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Item Includes Description Features Specifications

Gralab 555 Electronic Digital Switching Timer

Mfr. Part: 555     SKU: GL555

Gralab 555 Electronic Digital Switching Timer
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Description
Replacing the 545/645, the 555/655 are ready to go to work for you. These timers are excellent performers for timing kinetic 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.

Features
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 cycle
Tone every one second interval and none at end
Tone every 30 seconds & every second for last 10 seconds, no tone at end
No Tone
Clear/Reset
Erases or clears time settings. Push once to reset time in memory. Push twice to clear time in memory to zero.
Start/Hold
Initiates timing cycle. Push once to freeze time during cycle. Push second time to restart cycle.
Count Up/Down
Elapsed time will ascend or descend on the display.

Specifications
Time Range.1 second to 59 minutes 59.9 seconds
in minutes, seconds and tenths of a second
AccuracyBetter than ±.015% @ 10 seconds (25°C ambient, no load)
Repeatability: + .005% @ 10 seconds (25°C ambient, no load)
Max. Lamp Load500W
Max. Resistive Load1000 W
Max. Motor Load1/4 HP
Number of Outlets2 Function under timer control or independently
Audible Options4: One second long tone at end of cycle
Warning tone at 30 second intervals
One second interval metronome
No tone
MemorySingle
Display5 1/2' inch LED's
3 brightness levels/ Off
Auto ResetYes
Foot SwitchYes
Voltage100-130 VAC, 50/60 Hz
Housing MaterialPlastic