Hana® Microprocessor Calibration Check™ pH Meter
Includes Tris compatible pH electrode (HI1043P)
0.01pH resolution, 0.00 to 14.00 pH, 0.1mV resolution
- pH Calibration Check™ microprocessor control
- On-screen electrode condition and response time
- Up to five point calibration with seven standard buffers
- Diagnostic alerts through icons
- Automatic Temperature Compensation
- GLP features
- PC interface via USB
An electrode that is properly manufactured and kept clean will retain its measuring integrity for quite a long time. Compare the characteristics of the electrode from one calibration to the next. Alert the user that the electrode needs to be properly cleaned prior to calibration and measuring.
The most common cause for measurement inaccuracies is an unclean or improperly cleaned electrode. This is very important to note because, during calibration, the instrument assumes that the electrode is clean and that the standardization curve created during the calibration process will remain a valid reference until the next calibration.
pH meters on the market today will allow an offset of approximately ±60 mV. The deviation from 0 mV is not unusual, in fact it represents the true characteristics of the pH electrode. The deviation from 0 mV becomes a problem if it is the result of calibrating a dirty electrode.
HANNA® ' HI 221 & HI 223 compare the characteristics of the pH electrode from one calibration to the next. In case of large variances in the electrode condition that can only be the result of a soiled sensor, these meters alert the user that the electrode needs to be properly cleaned prior to calibration and measuring.
Order Information:
HI 221TRIS is supplied with HI 1043P (Tris compatible) refillable pH electrode (glass-body, BNC & Pin with 1m cable), HI 7669/2W stainless steel temperature probe, HI 76404 electrode holder, pH 4 and pH 7 buffer sachets, electrode refilling solution, 12 Vdc power adapter and instructions.
| Range | pH |
| -2.00 to 16.00 pH |
| Range | mV |
| ±699.9 mV; ±2000 mV |
| Range | Temperature |
| -20.0 to 120.0°C |
| Resolution | pH |
| 0.01 pH |
| Resolution | mV |
| 0.1 (±699.9 mV); 1 (±2000 mV) |
| Resolution | Temperature |
| 0.1°C |
| Accuracy | pH |
| ±0.01 pH |
| Accuracy | mV |
| ±0.2 mV; ±1 mV |
| Accuracy | Temperature |
| ±0.4°C |
| Calibration Check |
|
| status of electrode condition and response time,
status of the buffer solution during calibration |
| pH Calibration |
|
| automatic, up to 5 points with 7 memorized values
(pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) |
| Temperature Compensation |
|
| manual or automatic, -20.0 to -120.0°C (-4 to 248°F) |
| pH Electrode |
|
| HI 1131P, glass-body, single junction, refillable,
BNC + Pin connector, 1 m (3.3') cable (included) |
| Temperature Probe |
|
| HI 7669/2W with 1 m (3.3') cable (included) |
| PC Connection |
|
| RS232 opto-isolated serial port |
| Data Logging |
|
| 100 samples |
| Input Impedance |
|
| 10 12 Ohm |
| Power Supply |
|
| 12 Vdc adapter (included) |
| Environment |
|
| 0 to 50°C (32 to 122°F); RH max 95% |
| Dimensions |
|
| 240 x 182 x 74 mm (9.4 x 7.2 x 2.9") |
| Weight |
|
| 1.1 kg (2.4 lb.) |
CE approved.