24V, 17pF, surface mount CAN bus ESD protection diode

Photocoupler

1. When the laboratory selects the instrument, according to the type of use of the instrument and the geographical location to be installed, the insulation and antifreeze demand of the instrument is proposed, and then submitted to the manufacturer for processing. In some places in the north, the temperature difference between day and night is too large, and it can reach more than -20 degrees at night. If it is solved from the selection, the price/performance ratio is quite large.
Second, the insulation material insulation, that is, the insulation material is used to wrap the parts of the instrument that are easy to freeze or freeze. In winter, it is necessary to inspect and regularly discharge the sewage to prevent damage to the insulation material of the package.
Third, maintenance measures 1, installation measures Reasonable choice of installation location: dry, no rain and snow dripping. 2. When the inspection measures are met, the special person shall daily confirm whether the insulation material is damaged or whether the steam pipeline is blocked or not. 3, the alarm measures can be added to the sound leakage alarm device in the state of steam leakage or power failure, in order to facilitate the discovery and timely remediation of hidden dangers of insulation and antifreeze measures. 4. The inspection measures shall be patrolled by the responsible person of the regional instrument maintenance according to the scheduled inspection route. During the inspection, it is necessary to check whether the insulation pipeline valve is normal, whether the insulation tank is normal, whether the hydrophobic device is normal, whether the insulation material packaging is intact, and whether the electric heating supply component is normal.
Fourth, heat tracing measures 1, steam heating measures that use pipe steam heating insulation. Before the steam is supplied in winter, check whether the steam insulation pipe is unblocked or blocked. 2, insulation protection box measures 3, electric heating belt measures: electric heat insulation technology is a new type of heating technology that directly converts electrical energy into heat. Install insulated cable, wrap the heating cable around the meter, or stick it inside the instrument cabinet (but pay attention to the length of the heating cable used, and be economical)