HT instruments HT322 - Manual (Page 6)

HT321 - HT322
EN - 5
4. OPERATING INSTRUCTIONS
4.1. INSTRUMENT DESCRIPTION
4.1.1. Front panel description
CAPTION:
1. LCD
2. HOLD Key
3. R Key
4. MAX Key
5. SEL Key
6. Backlight Key(For HT322)
7. Function selector
8. COM input terminal
9. V
 input terminal (for 321) COM
and V  °C/°F input terminal (for
HT322)
Fig. 1: Instrument description