Checking An Rtd Or Rtd Circuit - Nordson 3100V Series Customer Product Manual

Control
B 2-25
Checking an RTD or
RTD
Circuit
Follow
this procedure to check an RTD or RTD circuit.
NOTE:
lf the
faulted zone is a hose or a gun, you can remove the hose
or gun
and replace it with a hose or gun that is known to be
good.
lf
the
fault disappears, then the problem is
in
the hose or gun, not inside the
unit. As an alternative to using this procedure, you can refer to your hose
or gun manual for instructions on checking the hose or gun RTD and
replacing
the gun
RTD.
WARNING:
Risk of equipment
damage, personal injury
or
death.
Disconnect and lock out
electrical power to the unit,
including inpuUoutput (l/O) lines.
1.
Place the unit's POWER switch
in
the off position, disconnect and
lock out
electrical power to the unit at the branch circuit disconnect
switch, and disconnect and lock out electrical power supplied through
any l/O wiring.
2.
Open
the electrical enclosure.
Refer
to
Opening and Closing the
Electrical Enclosure.
3.
Check
the RTD by measuring its
resistance.
Refer to Table B 2-6
lf the RTD is defective, replace the RTD.
lf a hose RTD is
defective,
you must replace the
hose.
To
replace a
gun
RTD,
refer to your
gun
manual.
To
replace
a
tank RTD, refer to
Replacing an RTD or a Thermosfatin
Repair Procedures.
NOTE:
Flex
the hose when you are checking a hose RTD.
Some
hose
FITDs
exhibit problems intermittently.
lf
the RTD is good, go to the next step.
a
a
o
2000
Nordson
Corporatlon
All rights reserved
41-3000v
lssued 5/00
82EN-04-[3V-X-4XXVj-5