Hanna Instruments HI 9828 Instruction Manual

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Hanna Instruments HI 9828 Instruction Manual Manual pdf 57 page image

59APPENDIX A - PROBE MAINTENANCEHI9828HI9828HI9828HI9828HI9828 is supplied complete with a probe maintenance kit that includesHI7042SHI7042SHI7042SHI7042SHI7042S (electrolyte solution for DO sensor), 5 spare membranes with O-rings for DO sensor, a small brush for cleaning EC and DO sensors, 5 O-ringsfor sensor connectors and a syringe with grease to lubricate these O-rings.General MaintenanceAfter use rinse the probe with tap water and dry it. The pH electrode bulb must bekept moist. Dry the DO and EC sensors.Maintenance of DO SensorFor a top performance probe, it is recommended to replace the membrane every2 months and the electrolyte monthly.Proceed as follows:• Unscrew the membrane by turning it counterclockwise.• Rinse a spare membrane with some electrolyte whileshaking it gently. Refill with clean electrolyte.• Gently tap the membrane over a surface to ensure that no air bubblesremain trapped.• With the sensor facing down, completely screw the cap clockwise. Someelectrolyte will overflow.If any deposit scales the sensor, gently brush the sensor surface with the suppliedbrush, while paying attention to not damage the plastic body.Maintenance of pH Probe• Remove the electrode protective cap. Do not be alarmed if any salt deposits arepresent. This is normal with pH electrodes and they will disappear when rinsedwith water.••••• Shake down the electrode as you would do with a clinical thermometer toeliminate any air bubbles inside the glass bulb.••••• If the bulb and/or junction are dry, soak the electrode in HI70300HI70300HI70300HI70300HI70300 storagesolution for at least one hour.••••• To minimize clogging and ensure a quick response time, the glass bulb and thejunction should be kept always moist and not allowed to dry.••••• Store the electrode with a few drops of HI70300HI70300HI70300HI70300HI70300 storage solution in the protectivecap. Tap water may also be used for a very short period (couple of days).NEVER USE DISTILLED OR DEIONIZED WATER TO STORE THENEVER USE DISTILLED OR DEIONIZED WATER TO STORE THENEVER USE DISTILLED OR DEIONIZED WATER TO STORE THENEVER USE DISTILLED OR DEIONIZED WATER TO STORE THENEVER USE DISTILLED OR DEIONIZED WATER TO STORE THEpH ELECTRODE.pH ELECTRODE.pH ELECTRODE.pH ELECTRODE.pH ELECTRODE.