Biosystems MultiPro Reference Manual - page 9
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that the instrument is powered up and
running. Once enabled the MultiPro will emit
a short audible beep and give a short flash
on the LED at a user-defined interval. The
security beep/flash function may be enabled
and the interval may be changed with
BioTrak software or directly with the MODE
button (see Chapter 6 for direct programming
instructions).
1.4.6 Latching peak alarms
The MultiPro’s alarms are self-resetting
unless the alarm latch is enabled. With the
MultiPro’s alarm latch enabled, the audible
and visible alarms will continue to sound after
the atmospheric hazard has cleared. To
reset the alarms, simply press the MODE
button. If the alarm latch is disabled and the
alarm condition is no longer present, the
instrument automatically returns to normal
operation, and the visible and audible alarms
cease without further input from the user.
1.4.7 Fault detection
MultiPro software includes a number of
additional alarms designed to ensure the
proper operation of the instrument. When
the MultiPro detects that an electronic fault or
failure condition has occurred, the proper
audible and visible alarms are activated and
an explanatory message or message code is
displayed.
The MultiPro is
designed to detect potentially life
threatening atmospheric conditions. Any
alarm condition should be taken
seriously. The safest course of action is
to immediately leave the affected area,
and return only after further testing
determines that the area is once again
safe for entry.
1.5
Other electronic safeguards
Several automatic programs prevent
tampering and misuse of the MultiPro by
unauthorized persons. Each time the
detector is turned on, the MultiPro
automatically tests the LED alarm light,
audible alarm, internal memory and pump
status (if so equipped). The battery is
monitored continuously for proper voltage.
The MultiPro also monitors the connection of
sensors that are currently installed. The
detection of any electronic faults causes the
activation of the audible and visible alarms
and causes the display of the appropriate
explanatory message.
1.5.1 Heartbeat
At the center of the display is a heart symbol
that will blink every few seconds to show that
the instrument is functioning normally.
1.6 Sensors
The MultiPro can be configured to
simultaneously monitor oxygen, carbon
monoxide, hydrogen sulfide and combustible
gases and vapors. The sensor configuration
of the MultiPro may be specified at the time
of purchase, or changed in the field by
appropriately trained personnel.
Note: A CF Value must be entered into
the instrument when replacing the 54-49-
24 CO/H2S sensor. Instructions are
included with the replacement sensor.
Replacement sensor part numbers and
sensor ranges are given in Appendix B.
Sensor cross-sensitivity figures are given
in Appendix C.
A sensor that cannot be
calibrated or is found to be out of
tolerance must be replaced immediately.
An instrument that fails calibration may
not be used until testing with known
concentration test gas determines that
accuracy has been restored, and the
instrument is once again fit for use.
Calibration procedures are discussed in
detail in Chapter 4.
1.7
Optional sample draw pump
A motorized sample-draw pump is available
for the MultiPro for situations requiring
continuous "hands free" remote monitoring.
Use only Biosystems
part number 54-49-102 sample draw pump
with the UL/CSA-approved version of the
MultiPro. Use only Biosystems part
number 54-49-102-5 sample draw pump
with the ATEX-approved version of the
MultiPro.
The pump contains a
pressure sensor that
detects restrictions in
airflow caused by water
or other obstructions
being drawn into the
unit and immediately
acts to turn the pump
off in order to protect
the sensors, pump, and
other MultiPro components from damage.
Pump status is continuously monitored by the
MultiPro microprocessor. When the pump is