| Specifications |
| Model |
Orion 4-Star Plus pH/ISE Portable Multiparameter Meter |
| pH Mode |
| Range |
-2.000 to +19.999pH |
| Resolution |
0.1/0.01/0.001pH |
| Relative Accuracy |
±0.002pH |
| Calibration Points |
AUTO-CAL* and/or Manual Calibration; 1 to 5 points; US/NIST, DIN, and custom buffers recognized |
| ISE Mode |
| Range |
0 to 19,999 in M, mg/L, %, ppb, or no units |
| Resolution |
1, 2, or 3 signi?cant digits |
| Relative Accuracy |
±0.2mV or 0.05%, whichever is greater |
| Calibration Poin |
1 to 5 points; linear point to point, non-linear selectable auto-blank, low concentration range options |
| mV/RmV/ORP Mode |
| Range |
±1999.9mV |
| Resolution |
0.1mV |
| Relative Accuracy |
±0.2mV or 0.05%, whichever is greater |
| ORP Calibration |
EH autocalibration to standard hydrogen electrode for ORP measurements |
| Temperature Mode |
| Range |
-5° to +105°C |
| Resolution |
0.1°C up to 99.9°C, 1.0°C over 99.9°C |
| Relative Accuracy |
±0.1°C, ±1 digit |
| Temperature Compensation |
Automatic or manual |
| Display |
Custom LCD; simultaneous display of selected measurement and temperature, pH calibration points, and current electrode condition |
| Inputs/Outputs |
| Inputs |
Waterproof BNC for pH/ORP/ISE electrodes; waterproof 8-Pin Mini-DIN Locking for ATC probe; Pin tip for separate reference electrode; Phono jack for stirrer |
| Sensor Types |
pH, ORP or Ion Selective electrodes |
| Outputs |
Waterproof bidirectional RS-232, stereo jack, optional USB interface cable |
| Data Management |
GLP Electrode Veri?cationSaves 750 points by time, stability or manual read with time/date stampCalibration log of last 10 calibrationsUser method storage for 10 proceduresAdvanced self-test and diagnostics routinesPassword protectionDownloadable software and methods updates via Internet |
| GLP Compliance |
21 CFR Part II Compliant with optional software |
| Regulatory and Safety Compliance |
CE, CSA, UL, TUV, FCC Class A limits |
| Environmental Operating Conditions |
| Ambient Operating Temperature |
5° to 45°C |
| Relative Humidity |
5 to 85% noncondensing |
| IP Rating |
IP54 compliance: splashproof and dustprooIP67 waterproof |
| Stability |
SMART STABILITY* and SMART AVERAGING* Resolution dependent/automatic |
| Power Supply |
4 x 1.5V AA batteries |
| Warranty |
Three years from date of purchase |
