Portable Pen Type PH Meter(PH-981)

Technical data:
Measuring range: 0.00~14.00pH
Resolution: 0.01pH
Accuracy: ±0.05pH
Calibration: 1point
Working temperature: 0 to 60°C, RH≤95%
Power: 4×1.5v alkaline
Auto shut-off: Approx. 4minutes
Dimension: 168×33×20mm
Weight: 65g
 
Feature: This ph meter is pen-type model, it has the functions of high precision hold, ATC, waterproof ,precision could be 0.05pH,which suit for lab or outdoor detection.
 
 
OPERATION 
1.Remove the protective cap. Do not be alarmed. If white crystals appear around the cap. This is normal with ORP electrodes and they dissolve when rinsed with water.
2.Turn the tester ON by pressing the 'ON/OFF ' button.
3.Immerse into solution up to the max immersion level.
4.Stir gently and wait until the display stabilizes.
5.After use, Turn the tester off by pressing the  ON/OFF button, use the water clean the electrode and replace the protective cap.
 
Do not use distilled or deionized water for storage purposes.
 
Large fluctuations in readings could be due to lack of calibration, dry electrode or rundown Batteries.
 
Attention :  during 2-3 weeks, put electrodes in 3mol/L KCL solution for 12 hours, to make sure the reading within accuracy.
 
BATTERY REPLACEMENT  When the battery symbol appears on the display, this indicates a low battery and only 1 hour of continuous use remain. though the unit may continue to function ,the accuracy of the unit will be affected beyond the 1 hour twist open the battery compartment lid. remove old batteries and replace with fresh ones noting polarity as show in battery compartment.
 
ELECTRODE REPLACEMENT 
1.Remove the protective cap.
2.Unscrew the plastic ring on the top of the electrode .
3.Pull out the electrode and replace it with a new one. make sure the gaskets are in
place before screwing back the ring
 
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.