mPower Electronics UNI 321 User manual

UNI 321
Maintenance-Free
Single Gas Detectors
User’s Guide
Ver 1.3
September 2020

UNI 321 User’s Guide
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Contents
Read Before Operating ..............................................................................................................2
General Information...................................................................................................................3
User Interface.....................................................................................................................3
Display...............................................................................................................................3
Normal Operation ..............................................................................................................3
Normal Mode Operation............................................................................................................4
Turning the Unit On...........................................................................................................4
Warm-up Sequence............................................................................................................4
Remaining Time Display ...................................................................................................4
Alarms................................................................................................................................4
Configuration Mode...................................................................................................................6
Entering and Exiting Configuration Mode ........................................................................6
Zero (fresh air) Calibration................................................................................................6
Set High and Low Alarm Levels........................................................................................6
Maintenance...............................................................................................................................7
Replacing the Sensor Filter................................................................................................7
Specifications.............................................................................................................................8
Sensor Configurations........................................................................................................9
Alarm Signal Summary....................................................................................................10
Troubleshooting .......................................................................................................................11

UNI 321 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.
WARNING
•Never operate the monitor when the cover is removed.
•Remove the monitor cover and battery only in an area known to be non-hazardous.
•Use only mPower’s lithium battery part number M500-0001-000 [1.17.02.0002] (3.6V,
2700mAH, AA size) or part No. ER14505 cell manufactured by EVE Energy Co., LTD.
•This instrument has not been tested in an explosive gas/air atmosphere having an oxygen
concentration greater than 21%.
•Substitution of components will impair suitability for intrinsic safety.
•Substitution of components will void warranty.
•It is recommended to bump test with a known concentration gas to confirm the
instrument is functioning properly before use.
•Before use, ensure that the colorless ESD layer on the display is not damaged or peeling.
(The loose blue or colorless protective film used for shipment may be removed.)
AVERTISSEMENT
•N'utilisez jamais le moniteur lorsque le couvercle est enlevé.
•Retirer le couvercle du moniteur et la batterie uniquement dans une zone connue comme
non dangereuse.
•Utilisez uniquement la batterie au lithium de mPower, pièce No. M500-0001-000
[1.17.02.0002] (3.6V, 2700mAH, taille AA) ou celle de EVE Énergie Cie., Lté, pièce No.
ER14505.
•Cet instrument n'a pas été testé dans une atmosphère explosive gaz / air ayant une
concentration en oxygène supérieure à 21%.
•La substitution de composants compromettra l'aptitude à la sécurité intrinsèque.
•La substitution des composants annulera la garantie.
•Il est recommandé de tester avec un gaz de concentration connu pour confirmer que l'ins
trument fonctionne correctement avant de l'utiliser.
•Avant l'utilisation, assurez-vous que la couche ESD incolore de l'écran n'est pas
endommagée ou épluchée. (Le film protecteur bleu peut être enlevé.)
Proper Product Disposal at End of Life
The Waste Electrical and Electronic Equipment (WEEE) irective (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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General Information
The UNI 321 is a disposable or maintenance-free version of the UNI single gas detector. It
detects H2S, CO or O2in a selection of models for an operation life of either 12 months
(MP101), 24 months (MP102) or 36 months (MP103). The detector has a large LCD
providing maximum readability in the field. Six bright red LEDs allow for quick alarm
notification. Constructed of strong and durable material, the UNI 321 is designed to be
comfortable, yet drop-resistant.
User Interface
Display
1. Gas name, includes: CO, H2S and O2
2. Remaining time unit: Months, Days, Hours
3. Question mark: Daily alarm test needed; Bump test
due; Perform menu function
4. OK: Accept menu entry; Unit status indicator
5. Gas concentration unit (for alarm setting display)
6. Remaining operating time (Months/Days/Hours)
7. Low battery warning
Normal Operation
Normal operation is limited to the following functions
•Displaying the remaining operating time (the unit cannot be turned off)
•Displaying (and logging) the Alarm Level if this concentration of gas is exceeded
•Entering Configuration Mode to perform a fresh air zero calibration
•Replacing the sensor filter if used in especially highly dusty or moist environments
Full bump test or calibration, and setting other functions can only be performed using a UNI
Docking Box MP100T or the CaliCase MP300T1 by a qualified service technician.
Alligator Clip
Power On-Off/ Move
Cursor
Key
LED Alarm
LED Alarm
Remaining
Operating Time
Display
Confirm Action/
Number Increase
Key
Sensor
Buzzer

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Normal Mode Operation
Turning the Unit On
NOTE: ONCE THE UNIT IS TURNED ON IT CANNOT BE TURNED OFF AND
THE BATTERY LIFE COUNTDOWN TIMER BEGINS.
Press and hold the Right Key for 3 seconds, until the LCD displays , the buzzer
beeps, and the green LED flashes.
Warm-up Sequence
After powering on, the unit enters a warm up and self-test sequence, showing the firmware
version followed by the the High Alarm and Low Alarm
limits. If a sensor is not installed or cannot be identified by the instrument, the screen
flashes between and .
Remaining Time Display
After the start-up sequence, the unit enters normal mode and displays the remaining operating
time. Once the unit is running, it cannot be turned off manually and it stays on until
the battery loses power.
Alarms
Daily Alarm Test (Flashing ?)
Before each day’s use, the ? question mark will be flashing to remind the user to press the
Left [OK↑] Key once to test the function of the audio, visual and vibration alarms.
WARNING: IF ANY OF THE NEEDED ALARMS ARE NOT FUNCTIONING, DO
NOT USE THE INSTRUMENTAND RETURN IT FOR SERVICE.
Normal Alarm Function
If the gas concentration exceeds an alarm limit, the display shows the alarm value being
exceeded and gives audio, visual and vibration alarms according to the table at the
end of this manual (see Alarm Signal Summary). Once the concentration is no longer in an
alarm condition, the unit reverts back to the time display, but logs the alarm event in memory.
Calibration Fail Alarm (For Service Use Only)
If the instrument fails calibration, it will alternately display and the remaining run
time , once per second. The user can perform a manual Zero Calibration (see below)
on the instrument alone, but a full span calibration requires a Docking Box or CaliCase.

UNI 321 User’s Guide
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Bump Fail Alarm (For Service Use Only)
If the instrument fails a Bump test using the Docking Box or CaliCase, it will alternately
display and the remaining run time once per second.
Bump DueAlarm (For Service Use Only)
If the Bump Due setting is enabled and the due date has passed, the question mark will flash
twice per second while the display continues to show the remaining run time .

UNI 321 User’s Guide
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Configuration Mode
In the configuration mode the user can do a zero (fresh air) calibration and set the high and
low alarm thresholds. In general, use the Left Key to increase the number or confirm, use the
Right Key to move the cursor or move to the next programming item. Detailed configuration
settings can be performed using the mPower Suite software through the UNI Docking Box
MP100T or CaliCase MP300T1 (see UNI or CaliCase manual).
Entering and Exiting Configuration Mode
Press and hold the Left Key and the Right Key simultaneously for 3 seconds. The unit
prompts for a password by displaying and , with the first digit flashing. The
UNI 321 preset password is 0000. Use the Left [OK↑] Key to increase the number, and the
Right [→] Key to move the cursor. Once all four digits are entered, the cursor will move to
“OK”, causing it to flash. Press the Left Key to accept and enter the Configuration Mode.
To Exit Configuration Mode, scroll through the menu using the Right [→] Key until EXIT?
is shown, and press Left [OK↑].
Zero (fresh air) Calibration
Zero (Air) calibration is to set the base line for the sensor. It is done in fresh air or other
source known to be free of detectable gas (For an O2unit, “zeroing”sets the value to 20.9%,
so air must be used). When the LCD displays , press the Left Key to begin the air
calibration. The unit will start a 15 second count-down, and then display the calibration result
as either pass or fail . The user can abort the zero calibration during the 15
seconds count-down by pressing the Right Key, after which is displayed.
Set High and Low Alarm Levels
After Air calibration is completed or skipped, the unit displays to set the High Alarm
limit.
•Press Left to enter the menu. The current setting value is displayed,
with the first digit flashing:
•Use the Left Key to increase the current digit, cycling from 0 to 9:
•Use the Right Key to move the cursor to the next digit:
•After all digits are entered, use the Right Key to move to the “OK”
symbol, and press the Left Key to save the entry. The unit will display
SAVE for a few seconds while storing the value but it is not necessary
to press OK to initiate saving.
•The display automatically moves to set the Low Alarm limit
Adjust the Low Alarm in the same way as for the High Alarm.

UNI 321 User’s Guide
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Maintenance
NOTE: The UNI 321 is designed as a disposable instrument and does not need
maintenance under normal circumstances. However, in highly dusty or wet environments, it
may be necessary to replace the sensor filter as described below.
Replacing the Sensor Filter
The filter may need replacement under special circumstances such as use high-dust or
condensing environments. External filter clips are available to reduce the need to replace the
internal filter. Sheets of 5 “peel-and-stick” internal filters are available for this purpose:
1) Turn off the UNI 321 and place it face down on a soft surface.
2) Use a T10 Torx screwdriver to loosen (counterclockwise) each of the four screws.
3) Remove the top cover after carefully unplugging the buzzer connector.
4) Peel a filter from the sheet and center it over the sensor. Gently press down.
5) Re-connect in the buzzer connector and re-install the top cover.
6) Re-install the screws in the back cover. Be careful to not overtighten the screws.
CAUTION
•Change battery only in area known to be non-hazardous.
•Use only mPower battery, PN: 1.17.02.0002 or PN ER14505 cell manufactured by EVE Energy Co., LTD.
ATTENTION
•Changez la batterie uniquement dans une zone connue pour être non dangereuse.
•Utilisez uniquement la batterie au lithium de mPower, pièce No. 1.17.02.0002 (3.6V, 2700 mAH, taille AA)
ou celle deEVE Énergie Cie., Lté, pièce No. ER14505.
Maintenance should be performed only by a qualified person who has proper training
and fully understands the contents of the manual.
External Filter Clip
Sensor
Battery
Filter

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Specifications
Size
3.46 x 2.44 x 1.3 in.
(88 x 62 x 33mm)
Weight
4.4 oz. (125 g)
Temperature
-4 to 122°F (-20 to 50°C)
Humidity
5 to 95% relative humidity (non-condensing)
Alarm types
High alarm, low alarm adjustable
Over range alarm, battery low alarm
Alarm signal
Audible: 95 dB @ 30 cm
Visual: Bright red LED
Vibration: Built-in vibrator
Calibration
(Service Center)
2 point calibration, zero and span, power on zero (user-selectable).
The UNI detectors can also be bump tested and calibrated with the UNI
Docking Box or CaliCase System.
Event log
Latest 50 alarm events (display on unit or download using mPower Suite**
software)
Response time (t90)
20 seconds for most sensors. See TA-4 for details.
IP Rating
IP67
EMI/RFI
Compliant with EMC 2004/108/EC
Intrinsic Safety
Certifications
Class I, Div 1, Group ABCD
Class II, Div 1, Group EFG
Class III, Div 1
T4, -20°C ≤ Tamb ≤ +50°C
IECEx Ex ia IIC T4
II 1G Ex ia IIC T4
European Conformity
Battery & Life
AA size Lithium battery
Up to 3 years if used within specifications
Operating Life
1 year for MP101
2 years for MP102
3 years for MP103
**mPower Suite is the PC software used to show and set more configuration parameters of UNI 321
instrument through the UNI Single Docking Box MP100T or CaliCase System MP300T1.
CaliCase
mPower Suite (MP600)
Configuration Set-up Using mPower Suite
Software

UNI 321 User’s Guide
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Sensor Configurations
Sensor
Range
(ppm)
Resolution
(ppm)
Span
(ppm)
Low
(ppm)
High
(ppm)
Panel Ring
T90(s)
CO
0-500
1
50
35
200
Red
20
H2S
0-100
0.1
25
10
20
Light Blue
20
Sensor
Range
(%)
Resolution
(%)
Span
(%)
Low
(%)
High
(%)
Panel Ring
T90(s)
O2
0 - 30
0.1
0.0
19.5
23.5
Dark Blue
20
CAUTION
Use only mPower sensors.

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Alarm Signal Summary
LCD Display
Reason/Alarm Signals
Low alarm：
Buzzer 2 beeps per second
LED 2 flashes per second
1 vibration per second
“LOW” 2 flashes per second
High alarm：
Buzzer 3 beeps per second
LED 3 flashes per second
1 vibration per second
“HIGH” 2 flashes per second
Over-range：
Buzzer 3 beeps per second
LED 3 flashes per second
1 vibration per second
“OVER” and “500” 1 flash per second
Daily Alarm Check needed or Bump Due alarm:
?2 flashes per second
Bump Fail alarm:
Buzzer 1 beep per minute
LED 1 flash per minute
1 vibration per minute
“Bump” and “Remain Time” alternate display per second
Calibration Fail alarm:
Buzzer 1 beep per minute
LED 1 flash per minute
1 vibration per minute
“CAL” and “Remain Time” display alternately once per second

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Battery Low alarm：
Battery Empty prompt
Buzzer 1 beep per minute
LED 1 flash per minute
1 vibration per minute
Battery fail alarm：
Buzzer 1 beep per second
LED 1 flash per second
“bAT LoW”1 flash per second
Sensor error：
Buzzer 1 beep per second
LED 1 flash per second
“SEN Err”1 flash per second
Troubleshooting
Problem
Possible reason
Solution
Cannot turn on unit
Depleted or defective battery
Call authorized service center
Weak or No Response
Filter(s) plugged
Replace external filter clip or
internal filter
Buzzer, LED, or vibration
alarm inoperative
Bad buzzer, LEDs, or vibration alarm.
Call authorized service center
Blocked alarm port
Clean or unblock alarm port

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mPower Electronics, Inc.
3046 Scott Boulevard, Santa Clara, CA95054
Phone: [phone]
Fax: [phone]
[email protected]
www.mpowerinc.com