Sperian ToxiLtd User manual

0
ToxiLtd®
Single Gas
Detector
Reference Manual
Sperian Instrumentation
651 South Main Street
Middletown, CT 06457
[phone]
[phone]
Fax [phone]
Part number 13-266
Version 2.00
23AUG2007

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THE TOXILTD®PERSONAL PORTABLE GAS DETECTORS HAVE
BEEN DESIGNED FOR THE DETECTION AND MEASUREMENT OF
POTENTIALLY HAZARDOUS ATMOSPHERIC CONDITIONS.
IN ORDER TO ASSURE THAT THE USER IS PROPERLY WARNED OF
POTENTIALLY DANGEROUS ATMOSPHERIC CONDITIONS, IT IS
ESSENTIAL THAT THE INSTRUCTIONS IN THIS REFERENCE MANUAL
BE READ, FULLY UNDERSTOOD, AND FOLLOWED.
ToxiLtd®Reference Manual
Sperian Instrumentation Part Number 13-266
Version 2.00
Copyright 2007
by
Sperian Protection Instrumentation, LLC
Middletown, Connecticut 06457
All rights reserved.
No page or part of this operation manual may be reproduced in
any form without written permission of the copyright owner
shown above.
Sperian Instrumentation reserves the right to correct
typographical errors.

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Table of Contents
Certifications........................................................................................ 3
ATEX Label Requirement.................................................................... 3
Warnings and Cautions ...................................................................... 3
A. Signal Words .........................................................................................................3
B. Warnings................................................................................................................4
1. Overview......................................................................................... 5
1.1 Methods of sampling ..........................................................................................5
1.2 Sensors.............................................................................................................. 5
1.2.1 Sensor ranges and resolutions. ..................................................................5
1.2.2 ToxiLtd O2warm-up phase .........................................................................5
1.2.3 F1: Missing sensor during startup............................................................... 5
1.3 Alarm logic .........................................................................................................6
1.3.1 Gas alarms.................................................................................................6
1.3.2 Silence warning alarms ..............................................................................6
1.3.3 Calibration due notices ...............................................................................6
1.3.4 Low battery alarms .....................................................................................6
1.4 Design components ...........................................................................................6
1.5 Standard accessories.........................................................................................7
1.6 Value pack kits...................................................................................................7
2. Field Operation .............................................................................. 7
2.1 Turning the ToxiLtd on .......................................................................................7
2.1.1 O2version start up sequence......................................................................7
2.1.2 Toxic version start up sequence .................................................................7
2.1.3 Start up sequence ...................................................................................... 7
2.2 Functions ........................................................................................................... 8
2.2.1 View max gas readings .............................................................................. 8
2.2.2 View alarm levels .......................................................................................8
2.3 Calibration due notices.......................................................................................9
2.4 Low battery alarms.............................................................................................9
2.5 Turning the ToxiLtd off .......................................................................................9
2.6 Sampling.......................................................................................................... 10
2.6.1 Sample draw kit usage .............................................................................10
3. Calibration.................................................................................... 10
3.1 Verification of accuracy ....................................................................................10
3.1.1 Verifying accuracy and response: ToxiLtd O2........................................... 10
3.1.2 Verifying toxic sensor performance........................................................... 11
3.2 Effect of contaminants on ToxiLtd sensors.......................................................11
3.2.1 Effects of contaminants on oxygen sensors.............................................. 11
3.2.2 Effects of contaminants on toxic gas sensors ...........................................11
3.3 Fresh air/zero calibration.................................................................................. 12
3.4 Functional (bump) testing for ToxiLtd with toxic gas sensor..............................12
3.5 Span Calibration for ToxiLtd with toxic gas sensor ...........................................13
3.6 Failure to calibrate............................................................................................14
3.6.1 Fresh air/zero calibration failure................................................................14
3.6.1.1 Reason for fresh air/zero calibration failures....................................................14
3.6.2 Span calibration failure .............................................................................14
3.6.2.1 Sensor out of range (no CAL)..........................................................................14
3.6.2.2 No gas............................................................................................................14

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3.6.2.3 Causes for span cal failure..............................................................................14
3.6.3 Forced fresh air/zero calibration ...............................................................14
3.7 Fresh air/zero calibration in a contaminated atmosphere .................................15
4. Event logging............................................................................... 15
4.1 Initiating communications.................................................................................15
Appendices ........................................................................................ 16
Appendix A: Sensor Cross-Sensitivity Chart ................................................................16
Appendix B: Default toxic sensor calibration gas settings ............................................16
Appendix C: Calibration Frequency ............................................................................. 17
Sperian Instrumentation Warranty Gas Detection Products ........ 18
Certifications
The ToxiLtd®carries the following certifications:
UL and c-UL, Class I, Division 1, Groups A,B,C,D, Temp Code T4.
UL Class II, Division 1, Groups E,F,G
ATEX Certification:
II 2 G EEx ia IIC T4
UL International DEMKO A/S 04 ATEX 0327520
IECEx Ex ia IIC T4
CQST (China)
ATEX Label Requirement
Warnings and Cautions
A. Signal Words
The following signal words, as defined by ANSI Z535.4-1998, are used in the ToxiLtd
Operator’s Guide.
indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
indicates a potentially hazardous situation, which if not
avoided, may result in moderate or minor injury.
CAUTION used without the safety alert symbol indicates a potentially
hazardous situation which, if not avoided, may result in property damage.

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B. Warnings
1. The ToxiLtd personal, portable gas detectors have been
designed for the detection of either oxygen deficiencies or specific toxic gas
accumulations. An alarm condition indicates the presence of a potentially life-
threatening hazard and should be taken very seriously.
2. In the event of an alarm condition it is important to follow
established procedures. The safest course of action is to immediately leave the
affected area, and to return only after further testing determines that the area is
once again safe for entry. Failure to immediately leave the area may result in
serious injury or death.
3. The accuracy of ToxiLtd instruments equipped with a toxic
gas sensor should be checked periodically with known concentration calibration
gas. Failure to check accuracy can lead to inaccurate and potentially dangerous
readings. ToxiLtd instruments equipped with an oxygen sensor should be
periodically calibrated in fresh air.
4. A ToxiLtd equipped with a toxic gas sensor that fails
calibration may not be used until testing with known concentration test gas
determines that accuracy has been restored, and the instrument is once again fit
for use. Instruments equipped with an oxygen sensor that fail calibration may
not be used until testing with fresh air determines that accuracy has been
restored and the instrument is once again fit for use. An instrument that cannot
be calibrated or is found to be out of tolerance must be replaced immediately.
5. Do not reset the calibration gas concentration setpoints in
the ToxiLtd unless the concentrations of your calibration gas differ from the
concentrations of the calibration gas that is normally supplied by Sperian for use
in calibrating the ToxiLtd.
6. Use of non-standard calibration gas and/or calibration kit
components when calibrating the ToxiLtd can lead to dangerously inaccurate
readings and may void the standard Sperian warranty.
Sperian offers calibration kits and long-lasting cylinders of test gas specifically
developed for easy calibration. Customers are strongly urged to use only
Sperian calibration materials when calibrating the ToxiLtd.
7. Substitution of components may impair intrinsic safety.
8. For safety reasons the ToxiLtd must be operated by
qualified personnel only. Read, understand and follow the directions set forth in
this reference manual before operating the ToxiLtd.
9. The ToxiLtd has been tested for intrinsic safety in
Explosive Gas/AIR (max. 21.0% O2).
10. Do not open the ToxiLtd. There are no user serviceable
parts inside of the instrument.

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1. Overview
The ToxiLtd is a single sensor gas
detector that is designed to detect either
oxygen (O2) or one of a variety of toxic
gases. The ToxiLtd’s sensor type is
shown on the front of the instrument and
is also shown on the display during the
startup sequence.
ToxiLtd gas detectors are disposable
instruments that are designed to operate
for 2 full years from the date of activation.
ToxiLtd models equipped with a toxic gas
sensor (CO, H2S or SO2) must be
activated within 6 months of the
manufacturing date. Oxygen versions
must be activated within 1 month of the
manufacturing date. If the instrument is
not turned on by the “must be activated by
date”, the instrument will activate itself
and the 2-year countdown will begin
automatically.
Upon delivery, the screen of the ToxiLtd
will be blank except for the negated horn
icon.
If the “must be activated by date” has
passed and the instrument has activated
itself, the instrument will show three lines
on the screen with the negated horn icon.
Contact Sperian or your distributor if
three lines are displayed when you first
receive the detector.
The ToxiLtd is delivered with a pre-
installed lithium thionyl chloride (LiSOCl2)
battery capable of powering the
instrument for the full 2 years of the
instrument’s operating life. After the 2-
year instrument life cycle is up, the
instrument will turn itself off.
Note: Early production runs of the
oxygen version of the ToxiLtd were
referred to as the “OxyLtd”. The
instructions contained in this manual
that refer to the ToxiLtd Oxygen (O2)
are valid for the OxyLtd with similar
instrument firmware.
1.1 Methods of sampling
The ToxiLtd may be used in diffusion
mode, or with the manual sample draw kit
that is available separately. In either
mode, the atmosphere must reach the
sensor for the instrument to register a
reading. In diffusion mode, the
atmosphere reaches the sensor by
diffusing through the sensor port on the
front of the instrument. Normal air
movements are enough to carry the
sample to the sensor. During remote
sampling, the gas sample is drawn into
the sensor compartment through the
probe assembly and a length of tubing.
See section 2.6 for more details on
sampling the atmosphere.
1.2 Sensors
Toxic sensor versions of the ToxiLtd use
an electrochemical toxic gas sensor. The
ToxiLtd O2uses a galvanic oxygen
sensor. Both types of sensor have been
designed to minimize the effects of
common interfering gases. These
sensors provide accurate, dependable
readings for gases commonly
encountered in industrial applications.
1.2.1 Sensor ranges and resolutions.
Sensor Range Resolution
CO 0-1000 PPM 5 PPM
H2S 0 -200 PPM 2 PPM
SO20 – 20 PPM 0.1 PPM
O20-30%/Vol. 0.2%/Vol.
1.2.2 ToxiLtd O2warm-up phase
The ToxiLtd O2requires a one-hour
warm-up phase from the moment of
activation until actual use. See section
2.1.1 for further details.
1.2.3 F1: Missing sensor during
startup
If the ToxiLtd fails to detect the sensor
during startup, it will show “F 1” with the
caution symbol following the software
version screen at startup. This is covered
in greater detail in section 2.1.3.

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1.3 Alarm logic
1.3.1 Gas alarms
When an alarm set point is exceeded a
loud audible alarm sounds, the bright red
LED alarm light flashes and the display
will indicate whether it is a warning alarm
or a more serious danger alarm. If the
ToxiLtd is equipped with the optional
vibrating alarm, it will also be activated
during an alarm condition.
For oxygen sensor-equipped instruments,
the warning alarm is sounded for oxygen
enrichment and the danger alarm is
sounded for oxygen deficiency.
Instruments equipped with a toxic gas
sensor have two ascending alarm set
points. The lower alarm set point is the
warning alarm, while the higher alarm set
point is the danger alarm.
Sensor Warning Alarm Danger Alarm
CO 35 PPM 100 PPM
H2S 10 PPM 20 PPM
SO22 PPM 5 PPM
O223.5%/Vol. 19.5%/Vol.
Default Warning and Danger Alarm Settings
In the event of an
alarm condition it is important to follow
established procedures. The safest
course of action is to immediately
leave the affected area, and to return
only after further testing determines
that the area is once again safe for
entry. Failure to immediately leave the
area may result in serious injury or
death.
1.3.2 Silence warning alarms
The ToxiLtd’s audible and vibrating (if so
equipped) alarms can be turned off during
an alarm condition by pressing the MODE
button if this function has been enabled
with BioTrak software. The visual warning
alarm light and readings will continue to
indicate the alarm.
1.3.3 Calibration due notices
The ToxiLtd includes calibration due
notices that are displayed when the
instrument is due for calibration.
For more information on the calibration
due notices, see section 2.3 below.
1.3.4 Low battery alarms
The battery in the ToxiLtd is designed to
power the instrument for a full two years
from the date of activation. In the unlikely
event that the battery runs out of power
prior to the completion of the 2-year
operational lifespan, the ToxiLtd includes
two battery warning alarms that are
activated when the battery voltage is
reduced to specific levels.
For more details on the battery alarm,
see section 2.4 below.
1.4 Design components
Case: The instrument is enclosed in a
solid PC (polycarbonate) case with TPE
(rubber) overmold.
Front face: The front face of the
instrument houses the LCD display,
MODE button, sensor port, LED and
audible alarm port.
LCD display: The liquid crystal display
(LCD) displays gas readings, messages
and other information.
Visual alarm (LED) / IrDA port: A bright
red LED (Light-Emitting Diode) alarm light
provides a visual indication of the alarm
state. The LED also functions as the IrDA
port.
MODE button: The large push-button on
the front of the instrument is called the
MODE button. The MODE button is used
to turn the ToxiLtd on and off, to view the
MAX screen and to initiate the automatic
calibration sequence.
Figure 1. Exterior front view.
Sensor port: The sensor port is located
at the upper left corner of the instrument.
A filter prevents unwanted contaminants
from entering the sensor.
Audible alarm orifice: A cylindrical
resonating chamber contains the loud
audible alarm.

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Bottom surface: The belt clip attaches to
the bottom surface of the instrument.
1.5 Standard accessories
Standard accessories with every ToxiLtd
include installed sensor and battery,
reference manual and calibration/sample
draw adapter.
1.6 Value pack kits
ToxiLtd value packs include all standard
accessories, calibration fittings, 34-liter
cylinder of calibration gas, and fixed flow
rate regulator in a foam-lined, hard-shell
carrying case.
2. Field Operation
Field operation of the ToxiLtd is controlled
entirely through the MODE button, which
is located on the front of the instrument.
The MODE button is used to turn the
ToxiLtd on and off (if desired), to access
MAX gas readings for the current session
and to initiate the fresh air/zero and span
calibration sequences.
2.1 Turning the ToxiLtd on
The ToxiLtd is effectively disabled when it
leaves the Sperian Factory. Upon arrival,
the screen will be blank other than the
negated horn icon.
Note: If the ToxiLtd arrives with three
lines showing on the screen, it is an
indication that the “must be activated
by date” has passed and the
instrument has already turned itself on.
Contact Sperian or your distributor for
further instructions.
The ToxiLtd is a disposable instrument.
Once activated, it will operate
continuously for 24 months. In the
unlikely event that the battery runs out of
power prior to the completion of the 2-year
operating cycle, the ToxiLtd must be
returned to Sperian or an authorized
service center for the installation of a new
battery.
There are no user serviceable parts
inside of the ToxiLtd.
To initialize the ToxiLtd press and hold
the MODE button for 5 seconds until the
instrument chirps, then release the MODE
button.
2.1.1 O2version start up sequence
ToxiLtd O2models require a one-hour
warm-up period prior to use. Once the
MODE button is pressed and held for 5
seconds, the instrument will begin a 60-
minute countdown. The instrument will be
ready to use in 60 minutes.

When the warm-up period concludes, the
instrument will show three dashes with
the negated horn symbol.
Once three lines are shown, press and
hold the MODE button for 1 second to
start the instrument. The start-up
sequence will begin. Proceed to section
2.1.3.
2.1.2 Toxic version start up sequence
ToxiLtd models equipped with a toxic gas
sensor do not require a warm up period.
Upon arrival, press and hold the MODE
button for 5 seconds. The ToxiLtd will
immediately proceed to the start-up
sequence.
2.1.3 Start up sequence
During the start-up sequence, the
instrument performs an electronic self test
that will take approximately 30 seconds to
complete. During the self-test sequence,
the audible alarm will “chirp” and all
sections of the display will be lit.
The ToxiLtd will then display the “on”
screen followed by software version.

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
If the sensor has become disconnected or
removed from the
instrument during
shipping, the screen
will show “F 1” with the
caution symbol
following the software
version screen.
If “F 1” is shown, the
instrument will
automatically shut
down and show three
lines on the screen.
If “F 1” is shown and the ToxiLtd shuts
itself down, contact Sperian or your local
distributor for further information.
Once the sensor is recognized, the serial
number screens will be shown. Note that
the 6 digit serial number is shown on two
screens. In this case, the instrument
serial number is 123456.

The sensor type will be shown next.
During the display of the warning alarm
level, the LED alarm
light will flash twice and
the audible warning
alarm will sound twice.
The audible warning
alarm is slow and
warbling.
During the display of
the danger alarm level,
the LED visual alarm
will flash twice and the
audible danger alarm
will sound twice. The audible danger
alarm is louder and a higher frequency
than the warning alarm.
Following the danger alarm level, the
ToxiLtd will begin standard operation and
will display the number of months
remaining in the 24-month lifecycle of the
instrument. During an alarm condition,
the instrument will display the current gas
reading.
For the first full month of use following
initialization the display
will show 23 full
months remaining.
Once the instrument
determines that there
are 90 days of
operation remaining,
the instrument will
indicate 90 days and
proceed to count the
days down until the instrument reaches 0
days and turns itself off.
2.2 Functions
As stated above, the ToxiLtd will show the
amount of time remaining in the product’s
lifecycle during normal operation unless
there is an alarm present. The ToxiLtd
will display gas readings while it is in
alarm.
2.2.1 View max gas readings
From the months remaining or the current
gas readings screen, press the MODE
button once to view the MAX gas values
screen. The MAX figure represents the
highest gas value reading that has been
recorded by the
instrument during the
current operating session
or during the last 24
hours of operation.
Note: To reset the max readings level,
fresh air/zero calibrate the instrument
as discussed in section 3.3.
The MAX screen will be shown for 5
seconds. The instrument will then
automatically return to the months or days
remaining screen (unless an alarm
condition is present).
2.2.2 View alarm levels
To view the current gas alarm levels, from
the current gas reading screen, press and
hold the MODE button for about 5
seconds until the display test screen is
shown.

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Release the MODE button. The software
will proceed through the software version
and serial number screens before
showing the alarm levels.

The instrument will then return to normal
operation and display the months
remaining screen.
2.3 Calibration due notices
When the calibration due notice is
enabled and the ToxiLtd is due for fresh
air calibration “0-CAL
will be displayed at the
bottom of the current
gas readings screen
along with the
triangular warning
symbol.
When the calibration due notice is
enabled and the ToxiLtd is due for span
calibration the calibration bottle icon will
be displayed at the
bottom of the current
gas readings screen
along with the warning
symbol.
The bump test due notice is designed for
instruments that are processed in an IQ
Express Dock. When the bump test due
notice is enabled and the ToxiLtd is due
for a bump test, the calibration bottle icon
will be displayed at the
bottom of the current
gas readings screen
without the triangular
warning symbol.
Note: If an IQ Express Dock is
unavailable, a manual span calibration
will also reset the bump test due
notice.
The default fresh air/zero calibration
interval for the O2version of the ToxiLtd is
thirty days. Different versions of software
may have different calibration intervals.
2.4 Low battery alarms
When the ToxiLtd determines that there
are less than 7 days of battery life
remaining, the battery icon will be lit.
Note that “MONTHS”
or “DAYS” and the
number of months or
days of operating life
remaining are still
shown when the
battery icon is lit.
When the ToxiLtd determines that there
are less than 8 hours of battery life
remaining, the battery icon and the
triangular warning symbol on the LCD will
be shown. At this point the audible alarm
will begin to chirp once per minute.
When the battery reaches a level where it
can no longer power the instrument, the
ToxiLtd will sound the
high/danger audible
alarm while displaying
OFF with the danger,
caution and battery
icons.
Press MODE to turn the instrument off. If
the MODE button is not pressed, the
instrument will remain in alarm for as long
as it can before shutting itself down. The
following screen will be shown after the
instrument is shut down.
In the event that the
instrument actually shuts
itself down due to low
battery levels, it will
automatically launch the
IrDA connection subroutine so that data in
the instrument may be downloaded to
BioTrak.
2.5 Turning the ToxiLtd off
To turn the ToxiLtd off, press and hold the
MODE button. After 5 seconds, the
instrument will light up all segments on
the display. After 3 more seconds, the
display will show “IrDA”. Continue to hold
the MODE button for an additional 15
seconds after “IrDA” is
shown. The following
screen will be shown
after the instrument is
shut down.
Note: Turning the ToxiLtd off will have
no effect on the operational life of the
instrument. The ToxiLtd will operate