# Use Time of Linshang UV Energy Meter at Different High Temperature

From:Linshang Time:2019/11/19 14:14:00 Browse:789

Linshang UV energy meters (LS120, LS128, LS130, LS131) are widely used in the UV curing industry. Customers from all walks of life often ask about the working temperature of the instrument, such as "How long can Linshang UV energy meter be used at a certain temperature?" Because there are various industries, the ambient temperature and the tested temperature are different. Linshang has no way to know the exact use time of the instrument. The following picture shows four Linshang UV energy meters:

The operating temperature of an electronic instrument generally cannot exceed 85 degrees. But since the instrument is placed in a high temperature environment from the room temperature, the instrument itself has a process of increasing temperature. So in the case of high temperature, it generally works for a certain period of time.

## 1. Test in 100 degree boiling water.

Pack the instrument in a sealed bag and put it into 100-degree boiling water for testing. Under these conditions, the instrument can work for a long time without affecting the measurement. At 100 °C, the LCD will turn black and return to normal at room temperature.

1. Instrument initial temperature (ambient temperature): 25 degrees

2. Instrument test temperature: 100 degrees

3. Test time: 2 hours

4. Test results: The instrument works at the test temperature for a long time and can be used normally.

## 2. The Linshang UV energy meteris placed in a 120 degree high temperature chamber at 27 degree room temperature for 20 minutes.

1. Instrument initial temperature (ambient temperature): 27 degrees Celsius

2. Instrument test temperature: 120 degrees Celsius

3. Test time: 20 minutes

4. Test results:

• LCD screen become unclear, the energy meter will return to normal in normal temperature;

• Test data and functions are OK;

The temperature rise graph of the instrument is shown in the figure below. The temperature of the instrument gradually rises from room temperature to about 105 degrees.

Remarks:The abscissa is the number of recorded data. One data is recorded in 0.5 seconds, indicating that the instrument is placed in a 120 degree environment under conditions of 27 degrees. And it takes 20 minutes for the temperature of the instrument to reach 105 degrees.

## 3. The Linshang UV energy meter is placed in a 150 degree high temperature chamber at 27 degree room temperature for 20 minutes.

1. Instrument initial temperature (ambient temperature): 27 degrees Celsius

2. Instrument test temperature: 150 degrees Celsius

3. Test time: 20 minutes

4. Test results:

• LCD screen become unclear, it will return to normal when the temperature returns to normal;

• Test data and functions are OK;

The temperature rise graph of the instrument is shown in the figure below. The temperature of the instrument gradually rises from room temperature to 125 degrees (the maximum temperature that the instrument can test is 125 degrees, so the parallel line after 125 degrees, the actual temperature will be higher)

Remarks:The abscissa is the number of recorded data. One data is recorded in 0.5 seconds, indicating that the instrument is placed in a 150 degree environment under conditions of 27 degrees. It takes 15 minutes (1800*0.5/60=15) for the instrument to reach 125 degrees.

## 4. The Linshang UV energy meter is placed in a 150 degree high temperature chamber at 27 degree room temperature for 30 minutes.

1. Instrument initial temperature (ambient temperature): 27 degrees Celsius

2. Instrument test temperature: 150 degrees Celsius

3. Test time: 30 minutes

4. Test results:

• LCD screen become unclear, the LCD edge become a little yellow;

• During the test, some LCD are damaged and the function cannot be restored;

• The instrument that can be recovered, the test data and functions are OK;

The temperature rise graph of the instrument is shown in the figure below. The temperature of the instrument gradually rises from room temperature to 125 degrees (the maximum temperature that the instrument can test is 125 degrees, so the parallel line after 125 degrees, the actual temperature will be higher)

Remarks:The abscissa is the number of recorded data. One data is recorded in 0.5 seconds, indicating that the instrument is placed in a 150 degree environment under conditions of 27 degrees, which takes 15 minutes (1800*0.5/60=15),for the instrument to reach 125 degrees.

## II.summary about the above experiences:

The UV energy meter is placed in a high temperature test environment from room temperature. In the high temperature environment, the temperature of the instrument itself needs to rise, so it can withstand high temperature for a short time. For example, when the instrument is placed into the test environment of 150 degrees from 27 degrees. It takes 15 minutes to reach 125 degrees.

Different test temperatures, different instrument initial temperatures. The working time of the instrument is also different.

Different instrument initial temperature and test temperature, please refer to the above temperature graph estimation for specific working time.

## III.Linshang UV energy meter test at high temperature:

1. It is not possible to test continuously at high temperatures because the temperature of the instrument has not yet fallen. The lower the initial temperature of the instrument, the longer the test time it can withstand.

2. Working temperature limits of electronic components and liquid crystal. The general industrial grade chip temperature is 85 degrees. The components of the Linshang UV energy meter are high temperature resistant device, but they are not recommended to use it over 85 degrees for a long time. Especially in the case of more than 100 degrees, long-term testing can damage the instrument.

3. The above test temperature, 120 degrees, 150 degrees, are used in ultra-high temperature, Linshang technology just used a few prototypes to do the above test, there is instrument damage in 30 minutes at 150 degrees. So we do not promise every instrument can pass the above tests and not promise that the instrument will not be damaged or the service life will not be affected under such test conditions.