Hanna Instruments hi 98140 User Manual
26
Note: to prevent damage to the electrode, remove the pH electrode
from the sample before turning the meter off.
If the meter is OFF, detach the electrode from the meter before
immersing the electrode in the storage solution.
immersing the electrode in the storage solution.
PREPARATION
Remove the protective cap.
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT.
This is normal with electrodes and they will disappear when rinsed
with water.
During transport tiny bubbles of air may form inside the glass bulb.
The electrode cannot function properly under these conditions. These
bubbles can be removed by "shaking down" the electrode as you
would do with a glass thermometer.
If the bulb and/or junction are dry, soak the electrode in HI70300
Storage Solution for at least one hour.
For refillable electrodes:
If the fill solution (electrolyte) is less than 1 cm (½") below the fill
hole, add HI7082 3,5M KCl Electrolyte Solution for double
junction or HI7071 3,5M KCl+AgCl Electrolyte Solution for single
junction electrodes.
For a faster response unscrew the fill hole screw during measurements.
For AmpHel electrodes:
If the electrode does not respond to pH changes, the battery is run
down and the electrode should be replaced.
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT.
This is normal with electrodes and they will disappear when rinsed
with water.
During transport tiny bubbles of air may form inside the glass bulb.
The electrode cannot function properly under these conditions. These
bubbles can be removed by "shaking down" the electrode as you
would do with a glass thermometer.
If the bulb and/or junction are dry, soak the electrode in HI70300
Storage Solution for at least one hour.
For refillable electrodes:
If the fill solution (electrolyte) is less than 1 cm (½") below the fill
hole, add HI7082 3,5M KCl Electrolyte Solution for double
junction or HI7071 3,5M KCl+AgCl Electrolyte Solution for single
junction electrodes.
For a faster response unscrew the fill hole screw during measurements.
For AmpHel electrodes:
If the electrode does not respond to pH changes, the battery is run
down and the electrode should be replaced.
MEASUREMENT
Rinse the electrode tip with distilled water.
Immerse the tip (4 cm /1½") in the sample and stir gently for
approx. 30 seconds.
For a faster response and to avoid cross contamination of the samples,
rinse the electrode tip with a few drops of the solution to be tested,
before taking measurements.
Immerse the tip (4 cm /1½") in the sample and stir gently for
approx. 30 seconds.
For a faster response and to avoid cross contamination of the samples,
rinse the electrode tip with a few drops of the solution to be tested,
before taking measurements.
STORAGE
To minimize clogging and ensure a quick response time, the glass
bulb and the junction should be kept moist and not allowed to dry
out.
bulb and the junction should be kept moist and not allowed to dry
out.
ELECTRODE CONDITIONING
AND MAINTENANCE