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3.4 Wiring method
: Turn OFF all the power before starting a wiring work to prevent a risk of electric
shocks.
: Be sure to enforce construction of specified grounding.
The external terminals are provided on the rear of the instrument.
Carry out wiring to each terminal according to the figure. Terminal screws are M3.5 (but power
terminals are M4).
Use shielded wires for the output signals to suppress the influence of external noise.
CAUTIONS
3.4.1 Power terminals
The power terminals are arranged as shown in the figure.
Connect the specified power supply to the terminals and
connect a grounding wire to the ground terminal.
The grounding should be made securely.
Use solderless terminals (for M4) for connection to the
terminals.
When noise generating source is located nearby
Avoid installing this analyzer near an electrical appa-
ratus which produces power source noise. (Such as
high frequency furnace, electric welder, etc.) If use of
the analyzer near such an apparatus is unavoidable,
then keep the power lines separate to avoid noise.
If noise from a relay, solenoid valve or the like enters
the power source, then attach a varistor or a spark
killer to the noise source as shown in the figure.
Note that attaching the varistor or spark killer away
from the noise source will be ineffective.
ZRF
power supply
Varister or spark killer
Close connection
Noise
generating
source
Grounding wire
Power supply
E
Source
Power terminals (see 3.4.1)
Auto CAL input /output terminal (option) (see 3.4.5)
O
2
input/output terminal (option) (see 3.4.4)
COMP2 (2nd component) input/output terminal (see 3.4.3)
COMP1 (1st component) input/output terminal (see 3.4.2)