Sierra InnovaMass 240i Series, Instruction Manual, Page: 5 / 115

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power connections must be in accordance with published CE directives. All wiring
procedures must be performed with the power off.

Before attempting any flow meter repair, verify that the line is not pressurized. Always
remove main power before disassembling any part of the mass flow meter.

When using toxic or corrosive gases, purge the line with inert gas for a minimum of four
hours at full gas flow before installing the flow meter.
Caution!

Calibration must be performed by qualified personnel. Sierra strongly recommends that
you return your flow meter to the factory for calibration.

In order to achieve accurate and repeatable performance, the flow meter must be installed
with the specified minimum length of straight pipe upstream and downstream of the flow
meter’s sensor head.

For insertion flow meter installations, the sensor alignment pointer must point
downstream in the direction of flow.

The AC wire insulation temperature rating must meet or exceed 85°C (185°F)
Receipt of System Components
When receiving a Sierra mass flow meter, carefully check the outside packing carton for
damage incurred in shipment. If the carton is damaged, notify the local carrier and
submit a report to the factory or distributor. Remove the packing slip and check that all
ordered components are present. Make sure any spare parts or accessories are not
discarded with the packing material. Do not return any equipment to
the factory
without first contacting Sierra Customer Service
.
Technical Assistance
If you encounter a problem with your flow meter, review the configuration
information for each step of the installation, operation, and
setup procedures.
Verify that your settings and adjustments are consistent with factory
recommendations.
Installation and troubleshooting information can be found in the
Chapter 2 (Installation) and Chapter 4 (Troubleshooting) of this manual.
If the problem persists after following the troubleshooting procedures outlined in
Chapter 4 of this manual, contact Sierra Instruments by fax or by e-mail (see inside
front cover). For urgent phone support you may call (800) 866-0200 or (831) 373-0200
between 8:00 a.m. and 5:00 p.m. PST. In Europe, contact Sierra Instruments Europe at
+31 72 5071400. In the Asia-Pacific region, contact Sierra Instruments Asia at +8621
5879 8521. When contacting Technical Support, make sure to include this
information: