Sensor Maintenance; Sensor Replacement - ThermoFisher Scientific Elite pH Instrucciones De Operación

Sensor Maintenance

1. Before measuring soil pH with the pH Spear, wet your soil sample with distilled water and ensure that the soil is
free of particulates. Even though the pH Spear is ruggedized, hard surfaces such as stones and pebbles can still
cause breakage.
2. Rinse the sensor with sensor storage solution after each measurement. Care has to be taken not to damage the
sensor's glass electrode especially while rinsing the pH Spear penetrating tip electrode.
3. In aggressive chemicals, dirty or viscous solutions, and solutions with heavy metals or
proteins, take readings quickly and rinse electrode immediately afterward. For the pH Spear, the remnants of
the semi solid samples on the penetrating electrode can be removed by rubbing it with some table salt and then
rinsing. Mild detergent and warm water can be used to wash the penetrating electrode clean.
4. For best results, keep pH electrode stored upright in protective storage cap with electrode storage solution to
keep the sensor hydrated. For pH Spear, keep tip moistened in sleeve with electrode storage solution. Never
store pH and pH Spear in deionized water for extended periods. Use deionized water for rinsing only.

Sensor Replacement

You can replace the sensor module at the fraction of the cost of a new tester. When the tester fails to calibrate or
gives fluctuating readings in calibration standards, you need to change the sensor.
1. With dry hands, grip the ring with sensor facing you. Twist the ring clockwise. Save the ring for later use.
2. Pull the old sensor module away from the tester.
3. Align the four tabs on the new module so that they match the four slots on the tester.
4. Gently push the module onto the slots to sit it in position. Push the smaller O-ring fully onto the new sensor mod-
ule. Push the other O-ring over the module and thread it into place by firmly twisting counter clockwise.
Note: It is necessary that you recalibrate your tester prior to measurement after a sensor replacement.
Applications
The Elite pH tester can be used for the following:
• Aquariums
• Aquaculture
• Boilers
• Car washes
• Ecology
6
• Food sectors
• Hydroponics
• Labs
• Sanitation plants
• Spas
Insert Sensor Module
Oring ID22XCS3
Oring ID21XCS2
Sensor
Small Tab
Turn anti-clockwise to release
• Steam generators
• Studies
• Water and wastewater treatment
• Water quality testing in pools and more
Elite pH and pH Spear Tester Operating Instructions
Ring