Xylem CG 853P - Manual (Page 59)

Operation
135
12 With < ▲ > < ▼ > select between t25 and t20
.
13 Confirm with <run/enter>. LF appears on the display.
14 With < ▲ > < ▼ > select between S/cm and M
Ω.
15 Confirm with <run/enter>.
USE °C appears on the display.
16 Select between °C and °F by pressing < ▲ > < ▼ >.
17 Confirm with <run/enter>.
The date flashes on the display.
Reference
temperature
Conductivity
Temperature unit