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Casio Watch Glossary
Capacity of actual features will vary by model
12/24 Hr format
Uses a sensor similar to barometric functions. As it uses pressure to take readings, they may be inaccurate due to changing air pressure.
Auto Switch Backlight
Pressure sensor measures atmospheric pressure utilizing the resistance change (piezo effect), which occurs from the distortion of four diffusion resistors which are set on silicon substrate. Receiving pressure from outside, the silicon substrate hollows out due to its suppleness and vacuum structure. At that moment, with movement of the substrate, diffusion resistance expands and the resistance changes. Since this diffusion resistance is in an electrical circuit, voltage difference occurs due to the resistance. This voltage difference is changed into digital signal by an A/D converter, and a microprocessor calculates atmospheric pressure.
Directional sensor is magnetic. In this sensor are two orthogonal coils with a MR-device (magnetic resistance device) placed between them. This detects the Earth's magnetic field (the line of the magnetic force traveling from north to south in the earth) and determines direction. The MR-device is a magnetic resistance device with a property that changes its resistance value according to magnetism. Any angle to the Earth's magnetism causes it to sense differently. The direction sensor makes use of this characteristic.
The Earth's magnetic field is small and complex in direction; therefore, the two orthogonal coils are divided into two components intersecting at right angles, making it easier to be detected. The MR device then senses both components. A microprocessor calculates direction from the voltage signals, which occur with the change in resistance.
Hourly Time Signal
When turned on, watch beeps every hour on the hour.
*Used together, Latitude and Longitude can pinpoint where you are on the earth
Lunar Tidal Interval
Built-in electrically conducting sphere and pin shaped electrodes convert the number of electrical contacts into the number of steps. The conducting metal sphere of only 1.2 millimeters diameter is normally pulled to upper part of the sensor by a magnet. As your foot is placed down, contact of the two electrodes at lower part of the sensor with the power is made towards you. When the conducting sphere makes contact with the two electrodes, which are placed apart, an electric current flows through the conducting sphere. As your foot is lifted off ground, the conducting sphere moves to the upper position. With this repetition, the number of contacts is calculated by a micro-processor and converted into the number of steps taken
Basic construction of the temperature sensor is a thermistor, which measures only 2 to 2.2 millimeters long and 1.2 to 1.6 millimeters wide. This is a semiconductor made from fine ceramic. Thermistor is specially made to react very slightly to temperature. The temperature sensor of Thermo-sensor of PROTREK converts voltage into a frequency with a frequency conversion circuit (CR oscillator circuit). Voltage is specified by the value of resistance at the present temperature. A microprocessor receives the frequency signal to calculate and measure temperature. The watch should be removed from the wrist for approximately 15-20 minutes in order to acquire an accurate reading.
*The higher an object's temperature, the higher the intensity of the infrared rays reflected off its surface.
Yacht Timer (Countdown Alarm with