General Tools and Instruments DTH184DL - Manual (Page 7)

TM-184
5. Instrument description
1. Sensor Probe input(-)
2. LCD
3. Power
Button
4. Backlight/Down Button
5. Hold/Up Button
6. REL/SET/Time Button
7. MAX/Min/MEM Button
8. TMP/RH/WB/DP Button
9. REC/ / Button ℃ ℉
10. External power DC 9V
11. USB interface
12. Sensor Probe input(+)
13. Sensor Probe
14. Temperature & Humidity module
15. Temperature & Humidity sensor
4