Protégé Portable Gas Monitor
Instruction Manual
31 of 61
P/N 087-0038 Rev. J 02/10
4.3. Protégé Calibration and Bump Test
WARNING
OPERATING A PROTÉGÉ MONITOR THAT HAS EXCEEDED ITS CALIBRATION DATE CAN CAUSE FALSE READINGS OF
DETECTED GASES. READINGS OBTAINED WHILE UNIT IS OUT OF CALIBRATION ARE INVALID AND COULD LEAD TO
DEATH OR INJURY.
CAUTION
IF CAL EXPIRED IS DISPLAYED UPON POWER ON START UP SEQUENCE INDICATING THE UNIT DOES NOT HAVE
VALID CURRENT CALIBRATION, PRESS THE RIGHT OPERATIONAL BUTTON TO OVERRIDE AND IMMEDIATELY
CALIBRATE THE MONITOR. FAILURE TO DO COULD RESULT IN INACCURATE MONITORING BY THE UNIT SENOSRS.
Scott Health & Safety recognizes the potential of the Protégé as a life saving device when operated
and maintained correctly. As such, verifying proper operation of the Protégé in the form of Span
calibration and daily Bump Testing is essential to ensure the Protégé performs as intended in a
potentially hazardous environment.
The frequency at which Span calibration and Bump Testing occur is best determined based on local
regulatory standards, company policies, and industry best practices. Scott Health & Safety is not
responsible for setting policies or practices.
Calibration of the Protégé occurs in two stages. Zero calibration is performed to establish baseline
readings of atmospheres that are known to be free of toxic or combustible gases. Span calibration is
performed to ensure the monitor detects target gases within specified operating parameters.
Span calibration is the adjustment of the Protégé’s response to match a known concentration of gas.
Sensors can lose sensitivity through normal degradation, exposure to high gas concentrations, or
sensor poisoning. Accurate calibration can be achieved only if specific concentrations of the correct
gases are used. Span calibration should be performed when a new sensor is installed or when the
Protégé displays CAL EXPIRED. Span calibration must be performed anytime a daily Bump Test
fails.
Bump Testing verifies the Span calibration by subjecting the Protégé to a known exposure of gas,
verifying the response is within 10% of actual concentration and verifies that all alarms work
properly. Scott Health & Safety recommends a daily Bump Test be performed prior to each day’s
use and whenever the sensor has been exposed to a high gas concentration, submerged in water,
or exposed to mechanical shock such as being dropped.
Scott Health & Safety recommends a daily Zero calibration be performed prior to each day’s use
and when the monitor displays a reading other than its baseline reading in an atmosphere known to
be free of any toxic or combustible gases. When an atmosphere is not known to be free of toxic or
combustible gases, a Zero Air calibration cylinder may be used.
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