Endress+Hauser Thermal Mass Flowmeter Proline t-mass 65

Warning: This procedure requires trained personnel!

Stable pressure and temperature?

This function can only be activated with a special Endress+Hauser service code.

Sign off on the in-situ calibration

Under normal circumstances, fluid wetted seals of the sensor do not require replacement.

Replacement is necessary only in special circumstances, for example if aggressive or corrosive fluids are incompatible with the seal material.

Only Endress+Hauser seals may be used.

The sensor contains o-rings seals and a bushing. In case of failure, the device must be returned to an Endress+ Hauser sales center for inspection and repair (→ 6).

The transducer is welded to the insertion tube and has no exchangeable seals. The compression fitting contains wetted seals (ferrules) and a bonded seal is used on the G 1 A thread version.

When cleaning the exterior of measuring devices, always use cleaning agents that do not attack the surface of the housing and the seals.

The sensor is capable of withstanding clean in place (CIP) processes using heated liquids or steam (SIP), within the maximum specified temperature limits. However the sensor measurement will be adversely affected during the cleaning cycle and a settling down period will be required after the cycle to allow the process and sensor temperatures to re-stabilize.

The POSITIVE ZERO RETURN function maybe activated to set the current output to zero flow during such cycles. See "Description of Device Functions" manual for more information.

Do not use a pipe cleaning pig.

Warning: This procedure requires trained personnel!

Is the gas clean (i.e. does not contain particulates)?

If the gas is not clean, proceed with gentle cleaning of the sensor elements.

Select the nature of the application

If the measurement is critical, perform recalibration checks once per year for a period of 2 years.

If the application gas is not clean and dry, increase the recalibration checks to twice per year.

For non-critical applications and or where the gas is clean and dry, a recalibration interval of every 2 to 3 years is recommended.

Enter the current flowmeter reading

Sign off on the flowmeter recalibration