What to do if Hanna Instruments HI 2221 Measuring Instruments do not accept the buffer solution for calibration?
If your Hanna Instruments Measuring Instruments do not accept the buffer solution for calibration, it could be due to a dirty electrode or contaminated buffer. Follow the cleaning procedure. If there are still no results, replace the electrode and the buffer.
What to do if Hanna Instruments Measuring Instruments display shows pH and -2.00 or 16.00 blinking?
If the display of your Hanna Instruments Measuring Instruments shows "pH" and "-2.00" or "16.00" blinking, it means the reading is out of range in the pH scale. To resolve this: * Verify that the electrode is connected. * Verify that the shipping cap has been removed. * Recalibrate the meter. * Make sure the pH sample is in the specified range. * Check electrolyte level and general state of the electrode.
Why do readings fluctuate up and down on Hanna Instruments HI 2221?
If the readings on your Hanna Instruments Measuring Instruments fluctuate up and down (noise), it could be due to a clogged or dirty junction, or a low electrolyte level (for refillable electrodes only). Clean the electrode. Refill with fresh solution (for refillable electrodes only). Also, check the cable and connectors.
How to fix slow response or excessive drift in Hanna Instruments HI 2221?
If you are experiencing a slow response or excessive drift with your Hanna Instruments Measuring Instruments, it is likely due to a dirty electrode. Clean the electrode and then soak the tip in HI7061 or HI8061 for 30 minutes.
What to do if Hanna Instruments Measuring Instruments do not work with the temperature probe?
If your Hanna Instruments Measuring Instruments do not work with the temperature probe, it may be due to a broken temperature probe or using the wrong temperature probe. Replace the temperature probe.
What does it mean if Hanna Instruments HI 2221 Measuring Instruments display shows mV and -2000 or 2000 blinking?
If the display of your Hanna Instruments Measuring Instruments shows "mV" and "-2000" or "2000" blinking, it indicates that the reading is out of range in the mV scale. Ensure that the electrode is properly connected.
What does "Errxx" mean on Hanna Instruments HI 2221 Measuring Instruments?
If your Hanna Instruments Measuring Instruments display an "Errxx" error message, it indicates an internal error. Power off the meter and then power it on. If the error persists, contact the vendor.
Why does Hanna Instruments HI 2221 display all LCD tags permanently at startup?
If your Hanna Instruments Measuring Instruments display all LCD tags permanently at startup, it indicates that one of the keys is stuck. Check the keyboard or contact the vendor.
General| Model | HI 2221 |
|---|---|
| Category | Measuring Instruments |
| Type | pH/ORP/Temperature Meter |
| pH Range | -2.00 to 16.00 pH |
| pH Resolution | 0.01 pH |
| pH Accuracy | ±0.01 pH |
| ORP Range | ±2000 mV |
| ORP Resolution | 1 mV |
| ORP Accuracy | ±1 mV |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.5 °C |
| Power Supply | 12 VDC adapter |
| Display | LCD |
| mV Range | ±2000 mV |
| mV Resolution | 1 mV |
| mV Accuracy | ±1 mV |
| Calibration | Up to 5 point calibration |
| pH Calibration | Up to five-point calibration with seven standard buffers available (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) |
| Temperature Compensation | Automatic or manual |
| Logging | Yes |
| Connectivity | USB |
| Input Impedance | 10¹² Ohms |
| Environment | 0 to 50°C, 95% RH |
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