Davtron M803 - User Manual

NOTE: Keep Alive (Pin 9) is only required if alkaline AA size battery is removed. Flight Time starts with either
Pin 3 or Pin 4 – use only one pin.
SPECIFICATIONS
n
Greenwich Mean Time: 24 hour format.
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Local Time: 12 hour format.
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Flight Time: Records in 99:59 standard.
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Flight Time Alarm: Full set range flight time.
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Elapsed Time Count Up: Starts in minutes,
seconds, then hours, minutes up to 99:59 hrs.
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Elapsed Time Count Down: Settable from
one second to 59 minutes, 59 seconds.
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Elapsed Time Alarm: Activates at zero
when counting down.
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LCD Display
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Battery Type: AA size alkaline.
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Keep Alive Current: .00004 Amps.
n
Input Current: .2 Amps.
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Input Voltage: 11 to 28 volts.
n
Voltage Range: 8 volts to 32 volts ±.2 volts Typ.
-55°C to +100°C ±2°C Typ.
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Temperature Range: -67°F to +212°F.
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Crystal Reference: -40C to + 60C .001%.
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Weight: 5.02 ounces.
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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 5V (240ma), 14V (240ma) or 28V (100ma) lighting
4V to 28V Starts Flight Time
Temperature Sensor (White)
14 to 28 Volts, 2A
Temperature Sensor (White/Blue Stripe)
GND
Audio Alarm
.25A
Battery
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2.10
1.375
2.83
1.675
.080
M803
Alkaline “AA” Battery
Locking Connector
Positronics MD9F-20J-VL
1.875
TYP.
2.22
2.375
TYP.
Mounting Hardware 4-40x
3
/8
DIGITAL CLOCK
M803
LCD Display
GREENWICH MEAN TIME
LOCAL TIME
FLIGHT TIME - Flight Time Alarm
ELAPSED TIME - Count Up, Count Down, Alarm
FEATURES - O.A.T. / VOLTS
ß
ONE button control steps sequentially through
E, F, C:
E - Voltage
F - O.A.T. Fahrenheit
C - O.A.T. Centigrade
ß
Always selects to read voltage on power up for
battery status check.
ß
Input voltage - 11 to 28 volts.
ß
Internal lighting 5v,14v or 28v specify when
ordering.
ß
2.25” standard mount - wt. 5.02 oz.

Summary

MECHANICAL AND ELECTRICAL LAYOUT

Unit Dimensions and Mounting

Displays physical dimensions, mounting hardware, and connector details for the unit.

Electrical Connection Diagram

Illustrates the pinout for various functions including alarm, lighting, and timekeeping inputs.

DIGITAL CLOCK SPECIFICATIONS

Timekeeping Features

Details formats for Greenwich Mean Time, Local Time, Flight Time, and Elapsed Time.

Performance and Physical Data

Covers battery type, voltage, current input, temperature range, and unit weight.

O.A.T.; Volts Features

Highlights mode selection and automatic voltage display for battery status checks.

CLOCK OPERATION AND SETTINGS

Normal Operation and Display

Explains how to select and display different time modes (UT, LT, FT, ET).

Setting Time Modes

Details procedures for setting Universal Time, Local Time, and Flight Time Alarm.

Elapsed Time Functions

Covers Count Up, Count Down, and alarm activation for Elapsed Time.

Reset, Test, and Sensor Modes

Describes resetting Flight Time, entering Test Mode, and O.A.T./Volts operations.

Davtron M803 Specifications

General

Type	Digital Clock
Display	LED
Time Format	12/24 Hour
Mounting	Panel Mount
Dimensions	2.25 x 2.25
Display Digits	6 Digits