Sierra InnovaMass 240i Series, Instruction Manual, Page: 23 / 115

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Insertion Procedure for Flow Meters (Packing Gland Connection)
1. Calculate the required sensor probe insertion length.
2. Fully retract the stem until the sensor head is touching the bottom of the stem housing.
Remove the two top stem clamp nuts and loosen two stem clamp bolts. Slide the stem
clamp away to expose the packing gland nuts. Loosen the two packing gland nuts.
3. Align the sensor head using the sensor alignment pointer. Adjust the alignment
pointer parallel to the pipe and pointing downstream.
4. Insert the sensor head into the pipe until insertion length, I, is achieved. Do not force
the stem into the pipe.
5. Tighten the packing gland nuts to stop leakage around the stem. Do not torque over
20 ft-lbs.
6. Slide the stem clamp back into position. Torque stem clamp bolts to 15 ft-lbs.
Replace the stem clamp nuts and torque to 10-15 ft-lbs.
Wiring Connections-Protection of Your Meter
To protect your investment and be certain of a long reliable service life, we have compiled some
guidelines (from experience) that will aid your installation team in properly protecting the
electronics from the application environment. These instruments have been designed for and
proven reliable in some of the most extreme process conditions in industry: Mining, Oil and Gas,
Water, Wastewater etc. The key however is to follow best practices to insure a proper seal to
protect the internal components of this precision instrument.
Failure to adhere to these guidelines may result in water damage that is
not covered under Sierra’s
Warranty Policy .
Water penetration can lead to a damaged flow meter. Sierra’s "E" HALE ex-proof enclosures are
rated to a NEMA4X, IP66 rating. This provides protection against, rain, sleet, snow and
splashing water, but water can damage the sensor, electronics or wiring terminals if the meter is
not properly installed and maintained.
The line pressure must be less than 50 psig for installation.
The sensor alignment pointer must point downstream, in the direction of
the flow.