Honeywell X4 Series Instructions for use

X4 Series
Operating Instructions and
Maintenance Manual

X4 Series2
Alternative language versions are available for download from the Honeywell
Analytics website www.honeywellanalytics.com
Alternatieve talen versies zijn electronisch beschikbaar via onze web pagina van
Honeywell Analytics: www.honeywellanalytics.com
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website www.honeywellanalytics.com de Honeywell Analytics
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directa del website www.honeywellanalytics.com de Honeywell Analytics
Versioni in alter lingue, incluso l'italiano, sono disponibili e possono essere
scaricate dal sito web della Honeywell Analytics
www.honeywellanalytics.com
Zusätzliche Sprachen stehen zum Download auf folgender Webseite zur Verfü-
gung. www.honeywellanalytics.com

X4 Series 3
Important Notice
System configurations of the detector are available with 4, 3, 2, and 1 gas sensor(s)
installed in order to provide specific protection for most major industrial applications
and compliance requirements. Though this operating manual is provided for the
detector with 4 gas sensors installed, the information in the manual also applies to
other system configurations of the detector with 3, 2, and 1 gas sensor(s) installed
as well (See Section 8 System Configurations Options).
To ensure proper functioning of this product, do not use it until you read and
completely understand this operating manual.It contains operating and maintenance
procedures to ensure proper detector function. For your safety, it is required to
calibrate the detector periodically (See Section 4 Calibration).
Honeywell Analytics can take no responsibility for use of its equipment if it is not
used in accordance with the instructions stated in the relevant manual. If further
details are required but not provided in this manual, contact Honeywell Analytics
or their agent.
Honeywell Analytics shall not be liable for any incidental or consequential damages
in connection with any modifications, errors or omissions in this manual.
While every effort has been made to ensure accuracy in this publication, no
responsibility can be accepted for errors or omissions.This publication is not intended
to form the basis of a contract, and the company reserves the right to amend the
design and specifications of the detectors without notice. Note too that data may
change as well as legislation, and you are advised to obtain copies of the most
recently issued regulations, standards and guidelines.
WARNINGS AND CAUTIONS
Substitution of any components may impair intrinsic safety.
Use only approved memory cards, part # 2566-0435, which are available
from Honeywell Analytics. Use of any other manufacturer or type will violate
intrinsic safety requirements.
Activation of the detector after the date on the packaging means less usable
life and shorter warranty period.
Use only approved ‘AA’ Alkaline Batteries, Energizer®E91 or EN91: or use
only approved 'AA' NiMH recharchable cells. Quest 1500mAh, order part
number 2566-0454 (Quest part number HL-AAC1500). Use of any other
manufacturer or type will violate intrinsic safety requirements.
Use only two new batteries of the same type, when replacing the batteries.
The optional NiMH rechargeable batteries must be in fully charged condition
and replaced as a new pair. Do not attempt to charge the optional NiMH cells
in potentially hazardous areas
Replace batteries as soon as the detector emits a low battery alarm.
Battery life will be reduced at low temperatures.
Replace batteries only in an area known to be NON-HAZARDOUS.
Instrument containsno userserviceableparts.ContactHoneywellAnalyticsforany
servicing requirements.
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(cont’d)

X4 Series4
Perform a Self-Test prior to each day’s use (See Section 3-1 Performing a
Self-Test).
Periodicallytestthesensors’responsetogasbyexposingthemonitortoatargetgas
concentrationthatexceedsthe alarmsetpoints.Verifyproperoperationofaudible,
visual and vibrating alarms during this test.
Use only factory supplied calibration gas for calibration. Accurate calibration
can be achieved only if specific concentrations of the correct gases are
used.
Calibration should be carried out in a well-ventilated area to avoid
contaminants.
Calibration cannot be carried out when the detector emits a low battery
alarm.
Do not use the detector in oxygen-enriched atmospheres.
The flammable sensor’s sensitivity can be adversely affected by exposure
to certain substances called “poisons”. Sulfur compounds, phosphorus
containing compounds, halogens, silicone or lead containing compounds
are examples of such poisons. Every effort should be made to avoid
exposure to these substances. When the detector is exposed to such
substances, a gas test should be performed on the flammable sensor
to verify its accuracy and a calibration performed if necessary.
Extended exposure of the detector to certain high concentrations of flammable
gases and air may stress the flammable detector element, which can
seriously affect its performance. If an alarm occurs due to high concentration
of flammable gases, recalibration should be performed, or if needed, the
sensor replaced.
Do not use solvents, soap, polishes or any product containing silicon
compounds to clean the detector as these can cause damage to the
sensors.
Do not expose the detector to electrical shock and/or severe mechanical
shock. When the detector is exposed to such shocks, a check should be
performed on the sensors to verify its accuracy and a calibration performed
if necessary.
Disabling one or more installed sensors configures the detector to a 1, 2,
or 3-gas unit. No protection is provided for the gas targeted by the disabled
sensor(s).
Do not install or remove the memory card in the detector or attempt to read,
download or write to the memory card using a memory card reader and/or
computer in potentially hazardous atmospheres.
Do not remove the batteries from the detector while the power is on.This can
cause fatal damage to the optional memory card if installed.
No gas will be detected while in the set-up mode or the gas exposure status
review mode.
The desktop USB memory card reader and data logging kit are not
certified intrinsically safe and must not be used in potentially hazardous
atmospheres.
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X4 Series 5
Contacting Honeywell Analytics Customer Business Centers
Americas (Minimax4 series) Europe and ROW (ImpulseX4 series)
400 Sawgrass Corporate Parkway Wilstrasse 11-U11
Suite 100 Ch-8610 Uster
Sunrise, Florida 33325 Switzerland
Tel: [phone] Tel: [phone]
Toll free: [phone]
Fax: [phone] Fax: [phone]
[e-mail] [e-mail]
Or visit our web site at www.honeywellanalytics.com

X4 Series6
Additional Warnings and Cautions for Canadian Certification
and Other Global Certification Bodies
WARNING
Substitution of any components may impair intrinsic safety.
AVERTISSEMENT
La substitution de composants peut compromettre la sécurité intrinsèque.
CAUTION
For safety reasons this equipment must be operated and serviced by qualified
personnel only. Read and understand instruction manual completely before
operating or servicing.
ATTENTION
Pour des raisons de sécurité, cet équipement doit être utilisé, entretenu et réparé
uniquement par un personnel qualifié. Étudier le manuel d’instructions en
entier avant d’utiliser, ’entretenir ou de réparer l’équipement.
CAUTION
High off-scale reading may indicate explosive concentration.
ATTENTION
Des lectures supérieures à l’échellepeuvent indiquer des concentrations
explosives.
CAUTION
Before each day’s usage sensitivity must be tested on a known concentration of
methane equivalent to 25-50%LEL. Accuracy must be within +/-20% of actual
concentration. Accuracy may be corrected by performing proper calibration on
the detector.
ATTENTION
Chaque jour, avant toute utilisation, tester la sensibilité sur une concentration
connue de méthane équivalente à 25-50% LEL. La précision doit être comprise
dans une plage de +/-20% de concentration réelle. A précision peut être
corrigée en effectuant un étalonnage approprié du détecteur.

X4 Series 7
WARNING
Under proper calibration procedures, repetitive calibration failures could indicate
that the sensor is either approaching its end of life, or it has been seriously
contaminated, or both.
AVERTISSEMENT
Si Les Procédures D’étalonnage Sont Bien Respectées, Des Défauts D’étalonnage
Répétitifs Peuvent Indiquer Que Le Capteur Arrive En Fin De Vie Ou Qu’il A
Été Sérieusement Contaminé, Ou Les Deux.
WARNING
The detector must not be removed from its rubber boot during transportation or
use, and if the rubber boot is removed for servicing or any other reason, it must
be replaced before the instrument is placed back in service.
AVERTISSEMENT
Le support en caoutchouc du détecteur ne doit jamais être retiré pendant
son utilisation ou son transport. Si pour un quelconque motif, d’entretien ou
autre, cette protection a été retirée, elle doit toujours être remise en place avant
d’utiliser l’instrument.
Only the combustible gas detection portion of this instrument has been assessed
for performance.
Seul le fonctionnement de la partie détection de gaz
combustible de cet instrument a été évalué
The csa symbol, “exia”, represents intrinsically safe, or in french, sécurité
intrinsèque.
Le symbole csa “exia” signifie “sécurité intrinsèque”
WARNING
Use only the approved Honeywell Analytics charger (part number 2566-0484)
when charging the sealed rechargeable battery pack (part number 2566-0482 for
Minimax4 series and part number 2566-0462 for Impulse X4 series). Use of any
other charger will void the intrinsic safety certification of the instrument.
AVERTISSEMENT
Utiliser uniquement le chargeur Honeywell Analytics homologué (référence 2566-
0484) lors de la mise en charge du kit batterie étanche rechargeable (référence
2566-0482 pour la série Minimax4 et référence 2566-0462 pour la série Impulse X4).
En cas d’utilisation de tout autre chargeur, la certification de sécurité intrinsèque de
l’instrument sera nulle et non avenue.

X4 Series8
WARNING
Use only the Honeywell Analytics supplied ac adapter (part number 2566-0483)
to connect to the cradle charger (part number 2566-0484).
AVERTISSEMENT
Utiliser uniquement l’adaptateur à courant alternatif Honeywell Analytics
fourni (référence 2566-0483) pour connecter l’instrument au chargeur socle
(référence 2566-0484).
WARNING
The charger units contain no user serviceable parts. No attempt should be
made to alter or repair the charger.
AVERTISSEMENT
Les chargeurs ne comportent pas de pièces d’entretien sur lesquelles
l’utilisateur peut intervenir. Ne pas essayer de modifier ni de réparer le
chargeur.

X4 Series 9
1. Introduction .......................................................................11
1-1. Product Overview ...................................................11
1-2. Basic Button Operation..........................................12
1-3. LCD Display.............................................................12
1-4. Standard Accessories ............................................13
2. Turning the Detector On and Off ......................................13
2-1. Turning the Detector On .........................................13
2-1-1. Displaying the Firmware Version ....................13
2-1-2. Clearing the STEL and TWA Values ...............14
2-1-3. Checking the Memory Card............................14
2-1-4. Power-Up Self-Test.........................................15
2-1-5. Checking the Calibration Due Date ................15
2-2. Turning the Detector Off .........................................15
3. Operation ...........................................................................16
3-1. Performing a Self-Test ............................................16
3-2. Measuring Mode......................................................17
3-2-1. Flipping the Display ........................................18
3-3. Testing Sensors and Alarms (Bump Testing) .......18
3-4. Gas Alarms ..............................................................18
3-4-1. Gas Alarms for the Minimax4 series...............19
3-4-2. Gas Alarms for the ImpulseX4 series.............19
3-5. Gas Exposure Status Review ................................21
3-6. Confidence Flash/Beep ..........................................22
3-7. Low Battery .............................................................22
3-8. Data Logging ...........................................................22
4. Calibration..........................................................................24
4-1. Calibration Prompt..................................................24
4-2. Zero Calibration (Span Calibration for Oxygen) ..24
4-3. Span Calibration (for Flammable and Toxic
Sensors Only)..........................................................25
4-3-1. Pass Code Input .............................................26
4-3-2. Span Gas Information.....................................26
4-3-3. Span Gas Setting ...........................................27
4-3-4. Gas Search and Countdown ..........................27
4-3-5. Span Calibration Result..................................28
5. Set-Up Mode ......................................................................29
5-1. Entering the Set-Up Mode ......................................30
5-2. Changing the Detector Set-Up...............................31
5-3. Exiting the Set-Up Mode.........................................31
Table of Contents

X4 Series10
6. Maintenance.......................................................................32
6-1. Replacing the Batteries..........................................32
6-2. Installing or Removing the Memory Card.............33
6-4. Replacing the Expired Sensor...............................34
7. Optional Accessories........................................................35
8. System Configuration Options ........................................36
8-1. System Configurations for the Minimax4 series..36
8-2. System Configurations for the ImpulseX4 series 36
Appendix A ............................................................................37
A-1. Calibration Mode Menu Structure 1/2...................37
A-2. Calibration Mode Menu Structure 2/2...................38
A-3. Set-up Mode Menu Structure 1/4 ..........................39
A-4. Set-up Mode Menu Structure 2/4 ..........................40
A-5. Set-up Mode Menu Structure 3/4 ..........................41
A-6. Set-up Mode Menu Structure 4/4 ..........................42
Appendix B ............................................................................43
B-1. Sensor Cross-Sensitivity.......................................43
B-1-1. H2S and CO SureCell Cross-Sensitivity .........43
B-1-2. O2Cross-Sensitivity .......................................43
B-1-3. Flammable Cross-Sensitivity..........................44
B-2. Flammable Lower Explosive Limit........................45
Appendix C ............................................................................46
C-1. Warranty ..................................................................46
C-2. Accuracy Statement...............................................47
C-3. Declaration..............................................................48
C-3-1. Declaration for the Minimax4 series...............48
C-3-2. Declaration for the ImpulseX4 series .............49
Appendix D ............................................................................50
D-1. Specifications.........................................................50
D-1-1. Specifications for the Minimax4 series...........50
D-1-2. Specifications for the ImpulseX4 series .........51

X4 Series 11
1. Introduction
The X4 series is an easy to use personal gas detector, designed for monitoring
the atmosphere for potentially hazardous levels of flammables, oxygen, carbon
monoxide, and hydrogen sulfide. It uses a front-mounted LCD display to show
readings of the gases being measured and other useful information. A loud audible
alarm and bright visual alarm are used to warn users when the concentrations of
measured gases exceed the alarm set points. It has built-in cell decay compensation,
thermal shock protection, and Reflex™, a patented cell check technique, for
maximum reliability.
1-1. Product Overview
Visual Alarm
Sensor Grille
Audible Alarm
LCD Display
Locking Tab
Crocodile Clip
Battery Holder
UP Button
DOWN Button
ON/OFF Button
Threaded Hole for
Flow Adaptor
Left
Right
Front
Bottom

X4 Series12
1-2. Basic Button Operation
ON/OFF button
Turn on the detector
Turn off the detector
Self-Test
ZERO calibration
SPAN calibration
Accept a user set-up change
Latched Alarm acknowledgement
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UP button
Scroll through status or menu
options
Increase value
Activate/deactivate flipped
display
Activate backlight
DOWN button
Scroll through status or menu
options
Decrease value
Activate backlight
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1-3. LCD Display
Test Pass Icon
Test Fail Icon
High Peak Icon
Low Peak Icon (for O2only)
Alarm Icon
Data Logging Icon
Battery Icon
Pass Code Protection Icon
%Vol Unit Icon
%LEL Unit Icon
STEL Icon
TWA Icon
Alarm Level 1 Icon
Alarm Level 2 Icon
(for flammable and toxic)
Zero Calibration Icon
Span Calibration Icon
Gas Label Icon
O2Deficiency Alarm Icon
O2Excess Alarm Icon
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
12 3 4 5 6 78
9
10
11
1213
14
15
16
17
The LCD display has a backlight that
will operate automatically whenever
an alarm occurs, and also whenever
any button is pressed. To turn on the
backlight while staying in the measuring
mode in a low light area, press the UP
or DOWN button once.

X4 Series 13
1-4. Standard Accessories
The items listed below are included with the X4 series. For damaged or missing
parts, contact Honeywell Analytics or their agent.
Part No. Description Qty
2566-0424 Calibration Certicate 1
2566-0422 Quick Start Guide 1
2566-0433 Alkaline Batteries (1.5V AA), Energizer®E91 or EN91 2
2566-0426N Flow Adaptor (Neotronics) 1
2566-0426L Flow Adaptor (Lumidor) 1
2566-0480 Protective Rubber Boot (Neotronics) 1
2566-0445 Protective Rubber Boot (Lumidor) 1
2566-0443 Tubing (45 cm/18”) 1
2566K0130 Crocodile Clip Kit 1
2566-0420 Manual 1
2. Turning the Detector On and Off
Before turning the detector on for the first time, you will need to install two “AA”
alkaline (Energizer®E91 or EN91) batteries (See Section 6-1 Replacing the
Batteries).
A sealed rechargeable battery pack (part number 2566-0482 for the Minimax,
and 2566-0462 for the Impulse) is also available (See Section 7 Optional
Accessories)
If you plan on logging data and have a memory card, now is also a good time to
install the card (See Section 6-2 Installing or Removing the Memory Card).
2-1. Turning the Detector On
Press and hold the ON/OFF button for 2 seconds and the detector will turn on.
2-1-1. Displaying the Firmware Version
The detector will display the version of the firmware.

X4 Series14
2-1-2. Clearing the STEL and TWA Values
When the non-zero STEL and/or TWA values are carried over from the previous
measurement, a “Delete no” prompt will be displayed with the gas labels and the STEL
and TWA icons. (When the STEL and TWA values are zero, the “Delete no” prompt
will not be displayed.)
Press the UP or DOWN buttons to scroll
to “no” or “YES” and press the ON/OFF
button to select.
or
When “no” is selected, the recorded STEL and TWA values will be used as initial
STEL and TWA values for the current session. When “YES” is selected, the STEL
and TWA values will be cleared.
2-1-3. CHECKING THE MEMORY CARD
The detector will check the memory card in the memory card slot. When a properly
formatted FAT16 memory card with a data full condition is detected, a “Data Fu”message
will be displayed followed by a “Delete no” prompt. (When a properly formatted FAT16
memory card is not full of data, the “Data Fu” message and the “Delete no” prompt will
not be displayed).
Press the UP or DOWN buttons to scroll to “no” or “YES” and press the ON/OFF
button to select.
or

X4 Series 15
When “no” is selected, the detector keeps the current data file and the Data Logging
icon will not be displayed in the measuring mode which indicates that no data is
being logged. When “Yes” is selected, the detector deletes the current data file and
creates a new file for data logging. The Data Logging icon will be displayed in the
measuring mode which indicates that data is being logged.
The detector does not support either FAT32 or NTFS format for the memory card.
When a memory card with non-FAT16 format is detected, a “Card Er” message will
be displayed with a single beep. (When a properly formatted FAT16 memory card
is detected, a “Card Er” message will not be displayed.)
The Data Logging icon will not be displayed in the measuring
mode which indicates that no data is being logged.
2-1-4. Power-Up Self-Test
The detector will beep and perform a power-up Self-Test. If the detector passes
the Self-Test, the Test Pass icon is displayed. If the Test Fail icon is displayed
and the Test Pass icon blinks with 1 beep and 1 flash every 5 seconds, then the
detector has failed the Self-Test (See Section 3-1 Performing a Self-Test).
2-1-5. Checking the Calibration Due Date
The detector checks the calibration due date stored in the detector after the Power-Up
Self-Test. When the number of days remaining until calibration is due reaches zero,
a "CAL dUE dAY 0" message will be displayed to remind the user that a calibration
needs to be performed.
To perform the calibration, see Section 4 Calibration.
2-2. Turning the Detector Off
To turn off the detector, press and hold the ON/OFF button while in the measuring mode.
A countdown will be displayed for 5 seconds, and then the detector will beep and
turn off.

X4 Series16
3. Operation
3-1. Performing a Self-Test
When the ON/OFF button is pressed, the detector checks the sensor, circuit, batteries,
and audible, visual, and vibrating alarms.
The detector will do the following:
=Turn on all the display elements
=Test the audible, visual, and vibrating alarms
=Check the battery, electronic circuit and sensors
aa
Display the level 1 (flammable and toxic low, O2excess) and level 2 (flammable
and toxic high, O2deficiency) alarm set points
Display the STEL and TWA alarm set points (for CO & H2S only).
aaa
Level 1 Level 2 STEL
TWA
*Examples shown for default settings of each gas for the Minimax4 series.
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X4 Series 17
Display the result of the Self-Test as follows:
Test Pass Test Fail
Self-Test
Result Display Audible Alarm Visual Alarm
Pass None None
Fail 1 beep every 5
sec
1 flash every 5
sec
Additionally, the detector will periodically check its batteries, electronic circuit and
sensors.
If it passes, the Test Pass icon will be displayed. If it fails, the Test Fail icon
will be displayed and the Test Pass icon will blink with 1 beep and 1 flash every
5 seconds.
Note
IftheSelf-Testhasfailed,repeattheSelf-Test.Ifasecondfailureoccurs,contact
Honeywell Analytics or their agent
3-2. Measuring Mode
The detector may be used as either a “diffusion” or “sample-draw” type monitoring
device. In normal operation, the detector is worn on the belt or held by hand. Once
turned on, the detector monitors continuously. The atmosphere being measured
reaches the sensor by diffusion through the vents of the grille cover. Normal air
movements are enough to carry the sample to the sensors, which react to the
concentrations of the gases being measured. This type of “diffusion” operation
monitors only the atmosphere that immediately surrounds the detector. It is possible
to use the detector to sample locations that are remote from the detector by using
a flow adaptor and an optional hand aspirator. When using the flow adaptor, ensure
that the sample flow direction matches the arrow mark.
The gas types and concentration values for each sensor are displayed. If fewer than
four sensors are installed, the unused sensor position(s) will be blank.
Normal Display
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X4 Series18
3-2-1. Flipping the Display
The LCD display can be flipped upside down by pressing and holding the UP button
for 2 seconds. This allows easy reading when the detector is clipped to a waist belt
or chest pocket.
Flipped Display
3-3. Testing Sensors and Alarms (Bump Testing)
To maintain optimal accuracy, the detector should be periodically supplied with
a known concentration test gas (bump test) and if the readings are outside of
15% of the applied gas concentration, a span calibration should be performed,
under conditions of standard temperature (15°C to 25°C), humidity and pressure.
Follow local regulations and/or your company’s policy on the frequency of bump
testing. For more information on test gas, contact your local Honeywell Analytics
representative.
3-4. Gas Alarms
The detector has two levels of instantaneous gas alarms, of which the level 2
(flammable and toxic high, O2deficiency) alarm is more urgent than the level 1
(flammable and toxic low, O2excess) alarm for flammable and toxic.The O2excess
and deficiency alarms are equally important. It also has a 15-minute STEL alarm
and an 8-hour TWA alarm for the carbon monoxide and hydrogen sulfide sensors.
Note
STEL (Short Term Exposure Limit) and TWA (Time-Weighted Average)
comply with relevant agency standards.
TWA is an 8-hour time-weighted average, so if the work shift exceeds 8 hours,
the readings will still be logged but averaged over the 8-hour period.
The user can set up the level 1 alarm point, level 2 alarm point, STEL alarm point,
TWA alarm point and alarm latch mode in the set-up mode. (See Section 5 Set-Up
Mode).

X4 Series 19
3-4-1. Gas Alarms for the Minimax4 series
The Minimax4 series is supplied with the following alarm increments, alarm ranges,
and default alarm set points:
All
Alarms
Level 1 (Flammable
and Toxic Low, O2
Excess) Alarm
Level 2 (Flammable
and Toxic High, O2
Deciency) Alarm
STEL Alarm TWA Alarm
Gas Type Increment Range Default Range Default Range Default Range Default
Oxygen (O2)0.1% Vol 21.5~30%
Vol
23.5%
Vol
1-20.5%
Vol
19.5%
Vol N/A N/A N/A N/A
Flammable
(Exp)
1% LEL
or
0.01% Vol
2~60%
LEL
or
0.10~ 3%
Vol
10%
LEL
or
0.50%
Vol
2~60%
LEL
or
0.10~3%
Vol
20%
LEL
or
1%
Vol
N/A N/A N/A N/A
Carbon
Monoxide
(CO)
1 ppm 5-999
ppm 35 ppm 5~999 ppm 100 ppm 5~999 ppm 100 ppm 5~999 ppm 35 ppm
Hydrogen
Sulde (H2S) 1 ppm 3-250 ppm 10 ppm 3~250 ppm 15 ppm 3~250 ppm 15 ppm 3~250 ppm 10 ppm
3-4-2. Gas Alarms for the ImpulseX4 series
The ImpulseX4 series is supplied with the following alarm increments, alarm ranges,
and default alarm set points:
All
Alarms
Level 1 (Flammable and
Toxic Low, O2Excess)
Alarm
Level 2 (Flammable
and Toxic High, O2
Deciency) Alarm
STEL Alarm TWA Alarm
Gas Type Increment Range Default Range Default Range Default Range Default
Oxygen (O2)0.1% Vol 21.5~30%
Vol 23% Vol 1-20.5% Vol 19% Vol N/A N/A N/A N/A
Flammable
(Exp)
1% LEL
or
0.01% Vol
2~60% LEL
or
0.10~ 2.64%
Vol
10%
LEL
or
0.44%
Vol
2~60% LEL
or
0.10~2.64%
Vol
20%
LEL
or
0.88%
Vol
N/A N/A N/A N/A
Carbon
Monoxide
(CO)
1 ppm 5-999 ppm 35 ppm 5~999 ppm 400 ppm 5~999
ppm 200 ppm 5~999 ppm 30 ppm
Hydrogen
Sulde (H2S) 1 ppm 3-250 ppm 10 ppm 3~250 ppm 40 ppm 3~250 ppm 10 ppm 3~250 ppm 5 ppm
Note
For flammable, carbon monoxide, and hydrogen sulfide, level 1 alarm can
only be set to less than or equal to the level 2 alarm. When level 1 and
level 2 alarms are set to the same value, the level 2 alarm action overrides
the level 1 alarm.
The maximum value of the level 2 alarm in %Vol for flammable gas varies
depending on the gas. (See Appendix B-2 Flammable Lower Explosive
Limit.)

X4 Series20
If an alarm occurs, the icons blink and relevant alarm level icons, s(Level 1 for
flammableandtoxic,andO2excess), (Level2forflammableandtoxic),t(O2deficiency),
(STEL), or (TWA) will be displayed according to the alarm level for the gas
type in question.
Alarm Type Display* Audible Alarm Visual Alarm Vibrating Alarm
Level 1 Alarm 3 Tones/ 2 Beeps
per 1 second
2 Flashes
per 1 second
once every 2
seconds
Level 2 Alarm 5 Tones/ 4 Beeps
per 1 second
4 Flashes
per 1 second
once every 1
second
STEL Alarm 5 Tones/ 4 Beeps
per 1 second
4 Flashes
per 1 second
once every 1
second
TWA Alarm 5 Tones/ 4 Beeps
per 1 second
4 Flashes
per 1 second
once every 1
second
* Examples shown for default settings of each gas for the Minimax4 series.
Note
In latching alarm mode, once an alarm occurs, the audible, visual and
vibrating alarms continue to operate even after the atmospheric hazard
has cleared. By pressing the ON/OFF button, the alarm will be cleared
(after the atmospheric hazard has cleared). Any subsequent alarm will
reactivate the audible, visual and vibrating alarms.
In non-latching alarm mode, should the gas alarm occur the detector
would enter alarm condition. When the reading returns to a normal level,
the audible, visual and vibrating alarms will stop.
If the measured reading exceeds the range of the sensor, the full-scale
value will blink.
See Section 5 Set-up Mode for more information on Latching/Non-
Latching Alarms