ASAHI CSR-3005E, Инструкция по эксплуатации

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5
■
Principle and structure
(Fig.4-2)
Model CSR-3005E is an intrinsic safety type explosion-proof transducer.
Floater has three electrodes, and high frequency current provided from its detector circuit
checks the electrostatic capacity at the electrode section.
When oil flows out onto water surface, the electrodes have to contact water through the oil
layer, which causes their electrostatic capacity to vary largely.
This variation in electrostatic capacity is detected and amplified in the detector circuit
causing the transducer to work and put out contact signals.
①
②
③
④
⑩
⑨ ⑧ ⑦ ⑥ ⑤
P2 N2 E2
P1 N1 E1
B1 B2 OV C1 A1 C2 A2
P N E
100
～ 110
V 200
～ 220
V
G
①
Dry pit attachment: The detector electrode will be grounded when the water level is
getting low in the pit.
②
Ball float: It prevents the detector from leaning because of the weight of a cable when
water level is unstable.
③
APOLARM-C:CSR-3005E
④
Apolarm guide: It prevents the detector from leaning and moving because of water
current and the level is unstable.
⑤
Angle iron: It holds the Apolarm guide.
⑥
Junction box: Use this box for the cable connection if the distance between detector and
transducer is more than 12 meters.
⑦
Extension cable
⑧
Transducer:AS-40E
⑨
Transducer Box: Use this box if the environmental condition is not good for the
transducer.
）
⑩
Power and signal cable
※ ①
,
②
,
④
,
⑤
,
⑥
,
⑦
,
⑨
and
⑩
are optional accessories.
Fig4-2