FEATURES
ß
Two button control system is natural and error
free. Setting operations are identical for both
alarm and time setting. Patent Pending.
ß
Bright sunlight readable incandescent displays.
ß
Illuminated buttons and annunciators for
night viewing.
ß
Flight Time recorded in hours and minutes or in
hours, tenths, and hundreds.
ß
Serial time data output for remote use.
ß
Flight time alarm with external output.
ß
Elapsed time count down timer with alarm.
ß
A 4 MegaHertz crystal precision time
reference.
NOTE: Keep Alive (Pin 9) is only required if alkaline N size battery is removed. Flight Time starts with
either
Pin 3
or
Pin 4 – use only one pin.
SPECIFICATIONS
ß
Greenwich Mean Time
: 24 hour format.
ß
Local Time
: 12 hour format,
24 hour option.
ß
Flight Time
: Records in 99:59 standard,
99:99 hour option.
ß
Flight Time Alarm
: Full set range flight time.
ß
Elapsed Time Count Up
: Starts in minutes,
seconds, then hours, minutes up to 99:59 hrs.
ß
Elapsed Time Count Down
: Settable from
one second to 59 minutes, 59 seconds.
ß
Elapsed Time Alarm
: Activates at zero
when counting down.
ß
Incandescent Displays
: readable in sunlight.
ß
Automatic Dimming
ß
Battery Type
: N size alkaline.
ß
Polarizing Filter
ß
Keep Alive Current
: .00004 Amps.
ß
Input Current
: .2 Amps.
ß
Input Voltage
: 28V
(backlight available 5V, 14V, or 28V (must specify)
ß
Crystal Reference
: -40C to + 60C .001%.
ß
Weight
: 5 ounces.
ß
Warranty
: 1 year.
ELECTRICAL
MECHANICAL
5
4
3
2
1
9
8
7
6
- +
+
Alarm Out
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 or 28 Volts, .2A
Serial Clock Output /optional
GND
Audio Alarm
.25A
Battery
2.46 MAX
1.46
.750
.125
C
L
2.250
+.005-015
TYPE N
BATTERY
DATA PLATE / SERIAL NUMBER MOUNTED ON BOTTOM
.050
CG
CHRONOMETER
SELECT
CONTROL
CTL
SEL
GMT LT
FT LT
23:59
2.375
3.00
4-40 CS
82° TYP
4 PL.
TYP 45°
4 PL.
427 HILLCREST WAY
REDWOOD CITY (Emerald Hills). CA 94062
(650) 369-1188
www.davtron.com
DIGITAL CLOCK
M850
Incandescent Display
GREENWICH MEAN TIME
LOCAL TIME
FLIGHT TIME - Flight Time Alarm
ELAPSED TIME - Count Up, Count Down, Alarm
