78
Table 6.3 Failures and errors
50% check for the following possible causes for
the failure.
Ensure the calibration cup is compatible
with the instrument and is correctly and
securely placed on the instrument.
Check the tubing for splits, blockages, or
damage.
Ensure the tubing is secured to the
calibration cup and the cylinder's regulator.
Ensure the cylinder is not empty and
contains the required gas concentrations.
If desired, repeat the calibration process.
!
and gas reading
A sensor that was operating
in DualSense has failed.
The remaining sensor is operating as a single
sensor. Respond according to company safety
policy.
When a failure is caused by conditions other than those listed above, an error code will display. Some
indicate a possible installation error or compatibility issue; qualified personnel may attempt to resolve these
and other errors (see Table 6.4 below). For all other error codes, contact Industrial Scientific for assistance.
Table 6.4 Critical errors
The display screen reproduction shown here (left) is an example of a critical error. The instrument is
put into a state of failure until the error is resolved. The 408 code indicates a specific issue; different
codes are used to indicate various failures.
Error code
Cause
Possible resolution
406
A sensor is installed in the
wrong location.
Check the sensor type and install it in its correct
location.
408
No sensors are installed or
the installed sensors are not
detected by the instrument.
Check the installed sensor for proper installation,
correct
location, and compatibility.
490
A sensor may have become
disconnected from the circuit
board.
Check for a loose or dislodged sensor, and for
damage to the sensor pins and their board
receptors.
470
An incompatible battery is
installed.
Check the installed battery’s part number for
compatibility; install a compatible battery if needed.