, a message appears, “Removing A/D offsets.
Please wait…”
(4) The unit responds with the message, “Offsets removed.”
(5) Press Enter to Continue.
h. Sound Level Microphone Field Calibration
It is the operator‟s responsibility to ensure that the optional Class 1 Sound Microphone
(Part No. 720A5101) is calibrated. The following sound microphone calibrators are
recommended: B & K Type 4231, Deltaohm HD 9101 or Rion NC-74.
(1) Attach the Sound Level Microphone to the Minimate Pro4 or Minimate Pro6,
as shown below:
(2) Select the Setup key on the monitor.
(3) Press the Down Arrow key to scroll and highlight the Maintenance Menu.
(4) Press Enter.
(5) Press the Down Arrow key to scroll and highlight the Sound Level
Microphone Field Calibration. Press the Right Arrow key to accept the
selection.
(6) The Calibrate Sound Level Microphone appears. This menu displays the
following message, “The calibration date will be set to:” and shows the
current date.
(7) Press the Right Arrow key to select the Calibrate command, or press the
Cancel key to return to the Maintenance menu.
(8) If the Calibrate command was selected, a new prompt appears, “Connect
Sound Level Microphone to Channel 4 – Connect and turn on calibration
reference.” Follow the field calibration operator manual instructions and attach
the field calibration device to the end of the microphone.
(9) Press the Right Arrow key to select the Calibrate command, or press the
Cancel key to return to the Maintenance menu.
(10) When complete, the monitor displays one of the following messages:
1) If the measured signal is less than 94 dB: “Error Calibrating Sound Level
Microphone. Calibration reference not detected. Existing Calibration
retained.”
Press the Enter key to continue, or
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