Bronkhorst®
Instruction Manual ES-FLOW™ 1xxC
9.17.153A
36
7
Maintenance
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.
·
Before disconnecting or disassembling any fluid system related parts, always make sure the fluid system is depressurized.
·
When depressurizing, prevent sudden pressure changes by shutting off the fluid supply gradually.
In order to prevent clogging and maintain functionality and the specified performance, flushing or purging the fluid
system with an appropriate (cleaning) fluid is advised at the following occasions:
·
before changing fluid types
·
before and after using corrosive, reactive or flammable media
·
before and after prolonged shutdown periods*
·
every 3 months
In the event of serious contamination, flushing the fluid system may even be necessary to restore the specified system
performance.
*) As a rule of thumb a period of a few days to a week can be assumed. In practice, the length of this period strongly
depends on the properties of the processed medium and the ambient and process conditions. With some media, leaving
the installation unused for longer periods of time without flushing will be no problem, while other fluids will already cause
trouble after a very short time of inactivity.
Always use a non-aggressive, non-corrosive cleaning liquid or a dry, inert gas (like Nitrogen or Argon) to flush or purge the
fluid system.
Although the ES-FLOW™ has been tested thoroughly at the factory for leaks in the fluid system, environmental influences
(such as excessive vibrations and temperature and humidity fluctuations) can cause wear to tubing, piping and fluid
connections over time.
Frequent inspection of all fluid lines and connections before, during and after operation is essential, to ensure and maintain
a safe working environment. If necessary, re-tighten fluid connections.
7.1
Cleaning
When the measuring tube gets clogged by highly viscous and/or sticky liquids, it can be cleaned manually, using a thin
channel cleaning brush before flushing it with a cleaning liquid.
The end user is responsible for validation of the cleaning procedure and results.
7.2
Calibration
The ES-FLOW™ has been 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).
