5
1. Overview
The ToxiPro is a single sensor gas detector
that can be configured to detect either oxygen
(O
2
) 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.
Note: Early production runs of the oxygen
version of the ToxiPro were referred to as
the “OxyPro”. The instructions contained
in this manual that refer to the ToxiPro
oxygen (O
2
) are also valid for the OxyPro
with similar instrument firmware.
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 2.8 for more details on
sampling the atmosphere.
1.2 Sensors
All versions of the ToxiPro except the O
2
model use an electrochemical toxic gas
sensor. The ToxiPro O
2
uses 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
O
2
sensor ranges
The oxygen sensor used in the ToxiPro O
2
has a range of 0-30% by volume.
1.2.3 ToxiPro
O
2
warm-up phase
The ToxiPro O
2
requires 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, and
the bright red LED alarm light flashes.
Two oxygen alarm set points have been
provided for ToxiPro O
2
instruments. 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, TWA (Time Weighted
Average) (if enabled) and STEL (Short Term
Exposure Limit) (if enabled).
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 Sperian Instrumentation 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 Low battery alarms
The ToxiPro is designed with 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 2.5 below.
1.3.4 Missing sensor during startup
If the ToxiPro fails to
detect a sensor during
startup, it will show “F 1”
with the caution symbol
and then shut itself off.
For more details, see section 2.1.
1.3.5 Corrupt
memory
The ToxiPro continuously
monitors its onboard
memory. If the instrument
determines that the
memory is corrupt, it will
display “F 4” and proceed to shut itself off.
If “F 4” is displayed, contact Sperian
Instrumentation for further details.
