User guide

HT2234N
EN - 4
4. INSTRUMENT DESCRIPTION
4.1. FRONT PANEL
1
7
2
4
5
6
3
11
10
9
8
HT2234N
LEGEND:
1. Reflecting tape.
2. Reflecting signal light beam.
3. Emitting / Receiving units.
4. UNIT key.
5. FUNCTION key.
6. START / STOP / HOLD key.
7. MAX/MIN/AVE symbols.
8. Low battery indication.
9. Start measure symbol.
10. Results display (bottom) and clock
display (top) for Hours:Minutes.
11. Emitting signal light beam.
Fig. 1: front panel
4.2. KEYS DESCRIPTION
• UNIT key
Press ciclycally UNIT key to select the followed units:
RPM: speed measure without contact
RPM /: speed measure with contact
m/min: meter/minute
ft/min: feet/minute
yd/min: yards/minute
R/S: frequency (Hz)
NO.: events counter with external or internal light source