2.5
Spear pH Electrode is suitable for measure wet solid or semi-solid medium When piercing sample
medium, do not use excessive force. If the sample medium is too hard (such as meat), please cut a
small hole before piercing the electrode into it.
2.6
After 1-year of use, we recommend replacing the electrode for the best accuracy.
2. How to Test Soil pH Directly
a)
If soil is dry, add small amount of distilled or RO water to moisten the soil (
do NOT add tap
water since it will affect the pH value significantly
). Ideally wait 24 hours before you take a
measurement.
b)
Insert the pH connector (blue one) to the pH socket, and twist it clockwise to lock in; Insert the
temperature connector to the temperature socket.
c)
Rinse the probe with distilled water/RO water before inserting it to the soil.
d)
If measuring outside of solution, rockwool or small pots, remove the top 5cm/2inch soil from the
surface of the sample area.
Insert the probe approximately 4 to 6 inches (10 to 15cm) into the
soil samples from various locations (3 to 4)
, wait for the stable readings before recording (smiley
face icon stays on the screen).
e)
Users can press the M+ button to save the stable readings on the meter.
Then take the average
of the measured data as the representative pH level of the sample area.
f)
Do
NOT
use extra force to insert probe. If you feel like the probe can’t be inserted any deeper,
stop inserting. The spear tip could break.
g)
Rinse off the soil residue between tests using distilled water for the best results. Use the probe
cleaning brush in the case if needed.
h)
Performing calibration of the meter at least every two weeks to ensure accuracy. Refer to section
3.2 for calibration process.
i)
The connector of the electrode should be kept clean and dry. If contaminated, please clean it with
medical cotton and absolute alcohol and blow dry to prevent the short circuit of the electrode and
slow reaction of electrode.
j)
After 1-year of use, we recommend replacing the electrode for the best accuracy.
3. Limited Warranty
We warrant this electrode to be free from defects in material and workmanship and agree to repair or
replace free of charge, at option of APERA INSTRUMENTS, LLC, any malfunctioned or damaged
product attributable to responsibility of APERA INSTRUMENTS, LLC for a period of SIX MONTHS
from the delivery.
This limited warranty does not cover any damages due to:
Transportation, storage, improper use, failure to follow the product instructions or to perform any
preventive maintenance, modifications, combination or use with any products, materials, processes,
systems or other matter not provided or authorized in writing by us, unauthorized repair, normal wear and
tear, or external causes such as accidents, abuse, or other actions or events beyond our reasonable control.
APERA INSTRUMENTS, LLC
Address: 6656 Busch Blvd, Columbus, OH 43229 Phone: 1-614-285-3080
Website:
Email: [email protected]
