Hach-Lange REFO 3_REFO 3D - Manual (Page 17)

Operating Instructions REFO 3 / REFO 3-D
16
D Technical Information
D1 Service
Even a product such as the Dr. Lange REFO 3 will benefit from occasional care and
attention.
The outer casing can be cleaned using a dry cloth or mild household cleaner. Sol-
vents such as benzine, acetone or similar substances must NOT be used. For
maintenance of the calibration standard refer to chapter D.5.
Cleaning of the optical parts should be carried out be our customer service. Further
serviceing need not be carried out.
D2 Error Messages
If your REFO-display shows one of these error messages please find out whether an
operator’s error has happened and repeat the measurement as described in the ope-
rating instructions.
If the same error message appears again, contact Dr. Lange service department im-
mediately and state the error message.
Error messages:
M>Ref cause:
remedy: signal high (e.g. too glossy)
calibrate REFO 3-D to metal standard
ST20
St60
ST85 cause:
remedy: bad standard values
check calibration values with program P9 and inform service
department, if required.
Lo.Ba cause:
remedy: batteries run-down
charge batteries or connect power pack
D3 Service and Addresses
For further information please contact your local service agent or one of the Dr. Lan-
ge branches:
Dr. Bruno Lange GmbH & Co. KG, Willstätterstraße 11
40549 Düsseldorf Tel.: (0211)5288136 Fax: (0211)5288106
Dr. Bruno Lange AG Zürcherstraße 35 CH-8604 Hegnau
Tel.: (01) 9456610 Fax: (01) 9456676
Dr. Bruno Lange Ges.m.b.H. Mühlweg 87a A-3101 St. Pölten
Tel.: (02742) 368540 Fax: (02742) 366448