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* Reverse the front of the probe to a table or other flat surface with the back side facing up.
* Press the zero button to make the display value zero. 4) Place the UV probe directly under the light source. The UV value is shown on the LCD. 5) Data retention * During measurement, press the “Hold†key. The reading will be Locked and the LCD shows “DH†symbol* Press the “Hold†button again to cancel the data retention function. 6) Data logging (Max./Min. value)
* The data recording function shows the maximum/minimum reading. Press the "Record" button to start data recording. LCD displays "REC" symbol * When "REC" symbol is displayed a) Press "Recall" key, "Max" symbol and maximum reading will be displayed on LCD b) Press "Recall" again, "Min" The symbol and the minimum reading will be displayed on the LCD. c) Press the “Recall†button again to return to the data recording function. The relevant symbol will disappear. Measurement Considerations * Due to the structural limitations of the UV probe, the output value of the probe may have a deviation of approximately 1% after one year, which is normal. That is, the standard measurement period of the probe is one year.
* Because the probe (filter) is sensitive to changes in humidity, the saved environment is important. When you do not use this watch for a long time, be sure to keep the probe in a low humidity environment. For example, keep the probe in a dry plastic bag. With proper preservation, the life span of the probe will be much longer. * Based on the law of cosine, the input signal of the UV probe conforms well to the law of cosine (conformance > 95%) at 30 degrees of incident light. In the case of a 45-degree angle, the degree of coincidence is >90%. Therefore, the effective incident angle is 45 degrees. Of course, it is better to be limited to 30 degrees. When calibrating, the incident angle of light should be 0 degrees (vertical)
*Retention of the UV probe The structure of the UV probe is very precise. When not in use, it must be stored in a dry environment. For example, put the probe in a plastic bag with the desiccant and seal it.
Only take it out when using the probe. Using the above method can extend the life of the probe. Otherwise, the gain of the probe will decrease and the correction period will shorten. In addition, the desiccant should be replaced regularly.
6. Other features In order to extend the battery life, the watch has an automatic shutdown function, no operation for about 10 minutes, the machine will automatically shut down to disable the automatic shutdown, press the "Record" in the measurement, select the memory recording function 7. Ultraviolet Irradiometer RS232 Computer Interface (Optional) How the UV Tester operates The watch is output via a 3.5mm RS232 port. The 16-bit data stream output from the connector can be used for the user's special purpose 8. Internal Zero Adjustment Zero adjustment in Chapter 4-3 is a normal zeroing procedure, however, the "Zero" key adjustment range is only 20 units. If the internal zero reading deviation exceeds 20 units, the "Zero" key is No longer working, it will show:
At this time, internal zero adjustment is required. The steps are as follows:
1) Turn off the power 2) Press the "Zero" button and turn on the power until the LCD shows as shown in the figure below, then release the "Zero" key. The upper line shows: Display the internal zero reading The following line shows: Always display " 0000"
3) Adjust VR9 so that the reading shows zero. 9. Replace the battery 1) When “LBT†is displayed on the LCD, it indicates that the battery output voltage is lower than 6.5V-7.5V. The battery must be replaced, but it can continue after the low power is displayed. Use several hours 2) Open the battery cover, remove the old battery 3) Install a 9V battery (high energy battery), cover the battery cover
How to operate the ultraviolet meter 1) Press the "Power" button to turn on the power 2) Press the "Range" button to select the maximum range * If "----" is displayed, it means that the range is out of range, select a similar high range 3) Zero step to set the range Set to "199.9uW/cm2"