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3M™ Protégé Plus
Portable, reusable, single-Gas Monitor
OPERATION
087-0065, Rev D/February 2019
5-3
5.3. Backlight
Backlight LEDs (white) illuminate the LCD for better viewing. They automatically turn on during an
alarm condition or other critical moment. When the device is in the operating mode, pressing the
Left or Right Button will illuminate the LCD for five (5) seconds.
5.4. Activating the Monitor
To activate the detector, press and hold the Left Button until the countdown timer has completed
and RELEASE appears on the LCD.
5.5. Self-Test
The monitor starts and runs through a self-test. During the procedure ensure the following occurs:
• LCD displays
PWR ON
• Monitor emits one audible beep
• LED lights for (1) one second
• Monitor vibrates for (1) second
The LCD shows the self-test sequence while the detector initializes. The sensor installed in the
detector defines which gas type is shown on the LCD.
View Alarm
Settings
Right
Press the right button when
viewing peak or TWA value
View high, low, STEL, TWA and peak
gas exposures
Zero
Calibration
Press and hold right button
in gas monitoring mode
Initiate the calibration
Cancel oper-
ation
Press right button when
operating
Cancel the operation. For example, can-
cel the calibration or bump test.
Turn Off
Both
Press and hold both buttons
until the countdown is com-
plete
Deactivate the monitor
NOTE: The time interval (5 seconds here) depends on the Backlight On time setting value.
The default setting is 30 seconds. The administration sets the backlight duration via
the software. Refer to the Portable Gas Detector (PGD) Application Software User
Guide (P/N 087-0061).
NOTE: Only power up the detector in an non-hazardous environment of 20.9% oxygen. If
the Operation Button is held after RELEASE displays the device will not turn on.
WARNING: IF THE MONITOR DOES NOT OPERATE IN THIS FASHION, DO NOT USE.
TAG IT OUT OF SERVICE. FAILURE TO HEED THIS WARNING COULD
RESULT IN SERIOUS INJURY OR DEATH.
Table 5-2: Operation Buttons
Function
Button
Action
Description