Specifications

MFC-CB™ Operation and Maintenance Manual
©2001~2007 DH Instruments, a Fluke Company Page 86
Table 12. Troubleshooting Checklist (Continued)
SYMPTOM PROBABLE CAUSE SOLUTION
Bottom line of display has
changed and you want to change
it back.
The DISPLAY function has been
used to change the display.
Use [DISPLAY] to set bottom line to
desired display. (3.2.4)
Bottom line of display is blank. DISPLAY mode is “clean”.
Operation is normal. Use [DISPLAY]
to change bottom line display if
desired. (3.2.4.6 and 3.2.4)
Measured value appears to be
grossly incorrect.
Your assumption of flow in the
system is grossly incorrect.
Check and adjust flow in the system.
Verify that upstream and downstream
conditions will permit the expected
level of flow to be achieved.
Set point and/or measure value
appear to be incorrect.
A K factor and/or adjustment
factor are applied but are not
being considered.
Use [K] to adjust K factor and/or
[SETUP], <5adj> to modify the
adjustment function. (3.2.1, 3.3.5)
Measure indication is negative.
The flow through the MFC or
MFM is reverse from the
direction you expected.
Check system and correct flow.
Set point and display values
have too much or not enough
resolution.
Resolution setting needs to be
changed.
Use [SETUP], <3res> to change
display resolution setting. (3.3.3)
Set point entry is causing an out
of range error even though set
point value entered is in range.
K factor and/or adjustment
factors can cause the actual set
point to be different from the
entered set point.
Consider the active K factor and/or
adjustment factors. Use [K] to adjust
K factor and/or [SETUP], <5adj> to
modify the adjustment function.
(3.2.1, 3.3.5)
Set point entry is causing the
error <MFC profile is not a
controller> to display.
Active MFC profile is for a
measuring, not a controlling
device. To enter and execute set
points the active MFC profile
must specify that the device is a
controller.
Select an MFC profile for the active
device channel that specifies a
controller. Create the MFC profile
first if necessary. (3.2.6, 3.3.1)
Would like to display set point
and measurement in a unit of
flow but none is available under
[UNIT].
The active MFC profile is default
profile #1 or #2 that does not
support a flow unit.
Use [MFC] to select a custom MFC
profile that specifies the desired flow
unit. Create the MFC profile first if
necessary. (3.2.6, 3.3.1)
Set point entries and other
settings are not having the
expected effect on operation.
Incorrect active device channel.
MFC-CB operates on two
channels (DEV1, DEV2) and
many settings and functions
affect only the active channel.
Operation is normal. Observe the
active channel indicator display to
confirm that the expected channel is
active. Check that the MFC or MFM
being controlled is connected to the
correct rear panel connection
(DEVICE 1 or DEVICE 2). (3.1.2.4,
3.2.5)
The active device channel
indicator has extra characters.
For example D1, 5 instead of D1.
An MFC Switchbox has been set
up for the device channel and
extra characters are the selected
MFC Switchbox channel.
Use [SPECIAL], <6xbox> to
deactivate the MFC Switchbox for the
active channel. (3.4.6)