Operational Safety Concerns
ULTIMA X5000 Gas Monitor Safety Manual 7
US
3. Operational Safety Concerns
For additional operational information refer to the product instruction manual (P/N 10177361).
3.1. Calibration
The ULTIMA X5000 allows the user a method for sensor calibration. This typically includes a zero and span
operation with target gas. Refer to the instruction manual for full details on calibration methodology for each
sensor type.
The frequency of calibration gas testing depends on the operating time, chemical exposure and type of
sensor. Especially in new installations or applications, it is recommended that the first sensors be calibrated
more often to establish the sensor performance in this particular environment. For the purposes of
compliance to IEC 61508 a proof test interval is required and is shown in this manual under the section titled
“Certifications and Failure Rate Data”.
3.2. Changing or Replacing Sensors
SafeSwap
The ULTIMA X5000 comes with patented SafeSwap technology, which allows users to change or replace
XCell sensors without needing to power down the instrument. For non-XIR Plus sensors, the main
transmitter unit will accept different sensor modules. When a sensor is changed in the field, the main
transmitter unit will communicate with the sensor module and identify its target gas type and calibration
information. The gas type will show on the main transmitter display. When replacing a sensor, verify that the
correct sensor has been installed by viewing the gas type shown on the instrument display. In addition, it is
recommended that proper installation be verified by applying the gas of interest to the sensor to ensure a
proper response.
Refer to the associated product manual (P/N 10177361) for warnings and instructions for changing or
replacing sensors under power.
Swap Delay
For added convenience, all sensors with SafeSwap also have a Swap Delay which is enabled by default and
may be disabled by the user. This feature gives users a 2 minute window to change sensors without
triggering a fault condition. Once a sensor is disconnected from the transmitter, the user will have 2 minutes
to reconnect a sensor. During this time, the device analog output will go to its Maintenance level. If a sensor
is reconnected or replaced during the 2 minute window, the new sensor’s countdown sequence will begin
and the analog output will remain at the Maintenance level. After the sensor countdown is complete, the
analog output will return to reporting a live gas reading. If a sensor is not reconnected after the 2 minute
window, the ULTIMA X5000 will enter a “Sensor Missing” fault condition.
3.3. System Faults
The ULTIMA X5000 monitors itself for many conditions and will report abnormalities to the user. Refer to
Appendix A for a list of potential faults and troubleshooting recommendations.
3.4. Minimizing Undetected Faults
The ULTIMA X5000 was designed with a very high level of reliability and fault detection; however the
possibility of an undetected fault still exists. Should an undetected fault occur, there is a chance that a
potentially dangerous gas reading will not be registered.
While the chance of an undetected fault cannot be completely eliminated, certain steps can be taken to
minimize the probability. Regular maintenance is crucial to proper operation of the equipment. Frequent gas
application is also an excellent means of insuring proper operation of the equipment.
Refer to the instruction manual for full details. Adherence to the proper installation, maintenance, calibration
and operation will minimize the probability of undetected faults.
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