
6F8A0917
5. Wiring
Cautionary notes on wiring
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| urn off mains power before working on pipes. |
|
| Install a switch and fuse to isolate the LF232 | ||||
|
|
| |||||||
|
|
| |||||||
|
|
|
|
|
| from mains power. | |||
|
|
| Working on pipes while power is |
|
|
|
|
| Power supply from mains power can |
|
|
|
|
|
|
|
| cause electric shock or circuit | |
|
| DO | applied can cause electric shock. |
|
| DO | |||
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
| |
|
| Do not work on piping and wiring with wet |
|
| Ground the LF232 independently from power | ||||
|
|
| |||||||
|
|
| |||||||
|
| hands. |
|
|
| equipment. Type D (100 ohm or less ground | |||
|
|
|
|
|
| resistance) | |||
|
|
| Wet hands may result in electric |
|
|
|
|
| Operating this product without |
|
|
| shock. |
|
|
|
|
| grounding can cause electric shock or |
|
| DON’T |
|
|
| DO | malfunction. | ||
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
| |
|
| Do not conduct wiring work with bare hands. |
|
| Use crimped terminal lugs for the terminal board | ||||
|
|
| |||||||
|
|
| |||||||
|
|
|
|
|
| and GND terminal. | |||
|
|
| Remaining electric charge even if |
|
|
|
|
| Loose connections can cause electric |
|
|
| power is turned off can still cause |
|
|
|
|
| shock, fire from excessive current or |
|
| DON’T | electric shock. |
|
| DO | system malfunction. | ||
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
| Do not modify or disassemble the LF232 |
|
|
|
|
| The label shown left is placed near | |
|
|
|
|
|
| ||||
|
|
|
|
|
| ||||
|
| unnecessarily. |
|
|
|
|
| ||
|
|
| Modifying or disassembling this |
|
|
|
|
| the terminal board for power input. |
|
|
|
|
|
|
|
| (A black border and symbol on | |
|
|
| product can cause electric shock, |
|
|
|
|
| yellow triangle) |
|
|
| malfunction of or damage to this |
|
|
|
|
| Be alert to electric shock. |
|
| DON’T product. |
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
Flowmeter performance may be affected by the way wiring is carried out. Proceed with correct wiring by observing the following items.
(1)For cable route, avoid places near electrical equipment (such as motors, transformers or radio transmitters) which cause electromagnetic or electrostatic interference.
(2)If the converter interior or cable ends get wet or humidified, deterioration of insulation occurs and this may cause malfunction or noise problems. Avoid a rainy day if wiring is carried out outdoors. Even indoors, make arrangements to prevent water from splashing over the converter and try to finish the wiring as quickly as possible
(3)Since the excitation cable and the flow rate signal cable carry very small signals, pass each of the cables separately through a thick steel conduit and keep them away from large current wiring as much as possible, and do not install them in parallel.
- 19 -