PH-981 high precision pen PH meters PH testers

PH-981 high precision pen PH meters PH testers
Specification:

Range:0.0-14.0pH     Resolution:0.01pH

Accuracy:±0.05PH    Power:4*1.5V

Calibration:1 point  Dimension: 170*33*20mm

ATC:5-55℃           Hold Function
N.W:70g    G.W: 115g
Package: 100pcs/carton, 13.5kg/carton

OPERATION

• Remove the protective cap. Do not be alarmed if white crystals appear around the cap. This is normal with pH electrodes and they dissolve when rinsed with water.

• Turn the meter on by pressing on/off key.

• Immerse into solution up to the max immersion level.

• Stir gently and wait until the display stabilizes.

• After use, switch off pH meter, use the water clean the electrode and replace the protective cap.

• Large fluctuations in readings could be due to lack of calibration, dry electrode or rundown batteries.

CALIBRATION

• Immerse the tester up to the maximum immersion level in pH 6.86 buffer solution

• Allow the reading to stabilize and using a small screwdriver adjust the calibration trimmer to read 6.86

Calibration is now complete.

ALWAYS USE FRESH BUFFERS FOR CALIBRATION.

BATTERY REPLACEMENT

When the meter cannot be switched on or the display fades, pull out the battery compartment and replace all three 1.5V batteries, while paying attention to their polarity. Batteries should only be replaced in a safe area using the battery type specified in this instruction manual.

WARRANTY

These instruments are warranted from all defects in material and manufacturing for a period of one year from the date of purchase.

If during this period, the repair or the replacement of parts is required where the damage is not due to negligence or erroneous operation by user, please return the parts to either dealer or our offices, and the repair will be effected free of charge.