User's Manual
26 || G7 EXO TECHNICAL USER MANUAL
9 GAS INLETS
9.1 MANUAL CALIBRATION INLET
The manual calibration inlet allows you to apply gas to EXO’s sensors
during bump test and calibration processes.
Fixed ow regulator
A gas cylinder with a xed ow regulator is required to use the manual
calibration inlet. This inlet relies on the gas pressure in the attached
cylinder to bring the gas to the sensors.
Calibration cap
EXO does not need a calibration cap. The manual calibration inlet
ensures the applied gas is fed directly to EXO’s sensors.
Attach tubing
The manual calibration inlet is tted with a quick connect coupling
nozzle. Attaching tubing to this inlet requires the tubing to have the
corresponding quick connect coupling insert.
9.2 PUMP INLETS
The pump inlets also allow one EXO to monitor multiple remote
areas using air hoses. These inlets can be configured on EXO or on
Blackline Safety.
Attach tubing
Each pump inlet is tted with a quick connect nozzle. Attaching tubing
to these inlets require the tubing to have a corresponding quick
connect coupling insert.
8.3 CARTRIDGE CARE
Sensor contaminants
Gas sensors are susceptible to contamination by a variety of common
chemicals, reducing or eliminating their eectiveness. Care should be
taken when using silicones, cleaners, solvents and lubricants in close
proximity to sensors as exposure may cause permanent damage to
the sensor. If a device is exposed to a new chemical or compound, it is
best practice to bump test and calibrate units to ensure proper sensor
function is maintained.
8.4 SENSORS IN COLD WEATHER
EXO is rated to operate down to -20°C (-4°F). EXO will function in
temperatures colder than this for short periods of time, but Blackline
does not recommend letting the device’s internal temperature drop
below -20°C (-4°F).
Electrolyte sensors
At temperatures below -20°C (-4°F), the sensor electrolyte inside CO, HS
and other electrochemical sensors can freeze over time, reducing the
ability of the sensor to give a meaningful output. Storing EXO in a warm
and humid (60% relative humidity) environment when not in use will
help keep electrochemical sensors running longer.
Shocking an electrochemical sensor from room temperature to extreme
cold and vice versa can also cause temporary drifts in sensor readings.
These readings typically resolve in less than 60 seconds.
Infrared (IR) LEL sensors
Sudden temperature and humidity changes may cause condensation
within the LEL-IR sensor, which can aect its optics and trigger a
temporary baseline drift. Typically, they last less than 60 seconds, after
which point the readings will recover and EXO will function as normal.
Shocking the IR sensor from room temperature to an extremely cold
environment can cause a temporary baseline drift, typically less than
10% LEL. If this drift persists you can manually zero the sensor in the
cold environment.
Shocking the IR sensor from an extremely cold environment to
room temperature can cause a temporary baseline drift, sometimes
reaching overlimit.
Manual calibration inlet
Pump inlets