Chapter 13 Routine maintenance and fault-finding

Page 13.2
Is the
transmitter
receiving power
from the
795x
?
Is
the 795x
configured
correctly
?
Is the
transmitter
sending current
to the 795x
?
Has it
ever been
displayed
?
YES
YES
YES
YES
795x's Connector/
Power Supply Board
is probably faulty
Correct the
configuration
The 795x's input
circuit is probably
faulty
The transmitter or
its configuration
is probably faulty
NO
NO
NO
NO Is the
transmitter's
field wiring
correct
?
Check the field wiring
against the wiring
schedule
The field wiring
is faulty
Wire the transmitter
up according to the
wiring schedule
Replace the field
wiring to the
transmitter
Change the
Connector Board
Refer to the
transmitter's manual
formoreinformation.
Replacethe 795x's
Connector/Power
SupplyBoard
A reading from
a transmitter is
not displayed
NO
YES

PROBLEM:

Figure 11.3: Fault-finding chart 1: No reading from a transmitter

Caution:

• Whilst carrying out this procedure, you must wear and earthed wrist strap at all times to

protect the instrument against static shock.