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5
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5
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J
U
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A
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5.1
PRODUCT OVERVIEW
molbox RFM was designed for maintenance free operation. No maintenance is required other than:
•
Taring (zeroing) of Reference Pressure Transducers (RPTs). This function is not a separate
MAINTENANCE function, it is part of regular operation (see Section 3.4.4.1).
•
AutoZero of Reference Pressure Transducers (RPTs): Regular rezeroing of the RPTs absolute
measurement mode to a barometric reference standardusing the AutoZ function is recommended
(see Section 3.4.4.4).
•
Reference
Pressures
is recommended. See Section 5.2 for instructions on RPT calibration.
•
Ohmic Measurement System Verification. A five year verification interval is recommended. See
Section 5.3 for instructions.
•
molbloc Calibration.
recalibration cycle is recommended. Due to the costs associated with maintaining the flow standards
needed to calibrate molblocs, most users return their molblocs to a DHI Calibration Service rather
than supporting the calibrations themselves.
CalTool for molblocs software is available for facilities desiring to perform molbloc calibrations.
Contact your DHI representative for additional information if needed.
This section provides information on maintenance, adjustment and calibration procedures and
recommended overhaul procedures.
Calibration, maintenance and repair services for molbox RFM are offered by a DHI Authorized
Service Provider (See Table 34).
molbox RFM is a sophisticated measuring instrument with advanced on-board features and functions.
Before assuming that unexpected behavior is caused by a system defect or breakdown, use this
manual and other training facilities to become thoroughly familiar with molbox RFM operation.
For rapid assistance in specific situations and other troubleshooting information, see Section 6.
molbox RFM is covered by a limited one year warranty. Unauthorized service or repair during the
warranty period is undertaken at the owner's risk and may cause damage that is NOT covered under
product warranty and/or may void the product warranty.
,
,
T
E
N
A
N
C
E
T
E
N
A
N
C
E
A
A
T
M
E
N
T
S
N
T
M
E
N
T
S
N
R
A
T
I
O
N
R
A
T
I
O
N
Transducer
(RPT)
molblocs can be calibrated separately from molbox RFM.
Page 133
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION
D
D
Calibration.
An
annual
molbloc calibration is not covered in this manual.
© 1998-2007 DH Instruments, a Fluke Company
recalibration
cycle
A one year
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