Chino AH3000 Series User Manual

4-2
More than 3.7
Less than 8
Less than 8
More than 3.7
4.2 Cautions on Connections
Observe the following cautions during connections for securing safety and reliability.
1. Feed source power supply
Use a single-phase power supply having a
stable voltage without any waveform distortion
for the purpose of preventing wrong operations.
Add a switch and an overcurrent protective
device (3A) to the feed source power supply
for preventing an electric shock accident
during connection work. This instrument is
not provided with any replaceable
overcurrent protective device.
Turn off the feed source power supply in
advance without fail for preventing an
electric shock accident when the power
supply and input/output terminals are
connected.
2. Separate input/output
connections from a strong
power circuit
Don’t place the input/output cables to be close to or
in parallel with any strong power circuits
including power line. Separate them more than 50
cm from strong power circuits when they are
placed to be close to or in parallel with strong
power circuits.
3. Separate the thermocouple input
terminals from a heat source
For thermocouple inputs, separate the input
terminals from a heat source (a heating body) for a
purpose of reducing a reference junction
compensation error. Don't expose the input terminals
to the radiation of direct sunlight, etc.
4. Separate all connection
cables from noise sources
Separate all connection cables to the instrument from
a noise source as far as possible, otherwise an
unexpected trouble may occur. Take a remedial
measure if the cables cannot be separated from a
noise source due to unavoidable circumstances.
Major noise sources Remedial measures
Electromagnetic switch,
power line having
waveform distortion,
inverter, thyristor regulator
Insert noise filters
between power
terminals and
input/output terminals.
A CR filter is often used.
5.Use crimp style terminals
1) Mount crimp style terminals as connection cables'
termination for preventing the looseness or
disconnection of terminals and a short-circuit failure
between terminals.
2 ) For crimp style terminals, use an insulation sleeve for
preventing an electric
shock accident.
6. Unused terminals
Don't use any unused terminals for relaying, otherwise
electric circuits may be damaged.
Treat connected cables securely so as not to allow them to be hooked by a person or a substance,
otherwise the connections may be disconnected or cut to cause an electric shock accident or other
accidents.
Terminal
name
Screw
diameter
Tightening
torque
Termination (unit: mm)
Power and
protective
conductor
terminals
M4 1.2 N.m
Terminals
other than
described
above
M3.5 0.8 N.m
Addition of a switch and an
over current protective device
Warning
Turn off the feed source powe
r
supply before starting connection
s
Warning
Treat connected cables properly
Warning
More than 4.3
Less than 8.5
t : 0.8
(with an insulation sleeve)
t : 0.8 (with an iosulation sleeve) t : 0.8 (with an insulation sleeve)
Use O-chi
p
(
left side
)
Kinds of terminals and terminarion
Reference

Chino AH3000 Series Specifications

General

Input Type	DC Voltage, Thermocouple, RTD, DC Current
Chart Width	100 mm
Power Supply	100 to 240 VAC ±10%, 50/60 Hz
Measurement Range	Depends on input type
Response Time	1 second or less
Operating Temperature	0 to 50°C