Installation: generally, the instrument should be placed in a clean, dry, ventilated and temperature suitable environment. Instrument position should be fixed, do not move often, otherwise it may cause the signal cable plug internal lead off and cause fault.

Power supply: weighing instruments (such as series 8142, 8530, etc.) mostly use 220v ac power supply. The allowable voltage range is generally 187v -- 242v. After changing the power line, it is important to measure whether the voltage meets the requirements before energize the instrument. The instrument may be damaged if a 380 volt power supply is mistakenly applied to it. When the power supply voltage fluctuates greatly, a regulator with good performance (such as CW ac voltage regulator) should be equipped to ensure the normal use of the instrument. Do not use the same power socket with strong interference source (such as motor, bell, fluorescent lamp), so as to avoid the instrument display value is not stable. Some instruments (such as HAWK meter, etc.) for ac - dc. Pay attention to the battery leakage will damage the instrument. When the battery is not used for a long time, the battery should be removed.

Earthing: the weighing instrument shall be connected to an independent and good earthing wire (earthing resistance <4 ohms, earthing lead shall be as short as possible). Ground wire has a dual role: it has to protect the operator safety, but also has important role in anti-interference, and can guarantee the stability of instrument, ground wire on the instrument power socket, if take meter ground of high voltage in public sites online, this may create a source for instrument, instrument display value fluctuations. Check the ground connection regularly for good contact. Because after a long time, the connection point produces oxidation, corrosion and other conditions will make the instrument actually does not work.

Sun protection: avoid direct sunlight on the black case of the meter, otherwise the working environment of the meter may be damaged beyond the rated temperature range.

Waterproof: under normal circumstances, although the humidity of the instrument working environment can reach 95%, it is stipulated that no dew can be produced. Special stainless steel case with waterproof function is excluded.

Anticorrosion: corrosive substances should not be infiltrated into the meter, otherwise, the device on the circuit board and the circuit board itself will be corroded, a long time, may make the meter scrapped. Even the instrument with anti-corrosion function, if not tightly closed, will have the same result.

Lightning protection: electronic weighing device is a weak current system, vulnerable to lightning attack and damaged parts. Thunder and lightning mainly from two aspects into the meter: by the power line and by the platform through the signal cable. In normal weather, the operator only need to operate the power switch, but in the case of close lightning strike, must unplug the instrument power plug and the signal cable plug of the balance. It is better to take lightning protection measures, such as adding surge protection in the instrument power circuit.

Strong power prevention: power supply over 220 volts accidentally attached to the platform or use the platform as ground wire, welding operation on the platform may damage the instrument.

Cleaning: in the industrial environment, the instrument housing will be dusty or contaminated, must be in the case of power failure often wipe clean with a wet cloth. But should pay attention to cannot use alcohol to wait for solvent to wipe to show a window, can make transmittance so bad, show a die blurred.

Anti-static: once the meter is damaged, it should be repaired. Some units in order to make the speed of back and forth faster, like to remove the instrument PCB board, express mail, this will produce an anti-static problem. When taking the PCB board, hold the four corners of the board. Do not touch the pins of the assembly block with your hands. Because this is easy to let the static shock bad integration block. The removed PCB should be put into the shielding bag immediately, and can be wrapped with ordinary newspaper if there is no shielding bag. PCB may be damaged if the board is placed on a high insulated table. Also pay attention to anti-static when you receive the repaired PCB and need to reload the meter.