Bronkhorst®
Instruction Manual EL-FLOW® Prestige
9.17.084N
14
2.8
Micro switch operation
Using the two colored LEDs and the micro switch on the
EL-FLOW® Prestige
, several
actions can be monitored and started. The green LED is used for status indication. The
red LED is used for errors, warnings and messages. The switch can be used to start
several actions, such as auto-zero, restoring factory settings and bus initialization
actions, if applicable.
·
See section
for background information about and
instructions for zeroing.
·
See section
for a comprehensive description of the micro
switch functionality.
The micro switch on top of the
EL-FLOW® Prestige
can be operated with a thin, metal or hard plastic pin, e.g.the end of a
paperclip.
2.9
Powering up and powering down
·
It is recommended to turn on power before applying fluid pressure and to switch off power only after relieving fluid
pressure.
·
For best performance, allow the device to warm up and stabilize for at least 30 minutes before starting measurement
and/or control. This may be done with or without media flow.
When applying pressure, avoid pressure shocks and bring the fluid system gradually up to the level of the specified
operating conditions; open the fluid supply gently.
2.10
First use
In systems for use with corrosive or reactive media, purging for at least 30 minutes with a dry, inert gas (like Nitrogen or
Argon) is absolutely necessary before use. After use with corrosive, reactive or hazardous media (e.g. toxic or flammable),
purging is also necessary before the fluid system is exposed to air.
The very first time the instrument is used, adjusting the zero point is recommended. See
background information and instructions.
2.11
Calibration
The EL-FLOW® Prestige is factory calibrated. Periodical inspection, recalibration or verification of the accuracy may be subject
to individual requirements of the end user.
Bronkhorst certifies that the instrument meets the rated accuracy. Calibration has been performed using measurement
standards traceable to the Dutch Metrology Institute (VSL).
Note that the calibration only applies to the primary measurement/control function of the instrument; secondary outputs
(like temperature and pressure) are outside the calibration scope.
2.12
Maintenance
The EL-FLOW® Prestige needs no regular maintenance if operated properly, with clean media, compatible with the wetted
materials, avoiding pressure and thermal shocks and vibrations. Units may be purged with a clean, dry and inert gas.
In case of severe contamination, cleaning the inside of the device may be required. After cleaning, recalibration of the
instrument is recommended.
Inexpertly servicing instruments can lead to serious personal injury and/or damage to the instrument or the system it is
used in. Servicing must therefore be performed by trained and qualified personnel. Contact your Bronkhorst representative
for information about cleaning and calibration. Bronkhorst has a trained staff available.
