background image

 

DISPLAY SELECT

The switch marked Time/F.T./E.T. is a three 
position switch that selects the function to be 
displayed.  

 

TIME

When the time function is selected, the proper 
time will read in hours, minutes, and seconds. The 
time channel may be set to local time or G.M.T.

SETTING TO ACCURATE TIME

Davtron sets the clock to the correct GMT time 
when it leaves the factory.  To change hour, push 
Dim/Bright switch to 1hr up position.  Each press 
or just holding it in the 1hr up position will 
increase time by one hour.  This setting does not 
affect the minutes or seconds.  The switch 
marked Set is for changing minutes or seconds.  
When you hold Set switch in UP mode, minutes 
will count one per second until 5 seconds elapse, 
then minutes speed up to 5 minutes per second.  
When you hold Set switch in the D, down position 
the seconds reset to zero.  During the time the 
clock is being set, the Elapsed Time and Flight 
Time still continue to operate normally.  The 
Set switch is a momentary switch and automati-
cally returns to the center position.

FLIGHT TIME RECORDER

When the Flight Time channel is selected, the 
actual time in flight will be displayed in hours, 
minutes, and seconds.  The Flight Time channel is 
controlled by either applying a voltage to the blue 
control lead or ground to the orange control lead.  
Anytime during flight the pilot may check total 
time in flight.  When the aircraft has landed, the 
pilot can record total Flight Time.  The pilot can 
have total Flight Time on a trip with a number of 
stops if he avoids returning the Flight Time 
recorder to zero.  The Flight Time recorder will 

total time up to 99 hours.  Normally it is 
recommended that the Flight Time recorder be 
zeroed on the pre start up check list of the 
aircraft.  The Flight Time can be zeroed by holding 
the switch to ZERO for 3 seconds.

ELAPSED TIME METER

When the Elapsed Time channel is selected the 
Elapsed Time meter will read in hours, minutes, 
and seconds.  This recorder is fully controlled by 
the pilot from the front panel.  It may be started, 
stopped and returned to zero for elapsed time, 
approach time, etc. Total time is up to 99 hours.

ELAPSED TIME COUNT DOWN

When the Elapsed Time channel is selected and 
the toggle that controls the ET channel is at Stop 
you’re ready to set time for the count down time.  
Entering the time is identical to setting time.  
Once time is updated for ET, push toggle to run 
and time will begin to count down.  When the 
count reaches zero the displays will flash.  Toggle 
to the Stop position to stop the counting and 
flashing, but then you can toggle back to RUN to 
continue counting.  Toggle to zero to reset to zero 
or you can set back to the previous set time by 
holding switch to ZERO for 3 seconds.

DIM POSITION FOR DISPLAY

For night operation a Dim position is provided.  
Normal position is B or bright.

CHANGING CLOCK FROM                 

24 to 12HR

 

With unit off, hold Bright/Dim switch

in 1hr up position, turn on unit. Unit is now 12HR. 
Repeat steps to switch back. 

BATTERY REMOVAL

 

We recommend to 

remove & replace CR2032 battery every 5 years.

Davtron Model 811C has an internal lithium battery before it leaves

the factory.  All three functions of the clock are activated and working.

At this time, Davtron sets the clock to accurate time (W.W.V).

The Time,  Flight Time and Elapsed Time will hold approximately  5 years

without any additional power.  No aircraft  keep-alive necessary.  

Aircraft power is required to light the display only.

This switch makes minor time 
corrections.

Position #  1  (up) is a momentary position 
and sets the clock one minute forward for 
every second held in the UP position.  After 5 
seconds, minutes speed up to 5 per second.

Position #  2  is the normal position.

Position #  3  (D) is a momentary position 
and resets seconds to zero when selected or 
held.

 

This switch sets Bright/Dim, and 
makes one hour changes.

Position #  1  (B) is the Bright position of the 
display for daytime use.

Position #  2  (Dim) is for nighttime use.

Position #  3  (1 hr. up) is a momentary 
position and sets the clock 1 hour ahead for 
every time the switch is moved to this 
position and released.

 

              

This switch selects which chan-
nel is to be displayed.

Position #  1  (Time) selects real time.  This 
channel may be set to G.M.T. time or local 
time.  Reads in hours, minutes and seconds.

Position #  2  (F.T.) selects Flight Time, reads 
in hours, minutes and seconds of actual 
flight. 

Position #  3  (E.T.) selects Elapsed Time, 
reads in hours, minutes and seconds.       

 

 
This switch controls the Elapsed 
Time meter.

Position #  1  (Zero) is a momentary position 
and resets the Elapsed Time meter to zero.  
The switch returns to position #2 when 
released.  

Position #  2  (Stop) will stop the Elapsed 
Time meter.

Position #  3  (Run) starts the Elapsed Time 
meter or Count Down Timer.

 

TENS OF

MINUTES

MINUTES

SECONDS

TENS OF

HOURS

HOURS

TENS OF

SECONDS

1

2

3

1

2

3

1

2

3

1

2

3

M O D E L 8 1 1 C   O P E R A T I O N

Download installation manual www.davtron.com product page M811C.

Reviews: