3M PROTEGE PLUS Instruction Manual

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2019 6-1
6. OPERATION
6.1. Operating the Monitor
At start up, the LCD shows the firmware version installed, current date and time, current alarm set
points for each sensor installed, and when the next required calibration is due.
During operation, the LCD displays continuous data on gas concentrations and alarm conditions.
Additionally, you can monitor peak values of gas concentrations.
Figure 6-1: Monitor LCD Indicators
WARNING: IF THE MONITOR FAILS TO RESPOND PROPERLY UPON START UP, OR IF
CALIBRATION IS OUT OF DATE, DO NOT USE THE DEVICE UNTIL IT HAS
BEEN PROPERLY CALIBRATED. FAILURE TO HEED THIS WARNING
COULD RESULT IN DEATH OR INJURY.
WARNING: IF MONITOR DOES NOT OPERATE IN THE MANNER DESCRIBED HERE,
DO NOT USE. TAG IT OUT OF SERVICE. FAILURE TO ENSURE IT IS
PROPERLY OPERATING MAY RESULT IN SERIOUS INJURY OR DEATH.
WARNING: YOU MUST FAMILIARIZE YOURSELF WITH THE ICONS IN BOTH THE
NON-ALARM AND ALARM STATES.
WARNING: IF THE DISPLAY IS MISSING ICONS OR CANNOT BE CLEARLY READ,
PLEASE CONTACT THE 3M TECHNICAL SERVICE.
BUMP CAL
LEL CH4CO PPM
::
H2S PPM
CO2% VOL HCN 10 %
-6
10 %
-6 10 %
-6 PPM
HIGH
LOW
STEL
TWA
4
3
2
5
6
1
1 Sensor Type
2 Calibration Indication
3 Gas Unit
4 Gas Concentration
5 Alarm Condition
6 Real Time Clock
NO2CO2SO2

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2018
6-2
6.2. Operation Buttons
Table 6-2: Operation Buttons describes the use of operation buttons.
Table 6-1: Monitor LCD Icons and Descriptions
Icons Descriptions
Battery Life Indicator
Data Transmission/IRDA Indicator
Man Down Alarm
Flash Memory Indicator
Heartbeat
Pump Icon (optional)
NOTE: The heart beat icon indicates that the monitor is in the gas reading mode and is
working properly.
Table 6-2: Operation Buttons
Function Button Action Description
Turn On
Left
Press and hold the left button until
the countdown is complete
• Activate the monitor
• During gas monitoring mode,
this action will start the bump
test
Clear Peak
Value
Press the left button
• Clear the Peak or TWA value
after checking the values
Cancel Due
Alarm
• Cancel the alarm of sensor
calibration due
View Select
• Confirm calibration or bump
test
• Turn on the backlight

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2019 6-3
6.3. Backlight
The device is equipped with the backlight LEDs (white) for better viewing the LCD. It automatically
turns 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.
Zero
Calibration
Right
Press and hold the right button
until the countdown is complete
• During gas monitoring mode,
start the zero calibration
Cancel
Press the right button
• During gas monitoring mode,
this action will scroll the
options menu (Zero, Span,
Exit)
• Cancel bump test or calibra-
tion
Scroll the
Alarm
Setpoints
• View Span value,
high/low/STEL/TWA alarm
setpoints
View
Sensor
Types
• Scroll down the sensor types
before performing bump test
or calibration
Turn On
Backlight
• During gas monitoring mode,
this action will turn on the
backlight
Stop the
Latched
Alarm
• If the latched alarm option is
enabled and the monitor
alarms, this action can stop
the alarm
Turn Off Both Press and hold both buttons until
the countdown is complete • 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 backlight duration is set by the administration
via the software. Refer to the Portable Gas Detector (PGD) Application Software
User Guide.
Table 6-2: Operation Buttons
Function Button Action Description

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2018
6-4
6.4. Activating the Monitor
To activate the detector, press and hold the Left Operation Button until the countdown timer has
completed and RELEASE displays on the LCD.
The monitor starts and runs through a self-test (refer to Table 6-3: Self-Test Sequence). During the
procedure ensure the following:
• LCD display “PWR ON”
• Monitor emits one audible beep
• LED lights for (1) one second
• Monitor vibrates for (1) second
6.5. Self-Test
When powering up the detector, it goes to the self-test mode.
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.
To start the self-test of the monitor, press and hold down either button for three (3) seconds. Table
6-3: shows the self-test sequence.
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.
WARNING: IF CAL EXPIRED IS DISPLAYED UPON POWER ON START UP SEQUENCE
INDICATING THE DEVICE DOES NOT HAVE VALID CURRENT
CALIBRATION, PRESS THE RIGHT OPERATION BUTTON TO OVERRIDE
AND IMMEDIATELY CALIBRATE THE DEVICE. A DEVICE THAT HAS NOT
BEEN PROPERLY CALIBRATED CAN LEAD TO DEATH OR INJURY.
WARNING: NEVER OPERATE THE DEVICE IN GAS MONITORING MODE WITH THE
CALIBRATION ADAPTER ATTACHED. THIS CAN CAUSE FALSE
READINGS OF DETECTED GASES. FAILURE TO HEED THIS WARNING
COULD LEAD TO DEATH OR INJURY.
NOTE: The displayed value (for normal mode) appearing on the monitor’s LCD, may be
changed using the Portable Gas Detection (PGD) Application Software.

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2019 6-5
Table 6-3: Self-Test Sequence
LCD Results
Scott logo
Firmware Version
Year Month and date
Real Time
High alarm setpoint
Low alarm setpoint
STEL alarm setpoint
TWA alarm setpoint
Span value setpoint
Bump test due days
Calibration due days
When a self-test is successful the monitor turns to the gas monitoring
mode.
::
CO PPM
H2S PPM
O2%
HIGH
CO PPM
H2S PPM
O2%
LOW
CO PPM
H2S PPM
O2%
STEL
CO PPM
H2S PPM
O2
TWA
LEL CO PPM
H2S PPM O2
%
%
BUMP
CO
H2S PPM
O2%PPM
CAL
CO
H2S PPM
O2%PPM
CO PPM
H2S PPM
O2%
::

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2018
6-6
6.6. Checking Gas Exposures
After a successful self-test, the detector automatically goes into the Gas Monitoring Mode, in which
the user can view the Peak High, Peak Low, STEL and TWA values.
6.7. Configuring the Monitor Parameters
This section describes the various monitor parameters that are configurable.
The various parameters are shown in Figure 6-3: Monitor Configurable Menu and detailed in Table
6-5: Monitor Configuration Parameters. These parameters allow you to program the individual
monitor to meet your needs.
Table 6-4: Checking Gas Exposure
Action LCD
Press right button during the gas monitoring mode, the peak high
value and low value appear alternatively.
NOTE: The customer can also choose to clear the peak value by
pressing the left button. The device displays “CLEAR PEAK?”, press
the left button to confirm the operation.
Press right button to view STEL alarm set point.
Press right button to view TWA alarm set point.
NOTE: The customer can also choose to clear the peak value by
pressing the left button. The device displays “CLEAR TWA?”, press
the left button to confirm the operation.
Press right button to view the SPAN value.
LEL CO PPM
H2S PPM O2
%
%
HIGH
LEL CO PPM
H2S PPM O2
%
%
LOW
LEL CO PPM
H2S PPM O2
%
%
STEL
LEL CO PPM
H2S PPM O2
%
%
TWA
LEL CO PPM
H2S PPM O2
%
%

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2019 6-7
Press both left hand and right hand button simultaneously and immediately release the buttons to
display the menu function (Figure 6-2: Menu Display).
Figure 6-2: Menu Display
Refer to Figure 6-3: to Figure 6-9: for the configuration process of each menu function.
Figure 6-3: Monitor Configurable Menu
Table 6-5: Monitor Configuration Parameters
Item Description
Sensor Information Check the sensor values, including High alarm, Low alarm,
Bump/Cal due days.
Gas Exposure Check the Peak values, TWA and STEL values.
Date Check the current date, time and year.
Temperature Check the current temperature.
Power Save Enable and disable the power save mode.
Firmware Version Check the current firmware version.
LEL CO PPM
H2S PPM O2
%
%

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2018
6-8
Figure 6-4: Check the Sensor Information
Figure 6-5: Check Gas Exposure

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2019 6-9
Figure 6-6: Check Date and Time
Figure 6-7: Check Temperature
Figure 6-8: Enable the Power Save Mode

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2018
6-10
Figure 6-9: Check Firmware Version
6.8. Monitor LCD Alerts & Alarms
This section describes various alerts and alarms Table 6-6: Monitor Alerts and Alarms Descriptions
lists the details.
NOTE: To view the factory default alarm setpoints, see Section 5.4. Default Settings. To
change the default settings and values, refer to Portable Gas Detection (PGD) Appli-
cation User Manual.
NOTE: If other error codes appear during the operation, see Section 7.2.8. ERROR CODES.
Table 6-6: Monitor Alerts and Alarms Descriptions
LCD Description LCD Description
Low Alarm
2 fast LED flashes every 2
seconds
2 fast sounding beeps every 2
seconds
1 vibration every 2seconds
lLOW and gas reading flash
Negative Drift Alarm
1 LED flash every 2 seconds
1 sounding beep every 2 sec-
onds
1 vibration every 2 seconds
“—” and gas reading flash
High Alarm
3 fast LED flashes every 2
seconds
3 fast sounding beeps every 2
seconds
1 vibrations every 2 seconds
HIGH and gas reading flash
Sensor Missing Alarm
“NO SENSOR” display and
flashes
The device powers off with
the countdown
TWA Alarm
1 LED flash every 2 seconds
1 sounding beep every 2 sec-
onds
1 vibration every 2 seconds
TWA and gas reading flash
Low Battery Alarm
Battery icon flashes
1 beep, 1 LED and 1 vibration
every minute
The device deactivates with
the countdown (depleted)
LEL CO PPM
H 2 S PPM O 2
%
%
LOW
LEL CO PPM
H2S PPM O2
%
%
LEL CO PPM
H2S PPM O2
%
%
HIGH
LEL CO PPM
H2S PPM O2
%
%
TWA
LEL CO PPM
H2S PPM O2
%
%

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2019 6-11
6.9. Deactivating the Monitor
Perform the following steps to power off the monitor:
1. Press and hold both Operation Buttons (Left and Right) simultaneously until the countdown timer
completes.
2. Release both buttons when PWROFF displays.
STEL Alarm
1 LED flash every 2 seconds
1 sounding beep every 2 sec-
onds
1 vibration every 2 seconds
STEL and gas reading flash
Bump Test and Calibration
Due
Bump flashes
Cal flashes
Over Limit Exposure Alarm
3 fast LED flashes every 2
seconds
3 fast sounding beeps every 2
seconds
1 vibration every 2 seconds
ALARM and “+++” flash
Man Down Alarm
3 fast LED flashes every 2
seconds
3 fast sounding beeps every 2
seconds
1 vibration every 2 seconds
Man Down indicator flashes
Pump
3 fast LED flashes every 2
seconds
3 fast sounding beeps every 2
seconds
1 vibration every 2 seconds
BLOCK and Pump indicator
flash
Flash Memory is Full
The flash memory indicator
blinks
Error Code appears
Confidence Beep
Interval configurable; default
value is 60 seconds
Compliance LED
The Green Status LED is user
configurable; default value =
60 seconds.
In battery saver mode, the
compliance LED will not flash
*Each line of the battery level indicator represents approximately 25% of battery time remaining.
NOTE: When the Operation Buttons are held for three (3) seconds after the LCD goes
blank, the device attempts to power back on.
The timing parameter varies as set using the PGD Application.
Table 6-6: Monitor Alerts and Alarms Descriptions (continued)
LCD Description LCD Description
LEL CO PPM
H2S PPM O2
%
%
STEL
LEL CO PPM
H2S PPM O2
%
%
CAL
BUMP
LEL CO PPM
H2S PPM O2
%
%
LEL CO PPM
H2S PPM O2
%
%
LEL CO PPM
H2S PPM O2
%
%

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
OPERATION
8006569, Rev. C/June 2018
6-12
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3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
MAINTENANCE
8006569, Rev. C/June 2019 7-1
7. MAINTENANCE
7.1. Testing the Monitor
3M recognizes the potential of the device when operated and maintained correctly. As such, verify-
ing proper operation of the device in the form of Calibration and daily Bump Testing is essential to
ensure the monitor performs as intended in a potentially hazardous environment.
The frequency at which Calibration and Bump Testing occur is best determined based on local regu-
latory standards, company policies, and industry best practices. 3M is not responsible for setting pol-
icies or practices.
• Zero Calibration — establishes baseline readings of atmospheres that are known to be free of
toxic or combustible gases.
• Span Calibration — ensures the monitor detects target gases within specified operating parame-
ters. Adjusts the monitor’s response to match a known concentration of gas. Sensors lose sensi-
tivity through normal degradation, exposure to high gas concentrations, or sensor poisoning.
Accurate calibration can be achieved only if specific concentrations of the correct gases are
used.
• Bump Test — Verifies the Span Calibration by subjecting the device to a known concentration of
gas, and verifies that the display reads PASS.
Table 7-1: lists the recommended calibration and test items for the device.
WARNING: OPERATING A DEVICE THAT HAS EXCEEDED ITS CALIBRATION DATE
CAN CAUSE FALSE READINGS OF DETECTED GASES. READINGS
OBTAINED WHILE MONITOR IS OUT OF CALIBRATION MAY BE INVALID
AND COULD LEAD TO DEATH OR INJURY.
Table 7-1: Recommended Calibration and Test Matrix
Procedure Frequency Details
Zero Calibration • When baseline readings are incorrect or suspect
• Prior to a Span Calibration
Refer to Section 7.1.1.
ZERO CALIBRATION
Span Calibration
• CAL EXPIRED is displayed
• After installing new sensors
• When a Bump Test fails
Refer to Section 7.1.2.
SPAN CALIBRATION
Bump Test
• Daily
• When a sensor is exposed to a high concentra-
tion of gas
• When submerged in water
• When exposed to mechanical shock, such as
being dropped
Refer to Section 7.1.3.
BUMP TEST
CAUTION: End users of instruments containing the 4COSH (Dual Tox CO/H2S) sensor
must recalibrate the instrument at an increased frequency greater than 6-12
months based on their own risk assessment for the application and
environment. Where an end user risk analysis is not available, then a 3-month
calibration period is required.

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
MAINTENANCE
8006569, Rev. C/June 2018
7-2
7.1.1. ZERO CALIBRATION
1. Verify ambient air is free of toxic or combustible gases. If air is not free or cannot be verified free,
obtain a Zero Air gas cylinder (Refer to Section C.3. Confined Space Kits).
2. Power on the device.
3. Press and hold the right button, a screen appears stating release IN 3 SECONDS, continue to
hold it until the ZERO screen display.
4. Press the left button to acknowledge the zero calibration.
5. If the Zero Calibration is confirmed, a screen stating SEN 1 appears. Press left button to select
SEN 1 or press the right button to scroll down the Sensor Types.
Figure 7-1: Gas Position
6. After a successful calibration the LCD reads ZERO PASS, then press right button or wait for 60
seconds to go to span calibration. Verify the device responds to target gas and activates 1 green
LED flash every 5 seconds, 1 sounding beep every 5 seconds, and 1 vibration every 5 seconds.
WARNING: ONLY PERFORM O2 CALIBRATION IN NORMAL AIR (20.9% OXYGEN)
THAT IS FREE OF HAZARDOUS GASES.
WARNING: TO PREVENT AN ERRONEOUS ZERO CALIBRATION FROM OCCURRING,
THE DEVICE DISPLAYS IS AIR CLEAN? YOU HAVE 60 SECONDS TO
ACKNOWLEDGE THE ALERT. IF THE ALERT IS NOT ACKNOWLEDGED
WITHIN 60 SECONDS, THE DEVICE RETURNS TO THE LAST STEP. DO
NOT CONTINUE WITH ZERO CALIBRATION UNTIL AIR HAS BEEN
VERIFIED TO BE FREE OF TOXIC AND COMBUSTIBLE GASES. FAILURE
TO PROPERLY PERFORM A ZERO CALIBRATION MAY RESULT IN INJURY
OR DEATH.
NOTE: SEN 1, 2, 3, 4 represent the sensor types that are shown on the LCD (see
Figure 7-1:). SEN ALL represents Zero All Sensors. If selecting EXIT, the device goes
to the SPAN mode.
CAL
Sensor Type PPM
PPM
%
PPM
ZERO
Sensor Type
Sensor Type Sensor Type
SEN 1
SEN 3
SEN 2
SEN 4

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
MAINTENANCE
8006569, Rev. C/June 2019 7-3
7. After an unsuccessful calibration, the monitor will beep and flash and continues to display FAIL.
Verify the device activates 1 red LED flash every 2 seconds, 1 sounding beep every 2 seconds and
1 vibration every 2 seconds.
7.1.1.1. Connecting the Gas Cylinder to Monitor
Required Items (Refer to Section APPENDIX C.1. Applicable Parts List):
• Calibration gas – Verify concentration level exceeds set points of monitor and expiration date of
cylinder has not passed
• Tygon tubing – 2 feet of 3/16" ID
• Regulator – Set to provide flow at 0.5LPM
• Calibration Adapter – Shipped with monitor
Perform the following steps to install the calibration kit prior to initiating calibration.
Only use the 3M-approved gas to calibrate the monitor
.
1. Verify the concentration level of the target gas in the cylinder exceeds alarm settings of the mon-
itor (refer to Section 5.4. Default Settings if needed).
2. Attach the Regulator to the gas cylinder and verify cylinder pressure.
3. Connect the tubing to both the 0.5LPM regulator on the gas cylinder and the calibration adapter
(Figure 7-2:).
4. Refer to Section 7.1.2. SPAN CALIBRATION and Section 7.1.1. ZERO CALIBRATION for the test
procedures. Do not attach the adapter to the monitor until instructed applying gas.
Figure 7-2: Span Calibration- Calibration Adapter Attached
CAUTION: Gas must be applied at a flow rate of 0.5LPM to perform Span Calibration.
Failure to apply gas at the proper flow rate results in failed or inaccurate
calibration.
NOTE: Ensure the Calibration gas has not pasted its expiration date.

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
MAINTENANCE
8006569, Rev. C/June 2018
7-4
7.1.2. SPAN CALIBRATION
1. Refer to Section 7.1.1.1. Connecting the Gas Cylinder to Monitor to connect the gas cylinder.
2. With the device powered on, and if it is not powered on, press and hold the Right Button until the
release IN 3 SECONDS screen appears, then Zero Calibration display.
3. Press the right button to scroll down the menu and select SPAN, then press the left button to
confirm the selection.
4. If the Span Calibration is confirmed, a screen stating SEN 1 appears. Select SEN 1 or press the
right button to scroll down the Sensor Types.
WARNING: READ, UNDERSTAND AND FOLLOW THE INSTRUCTIONS, INCLUDING
LABELS AND MSDS PROVIDED BY THE MANUFACTURER OF THE
CALIBRATION GAS. FAILURE TO DO SO COULD RESULT IN INJURY OR
DEATH.
NOTE: See “Sensor K-Factors” on page 64 to calibrate an instrument to read combustible
gases other than methane.
NOTE: The device has an automatic second timer that is enabled when countdown screen
is displayed (refer to Figure 7-4: SPAN Calibration). If you are unable to apply gas
to the sensors within the specific time, the monitor will return to the normal reading
mode.
NOTE: The device can be span calibrated using either individual calibration gas cylinders
that contain one specific target gas or a gas mixture cylinder that contains a mixture
of each of the target gases. If using individual gas cylinders to span calibrate, the
span calibration procedure must be completed for each sensor.
NOTE: The device automatically looks at the sensors installed and adjust the Apply Gas
timer accordingly. Sometimes when All is selected, a few sensors (IR sensors) may
return a fail during the span calibration due to the difference in time requirements.
When this occurs, we recommend selecting the individual sensor.
NOTE: SEN 1, 2, 3, 4 represents the sensor types that are shown on the LCD (refer to
Figure 7-3:). SEN 4 represents Bump All Sensors. If selecting EXIT, the device turns
back to the BUMP screen.

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
MAINTENANCE
8006569, Rev. C/June 2019 7-5
Figure 7-3: Gas Position
5. Apply gas from the regulator and attach the Calibration Adapter to the device (see Figure 7-2:
Span Calibration- Calibration Adapter Attached).
6. Press Left button to confirm the calibration and a countdown screen will appear (see Figure 7-4:
SPAN Calibration).
Figure 7-4: SPAN Calibration
7. For single gas cylinders, wait for the Applying Gas All Span Calibration in Progress in 60 to
appear. Attach Tygon tubing to next cylinder and apply gas from the Regulator.
8. Wait for the display to read SPAN PASS then REMOVE GAS.
CAL
Sensor Type PPM
PPM
%
PPM
ZERO
Sensor Type
Sensor Type Sensor Type
SEN 1
SEN 3
SEN 2
SEN 4
LEL CO PPM
H2S PPM O2
%
%
LEL CO PPM
H2S PPM O2
%
%
LEL CO PPM
H2S PPM O2
%
%
LEL CO PPM
H2S PPM O2
%
%
CAL
LEL CO PPM
H2S PPM O2
%
%
CAL
Apply Gas

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
MAINTENANCE
8006569, Rev. C/June 2018
7-6
9. Verify the device responds to target gas and activates 1 green LED flash every 5 seconds, 1
sounding beep every 5 seconds, and 1 vibration every 5 seconds. Press the right button or wait
60 seconds to go to Exit screen.
10. After an unsuccessful calibration, the monitor will beep and flash and continues to display FAIL.
Verify the device activates 1 red LED flash every 2 seconds, 1 sounding beep every 2 seconds and
1 vibration every 2 seconds.
11. Turn off gas cylinder and remove Calibration Adapter. The device automatically returns to gas
monitoring mode.
7.1.3. BUMP TEST
Perform Bump Test as follows:
1. Refer to Section 7.1.1.1. Connecting the Gas Cylinder to Monitor to install the calibration kit.
2. Apply gas and attach Calibration Adapter to monitor (refer to Figure 7-2: Span Calibration- Cal-
ibration Adapter Attached).
3. With the device powered on, press and hold the Left Button until the release IN 3 SECONDS
screen appears, then BUMP display. Press the left button to confirm bump test.
4. A screen stating SEN 1 appears. Select SEN 1 by pressing left button or press the right button to
scroll down the Sensor Types.
Figure 7-5: Gas Position
5. Verify monitor responds to target gas and wait for the display to read PASS then REMOVE GAS.
NOTE: Span calibration is not required for the O2 sensor. Different sensor has different span
time, when span all the sensors at the same time, the LCD shows the maximum
duration.
NOTE: SEN 1, 2, 3, 4 represents the sensor types that are shown on the LCD (refer to
Figure 7-5:). SEN 4 represents Bump All Sensors. If selecting EXIT, the device turns
back to the BUMP screen.
CAL
Sensor Type PPM
PPM
%
PPM
ZERO
Sensor Type
Sensor Type Sensor Type
SEN 1
SEN 3
SEN 2
SEN 4

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
MAINTENANCE
8006569, Rev. C/June 2019 7-7
6. Verify the device responds to target gas and activates 1 green LED flash every 5 seconds, 1
sounding beep every 5 seconds, and 1 vibration every 5 seconds. Press the right button or wait
60 seconds to go to Exit screen.
7. After an unsuccessful calibration, the monitor will beep and flash and continues to display FAIL.
Verify the device activates 1 red LED flash every 2 seconds, 1 sounding beep every 2 seconds and
1 vibration every 2 seconds.
8. Turn off the gas cylinder and remove Calibration Adapter.
7.2. Maintenance
7.2.1. REPLACING SENSORS
Replace the sensors as follows:
1. Set or verify the device is turned off.
2. Unscrew and remove the four (4) M2.5 × 20 screws from the back of the device using a Philips
screwdriver (refer to Figure 7-6:).
Figure 7-6: Sensor Access
3. Lift and firmly pull the sensor cover apart. Do not pull apart at an angle or by twisting.
4. Unplug the sensor and replace with the new sensor.
WARNING: DO NOT REPLACE SENSORS WHILE IN A HAZARDOUS LOCATION.
FAILURE TO FOLLOW THIS WARNING COULD LEAD TO SERIOUS
INJURY OR DEATH.
NOTE: The torque of the screwdriver should be 3 to 4 inch-pounds to loosen or tighten the
screws.

3M™ PROTÉGÉ PLUS
PORTABLE MULTI-GAS MONITOR
MAINTENANCE
8006569, Rev. C/June 2018
7-8
5. Insert the replacement sensor using the Alignment System.
Figure 7-7: Sensor Positions
6. Reinstall the sensor cover with four (4) M2.5 × 20 screws and tighten the screws with the
sequence shown in Figure 7-8:.
NOTE: Each sensor has a small PCB tab that extends beyond its diameter, ensure the tabs
align with the small slots of sensor cavities.
1
2
3
Position 1= E-Chem
Position 2= E-Chem & Dual Gas E-Chem
Position 3= E-Chem, LEL Cat-Bead (standard) &
LEL Cat-Bead (low power)