Simple, easy to use and easy to use LCD display of time, with
elapsed time counter. Fits into a standard 57 mm (2 1/4 in) instrument hole.
The version I sell includes a backup battery so the clock does not lose
time when disconnected from 12V power. The display is not visible
when not connected to 12V power, but at least you do not need to reset
the clock every time you remove your glider battery.
- Two button control system is natural
and error free. Setting operations are identical for both alarm and
time setting (US Patent 4,486,077).
- Greenwich Mean Time in 24 hour
- Local Time in 12 hour format
- Elapsed Time counter, from one
second to 99 hours, 59 minutes.
- Elapsed Time countdown timer, from
one second to one hour.
- Elapsed Time visual alarm activated
when countdown reaches zero.
- Alarm flashes display and has
external output for optional audio alarm.
- Liquid Crystal Display has high
contrast in bright sunlight. Display has a lighting system that
provides uniform night illumination. The display has an ultraviolet
filter to prevent sunlight damage. The LCD used in the M800 has high
humidity protection and uses a fluid operable over a wide
- 4 MegaHertz crystal precision time
MODEL 800 OPERATION
The SEL button selects what is to be displayed on the four digit window
and the CTL button controls what is
being displayed. Pressing select sequentially selects GMT, Local Time,
Elapsed Time and back to GMT.
The control button starts and resets Elapsed Time when momentarily
pushed. Normal operation of the M800
cannot accidentally reset time.
Select GMT for display in the four digit window with the SEL button.
Simultaneously press both the select and
control buttons to enter the set mode. The tens of hours digit will
start flashing. The control button has full
control of the flashing digit and each button push increments the digit.
Once the tens of hours is set the
select button selects the next digit to be set. After the last digit has
been selected and set with the control
button, a final push of the select button exits the set mode. The
lighted annunciator will resume its normal
flashing, indicating the GMT clock is running.
Select Local Time, LT, using the SEL button. Simultaneously push the SEL
and CTL buttons to enter set
mode. The tens of hours digit will start flashing. The set operation is
the same as for GMT, except that
minutes are already synchronized with the GMT clock and cannot be set in
Hold the SEL button for three seconds and the display will indicate
88:88 and activate all four annunciators
Elapsed Time Count Up
Select Et for display. Pressing the CTL button will start ET counting.
Elapsed Time counts up to 59 minutes,
59 seconds, and then switches to hours and minutes. It continues
counting up to 99 hours and 59 minutes.
Pressing the CTL button again resets to zero.
Elapsed Time Count Down
Select ET for display and enter by pressing both buttons. The countdown
timer can now be set. Entering
the time is identical to GMT time setting. When the time is entered and
the last digit is no longer flashing
the clock is ready to start the countdown. Momentarily pressing the CTL
button starts the countdown.
When the count reaches zero the display flashes and the external alarm
is activated. Pressing either SEL
or CTL will deactivate the alarm. ET continues counting up until the CTL
button is pressed.
- Greenwich Mean Time: 24 hour format.
- Local Time : 12 hour format
- Elapsed Time Count Up: Starts in
minutes, seconds then hours, minutes up to 99:59 hours.
- Elapsed Time Alarm: Activates at
zero when counting down.
- Internal Lighting: 100 MA at 14
Volts, 50 MA at 28 Volts.
- Keep Alive Current: .0003 Amps. 14V,
.001 Amps. 28V.
- Voltage: 14V
- Crystal Reference: -40C to +60C
- Warranty: 1 year
Note: If your airframe is not listed on
the Davtron PMA FAA Approval
List for the unit you're installing, you need to complete a 337 form
and file with your local FSDO.
Sample 337 Form
Manuals & Brochures