The display may flicker, or turn off if the light level is too low. It would really have to be dim, though. It'll work fine under normal 40W fluorescent tubes. If this happens, just turn up the lights or move closer to the light source.
An arbitrary value, or the letter "E" will appear in the display if the calipers have not had the origin set. Origin setting should be done under good light. With the measuring faces cleaned and closed, hold down the ORIGIN button for more than one second. The display will read 0.00 when the setting is complete.
"Err C" is displayed and the display is flickering when the scale surface is contaminated. That means it's dirty or wet with water. Clean the scale, dry it and apply a small amount of thin oil (low viscosity) in order to repel any future water contamination.
"Err T" means there wasn't enough light. Move to a brighter area and try again. You should have an illumination of at least 300 lx to perform certain functions, like switching between inch and metric.
"E" at the end of the reading, such as 2.501E, means you've moved the slider too quickly. However, the reading is still correct. (So why do they tell you this?) Slow down a little, next time. It can't hurt.
If the electronics refuse to do anything... add them to your local land fill. Replacement parts are generally unavailable. Of course, there's a one-year warranty. Keep your sales receipt handy just in case they meet a premature demise.
For more tips on care, calibration and usage of the solar caliper refer to our general discussion of calipers on page 11.
And what if you can't find your solar powered calipers and you left them lying outside in the dark?
Bright Outdoor LED Light Solar Energy Powered - Weatherproof