HT instruments HT2234N User Manual
Page 11
HT2234N
EN - 10
5.5.
EVENTS COUNTER WITH INTERNAL EMITTING UNIT
1. Place, if necessary, a piece of reflective tape on external surface which should be
interested by red LED and place the meter like shown in Fig. 6:
H
T2
234
N
Fig. 6: events counter with Emitting unit
2. Press ON/OFF key to turn ON the meter.
3. Press cyclically UNIT key until selecting “NO.” unit at display. On this condition the
meter shows values clear for each displays. Internal clock (with Hours and Minutes)
start the counter and AutoPowerOFF function is automatically disabled.
4. Press START key once to enable counter.
symbol is shown at display.
5. Press START key again to stop counter. "H” symbol is shown at display.
6. The result of counters and his duration is shown at display.
7. Press FUNCTION key to reset counter.
5.6.
MEASURES ON SLOW ROTATING OBJECTS
• If the rotating speed of the object on test is very slow, it is recommended that you use a
tripod to hold the tachometer in place and use multiple pieces of tape for more accurate
result.
• If multiple pieces of tape are used, each piece of tape should be located at the same
distance to each other on the object. Any number of pieces of tape are acceptable. But
you need to divide the reading by the number of pieces to obtain the correct result.
Example: 4 pieces of tape and reading is 12 rpm
Correct Speed is 12 / 4 = 3 rpm