6
Fu
NCT
iONAL
D
ESC
ri
PT
iON
& LCD Di
SPLA
y
HI9813-61
pH
On/Off
mS/cm
Check
ppm
°C
CAL
pH
HI9813-61
EC
TDS
Dip probe in
CAL - CHECK
solution and
press
Dip probe in
calibration
solution and turn
the knob to match
the solution value
1
3
2
5
6
7
8
9
10
11
12
4
13
1. 8-pin DIN connector socket
2. Battery-level indicator
3. LCD display
4. On-screen calibration knob indicator
5.
pH
key – pH range selection
6.
mS/cm
key – EC range selection
7.
ppm
(mg/L) key – TDS selection
8. pH calibration knob
9. EC/TDS calibration knob
10. Temperature (
°C
) selection key
11. CAL Check key
12. On/Off key
13. On-screen tutorial messages