MB801 OPERATION
Specifications
3.520
.750
.100
4.350
3.030
1.100
YELLOW/Alarm
BLUE/ 10-33VDC Power
White/Int. Lighting 28V
BLACK/Ground
427 Hillcrest Way, Redwood City, CA 94062
Phone (866)369-5588 •Fax (650)369-9988
www.davtron.com
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Normal Operation
The SELECT button selects what is to be displayed on
the four digit window and the CONTROL button controls
what is being displayed. Pressing SELECT sequentially
selects UT, Local Time, Elapsed Time and then back to
UT. The Control button starts and resets Elapsed Time
when momentarily pushed. Normal operation of the
MB801 cannot accidentally reset time.
Setting UT (Universal Time)
Select UT for display in the four digit window with the
SELECT 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 exists the
mode.The lighted annunciator will resume its normal
flashing, indicating the UT clock is running.
Setting LT (Local Time)
Select Local Time, LT, using the SELECT button.
Simultaneously push the SELECT and CONTROL
buttons to enter set mode.The tens of hours digit will
start flashing. The set operation is the same as for UT,
except that minutes are already synchronized with the UT
clock .
Test Mode
In UT mode hold the SELECT button down for five
seconds and the display will indicate 88:88 and activate
all three annunciators.
Elapsed Time Count Up
Select ET for display. Pressing the CONTROL 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 CONTROL button again resets ET to zero.
Elapsed Time Count Down
Select ET for display and enter set mode by pressing
both buttons.The countdown timer can now be set.
Entering the time is identical to UT 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 CONTROL button starts the countdown.
When the count reaches zero the display flashes and the
external alarm is activated. Pressing either SELECT or
CONTROL will deactivate the alarm. ET continues
counting up. Pressing CONTROL again will reset ET to
zero.
• Universal 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 28V.
• NVIS Lighting: Option Green A.
• Keep Alive Current: .004 Amps, 28V.
• Voltage: 28V.
• Warranty: 1 year.
