. Maintenance
5.1 Meter maintenance
Never unscrew the two halves of the housing!
The Five series instruments do not require any maintenance other than occasional wipe with a dampcloth and the replacement of depleted batteries (FG2).
The housing is made of acrylonitrile butadiene styrene/polycarbonate (ABS/PC). This material is attackedby some organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any spillage should be immediately wiped off.
5.2 Electrode maintenance
Make sure the electrode is filled with electrolyte solution if applicable.For maximum accuracy, any filling solution that may have "crept" and encrusted the outside of the electrode should be removed with deionized water.Always store the electrode according to the manufacturer’s instructions and do not allow it to dry out. If the electrode slope falls rapidly, or if the response becomes sluggish, the following procedures may help. Try one of the following, depending the samples usually measured.
1. For fat or oil build-up, degrease the membrane with cotton wool soaked in either acetone or a soap solution.
2. If the sensor membrane has dried out, soak the tip of the electrode in 0.1 M HCl overnight.
3. If a protein build-up has occurred in the diaphragm, remove deposits by soaking the electrode in an HCl /pepsin solution (51340068).
4. If a silver sulfide contamination has occurred, remove deposits by soaking the electrode in a solutionof thiourea (51340070). After treatment a new calibration should be performed.
Note: Cleaning and filling solutions should be handled with the same care as that given to toxic or corrosive substances.
. Maintenance5.1 Meter maintenanceNever unscrew the two halves of the housing!The Five series instruments do not require any maintenance other than occasional wipe with a dampcloth and the replacement of depleted batteries (FG2).The housing is made of acrylonitrile butadiene styrene/polycarbonate (ABS/PC). This material is attackedby some organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any spillage should be immediately wiped off.5.2 Electrode maintenanceMake sure the electrode is filled with electrolyte solution if applicable.For maximum accuracy, any filling solution that may have "crept" and encrusted the outside of the electrode should be removed with deionized water.Always store the electrode according to the manufacturer’s instructions and do not allow it to dry out. If the electrode slope falls rapidly, or if the response becomes sluggish, the following procedures may help. Try one of the following, depending the samples usually measured.1. For fat or oil build-up, degrease the membrane with cotton wool soaked in either acetone or a soap solution.2. If the sensor membrane has dried out, soak the tip of the electrode in 0.1 M HCl overnight.3. If a protein build-up has occurred in the diaphragm, remove deposits by soaking the electrode in an HCl /pepsin solution (51340068).4. If a silver sulfide contamination has occurred, remove deposits by soaking the electrode in a solutionof thiourea (51340070). After treatment a new calibration should be performed.หมายเหตุ: ทำความสะอาด และบรรจุการแก้ไขปัญหาควรจัดการกับการดูแลเหมือนเป็นที่ให้สารที่เป็นพิษ หรือกัดกร่อน
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