The RPM3 pressure monitor was replaced for use in most applications with the introduction of the RPM4 Reference Pressure Monitor in 2003. Notification of limited spare parts availability and repair options was communicated in 2016.
The molbox RFM flow terminal went obsolete in May 2021 and is replaced by the molbox1+ flow terminal. Limited spare parts are available.
Here are spare parts with limited availability
3137702 (102714) FEET,SET,TILT-UP
3136290 (102337) FAN,TUBEAXIAL,4.6 CFM,5V,80MA,28 DBA,5500 RPM,SQUARE,40X40X10MM,BULK
3125537 (401450) ASSY, ENCL W/FAN, RPM3
3135423 (102066) VFD,DISPLAY,40 CHAR ALPHA-NUM
3146770 (122809) OVERLAY, FRNT PNL, RPM3 (keypad) - no longer available
3146781 (122812) PNL, FRNT, RPM3 (Metal panel under overlay keypad)
Here are spare parts with no availability from Fluke
5074271 POWER SUPPLY,SW,45W,90-264VAC,5V@5A,12V@2.5A,-12V@0.5A,102X51X28MM,CHASSIS MOUNT.
This power supply is in very limited supply so is not available from Fluke. The manufacturer is Artesyn and their part number is NPT42-M. You might find very limited stock at Digi-Key, Newark, Mouser or similar electronics suppliers.
Note: If you are replacing an Artesyn power supply in a RPM3, then the below cable is needed. If you are replacing an Artesyn power supply in a molbox RFM serial number 488 and lower, the below cable is needed.
Part Number: 5074259
Description: RPM3,ASSY, CABLE, AC/DC, RFM
Below is historical information about the power supply.
View the below attached document named "power supply kit 3071562, RPM3 replacement, no longer available.pdf" and determine if your RPM3 or molbox RFM has an Ault or Artesyn power supply.
If the RPM3 or molbox RFM has an Ault power supply, the RPM3 or molbox RFM is more than 15 years old and has never had the power supply replaced. The required parts to upgrade to the current power supply are no longer available, so the power supply cannot be replaced. Replacement of the RPM3 with a RPM4 or other model is the only option. Contact your Fluke Calibration sales representative. The upgrade kit from Ault power supply was part number 3071562, with description (402117) REPLACEMENT POWER SUPPLY KIT, REPAIR RPM3.
The last power supply used in RPM3 or molbox RFM (to replace an Artesyn power supply) is this one (that is no longer available through Fluke):
Part Number: 5074271
Description: POWER SUPPLY,SW,45W,90-264VAC,5V@5A,12V@2.5A,-12V@0.5A,102X51X28MM,CHASSIS MOUNT
See this document regarding power supply replacement. It refers to the power supply replacement kit that is no longer available,
Replacement Power Supply Kit for RPM3
