Instruction manual

concentration of vapors. In general, combustible gases with

flash points above 100

F do not give off enough vapors, at

ambient temperatures, to be detected.

• When using a sampling pump and sample lines, the user must

wait the appropriate time for gas to be drawn through the

sample system to the sensors. Typical transport times are a

maximum of 0.3 seconds per foot of sample line.

• When sampling over liquids, the end of the sampling line must

not touch the surface of the liquid. Otherwise, liquids may enter

the instrument, block sample gas from entering the line, and

cause a false reading to occur. In addition, internal damage to

the instrument may result.

• Obstruction of the sensor holes in the instrument case causes

erroneous readings. These holes must be kept open at all

times. Do not use compressed air to clean the sensor holes;

excessive pressure at the face of the sensors could damage

them.

• Do not use MSA Lead Inhibitor Filters with this instrument. Loss

of sensitivity can result.

• Battery packs must be recharged in a non-hazardous location

free of combustible gases and vapors.

• A calibration check must be performed before each day’s use to

verify that the instrument is operating properly and readings are

accurate (or more frequently if the instrument is subjected to

significant physical shock or high levels of contaminants). If the

readings are not within the specified limits, the instrument must

be recalibrated before use. If no calibration check is performed,

inaccuracies in gas readings may not be detected. See the

FiveStar Alarm Technical Manual, Chapter 2, for calibration

check procedure.

• Use only genuine MSA replacement parts when performing any

maintenance procedures described in this manual. Substitution

of components can seriously impair instrument performance,

alter intrinsic safety characteristics, or void agency approvals.

• Repair or alteration of the FiveStar Alarm beyond procedures in

this manual or by anyone other than a person authorized by

MSA could cause the instrument to fail to perform properly.

FAILURE TO FOLLOW THE ABOVE WARNINGS CAN RESULT

IN SERIOUS PERSONAL INJURY OR DEATH.

Instruction Manual Chapter 1, Safety and General Limitations

FiveStar Alarm 1-3