MAINTENANCE, CLEANING AND REPAIR 
Information for general use 
Rev. M / 73023639 
 
10.4.  Repair work and Honeywell service work 
The device has got hardly any consumables and wear parts. Honeywell recommends that the filter 
in the process inlet is checked every year to prevent errors and enable the service calibration to be 
completed with special gases. 
 
For security reasons, the service calibration in fiscal mode and some other work may 
only be carried out by the manufacturer or by personnel trained or authorized by it. 
 
Please  arrange  an  appointment  promptly.  This  is  also  an  ideal  opportunity  to  rectify  any  other 
discrepancies which occurred during the maintenance work and check the process gas inlet filter.  
The instrumentation section may only be opened by trained personnel with the appropriate device 
expertise.  
If the device is used for fiscal measurements, the presence of a fiscal verification officer or a 
representative may also be required if the instrumentation section is opened. 
 
In any case, the following always applies: 
 
DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE IS PRESENT 
DISCONNECT POWER BEFORE OPENING 
N’OUVREZ PAS L’APPAREIL DANS UNE ATMOSPHÈRE EXPLOSIBLE 
DÉCONNECTEZ LA TENSION AVANT L’OUVERTURE 
Please contact Honeywell if the device suffers any damage or to arrange an 
appointment for a service visit. The Contact data details are provided at the start 
of this document. 
Spare and replacement parts for work which you can carry out yourself can also be 
ordered from this contact. 
 
The process gas inlet is fitted with a filter to protect the interior of the device from dirt. The filter 
is neither visible nor accessible during normal operation. This filter may block and must then be 
replaced if gas which does not meet the specifications is supplied or the upstream filter system 
fails.  
 
Example: The message “Process gas pressure alert”, although the requirements from chapter 
11 have been satisfied, indicates a possible blockage. In this case, contact Honeywell to conduct 
further tests or exclude other causes.