Davtron M877, Quick Start Manual

Page: 1 / 2

NOTE: Keep Alive (Pin 9) is only required if alkaline AA size battery is removed. Flight Time starts with either
Pin 3 or Pin 4 – use only one pin.
SPECIFICATIONS
 Greenwich Mean Time : 24 hour format.
 Local Time : 12 hour or 24 hour format.
 Flight Time : Records in 99:59 standard,
99.99 hour option.

Flight Time Alarm
: Full set range flight time.
 Elapsed Time Count Up : Starts in minutes,
seconds, then hours, minutes up to 99:59 hrs.
 Elapsed Time Count Down : Settable from
one second to 59 minutes, 59 seconds.
 Elapsed Time Alarm : Activates at zero
when counting down.
 Incandescent Displays Readable in sunlight.
 Automatic Dimming
 Battery Type : AA size alkaline.

Polarizing Filter

Keep Alive Current
: .00004 Amps.
 Input Current : .2 Amps.
 Input Voltage : 14V - 28V
Backlight available 5V, 14V or 28V lighting.
(Specify when ordering)
 Crystal Reference : -40C to + 60C .001%.
 Weight : 5 ounces.
 Warranty : 1 year.
ELECTRICAL
MECHANICAL
5
4
3
2
1
9
8
7
6
- +
+
Alarm Out 14V - 28V
Keep Alive .00004A
Ground to start Flight Time
Dimming 28V at 50MA, 5v or 14V available
4V to 28V Starts Flight Time
Serial Data Output/optional
14 to 28 Volts, 2A
Serial Clock Output/optional
GND
Audio Alarm
(Optional)
.25A
Battery
427 HILLCREST WAY
REDWOOD CITY (Emerald Hills) CA 94062
(650) 369-1188
www.davtron.com
2.10
1.375
2.83
1.675
.080
M877
Alkaline “AA” Battery
Locking Connector
Positronics MD9F-20J-VL
1.875
TYP. 2.22
2.375
TYP.
Mounting Hardware 4-40x
3
/
8
DIGITAL CLOCK
M877
Incandescent Display
GREENWICH MEAN TIME
LOCAL TIME
FLIGHT TIME - Flight Time Alarm
ELAPSED TIME - Count Up, Count Down, Alarm
FEATURES
 Two button control system is natural and error
free. Setting operations are identical for both
alarm and time setting. Patent Pending.
 Bright sunlight readable incandescent displays.
 Illuminated buttons and annunciators for
night viewing.
 Flight Time recorded in hours and minutes or in
hours, tenths, and hundredths.
 Serial time data output for remote use.
 Flight time alarm with external output.
 Elapsed time count down timer with alarm.
 Temperature - Compensated crystal oscillator
to maintain precision time reference.