User Manual

9
11 Other Specifications
Screen
3-color LCD screen,
Blue: Measurement; Green: Calibration; Red: Alarm
Reading Lock
HOLD
Low-Voltage Warning
flashing, reminder of battery replacement needed
Auto. Power-Off
In 8 minutes without operation
Waterproof Rating
IP67
Power
DC3V, AAA alkaline batteries×4
Battery Life
Operation up to 2000 hours
Dimension& weight
Tester: 40×40×178mm/133g; Case: 255×210×50mm/700g;
12 Probe Replacement
12.1 Every pH probe gradually loses its sensitivity and will eventually fail. A typical service life of a pH probe
is 1-2 years depending on many factors such as frequency of use, nature of test samples, and how well
it is maintained, etc. Apera Instruments recommends replacing the pH probe every 1 to 2 years to
guarantee the optimal performance.
12.2 To replace a probe: 1) Take off the probe cap; 2) Screw off the probe
ring 3) Unplug the probe; 4) Plug in the new replacement probe (pay
attention to the probe’s position); 5) Screw on the probe ring tightly.
Soak the probe in 3M KCL for 5-15 minutes. Then perform calibration
before testing.
12.3 The replacement probes compatible with PH60:
• AI1201 PH60-E (Regular pH glass bulb probe for general water solutions)
• AI3711-E PH60-DE (Double-junction pH glass bulb probe for complex solutions)
• AI1205 PH60S-E (Spear pH probe for soft-solids pH testing)
• AI1203 PH60F-E (Flat pH probe for surface pH testing)
• AI1207 ORP60-E (ORP probe)