4532 | Safety instructions |
|
|
2.6Notes on safety conventions and symbols
In order to highlight
Safety conventions
Warning! | Warning! |
| A warning highlights actions or procedures which, if not performed |
| correctly, will lead to personal injury, a safety hazard or destruction of |
| the instrument |
Caution! | Caution! |
| Caution highlights actions or procedures which, if not performed |
| correctly, may lead to personal injury or incorrect functioning of the |
| instrument |
Note! | Note! | ||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
| A note highlights actions or procedures which, if not performed |
|
|
|
|
|
|
|
|
|
|
|
|
| correctly, may indirectly affect operation or may lead to an instrument |
|
|
|
|
|
|
|
|
|
|
|
|
| response which is not planned |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Explosion protection |
| ||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Device certified for use in explosion hazardous area |
|
|
|
|
|
|
|
|
|
|
|
|
| If the device has this symbol embossed on its name plate, it can be |
|
|
|
|
|
|
|
|
|
|
|
|
| installed in an explosion hazardous area |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Explosion hazardous areas |
|
|
|
|
|
|
|
|
|
|
|
|
| Symbol used in drawings to indicate explosion hazardous areas. |
|
|
|
|
|
|
|
|
|
|
|
|
| • Devices located in and wiring entering areas with the designation |
|
|
| EX | “explosion hazardous areas” must conform to the stated type of | |||||||||
|
|
|
|
|
|
|
|
|
|
|
|
| protection |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Safe area |
|
|
|
|
|
|
|
|
|
|
|
|
| Symbol used in drawings to indicate, if necessary, |
|
|
|
|
|
|
|
|
|
|
|
|
| hazardous areas. |
|
|
| EX | • Devices located in safe areas still require a certificate if their | |||||||||
|
|
|
|
|
|
|
|
|
|
|
|
| outputs run into explosion hazardous areas |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Explosion protection |
| ||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Direct voltage |
|
|
|
|
|
|
|
|
|
|
|
|
| A terminal to which or from which a direct current or voltage may be |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| applied or supplied |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Alternating voltage |
|
|
|
|
|
|
|
|
|
|
|
|
| A terminal to which or from which an alternating |
|
|
|
|
|
|
|
|
|
|
|
|
| voltage may be applied or supplied |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Grounded terminal |
|
|
|
|
|
|
|
|
|
|
|
|
| A grounded terminal, which as far as the operator is concerned, is |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| already grounded by means of an earth grounding system |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Protective grounding (earth) terminal |
|
|
|
|
|
|
|
|
|
|
|
|
| A terminal which must be connected to earth ground prior to making |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| any other connection to the equipment |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Equipotential connection (earth bonding) |
|
|
|
|
|
|
|
|
|
|
|
|
| A connection made to the plant grounding system which may be of type |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| e.g. neutral star or equipotential line according to national or company |
|
|
|
|
|
|
|
|
|
|
|
|
| practice |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Varec, Inc. | 5 |
