Infrared Thermometer when using several issues need to pay attention to
1, infrared thermometer should try to set up around some of the "baffle", or even with a thin metal plate to cover up the thermometer.
This can prevent debris staining the pyrometer and some movable parts, and this "staining" will often make the movable part of the movement is not happy, and affect the weighing accuracy. Whether the system has the movement of the phenomenon, you can use the following methods to identify. That is, on the scale plus or minus about one-thousandth of the rated load to see if the electronic weighing scale weighing display instrument is reflected, reflected, indicating that the movable part is not "tainted.
2, all leads to the display circuit or lead from the circuit, should be shielded cable.
Shielded wire connection and grounding should be reasonable. If not grounded through the mechanical frame, then grounded outside, but the shielded wires are connected to each other not grounded, is floating.
Note: There are three pyrometers are fully parallel connection, the pyrometer itself is 4-wire, but in the junction box for 6-wire connection. Pyrometer output signal readout circuit should not be able to produce strong interference with the device can be "silicon, contactors, etc.) and there is considerable heat generated by the equipment in the same box, if you can not guarantee that this point, it should be considered to set up a baffle between them to isolate it, and in the box placed in the body of the fan. Used to measure the output signal of the pyrometer electronic circuit, should be configured as far as possible independent power supply transformer, and do not share the same main power supply and contactors and other equipment.
3, infrared thermometer should be used hinged copper wire (cross-sectional area of about 50mm2) to form an electrical bypass to protect them from welding current or lightning hazards. Pyrometer use, must avoid strong thermal radiation, especially unilateral strong thermal radiation.
4, electrical connection preparation (such as pyrometer signal cable, not and strong power line or control line parallel arrangement (for example, do not put the pyrometer signal line and strong power line and control line placed in the same pipe). If they must be placed in parallel, then, the distance between them should be maintained at more than 50CM, and the signal line with a metal pipe sleeve.
5, as far as possible, the use of automatic positioning (reset) role of the structure of the accessories, such as ball bearings, joint bearings, positioning fasteners.
They can prevent some lateral force acting on the pyrometer. It should be noted that some lateral forces are not caused by mechanical installation, such as lateral forces caused by thermal expansion, lateral forces caused by wind, and lateral forces caused by vibration of agitators on some container scales, i.e., they are not caused by mechanical installation. Some scales must be connected to the scale body on some attachments (such as container scales feeding pipes, etc.), we should let them in the direction of the thermometer loading spindle as soft as possible, in order to prevent them from "eating" the thermometer's real load together and cause errors.
6, to take lightly put especially by the aluminum alloy to make elastomers of small-capacity pyrometer, any impact, fall, on its measurement performance may cause great damage. For large-capacity infrared thermometer, in general, it has a large self-weight, so the requirements in the handling, installation, as far as possible, the use of appropriate lifting equipment (such as hand-operated hoists, electric hoists, etc.). Installation of the thermometer base mounting surface should be flat, clean, without any oil film, adhesive film and so on. Installation of the base itself should be sufficient strength and rigidity, generally require higher than the strength and stiffness of the thermometer itself.
