Locking Connector
Positronics MD9F-20J-VL0
NOTE: Keep alive (Pin 9) is only required if CR2032 battery is removed. Flight Time starts
with either Pin 3 or Pin 4 - use only one pin.
DIGITAL
CLOCK
M850B
LED Display
GREENWICH MEAN TIME
LOCAL TIME
FLIGHT TIME - Flight Time Alarm
ELAPSED TIME - Count Up, *Countdown, Alarm
COUNT DOWN TIME - Countdown, Alarm
F E A T U R E S
Two button control system is natural and error-
free. Setting operations are identical for both
alarm and time setting. Patent Pending.
Bright sunlight readable LED displays.
Illuminated buttons and annunciators for night
viewing.
Flight Time recorded in hours and minutes or
in hours, tenths, and hundreds.
Serial time data option
Flight time alarm with external output.
Elapsed time with countdown timer with alarm.
Count Down Time with alarm
Crystal precision time reference.
S P E C I F I C A T I O N S
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.
Count Down Time: Settable from one
second to 59 minutes, 59 seconds.
Count Down Time Alarm: Activates at zero
when counting down.
LED Displays: Sunlight readable.
Automatic Dimming.
Battery Type: CR2032.
Polarizing Filter.
Keep Alive Current: .00004 Amps.
Input Current: .2 Amps.
Input Voltage: 14 to 28 Volts
Backlight: 5V, 14V, or 28V - user selectable.
Weight: 5 ounces MAX.
Warranty: 1 year.
5
4
3
2
1
9
8
7
6
- +
+
Alarm Out
Keep Alive .00004A
Ground to start Flight Time
Dimming 5V, 14V or 28V lighting
4V to 28V Starts Flight Time
Serial Clock Data (Option)
14 to 28 Volts, 0.2 Amps (FUSE OR BREAKER AT 1AMP)
Serial Clock Data (Option)
GND
Audio Alarm
(Optional)
.25A
Aircraft Battery
14V - 28V
M850B
1.46
2.90
.125
2.250
+.005-015
4-40 CS
82° TYP
4 PL.
CHRONOMETER
SELECT
CONTROL
CTL
SEL
GMT LT
FT ET CDT
23:59
2.375
TYP 45°
4 PL.
M E C H A N I C A L
E L E C T R I C A L
1.875
TYP.
2.238
2.375
TYP.
1.875
FRONT MOUNT
REAR MOUNT
427 HILLCREST WAY
REDWOOD CITY (Emerald Hills), CA 94062
(866) 369-5588
www.davtron.com
CHRONOMETER
SELECT
CONTROL
CTL
SEL
GMT LT
FT ET CDT
23:59
M850B
M850B
