8270A/8370A
Operators Manual
54
External Abort and Isolation Valves
External abort and isolation valve accessories are available. See the separate
instruction sheet for details. The valves can be used for multiple applications
including supply pressure isolation or when configuring multiple controllers in one
system (System Mode).
System Mode
To expand the ranging capability of the Product, connect the Product to one or
two other pressure controllers that support the system stacking feature. Any
combination of 6270A, 8270A, and 8370A controllers can be used when
configuring a system. This could potentially make a single system with up to 15
pressure ranges. When connected, the Primary system remotely operates the
Auxiliary systems.
See the System Mode Application Note online for detailed information and
instructions on System Mode.
If you have a controller that will not boot to its normal screen, it is probably stuck
in Aux mode. To take a chassis out of Aux mode:
1. Turn all chassis off.
2. Disconnect the CANbus cables.
3. Turn chassis on.
4. Wait 5 minutes and the AUX chassis changes to a Primary chassis.
Maintenance
This section explains routine operator maintenance necessary to keep the
Product in optimal condition. For intensive maintenance tasks, such as
troubleshooting or repair, see the
8270A/8370A Service Manual
available on the
Fluke Calibration website The Service Manual also contains the calibration
adjustment procedures. See
Contact Fluke Calibration
for more information.
Fuse Replacement
Access the fuse from the rear panel. The fuse rating label below the fuse holder
shows the correct replacement fuse ratings for each operating voltage.
XW
Warning
To prevent possible electrical shock, fire, or personal injury:
Turn the Product off and remove the mains power cord.
Stop for two minutes to let the power assemblies discharge
before you open the fuse door.
Use only specified replacement fuses, see Table 18.
To replace the fuse, refer to Figure 15:
1. Disconnect the mains power cord.
2. With a standard screwdriver, release the fuse holder door.
3. Pull out the fuse holder.
4. If necessary, replace the fuse.
5. Reinsert the fuse holder.
6. Close the fuse holder door.