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Gralab 555 Electronic Digital Switching Timer

Gralab 555 Electronic Digital Switching Timer by GraLab $139.00 At Amazon on 2-6-2012.

5-Digit LED Display These 1/2 in. LEDs show time settings as you program your timer and indicate timing when the timer is operating. You can set the time to count up or count down by using the COUNT UP/DOWN button.The intensity of the display is controlled by the DISPLAY button on your touch pad. Time Set Buttons The top row of buttons labeled "minutes" and "seconds" allows you to set the timing sequence. The timing range is 59 minutes; 59.9 seconds to .1 seconds. By holding down the buttons, you can scroll through the settings. Oulet Control Buttons The center row of buttons labeled with an A or B allows you to control the outlets. The ON/OFF buttons simply turns the outlets on or off. It allows you to connect your equipment with no power at the outlets. The TIME/TIME buttons put the outlets under control of the timer. The LEDs indicate outlet status, on or off. Tone Control Button This button controls the tone the timer makes as it counts through the timing sequence. There are four modes by pressing the button:Tone every one second interval and at end of cycleTone every one second interval and none at endTone every 30 seconds & every second for last 10 seconds, no tone at endNo Tone Clear/Reset Erases or clears time settings. Push once to reset time in memory. Push twice to clear time in memory to zero. Replacing the 545/645, the 555/655 are ready to go to work for you. These timers are excellent performers for timing Kinetic Watches experiments, start and stop times for gas chromatography, safety shutoff on critical equipment, centrifuges, x-ray equipment and quality control analysis. The 555/655 have an instantly repeatable time cycle, and these digital circuits react little to power line interference and none to frequency variations. Back To Top Gralab 555 Electronic Digital Switching Timer Available from Amazon Price: $139.00 Updated on 2-6-2012.

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