mPower Electronics POLI MP400H User manual

POLI
Multi-Gas Detectors
MP400, MP400P,
MP400S & MP400H
User’s Guide
Rev 1.33
August, 2022

POLI User’s Guide
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Contents
1. General Information ............................................................................................................................ 5
1.1 Main Features .....................................................................................................................................................5
2. Battery................................................................................................................................................. 6
2.1 Battery Charging.................................................................................................................................................6
2.2 Battery Status .....................................................................................................................................................6
2.3 Battery Replacement ..........................................................................................................................................6
3. User Interface ...................................................................................................................................... 7
3.1 Displays and Keys................................................................................................................................................7
3.2 Alarm Overview ..................................................................................................................................................8
4. Basic Operation.................................................................................................................................... 9
4.1 Turning On ..........................................................................................................................................................9
4.2 Turning Off..........................................................................................................................................................9
4.3 Active Sensor Displays.......................................................................................................................................10
4.4 Pump Status......................................................................................................................................................10
4.5 Alarm Testing and Panic Alarm.........................................................................................................................10
4.6 Main User Menu ...............................................................................................................................................11
5. Configuration Mode........................................................................................................................... 13
5.1 Entering Configuration Mode ...........................................................................................................................13
5.2 Exiting Configuration Mode ..............................................................................................................................13
5.3 Navigating Configuration Mode to Edit Parameters ........................................................................................14
5.4 Calibration and Bump Testing...........................................................................................................................17
5.5 Measurement....................................................................................................................................................22
5.6 Alarm Settings...................................................................................................................................................23
5.7 Datalog .............................................................................................................................................................24
5.8 Monitor Set-up..................................................................................................................................................25
5.9 Wireless Set-up (mSquad and mPlatoon) .........................................................................................................27
6. Data Communication ......................................................................................................................... 28
6.1 Connecting and Configuring .............................................................................................................................28
6.2 Datalog and Event Retrieval .............................................................................................................................31
6.3 Real-Time Data .................................................................................................................................................33
7. POLI MonoDock Operation ................................................................................................................ 34
7.1 MonoDock Cal/Bump Procedures .....................................................................................................................34
7.2 MonoDock Data Download and Calibration Certificates ..................................................................................35
8. Maintenance...................................................................................................................................... 36
8.1 Replacing Filters................................................................................................................................................36
8.2 Removing or Replacing Sensor Modules ...........................................................................................................37
8.3 Cleaning or Changing PID Sensor Detector or Lamp .........................................................................................38
8.4 Replacing Pump or Battery ...............................................................................................................................38
9. Troubleshooting................................................................................................................................. 39
10.Technical Specifications.................................................................................................................... 40
Recommended Gas Span Concentrations ...............................................................................................................41
Default Alarm Limits and Span Settings..................................................................................................................42
Technical Support and mPower Contacts............................................................................................... 43

POLI User’s Guide
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Read Before Operating
This manual must be carefully read by all individuals who have or will have the responsibility of
using, maintaining or servicing this product. The product will perform as designed only if it is
used, maintained and serviced in accordance with the manufacturer’s instructions. The user
should understand how to set the correct parameters and interpret the obtained results.
CAUTION！
•REMOVE MONITOR COVER ONLY IN AREA KNOWN TO BE NON-HAZARDOUS.
•RECHARGE BATTERY ONLY IN AN AREA KNOWN TO BE NON- HAZARDOUS.
•USE ONLY mPOWER’S RECHARGEABLE LITHIUM BATTERY P/N M004-3002-000.
•USE OF NON-mPOWER COMPONENTS WILL VOID THE WARRANTY AND CAN
COMPROMISE THE SAFE PERFORMANCE OF THIS PRODUCT
•SUBSTITUTION OF COMPONENTS MAY IMPACT INTRINSIC SAFETY.
CAUTION: HIGH OFF-SCALE READINGS MAY INDICATE AN EXPLOSIVE
CONCENTRATION. ANY RAPID UP-SCALE READING FOLLOWED BY A DECLINING
OR ERRATIC READING MAY INDICATE A GAS CONCENTRATION BEYOND UPPER
SCALE LIMIT WHICH MAY BE HAZARDOUS.
ATTENTION: DES LECTURES SUPÉRIEURES A L’ÉCHELLE PEUVENT INDIQUER
DES CONCENTRATIONS EXPLOSIVES. TOUTE LECTURE RAPIDE ET POSITIVE,
SUIVIE D’UNE BAISSE SUBITE AU ERRATIQUE DE LA VALEUR, PEUT INDIQUER
UNE CONCENTRATION DE GAZ HORS GAMME DE DÉTECTION QUI PEUT ÊTRE
DANGEREUSE.
WARNINGS !
ONLY THE COMBUSTIBLE GAS DETECTION PORTION OF THIS INSTRUMENT HAS
BEEN ASSESSED FOR PERFORMANCE.
UNIQUMENT, LA PORTION POUR DÉTECTOR LES GAZ COMBUSTIBLES DE CET
INSTRUMENT A ÉTÉ ÉVALUÉE.
CAUTION: BEFORE EACH DAY’S USE, THE SENSITIVITY OF THE COMBUSTIBLE
GAS SENSOR MUST BE TESTED ON A KNOWN CONCENTRATION OF METHANE
GAS EQUIVALENT TO 20 TO 50% OF FULLSCALE CONCENTRATION. ACCURACY
MUST BE WITHIN 0 AND +20% OF ACTUAL. ACCURACY MAY BE CORRECTED BY
A CALIBRATION PROCEDURE.
ATTENTION: AVANT CHAQUE UTILISATION JOURNALIERE VERIFIER LA
SENSIBILITE AVEC UNE CONCENTRATION CONNUE DE METHANE EQUIVALENTE
A 20-50% DE LA PLEINE ECHELLE. LA PRECISION DOIT ETRE COMPRISE ENTRE
0-20% DE LA VALEUR VRAIE ET PEUT ETRE CORRIGEE PARUNE PROCEDURE
D’ETALONNAGE.

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WARNINGS !
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
CAUTION: Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user's authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
Special Conditions for Safe Use
•The POLI multi-gas detector must be calibrated if it does not pass a bump test, when a new
sensor has been installed, or at least once every 180 days, depending on use and sensor
exposure to poisons and contaminants
•No precautions against electrostatic discharge are necessary for portable equipment that has
an enclosure made of plastic, metal or a combination of the two, except where a significant
static-generating mechanism has been identified. Activities such as placing the item on a belt,
operating a keypad or cleaning with a damp cloth, do not present a significant electrostatic
risk. However, where a static-generating mechanism is identified, such as repeated brushing
against clothing, then suitable precautions shall be taken, e.g., the use of anti-static footwear.
Note: Users are recommended to refer to ISA -RP12.13, Part II-1987 for general information on
installation, operation, and maintenance of combustible gas detection instruments.
Proper Product Disposal at the End of Life
The Waste Electrical and Electronic Equipment (WEEE) directive (2002/96/EC) is intended
to promote recycling of electrical and electronic equipment and their components at end of
life. This symbol (crossed-out wheeled bin) indicates separate collection of waste electrical
and electronic equipment in the EU countries. This product may contain one or more
Nickel-metal hydride (NiMH), Lithium-ion, or Alkaline batteries. Specific battery
information is given in this user guide. Batteries must be recycled or disposed of properly.
At the end of its life, this product must undergo separate collection and recycling from
general or household waste. Please use the return and collection system available in your
country for the disposal of this product.

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1. General Information
The POLI multi-gas detectors (MP400 & MP400P) offer 4- or 5-gas monitoring of oxygen (O2),
combustible (LEL) gases, toxic gases, carbon dioxide (CO2), and volatile organic compounds
(VOCs). The MP400 is a diffusion sampling model with standard O2, LEL, carbon monoxide
(CO) and hydrogen sulfide (H2S) configuration. A firefighter version uses O2, LEL, CO and
hydrogen cyanide (HCN) sensors, and a 5-gas version including sulfur dioxide (SO2) is also
available. The MP400P is a standard model with pump and allows a full selection of sensors, e.g.
over 30 different electrochemical (EC) sensors, pellistor for LEL, non-dispersive infrared
(NDIR) for hydrocarbons in both %LEL and %Vol ranges and photo-ionization detector (PID)
for VOCs.
The MP400S is an advanced model with pump and a built-in wireless module that sends critical
data including panic, man-down, gas concentration, and battery alarms to supervisors and control
centers on site or at remote locations for faster responses and maximized safety. The MP400S is
used in concert with a head monitor MP400H for teams of up to 8 monitors in an mSquad are up
to 64 monitors in an mPlatoon system. This User Guide covers the basic operation of the
individual MP400S and MP400H instruments; for information on setting up and operating
systems of multiple instruments, see the mSquad User’s Guide.
1.1 Main Features
•4 models of diffusion, pumped and wireless optimized for basic confined space entry (CSE)
compliance, professional, and advanced applications
•Large, graphical display and icon-driven user interface through intuitive, simple, two-button
operation. Auto flip-screen when held up-side down.
•Over 30 interchangeable sensor configurations, including PID for VOC, NDIR and catalytic
sensor for combustibles, and NDIR for CO2
•Intelligent sensors store calibration data ready for quick installation in the field
•Easy access to pump, sensors and filter
•Long battery run time of 16 hours in diffusion mode and 12 hours with pump running
•6 months continuous datalog storage with 4 sensors
•Man-down, panic, gas concentration and battery alarm notification via ISM wireless at no
operating cost
•IP-65/67 water and dust resistant rating
•Durable double-shot outer case
NOTE
Due to continuous improvement of our products, this manual may not reflect all of the latest
updates in software, firmware and hardware for the instrument received.

POLI User’s Guide
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2. Battery
Fully charge the POLI battery upon receiving the instrument and before each day’s use. The Li-
ion battery is charged using a Micro-USB cable.
NOTE: Any locally-obtained USB A to Micro B USB cable works for charging, but does not
work for communication with mPower Suite configuration and data transfer software. The
mPower USB cable P/N M-011-3003-000 is required for a PC to recognize the instrument and
communicate with mPower Suite.
WARNING
To reduce the risk of ignition of hazardous atmospheres, recharge, remove or replace the battery
only in an area known to be non-hazardous!
2.1 Battery Charging
Plug the mini end of the Micro-USB cable into the charging port of POLI, and
the other end to a USB power adaptor or the USB port of a computer. The
screen will display a battery icon from empty to full and one alarm LED will
remain yellow. When the battery is fully charged, the icon displays full grid
status (see Section 3.1), and the alarm LED turns green.
2.2 Battery Status
The battery icon on the display shows how much charge is in the battery, and
alerts of any charging problem.
blink
Full charge
2/3 charge
1/3 charge
Battery Low
Battery Alarm
When the battery’s charge falls below a preset voltage, the instrument warns by beeping once
and flashing once every minute. The instrument automatically powers down within 10 minutes,
after which the battery must be recharged. When a low-battery alarm occurs, we recommended
promptly switching instruments to a fully charged POLI, and/or charging the battery in a non-
hazardous location.
2.3 Battery Replacement
The POLI Lithium-ion battery pack is free of maintenance. In case of a battery failure or end of
operating life, please contact the mPower Service Department or an authorized service center for
a battery replacement.

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3. User Interface
The POLI user interface consists of two keys, four sensor sockets, one large Liquid Crystal
Display (LCD), eight alarm LEDs, one buzzer, and two vibration alarms.
3.1 Displays and Keys
The LCD provides visual information that includes real-time gas readings, sensor types, datalog /
battery / pump / wireless status, and others.
(pump models)
(Gas inlet/outlet
diffusion models)
Man Down alarm enabled
Datalog on reminder
Battery status
Unit of measure
Pump status
Wireless status
Sensor type
Concentration
reading
Functions of left and right keys
Valid on Cal & Bump test

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3.1.1 Status Indicator Icons
Along the top of most screens are status icons that indicate whether a function is operating and/or
its strength or level.
Icon
Function
Wireless signal strength at 0-5 level
Pump status (pump versions only)
Datalogging enabled (cannot turn off)
Battery voltage status
Man-down alarm enabled
All sensors have been bump tested and calibrated; no sensor is overdue for a bump
test or calibration according to the intervals configured on the instrument.
3.1.2 Keys and Interface
The POLI has two keys:
These two keys are marked as [+/OK] to Confirm Operations or Increase Number and [ /↓] to
Power On-Off / Move Cursor. They also act as ‘soft keys’ mapped to two text or symbol boxes
at the LCD bottom that change numbers and make selections under various menus.
In addition to the functions described above, the Left [+/OK] key can be used to manually
activate the LCD backligh when it is off, and to manually test the LED, audio and vibration
alarms from the main display.
3.2 Alarm Overview
The POLI provides an unmistakable five-way alarm notification that combines local alarms on
the device with real-time remote wireless alarm notification to enhance worker safety up to the
next level. Device alarms include audible buzzer, visible bright LED lights, vibration, and alarm
notification on the display. These can be programmed or selectively turned on or off.
During each measurement period, the gas concentration is compared with the programmed alarm
limits for Low, High, TWA and STEL alarms. If the concentration exceeds (or goes below, in the
case of oxygen) any of the preset limits, the alarms are activated immediately to warn both the
POLI user and a remote safety officer (if wireless is enabled) of the alarm condition. In addition,
the POLI alarms when the battery voltage is low, pump is blocked, and in other fault conditions.
A major new feature is the Man-Down detection, which can be enabled to activate local and
remote alarms when the user has collapsed or stopped moving. This feature can also be initiated
manually by initiating a Panic Alarm if the worker finds themself in distress.
Left [+/OK] Key
Confirm Operation/Increase Number
Right [ /↓] Key
Power On-Off/Move Cursor

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Alarm Types and Priority
Alarm Type
Red LED
Buzzer
Vibrator
Panic Alarm
1 Flash/sec
Multi-Tone Long Beep
1 Vibration/sec
Man-Down Alarm
1 Flash/sec
Multi-Tone Long Beep
1 Vibration/sec
Over-range Alarm
3 Flashes/sec
3 Beeps/sec
1 Vibration/sec
High Gas Alarm
3 Flashes/sec
3 Beeps/sec
1 Vibration/sec
Calibration Fail
3 Flashes/sec
3 Beeps/sec
1 Vibration/sec
Bump Test Fail
3 Flashes/sec
3 Beeps/sec
1 Vibration/sec
Low Gas Alarm
2 Flashes/sec
2 Beeps/sec
1 Vibration/sec
STEL Alarm
1 Flash/sec
1 Beep/sec
1 Vibration/sec
TWA Alarm
1 Flash/sec
1 Beep/sec
1 Vibration/sec
Negative Drift
1 Flash/sec
1 Beep/sec
1 Vibration/sec
Calibration Overdue
1 Flash/sec
1 Beep/sec
1 Vibration/sec
Bump Test Overdue
1 Flash/sec
1 Beep/sec
1 Vibration/sec
Battery Low
1 Flash/min
1 Beep/min
1 Vibration/min
Sensor Error
1 Flash/sec
1 Beep/sec
Battery Dead
1 Flash/sec
1 Beep/sec
Wireless Comm Lost
1 Flash/sec
4. Basic Operation
4.1Turning On
Press and hold the [ /↓] Key for 3 seconds, until the buzzer beeps and the red LED turns on. As
the unit is powers on, it will display information such as mPower logo and Company name,
Product type, Model No. and Serial No., Firmware version, Build date and time, Battery type and
Voltage, Datalog interval and Alarm Limits for each Sensor type.
The POLI’s main reading screen then appears. It usually takes 1 to 2 minutes for sensors to show
meaningful readings. For some sensors not fully warmed up by the time, the main screen shows
‘- -’instead of numerical values until the sensor is stabilized, typically in a few more minutes. It
then displays instantaneous readings similar to the screens shown in Section 2.2 (depending on
the sensors installed) and is ready for use.
NOTE: If the battery has too low power, a message ‘Battery Fully Discharged’ is briefly shown
and the POLI shuts off automatically. The battery should then be recharged before restarting.
If a major error that prevents the POLI from functioning occurs during startup, the message
‘Contact Service’ is displayed. The instrument should be shut off and sent for service.
4.2 Turning Off
In normal reading mode, press and hold the [ /↓] key. The unit will show a 5-second count
down, with red LED flashes and buzzer beeps once per second. After the last long flash and
beep, the unit displays ‘Power Off’, and turns off.
Caution: The alarm is loud. During startup, one can mute most of the sound by temporarily
holding a finger over the buzzer opening hole. Do not put tape over the buzzer opening as it
permanently mutes and causes a serious safety concern.
Priority (Highest to Lowest)

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4.3 Active Sensor Displays
The POLI is a flexible platform with four sensor sockets that allows use of anywhere between
one and five sensors, the latter with a dual toxic gas sensor. When one or more sensors is either
not installed or turned off, the display only shows the installed, active sensors:
4.4 Pump Status
During normal operation, the pump icon alternately shows inflow and outflow. If
there is a pump failure or obstruction, the alarm sounds and the pump stall icon
blinks on and off. If this occurs, clear the obstruction and press the Left [+/OK]
key to restart the pump.
IMPORTANT!
Obstructions can cause premature wear on the pump and false readings. If the pump does not
restart after pressing [+/OK], consult the Troubleshooting section of this guide or contact an
mPower service center for technical support.
NOTE: Pump status is not indicated on diffusion versions of the POLI.
4.5 Alarm Testing and Panic Alarm
Under normal operation mode and non-alarm conditions, the audible (buzzer) alarm, vibration
alarm, LED, and backlight can be tested at any time by pressing [+/OK] once. Continuing to
hold down the [+/OK] key for 3 seconds initiates a Panic Alarm that warns nearby workers of the
operator’s distress. This alarm can be cleared by holding down both keys simultaneously.

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WARNING!
If any of the alarms do not respond to this test, check the Alarm Settings in Configuration Mode
to see if the alarms have been turned off. If any of the alarms is enabled but not functional, do
not use the instrument. Contact an mPower service center for technical support.
4.6 Main User Menu
There are two main menus accessible without a password directly from the main concentration
display screen. Repeatedly pressing the Right [ /↓] key cycles through various parameters such
as the latest Peak and TWA readings, date, battery status, and gas correction factors. The Left
[+/OK] key cycles through the Bump and Calibration status of the monitor.
4.6.1 Right-Cycle Main Menu
The Right-cycle information sequence is shown below. The Peak, Minimum, STEL and TWA
for each sensor since turn-on are displayed, with the option to clear and re-start Peak or
Minimum. The date, time, temperature and battery information are self-explanatory. If the
POLI is fitted with a PID or Pellistor LEL sensor, the corresponding Calibration Gas and
Measurement Gas (and its Correction Factor) are displayed (can be changed in mPower Suite).
REAL-TIME READINGS
[ /↓]
PEAK Clear Peak?
[ /↓]
MINIMUM Clear Min?
[ /↓]
STEL
[ /↓]
TWA
[ /↓]
DATE, TIME, TEMPERATURE
[ /↓]
BATTERY TYPE, VOLTAGE, RUN TIME
[ /↓]
PID CAL GAS, MEASUREMENT GAS, CORRECTION FACTOR (If installed)
[ /↓]
LEL CAL GAS, MEASUREMENT GAS, CORRECTION FACTOR (If installed)
[ /↓]
START COMM? PC Communication Mode (stop pump and readings)
[ /↓]
REAL-TIME READINGS
The last display before returning to Real time readings is “Start Comm?”. Pressing the check box
stops the pump and readings, and waits for communication with a PC using mPower Suite to
transfer data or update the instrument configuration (see Section 6).

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4.6.2 Left-Cycle Main Menu
The Left-cycle information sequence is shown below.
REAL-TIME READINGS
[+/OK] ↓
Test LED/Buzzer/Vibration Alarms
↓
3 sec ↓
High Alarm
CO(ppm) H2S(ppm)
200 15.0
O2(%) LEL(%LEL)
23.5 20
Skip
Exit
Last Cal Date
CO H2S
01/05/20 01/05/20
O2 LEL
01/05/20
01/08/20
Skip
Exit
Low Alarm
CO(ppm) H2S(ppm)
35 10.0
O2(%) LEL(%LEL)
19.5 10
Skip
Exit
Cal Due Days Left
CO H2S
66
O2 LEL
6 9
Skip
Exit
Cal Interval Off (Zero)
Cal Interval On (Non-zero)
[+/OK]
[[ /↓]]
Last Bump Date
CO H2S
01/05/20 01/05/20
O2 LEL
01/05/20
01/08/20
Skip
Exit
Bump Due Days Left
CO H2S
66
O2 LEL
6 9
Skip
Exit
Bump Interval Off (Zero)
Bump Interval On (Non-zero)
3 sec
No Action
3 sec
No Action
No Action
3 sec No Action
[+/OK]
[+/OK]
[[ /↓]]
[[ /↓]]
[[ /↓]]

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Pressing the Left [+/OK] key once first tests all the alarms and then automatically cycles through
displaying the High and Low Alarm Limits and Cal and Bump information for all the sensors
installed. If the Cal or Bump intervals are turned off (set to zero), the last Cal or Bump Dates are
shown. If the Cal or Bump intrevals are given set values, then the days remaining until due are
shown. Any screen can be skipped without waiting the 3 seconds by pressing the Left [+/OK]
key or the whole process exited using the Right [[ /↓]] key.
5. Configuration Mode
The Configuration Mode (Config Mode) is used to adjust the POLI’s operation settings and
calibrate sensors. Remember that the two text/symbol boxes at the bottom of the display are
mapped to the Left [+/OK] and Right [ /↓] keys and will vary with the menu.
5.1 Entering Configuration Mode
Press and hold both the [+/OK] and [ /↓] keys simultaneously for 3 seconds until the password
screen appears. The default password is ‘0000’ and can only be changed using mPower Suite
software. The password is needed only the first time Config Mode is entered after power is
turned on.
•Increase the number from 0 through 9 by pressing [+/OK] (mapped to ).
•Step from digit to digit using [ /↓] (mapped to ).
•After entering all four digits, Press [ /↓] again and changes to ‘ ’.
•Press [+/OK] to register the password and enter Config Mode.
If the password is not correct, the message ‘Incorrect!’ is displayed and the unit returns to the
reading mode automatically. If a wrong digit is entered, use the [ /↓] key to move the cursor
among four digits and press [+/OK] to change the input.
5.2 Exiting Configuration Mode
To exit, scroll through the main Confg Mode Menu using the [ /↓] key until the
door symbol is highlighted and press [+/OK]. Or simply wait, and the unit will return to
normal operating mode automatically if no buttons are pressed for one minute.

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5.3 Navigating Configuration Mode to Edit Parameters
After entering Config Mode, the calibration menu is displayed first. Press [ /↓] (→) to step
through the menus and [+/OK] (Enter) to enter a menu to edit the parameters in its submenu.
5.3.1 Menus and Sub-menus
Configuration Mode menus and sub-menus are organized as shown here:
Calibration
Measurement
Alarm
Datalog
Monitor Setup
Wireless**
Exit
Fresh Air Calib
Enable/Disable
High Limit
Clear All
LCD Contrast
Register Devices
Multi Span
PID Meas. Gasǂ
Low Limit
Interval
Pump Speed*
Assign Worker
Single Zero (for
O2/CO2only)
Set User CF
(PID only)ǂ
STEL Limit
Sensor
Select
Pump Stall*
Register (for 400H
only)
Single Span
Gas Unit
TWA Limit
Exit
Temperature Unit
Host Module ID
Bump Test
Exit
Alarm Device
Language
Channel
Set Span Value
Heart Beat
Light
Back Light Mode
Exit
Set Span2 Val¥
M-D†On/Off
LCD Auto Flip
3-Point Cal
Enable¥
Man-Down
Warn Time
Policy Check
Exit
Man-Down
Threshhold
Real-Time Clock
Set-up
Man-Down
Tmotionless
Exit
Exit
* Pump versions only. ** Wireless versions only. ǂPID versions only. ¥PID & Dual-range LEL versions only †M-D = Man-Down

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5.3.2 Navigating Lists
There are two types of menus in Configuration Mode: 1) those that ask for selection from a list
and 2) those that ask for a numerical value to be entered. Simple lists and those with radio
buttons are used when only one option can be selected. Check [X] boxes are used when multiple
options can be selected at the same time.
5.3.2.1 Simple Lists
When a simple list is shown, use the [ /↓] down-arrow key to highlight the desired item and
then press [+/OK] (Enter) to enter the sub-menu. To exit the simple list, scroll down until Exit is
highlighted and the Enter key changes to ‘ ’, then press [+/OK].
5.3.2.2 Check [X] Box Lists
When a Check [X] Box list appears as shown above, follow the numbered sequence in blue
above. If no change is desired, simply press [+/OK] ‘ ’ to exit. To make changes, 1press [ /↓]
and the first item is highlighted. 2Use [+/OK] to toggle the item checked or unchecked, and 3
use the arrow [ /↓] to move to the next item or end of the list where (Toggle) changes to ‘ ’.
Finally, 5 press [+/OK] ‘ ’ to exit and 6 press [+/OK] ‘ ’ again to save. If Save is not
acknowledged, no changes will be made and the unit will revert back to the previous settings.
Main Config Menu
Simple List
Main Config Menu
Simple List
Check-Box List
Change
Change
Toggle
CO
2
1
3
4
5
Change
Save?
Exit
Exit

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5.3.2.3 Radio Button Lists
Radio buttons are used when only a single item in the list can be selected, and there are no
further sub-menus. When a radio button list appears, follow the numbered sequence in blue as
shown below. If no change is desired, simply press [+/OK] ‘ ’ to exit. To make changes, 1
press [ /↓] (Change) and the first item is highlighted. 2Use the down arrow [ /↓] to move to
the desired item, 3use [+/OK] (Select) to choose the highlighted item, and 4use the down arrow
[/↓] to move to the next item or end of the list where (Select) changes to ‘ ’. Finally, 5 press
[+/OK] ‘ ’ to exit.
5.3.3 Entering Numerical Values
To enter numerical values in a list, proceed as shown below. If no change is desired, simply press
[+/OK] (Done) to exit. To make changes, press [ /↓] (Change) and the first item is highlighted.
Use the arrow [ /↓] to move to the desired item(s), use [+/OK] (Inc/+) to increase the numerical
value. Then use the arrow [ /↓] to move to the next item or end of the list where (Inc/+) changes
to (Done). Finally, press [+/OK] (Done) to exit and press [+/OK] (Done) again to save. If Save is
not acknowledged, no changes will be made and the unit will revert back to the previous settings
5.3.3.1 Decreasing Numerical Values
To switch the Left soft key function from increasing to decreasing, hold both keys down
simultaneously for about 2 seconds until changes to . After exiting the menu, the
Left key will automatically revert to increasing numbers again.
M-D On/Off
○ Off
◉ On
○ Vertical Off
○ Horizontal Off
M-D On/Off
○ Off
◉ On
○
Vertical Off
○ Horizontal Off
Select
M-D On/Off
○ Off
◉ On
○ Vertical Off
○ Horizontal Off
Change
4
2
Change
1
3
5
Radio Button List
Low Limit
CO(ppm) H2S(ppm)
35 10.0
O2(%) LEL(%LEL)
19.5 10
Low Limit
CO(ppm) H2S(ppm)
35 10.0
O2(%) LEL(%LEL)
19.5 10
Done
Inc/+
Low Limit
CO(ppm) H2S(ppm)
50 10.0
O2(%) LEL(%LEL)
19.5 10
Low Limit
CO(ppm) H2S(ppm)
50 10.0
O2(%) LEL(%LEL)
19.5 10
Inc/+
Done
Change
Change

POLI User’s Guide
17
5.4 Calibration and Bump Testing
Use this menu to perform zero or span calibration for one or more sensors, bump test the sensors
and alarms for function, and change the span gas concentration.
The POLI should be calibrated on the first day of use and at regular intervals not to exceed 180
days, depending on use and exposure to particulates, contaminants and sensor poisons. A daily
bump test should be performed to ensure a functional response of all sensors and alarms.
•BUMP TEST is defined as a brief exposure to sensor gases, typically 30 seconds, just long
enough to indicate that the sensors are responsive and the alarms are functional, without
concern for a quantitative measurement.
•CALIBRATION is defined as exposing the sensor(s) to a known concentration standard gas
for the full calibration time (typically 60 to 90 seconds) and setting the reading of the
sensor(s) equal to the concentration of the calibration gas.
Calibration intervals and bump test procedures may vary due to sensor type, ambient conditions,
local regulations and/or the user’s company policies.* Automatic reminders for calibration and
bump tests can be set up using the mPower Suite software (see Section 6.1). When a calibration
or bump is due, the sensor name alternates with a highlighted 'CAL' or ‘BUMP’ as shown below:
Calibration is also required if:
•The sensor module has been replaced with one whose calibration is overdue.
•The user has changed the calibration gas type without recalibrating the instrument.
•The sensor has failed in a previous calibration.
For more on calibration frequency see Tech/App Note 3 “How Often to Calibrate Gas Detectors”.*
* The calibration frequency must be defined by the user’s company policy because each application is different and
may cause a sensor’s sensitivity loss for various reasons out of mPower’s control, such as liquids, dirt or corrosion
preventing gas from reaching a sensor, or exposure to chemicals that poison a sensor’s function. Exotic gas sensors
tend to need more frequent calibration than common O2, LEL, CO and H2S sensors. In general we recommend a
bump test before each day’s use to test sensor response and alarm function. A calibration check can be performed
by applying a known concentration gas to see if the sensors still respond within typical limits. Cal check intervals
can be increased as the user gains experience in the application. If a bump or cal check fails, the instrument should
be given a full calibration. We recommend no more than one month between full calibrations, but this can be
extended for up to 6 months if company policy allows.

POLI User’s Guide
18
5.4.1 Calibration Set-Up
5.4.1.1 Span Gas Selection
The gas concentration chosen for span calibration and bump testing should be near the middle to
upper range of the concentrations expected to be measured. If the possible gas concentrations
are unknown, choose a gas concentration near the upper end of the sensor’s range, or near the
highest exposure limit (e.g., TWA, STEL or Ceiling) of concern. Standard 4-gas mixtures allow
calibration of 4 sensors at the same time. mPower has selected a mixture of 60 ppm CO/15 ppm
H2S/2.5% CH4/18% O2, (balance N2) as the recommended calibration gas for such monitors.
Span gas recommendations for other gases are listed at the end of this manual and in TA Note 4.
Some sensors can be calibrated with surrogate gases when the gas they are designed to measure
is highly reactive, expensive or otherwise difficult to obtain.
Note that some common sensor combinations use calibration gases that are incompatible and
therefore must be applied separately, for example chlorine (Cl2) & ammonia (NH3) and chlorine
dioxide (ClO2) and hydrogen sulfide (H2S). For such cases it is important to allow a few minutes
between calibrations to allow one interfering gas to clear out before the other is applied.
5.4.1.2 Calibration Compounds for PID and LEL Sensors
Because PIDs and LEL sensors are broadband detectors, they can be calibrated with many
possible gases. The type of calibration gas is selected from a list of several hundred compounds
in mPower Suite (Section 6.1), typically isobutylene for PID and methane for LEL. The
measurement gas is also selected in mPower Suite. Correction factors are calculated and
automatically applied to make the display read in equivalents of the Measurement Gas.
5.4.1.3 Gas Connections and Regulators
Calibration gas is most easily supplied from a pressurized cylinder controlled by a regulator.
•Fixed-flow Regulators are pre-set to deliver a consistent flow rate regardless of the gas
pressure remaining in the cylinder. We recommend 0.3 LPM regulators for diffusion POLI
versions and 0.5 LPM regulators for pumped POLI versions.
•Demand-flow Regulators are more expensive but save gas by allowing only the amount of
gas to flow that the POLI pump withdraws. These regulators cannot be used with diffusion
instruments since they have no pump.
•Gas Generators provide their own flow and are required for a few gases like ozone (O3)
and chlorine dioxide (ClO2) that are too unstable to be stored in a cylinder.
•Trigger Regulators supply a puff of gas at an undefined flow and are useful for quickly
doing a functional bump test without entering Config Mode to record the test.
Pumped Instruments. We recommend calibrating the POLI with the pump on the High Flow
setting, where it typically draws less than 450 cc/min (0.45 LPM) with a 0.45 µm filter in place.
In this case the instrument can be connected directly to the gas cylinder fitted with either a
demand-flow regulator or a 0.5 LPM fixed flow regulator. If the fixed-flow regulator supplies
more than 0.5 LPM, a T-connector, as illustrated below, must be used in the gas supply line to
allow excess gas to escape without being forced through the POLI pump and sensor chambers.
Even when using a T-connector, we recommend no more than 1.0 LPM total flow.
Note: Make sure the pressure in the gas cylinder is >100 psi when using a T-connector.

POLI User’s Guide
19
Diffusion Instruments. Diffusion instruments have a black cap covering the Luer connector to
protect the unit from dirt and moisture. This cap must be removed to attach the Luer fitting and
connected tubing leading to the gas supply. (Internal channels distribute the gas to each sensor,
even though during measurements the gas enters and leaves through the four filters on the face of
the POLI.) The gas flow should be low, between 0.2 and 0.3 LPM to avoid pressure build-up in
the sensor channels. Do not use a T-connector or demand-flow regulator with diffusion sampling.
5.4.1.4 PTFE Connecting Tubing for Reactive Gases
For reactive gases including ozone, chlorine, chlorine dioxide, hydrochloric acid, hydrofluoric
acid, and absorbable gases such as most VOCs, it is critical to use inert connecting tubing such
as PTFE (Teflon) and make connections as short as practical. More flexible variants such as
PTFE-lined Norprene or PTFE-lined Tygon are suitable alternatives. For most other gases,
including standard 4-gas mixes with carbon monoxide, hydrogen sulfide and methane, Tygon
tubing is adequate and convenient because of its flexibility.
5.4.1.5 Other Attachments
It is always most accurate to calibrate the POLI with all attachments in place in the same manner
as in the field measurements. For example, normally a filter should be used on the POLI inlet for
both measurements and calibration. However, if a filter is not used during measurement (as
preferred in a few cases of highly reactive gases) then no filter should be used during calibration.
Similarly, if extension tubing is being used during sampling, a more accurate calibration is
obtained if the tubing is also attached during calibration. This method accounts for any small
changes made to the gas concentration by the attachment(s).
Demand-flow or 0.5 LPM
fixed flow regulator
Fixed-flow regulator with >0.5 to
1.0 LPM flow using T-connector
Connect
tubing using
Luer fitting
Remove cap
Pumped Instruments
Diffusion Instrument
Connect to gas with
fixed-flow regulator of
0.2-0.3 LPM flow
Luer fitting

POLI User’s Guide
20
5.4.2 Fresh Air (Zero) Calibration
Air calibration should precede span calibration and be done in clean air with 20.9% oxygen (and
400 ppm CO2, if this sensor is installed). This procedure determines the zero points of most
sensors and the span calibration for the oxygen sensor. No gas connections are required if the
ambient air contains no detectable contaminants. Fresh Air calibration sets the oxygen sensor
reading to 20.9% and the carbon dioxide sensor reading to 400 ppm. To calibrate these sensors to
0 readings use the Single Zero menu below.
In Configuration Mode, enter the Calibration menu and select ‘Fresh Air Calib’to show the
selected sensor list. De-select any sensor(s) not wanted to be zeroed ([ /↓] (Change)). Start the
zero calibration by pressing [+/OK] ‘ ’ to initiate the 30-second zero calibration count-down.
The zeroing process can be aborted at any time during this count-down by pressing [ /↓]. When
the zero calibration is complete, the ‘Pass’ or ‘Fail’ result is shown for each sensor.
5.4.3 Single Zero Calibration (O2and CO2Sensors)
Single Zero calibration is used to set the baseline for the oxygen and carbon dioxide sensors.
This calibration is needed mostly for applications in rather low oxygen concentrations below
about 5 Vol%, because the oxygen baseline is usually quite stable. It is not normally needed for
breathing air applications near 20.9 Vol% oxygen.
To perform an oxygen or carbon dioxide zero calibration, enter the ‘Single Zero’ menu, select
the O2or CO2sensor, apply zero gas (e.g., nitrogen ) to the POLI inlet, and proceed as described
for Fresh Air Calibration above. The nitrogen count-down time is 60 seconds for O2and 90
seconds for CO2.Other inert gases such as argon or helium could also be used as long as they
are free of the target gas.
5.4.4 Span Calibration
In Configuration Mode, enter the Calibration menu and select ‘Span Calib’. Depending on the
configuration of the POLI, multiple sensors may be calibrated simultaneously. Select the desired
sensors and press [+/OK] ‘ ’. Verify that the span gas concentrations match those of the gas
cylinder. If not, abort and go to the Span Value menu to adjust. If OK, turn on the gas flow,
connect the gas to the POLI, and press Start to initiate the 60-second count-down. The When
complete, the display shows the sensor readings alternately with a ‘Pass’ or ‘Fail’ message. The
span calibration can be aborted at any time during the count-down by pressing [ /↓] (Abort).
NOTE: If the sensor calibration fails, try again. If calibration fails again, turn off the power and
replace the sensor. WARNING! Do not replace sensors in hazardous locations!
Fresh Air Calib
CO
H2S
----
----
O2
LEL
---- ----
Abort
29
Change
s