Davtron M877 - User Manual

NOTE: Keep Alive (Pin 9) is only required if alkaline AA size battery is removed. Flight Time starts with e ither
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.

Davtron M877 Specifications