Heinrichs Messtechnik GmbH
Page 10 of 118
OPERATING MANUAL TMU-W / UMC4
2.5
Returning your flowmeter for servicing or calibration
Before sending your flowmeter back to us, for servicing or calibration, make sure it is completely clean.
Any residues of substances that could be hazardous to the environment or human health are to be
removed from all crevices, recesses, gaskets, and cavities of the housing before the device is shipped.
Warning
The operator is liable for any loss or damage of any kind, including personal injury,
decontamination measures, removal operations and the like that are attributable to
inadequate cleaning of the device.
Any device sent in for servicing is to be accompanied by a declaration of
Decontamination, a template of which is provided in section 8.3.1.
When returned, the device is to be accompanied by a document describing the problems encountered.
Please include in this document the name of a contact person whom our technical service department
can contact to enable us to repair your device as expeditiously as possible and minimize the repair costs.
2.6
Replacement of the transmitter electronics
Before replacing the transmitter electronics, read the safety instructions in Section 2.4, “Installation and
servicing” on page 9.
The data memory chip (DAB) with the calibrating data of the sensor is an integral component of the
control unit (display BE4). Removal and installation of the control unit is described in chapter 4.6, “DSB
data memory module” on page 25.
Should an exchange of the transmitter electronics become necessary, it is essential that the whole
electronic stack is replaced. This comprises of all circuit boards in the electronic compartment and in the
terminal compartment. The overall accuracy of the measurement up to the analogous outputs can only
be guaranteed when all circuit boards are replaced. Only the control unit with the integrated memory for
the calibrating data of the sensor shall remain with the device.
Caution
The complete stack is to be replaced with all of its printed circuit boards (with the
exception for the display unit containing the memory module). This is particularly
important for the explosion-proof transmitter. The specified precision of the
electronics is only guaranteed if the complete stack is replaced.