Yokogawa µR20000 - Manual (Page 60)

2-5
IM 04P02B01-01E
Before
Us
ng
the
Recorder
1
2
3
4
5
6
7
8
9
10
11
12
App
Index
• To minimize noise caused by electromagnetic induction, twist the measurement circuit
wires at short, equal intervals.
• Make sure to earth ground the protective ground terminal through minimum resistance
(less than 100 Ω).
When usng nternal reference juncton compensaton on the thermocouple
nput, take measures to stablze the temperature at the nput termnal.
• Always use the terminal cover.
• Do not use thick wires which may cause large heat dissipation (cross sectional area of
0.5 mm 2 or less recommended).
• Make sure that the ambient temperature remains reasonably stable. Large
temperature fluctuations can occur if a nearby fan turns ON or OFF.
Connectng the nput wres n parallel wth other devces can cause sgnal
degradaton, affectng all connected devces.
If you need to make a parallel connection, then
• Turn the burnout detection function OFF.
• Ground the instruments to the same point.
• Do not turn ON or OFF another instrument during operation. This can have adverse
effects on the other instruments.
• RTDs cannot be wired in parallel.
Arrangement of the Measurng Input Termnals
A terminal cover is screwed in place on the measuring input terminal block on the rear
panel. A label indicating the terminal arrangement is affixed to the cover.
Measuring input
terminal block
Terminal cover
attachment screws
Pen Model
+/A
–/B
b
+/A
–/B
b
Channel 1
Channel 2
Channel 3
Channel 4
Channel 1
Channel 3
Channel 2
Channel 4
+/A
–/B
b
Screw input terminal Clamped input terminal
(/H2 option)
2.3 Input Sgnal Wrng