7
R
EPLACEMENT
P
ARTS
748221-L Rosemount Analytical December 2000
37
Model 7D Thermal Conductivity Analyzer
The following parts are recommended for routine maintenance and troubleshooting of
the Model 7D. If the troubleshooting procedures do not resolve the problem, contact
your local Rosemount Analytical service office. A listing of Rosemount Analytical
Service Centers is located in the back of this manual.
Figures 7-1, 7-2, and 7-3 show locations of components and assemblies.
7.1 CIRCUIT BOARD REPLACEMENT POLICY
In most situations involving a malfunction of a circuit board, it is more practical to
replace the board than to attempt isolation and replacement of the individual
component, as the cost of test and replacement will exceed the cost of a rebuilt
assembly. As standard policy, rebuilt boards are available on an exchange basis.
Because of the exchange policy covering circuit boards, the following list does not
include individual electronic components. If circumstances necessitate replacement of
an individual component, which can be identified by inspection or from the schematic
diagrams, obtain the replacement component from a local source of supply.
7.2 REPLACEMENT PARTS
7.2.1 S
ELECTED
R
EPLACEMENT
P
ARTS
652270
3,4
Temperature Control Assembly
Section 7.2.2
654648
3,4
Alarm Kit
Section 7.2.3
654892
3,4
Range Switch Kit
Section 7.2.4
613560
Bridge Power Supply
Figure 7-2
619714
±
15V Power Supply
Figure 7-2
654632
3
Detector Assembly w/Filaments -
Flowing Ref (Gold Sheathed Tungsten)
Figure 5-1
654630
3
Detector Assembly w/Filaments -
Flowing Ref (Hytempco)
Figure 5-1
654628
3
Detector Assembly w/Filaments -
Flowing Ref (Tungsten)
Figure 5-1
3
Parts are selected or are optional depending on instrument application. Refer to Application Data Sheet and ordering
information to determine which parts are applicable to your instrument.
4
Refer to section listed for replacement parts of assembly.
