M811B

2.375
TYP. 2.4 D I G I TA L C L O C K
FLIGHT TIME RECORDER
1.875
TYP. 2.238 811B ELAPSED TIME METER
OPTION NVG GREEN A

2.8
Mounting Hardware .080
4-40 3⁄8 Maximum Length SIDE VIEW

*Recommend grounded soldering iron on unit installation.

Six-digit display on all three functions Incandescent Displays: Readable in Sunlight

Local Time: 12 hour or 24 hour option Input Voltage: 14 Volts
(user selectable) Input Current: 0.4 Amps
Flight Time: 24 hour Maximum depth from mounting surface: 2.8”
Elapsed Time Count Up: 24 hour Black Faceplate: Engraved Nomenclature
Battery supplied with a typical two year Grey Faceplate: Silkscreened Nomenclature
operating life. 6 volts - 1 Amp hour Weight: 7.5 ounces
Polaroid filter Warranty: 1 year
FAA - PMA Approved
 This switch makes minor time This switch sets Bright/Dim, and
M O D E L 8 1 1 O P E R AT I O N corrections makes one hour changes
1 Position #1 (up) is a momentary 1 Position #1 (B) is the Bright posi-
Davtron attaches a welded tab-type battery to the 811 clock before it leaves the position and sets the clock one minute tion of the display for daytime use.
factory. All three functions of the clock are activated and working. At this time, forward for every second held in the up
Davtron sets the clock function to accurate time (W.W.V.). The Clock, the Flight position. After 5 seconds, minutes 2 Position #2 (Dim) is for night time
Time, and the Elapse Time will work approximately two years without any addi- speed up to 5 per second. use.
tional power. No aircraft keep-alive voltage necessary. Aircraft power is
2 Position #2 is the normal position. 3 Position #3 (1 hr. up) is a momen-
required to light the display only.
3 Position #3 (D) is a momentary tary position and sets the clock 1 hour
DISPLAY SELECT seconds. This recorder is fully con- position and resets seconds to zero ahead for every time the switch is
The switch marked Time/F.T./E.T. is a trolled by the pilot from the front when selected or held. moved to this position and released.
three position switch that selects the panel. It may be started, stopped,
function to be displayed. All three and returned to zero for elapsed
functions operate normally no matter time, approach, time, etc. It contin- 1 2 3
what function has been selected for ues to operate when aircraft power

↑ ↑
display. is off. Totals time up to 24 hours. 1 2 3
DIM POSITION FOR DISPLAY

↑ ↑
TIME
When the time function is selected, For night operation a Dim position is
the proper time will read in hours, provided. Normal position is B or
bright.
minutes, and seconds. The time chan-
nel may be set to local time or G.M.T. SETTING TO ACCURATE TIME TENS OF
TENS OF
time. Davtron sets the clock to the correct MINUTES
GMT time when it leaves the factory. HOURS
FLIGHT TIME RECORDER To change hour, push Dim/Bright
When the Flight Time channel is switch to 1hr up position. Each HOURS
selected, the actual time in flight will press or just holding it in the 1hr up MINUTES
be displayed in hours, minutes, and position will increase time by one
hour. This setting does not effect the TENS OF
seconds. The Flight Time channel is
controlled by applying a voltage to the minutes or seconds. SECONDS SECONDS
Blue Control Lead of the clock. This is The switch marked Set is for chang-
ing minutes or seconds. When you
recommended to be operated from an hold set switch in UP mode, minutes
air switch. When the aircraft starts its will count one per second until 5
take-off run and the airswitch closes, seconds elapse, then minutes speed
the Flight Time recorder will start to up to 5 minutes per second. When
run, recording Flight Time. Anytime you hold set switch in the D, down 1 1
during flight the pilot may check total
time in flight. When the aircraft has
position, the seconds reset to zero.
During the time the clock is being ↑
↑ 2 2
↑
↑
landed, the pilot can record total set up or down, the Elapsed Time
Flight Time. The Flight Time can be and Flight Time still continue to
operate normally. The Set switch is a 3 3
zeroed only by having aircraft power momentary switch and automatically
off and moving the switch on the front returns to the center position.
panel to the zero position. * The pilot This switch selects which This switch controls the
can have total flight time on a trip with CHANGING CLOCK FROM channel is to be displayed Elapsed Time meter
a number of stops if he avoids return- 24 TO 12 HR
With unit off, hold Bright/Dim switch 1 Position #1 (Time) selects real 1 Position #1 (Zero) is a momentary
ing the Flight Time recorder to zero.
in 1hr up position, turn on unit. Unit is time. This channel may be set to position and sets the Elapsed Time
The Flight Time recorder will total now 12HR. Repeat steps to switch back. G.M.T. time or local time. Reads in meter to zero. The switch returns to
time up to 24 hours. Normally it is
CHANGING FROM NON-FTR TO FTR hours, minutes and seconds. position #2 when released. NOTE:
recommended that the Flight Time
recorder be zeroed on the pre start * If you want to be able to zero flight Position #1 will zero Flight Time only if
time without turning off clock follow 2 Position #2 (F.T.) selects Flight power to the clock is off. (Standard
up check list of the aircraft.
these steps. 1. With power off, put Time, reads in hours, minutes and sec- Setting)
ELAPSED TIME METER clock in FT mode, hold Stop/Zero onds of actual flight. 2 Position #2 (Stop) will stop the
When the Elapsed Time channel is switch in Zero position while power-
ing up unit. You can now reset FT 3 Position #3 (E.T.) selects Elapsed Elapsed Time meter.
selected the Elapsed Time meter
w i l l r e a d i n h o u r s, m i nu t e s, a n d with clock powered up in FT mode. Time, reads in hours, minutes and sec- 3 Position #3 (Run) starts the
Same steps will switch it back. Elapsed Time meter.
onds.