1. Operation and management of the instrument must appoint an authorized person to assure the instrument a reliable and long time service.
2. Please keep the environment clean, dry with no contamination. The operational environment temperature is 5-30ºC, relative humidity is ≤80/%. When the environmental temperature is lower than 0, the circulating water must be drained off from the instrument to prevent some units from cracking.
3. In rainy days or seasons, it is appropriate to start the instrument early to prevent inside moisture and high-voltage discharge in some units.
4. Check the voltage of the power supply it must be in the range 220V±10%. Too high voltage will decrease the life span of the instrument, and too low voltage will influence the normal output power. You can use a voltage stabilizer in necessary conditions.
5. If contamination of the output end-surface of light-guiding crystal occurs, please wipe it with absorbent cotton and alcohol.

1. The instrument must be placed in a clean, dry and ventilated place, where the surrounding temperature is 5-35°C and relative humidity is lower than 80%. Avoiding erosive air is necessary.
2. Avoid great shaking or striking during transportation. Protect it from rain and strong sunshine.
3. It is prohibited to transport or store the instrument below 0ºC temperature when the water container has been filled with water.

Our company provides free-of-charge parts replacement and service labor to the product within one year from the date of purchase. The scope of the warranty is as follows.

1. It is definitely the fault of the producer that caused the instrument to malfunction or to stop working.
2. The failure occurred under normal operation.
3. Producer has carried out delivery of the instrument to the customer according to the contract, the damage occurs during transportation.