5
1. Overview
The ToxiPro is a single sensor gas detector
that can be configured to detect either oxygen
(O2) or one of a variety of toxic gases. The
ToxiPro’s sensor type is shown on the front of
the instrument and is also shown on the
display during the start up sequence. The
ToxiPro includes numerous features designed
to meet specific user requirements.
1.1 Methods of sampling
The ToxiPro 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 2.9 for more details on
sampling the atmosphere.
1.2 Sensors
All versions of the ToxiPro except the O2
model use an electrochemical toxic gas
sensor. The ToxiPro 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.
A sensor cross sensitivity chart is provided in
Appendix A at the back of this manual.
1.2.1 ToxiPro sensor ranges
Specific toxic sensor ranges and resolutions
are provided in the sensor replacement chart
in Appendix B.
1.2.2 ToxiPro O2sensor ranges
The oxygen sensor used in the ToxiPro O2
has a range of 0-30% by volume.
1.2.3 ToxiPro O2warm-up phase
The ToxiPro O2requires a one-time, 15-
minute warm-up phase prior to initial
activation. See section 2.1 for further details.
1.3 Alarm and warning logic
1.3.1 Gas alarms
ToxiPro gas alarms are user-adjustable and
may be set anywhere within the range of the
specific sensor. When an alarm set point is
exceeded a loud audible alarm sounds. In the
warning state the LED’s will flash, yellow. In
the danger state the LED’s will flash, red.
Two oxygen alarm set points have been
provided for ToxiPro O2instruments. The
danger alarm is sounded for oxygen
deficiency and the warning alarm is sounded
for oxygen enrichment.
ToxiPro instruments equipped with a toxic gas
sensor have up to four alarm set points:
Warning, Danger, Custom, TWA (Time
Weighted Average) (if enabled) and STEL
(Short Term Exposure Limit) (if enabled).
The custom alarm level can be set to a level
greater than/equal to the danger alarm level
for toxic sensors and less than/equal to
danger level for oxygen sensors using the IQ
System software. The custom alarm is a
latching alarm. The custom alarm looks and
sounds similar to the DANGER alarm but,
with the warning symbol turned on and the
DANGER icon not being set. If the custom
alarm level has been reached then the alarm
can only be silenced by putting the instrument
in the dock (successful IrDA connection) or
successful connection to BioTrak. If the
custom alarm value is zero then the custom
alarm is disabled and “OFF” will appear on
the instrument’s LCD during the startup
sequence. If the danger alarm has been
disabled then the custom alarm is also
disabled.
Note: In the standard ToxiPro
configuration with toxic gas sensors, the
STEL and TWA alarms are not enabled.
The STEL and TWA alarms may be
enabled at the factory or through BioTrak
software. Call Honeywell Analytics for
more details.
1.3.2 Calibration and bump test due
notices
The ToxiPro includes bump test and
calibration due notices.
For more information on the calibration
due notices, see section 2.4 below.
1.3.3 Battery replacement Warning
If a new battery has been installed or the
existing battery was removed and replaced
the ToxiPro will show “F 0” on the display and
will beep 6 times upon startup. It will then go
into the set time/date mode.
