Reloading Molbloc Eeprom File; Overhaul - Fluke MOLBOX RFM Operation And Maintenance Manual

molbox™ RFM™ OPERATION AND MAINTENANCE MANUAL
The DHI flash software loading utility and molbox RFM embedded software are available for download
from the "SOFTWARE" section of DHI's worldwide web site at www.dhinstruments.com.
5.5

RELOADING molbloc EEPROM FILE

molbloc EEPROMs are programmed with:
•
A molbloc identifying header with range identifier, S/N and calibration date.
•
molbloc specific flow calibration coefficients for N2, and other gases if entered.
• The resistance at 0 °C of the molbloc PRTs.
If the molbloc EEPROM information becomes corrupted, molbox RFM will be unable to read the molbloc
EEPROM and will display <NO BLOC> when attempting to initialize the molbloc.
DHI maintains files of the "as shipped" EEPROM contents of every molbloc delivered.
EEPROM loading tool may be downloaded from the DHI worldwide web site (www.dhinstruments.com)
and specific molbloc files can be obtained by email. If you believe you have a molbloc with a corrupted
EEPROM, contact your DHI Authorized Service Provider for additional information on the molbloc
EEPROM loading tool and obtaining molbloc data files.
5.6

OVERHAUL

If calibration of the Reference Pressure Transducers (RPTs) is included as part of the overhaul
procedure, the calibration procedure should be performed last as other overhaul procedures may
affect RPT calibration.
Any or all of the following items may be included as part of a system maintenance overhaul:
•
Clean front panel.
•
Check that top cover mounted cooling fan operates when molbox RFM is powered.
To open the molbox RFM case, remove the pop-off screw covers on the top of the case. Then remove
the four case screws. Lift OFF the cover taking care NOT to damage the electrical leads that connect
the molbox RFM main board to the cover mounted cooling fan. Disconnect the cooling fan at the main
board terminal to completely remove the cover. Reconnect when reassembling.
•
Disassemble valving assembly and clean valve components.
•
Check that internal screws, bolts and nuts are tight.
•
Perform molbox leak check (see Section 3.4.4.3.1) and verify operation by connecting a molbloc (see
Section 2.3.3).
•
Perform calibration of RPTs, if necessary (see Section 5.2).
•
Verify ohmic measurement circuit, if necessary (see Section 5.3).
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A molbloc