Here are some helpful tips to follow: Use fresh spinach for photosynthesis studies. Check to make sure it is fresh and that leaves are turgid because wilted spinach will yield poor results, as will spinach that has been treated with preservative...

Ideas found in the User Manual Analyze a crouched jump. Start with knees bent, hands on hips. Do NOT lower your body further; jump up only. Do not move your arms. This very artificial jump is easier to analyze than a natural jump. Use the impul...

This limitation only affects LabPro. LabQuest platforms and interfaces (all models) are unaffected. A photogate and an analog sensor such as a force sensor are in use together, and both have live readouts that behave normally. However, on data colle...

One possible problem when using the Dual-Channel Amplifier of the Current and Voltage System is that you always have to plug in the Channel 1 cable. If you do not, the amplifier circuitry of the Dual-Channel Amplifier does not get power and the readi...

This answer assumes all of the following: • You are using our LEGO NXT adapter with a LEGO NXT Robotics Kit. • You are using LEGO Mindstorms software after importing our Vernier Sensor block. There are three ways to display data: LEGO M...

This problem shows up both as noise and as a change in calibration of the Dual-Range Force Sensor when the Motion Detector is used at the same time with a LabPro interface. The problem does not happen with all Dual-Range Force Sensors, and it does no...

This one of the more common forms of damage to a force sensor by a student. What happens is that if the sensor gets hit hard, the strain gauge inside bends to one side and stays there (usually pushed in). If the sensor is working correctly the ra...

The D.O. Filling solution recipe is a proprietary recipe owned by our electrode manufacturer. We do not have that recipe and are not able to distribute it to customers. The probe manufacturers feel strongly that people making up their own solutio...

The standard hole size in regular stoppers is larger than the diameter of the Stainless Steel Temperature Probe. One solution is to drill your own holes in a solid rubber stopper. Use a drill bit with the same diameter as the Temperature Probe for a ...

If a pH probe is drifting or not holding a calibration immediately after the calibration process is performed with freshly prepared, accurate standards, then there may be a few things wrong with it. First, consider the age of the pH Sensor. How o...