27.
Tachometer/timer
The tachometer/timer has the following func-
tions:
1. Tachometer
•Measurement by external sensor.
•Two blade propeller specifications.
• LOW range
100 to 30,000 rpm
Error +100 rpm
•HIGH range 100 to 60,000 rpm
Error +200 rpm
2. UP TIMER
• 0 to 60 minutes with seconds displays.
3. DOWN TIMER
•60 to 0 minutes with seconds display
4. INTEGRATING TIMER
• 0 to 60 hours with minutes display
5. Battery alarm
•This alarm sounds when the transmitter nicd battery
approaches its limit.
NOMENCLATURE AND FUNCTIONS
Do not press the keys too quickly.
Press them at a speed of about once
per second.
MODE DISPLAY
•< is displayed at the mode selected at
the MODE SEL key switch.
INTEGRATING TIMER
Blinks during counting
and stops blinking when
counting stops.
UP TIMER
DOWN TIMER
TACHOMETER
[Do not expose the display to direct
sunlight for a long time
Fig. 19
MO D E SEL KEY SW —
Selects the tachometer/timer mode.
The I N T E G R A T I N G TIMER mode is selected and
is displayed when the power is turned on.
The f i r s t time this switch is pressed, the UP TIMER
mode is selected and | . is displayed.
The second time it is pressed, the DOWN TIMER
mode is selected and r
is displayed.
The third time it is pressed, the TACHOMETER
mode is selected and
is displayed.
The fourth time this switch is pressed, the
tachometer/timer returns to the INTEGRATING
TIMER mode and
is displayed.
TIME SET KEY SW
This switch sets the alarm time in the UP TIMER
and DOWN TIMER modes. One minute is set each
time this key is pressed. If it is pressed and held for
two seconds or longer, the time is set in 5 minute
steps.
A beeping signal begins 10 seconds before the dot
time. A beep is produced every minute to indicate
the lapse of time.
ENTER KEY SW——————————————————————
This switch is used for memorization, starting,
stopping, and clearing in the UP TIMER and
DOWN TIMER modes. In the INTEGRATING
TIMER mode, this switch acts as the reset switch.
POWER SW!
Tachometer/timer power switch.
8
- R E V . R A N G E SW
Switches the range when used as a
tachometer. LOW - 100 to 30,000 rpm,
HIGH - 100 to 60,000 rpm
LIQUID CRYSTAL DISPLAY
