HT instruments HT2234N - Manual (Page 7)

HT2234N
EN - 6
5. OPERATING INSTRUCTIONS
5.1. SPEED MEASURE WITHOUT CONTACT
1. Cut off a piece of reflective tape of size 1.0 cm x 1.4 cm (optimal size).
2. Wipe off oil or stains from the surface where reflective tape will be adhered.
3. Stick the self-adhesive reflective tape on the object whose rotational speed is to be
measured. The reflective tape should be attached as close to the outer edge of the
object to be measured as possible.
4. Press ON/OFF key to turn ON the meter.
5. Press UNIT key to select unit, RPM or R/S.
6. Aim the meter to the object on test (see Fig. 2):
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Fig. 2: speed measure without contact (RPM)
7. Press START key once and confirm that the red emitting LED lamp lights up and
aimed to reflective tape. symbol is shown at display.
8. Press START key again to stop the measure. "H” symbol is shown at display.
9. The result of test and his duration is shown at display.
CAUTION
• If the rotational speed is less than 60 rpm, it may take about 1 to 6 seconds
to measure (60 rpm takes 1 second, and 10 rpm takes 6 seconds).
• The reading will be held for 6 seconds, if you aim the photoelectric probe at
a 0 speed object right after one measurement.
• If the speed is less than 999.99 rpm, the red LED is turned on all the time to
detect speed. If the speed is great than 999.99, the unit goes into power-
saving mode. The LED is turned on for a very short period of time, then
turned off for most of the time to save power.