3
Warnings and Cautionary Statements
Read and understand this Product Manual before operating or servicing the instrument. Failure to perform
certain procedures or note certain conditions—provided below and throughout the manual—may impair the
performance of the product, cause unsafe conditions, or both.
Table 1.3 Warnings and cautionary statements
If it appears that the instrument is not working correctly, immediately contact Industrial Scientific.
Only qualified personnel should operate, maintain, and service the instrument.
Substitution of components may impair intrinsic safety, which may cause an unsafe condition.
Substituer des composants peut compromettre la sécurité intrinsèque, ce qui peut résulter en une situation
dangereuse.
Do not use in oxygen-enriched atmospheres. If the atmosphere becomes oxygen enriched, it may cause
inaccurate readings.
Oxygen-deficient atmospheres may cause inaccurate readings.
A rapid increase in a gas reading that is followed by a declining or erratic reading may indicate an over-range
condition, which may be hazardous.
Sudden changes in atmospheric pressure may cause temporary fluctuations in gas readings.
Temperatures below -20 °C (-4 °F) are likely to cause decreased functionality in the instrument's display screen
and man-down feature.
Sudden changes in ambient-air temperature will cause a form of sensor drift in the Carbon Monoxide/Hydrogen
Sulfide (CO/H
2
S) sensor (part number 17155306-J) that will produce temporary variations in the sensor's
readings:
If the temperature suddenly
increases
, the CO reading will temporarily decrease and the H
2
S reading may
temporarily increase.
If the temperature suddenly
decreases
, the CO reading will temporarily increase and the H
2
S reading may
temporarily decrease.
The readings will stabilize when the sensor has acclimated to the change in temperature. For example, if the
ambient-air temperatures changes from a "room temperature" of 20 °C (68 °F) to an outdoor temperature of 0
°C (32 °F), the stabilization time is approximately 15 minutes; with smaller or larger changes in temperature,
stabilization time will be shorter or longer, respectively.
Note:
If the sensor is to be zeroed after a sudden change in ambient-air temperature, allow the sensor and its
readings to stabilize before zeroing.
The Long-life O2 sensor (part number 17155304-Y) is a biased sensor, requiring continuous power to operate to
specification. Continuous power is provided by a charged battery, regardless if the instrument is powered on. If
no power is provided to the sensor, it will experience sensor drift and generate erroneous readings.
If an instrument containing this sensor experiences a state of no charge, sensor drift will likely occur. If so,
Industrial Scientific recommends that the instrument be installed on a compatible charger or docking station. If
installed on a docking station, the instrument may fail calibration, but can remain docked to charge.
After
charging
*
, undock the instrument; then, redock the instrument or zero it manually. If the instrument does not
pass zero, repeat the zero.
*If the sensor has been in a no-power state for seven days, it may require a charge period of up to three hours. Charge time
will vary based on how long the sensor has been in a no-charge state.