3
1. Installation Precautions
Caution
This instrument is intended to be used under the following environmental conditions
(IEC61010-1): Overvoltage category
, Pollution degree 2
Ensure the mounting location corresponds to the following conditions:
• A minimum of dust, and an absence of corrosive gases
• No flammable, explosive gases
• No mechanical vibrations or shocks
• No exposure to direct sunlight, an ambient temperature of 0 to 50
(32 to 122 ) that does not change
rapidly, and no icing
• An ambient non-condensing humidity of 35 to 85 %RH
• No large capacity electromagnetic switches or cables through which large current is flowing.
• No water, oil or chemicals or where the vapors of these substances can come into direct contact with
the unit
• Please note that the ambient temperature of this unit – not the ambient temperature of the control
panel – must not exceed 50
(122 ) if mounted within a control panel, otherwise the life of electronic
components (especially electrolytic capacitors) may be shortened.
Note: Avoid setting this instrument directly on or near flammable material even though the case of
this instrument is made of flame-resistant resin.
2. Wiring Precautions
Caution
• Do not leave wire remnants in the instrument, because they could cause a fire or malfunction.
• Use correct fitting ferrules with an insulation sleeve for the terminal screw when wiring the DCL-33A.
• Tighten the terminal screw using the specified torque. If excessive force is applied to the screw when
tightening, the terminal screw or case may be damaged.
• Do not apply a commercial power source to the sensor which is connected to the input terminal nor
allow the power source to come into contact with the sensor.
• This instrument does not have a power switch, circuit breaker and fuse. Therefore it is necessary to
install a power switch, circuit breaker and fuse externally near the controller.
(Recommended fuse: Time-lag fuse, rated voltage 250 V AC, rated current 2 A)
• For a 24 V AC/DC power source, do not confuse polarity when using direct current (DC).
3. Operation and Maintenance Precautions
Caution
• It is recommended that auto-tuning be performed during the trial run.
• Do not touch live terminals. This may cause an electric shock or problems in operation.
• Turn the power supply to the instrument OFF before retightening the terminal or cleaning.
Working on or touching the terminal with the power switched ON may result in severe injury or death
due to electrical shock.
• Use a soft, dry cloth when cleaning the instrument.
(Alcohol based substances may tarnish or deface the unit.)
• As the display section is vulnerable, do not strike or scratch it with a hard object or press hard on it.
Characters used in this manual
Indication
Number, /
-1
0
1
2
3
4
5
6
7
8
9
Indication
Alphabet
A
B
C
D
E
F
G
H
I
J
K
L
M
Indication
Alphabet
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Содержание DCL-33A
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