Q Q7: What practical benefits does PROBEST’s dual-standard calibration design offer users?
AQ7: What practical benefits does PROBEST’s dual-standard calibration design offer users?
Answer: High versatility: Compatible with two mainstream commercial pH buffers on the market, more flexible for buffer purchasing and cost saving; Higher testing precision: Match calibration buffer with sample pH property to minimize measuring error; Multi-industry availability: One PROBEST pH meter meets testing needs of wastewater, food, chemical and pure water industries.
Q Q5: How should the PROBEST electrode be prepared before each calibration with a new standard buffer solution?
AQ5: How should the PROBEST electrode be prepared before each calibration with a new standard buffer solution?
Answer: Rinse electrode fully with clean water and blot residual water with lint-free tissue before next buffer calibration to avoid cross-contamination and inaccurate calibration.
Q Q4: When calibrating the 6.86, 4.0, and 9.18 standard solutions, what mV reading is considered within the normal range of PROBEST pH sensor?
AQ4: When calibrating the 6.86, 4.0, and 9.18 standard solutions, what mV reading is considered within the normal range of PROBEST pH sensor?
Answer:
pH6.86 buffer: mV reading within ±15 mV is normal;
pH4.0 buffer: Normal reading around 170 mV±20mV;
pH9.18 buffer: Normal reading around 120 mV±20mV.
Abnormal mV values mean expired buffer, dirty or damaged pH electrode.
