The battery output of light meters can fluctuate, which will alter the readings of the light meter. You can try to prevent this by checking the batteries as much as possible and using a meter that has a low battery indicator. It is helpful if you measure the first point once again and then compare the two values.

If the light is at an angle, the refraction of light can cause meter errors. Readings can be inaccurate by 25 percent, but the cosine correction feature on the light meter will prevent those miscalculations. It is important to always calibrate the light meter. If you do not maintain the calibration, the measurement scale will be off.

As with many other sensors, light meters do not function properly if they are not well cared for. High temperatures will prevent the photoconductor sensors from working. The sensors on light meters will get damaged if placed in temperatures above 120 degrees fahrenheit.

The sensitivity of the light meter’s sensor will be affected with the exposure of light. Keep the cover on the sensor up until 15 minutes before using the light meter. Avoid using the light meter in direct light.

Light meter scales on the end of the light meter are subject to error. In analog meters this is particularly true. This problem’s best solution is to store a couple different fc scales on the meter. Use the reading you see on the center scale to increase the accuracy of the reading.

A sample and hold button will prevent inaccuracies in light meters that have sensors in the readout assembly. Some of the light from these sensors is blocked by the device operator. Connect the meter and the sensor and then use the sample hold button for gathering information.

The Safety Of Light Meters is a post from: WiredWriter