700-Bubbler-Man Rev 12 13 Feb 2020
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1.5.1 4-20mA MINIMUM/MAXIMUM, DEFAULT VALUES, AND UNITS OF MEASUREMENT
The minimum and maximum default values are:
These defaults can be adjusted from the Bubbler’s front panel (section 3.6) or using SDI-12 X
Commands (section 5.2.4) to modify the analog offset and analog slope respectively.
If the units of measurement are changed, either through the Bubbler’s front panel or using SDI-12
commands, the minimum and maximum values will be automatically converted to the new unit of
measurement (e.g. the initial unit of measurement was feet with a minimum and maximum levels
of 5 and 20. Units of measurement were changed to meters. The minimum and maximum levels
will automatically be changed to 1.52 and 6.09).
1.6 SD CARD
The Bubbler has an FTS supplied internal SD card which is used for service and factory logs. This SD
card has been tested to work in the environmental conditions in which the Bubbler is designed to
operate. Replacing it with a non-FTS approved, standard SD card can cause reduced or lost data in
the service and factory logs.
The Bubbler’s SD card stores data independently from the data logger and as such, is timestamped
by the Bubbler. Transmitted data will be timestamped in accordance with the data logger’s clock.
SD card log entries will only be timestamped if the Bubbler’s date and time are set using the “Set
date and Time X-command (see section 5.2.2).
IMPORTANT! The Bubbler’s timestamp is cleared if the Bubbler has been powered off
and must be reset once power is restored.
1.7 MAINTENANCE
The Bubbler itself requires little maintenance. During site visits, inspect the Bubbler, all power and
hose fittings and periphery equipment for signs of damage and to ensure the station setup has
maintained its integrity. Inspect the colour of the desiccant in the desiccator and replace if it is
saturated. Details of the FTS supplied desiccator and desiccant are found in section 2.5. If using a
different desiccator, refer to its operating instructions. It is recommended to bring extra desiccant
on site visits. Should the Bubbler not be operating as expected, contact FTS Support for assistance
and guidance. FTS suggests Bubbler maintenance should be conducted by factory trained
personnel.
1.8 SHIPPING THE BUBBLER
Prior to shipping the Bubbler, bleed the compressor tank (Section 3.4.2) and remove the desiccant
line inlet fitting (Part # 18729). See Figure 1-1 and Section 2.5.
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