| Specifications |
| Model |
Orion 4-Star Plus pH/DO Benchtop Multiparameter Meter |
| pH Mode |
| Range |
-2.000 to +19.999pH |
| Resolution |
0.1/0.01/0.001pH |
| Relative Accuracy |
±0.002pH |
| Calibration |
AUTO-CAL* and/or Manual Calibration; 1 to 5 points; US/NIST, DIN, and custom buffers recognized |
| mV/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 |
| DO Mode |
| Concentration Range |
0.00 to 90.00mg/L |
| Concentration Resolution |
0.1/0.01mg/L |
| Relative Accuracy |
±0.2 mg/L |
| % Saturation Range |
0.0 to 600% |
| % Saturation Resolution |
0.1% |
| Relative Accuracy |
±2% |
| Salinity Factor |
0 to 45 ppt |
| Barometric Pressure Compensation |
450–850mmHg |
| Calibration |
Auto Calibration or Manual Input; water-saturated air and air-saturated water, Winkler Titration for BOD |
| 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°, ± 1 digit |
| Temperature Compensation |
DO, auto; pH, auto/manual -5° to +105°C |
| Display |
Custom LCD; simultaneous display of selected measurement and temperature, pH calibration points, and current electrode condition |
| Inputs/Outputs |
| Inputs |
BNC for pH/ORP electrodes; 9-Pin Mini-DIN Locking for DO; 8-Pin Mini-DIN Locking for ATC probe; Pin tip for separate reference electrode; Phono jack for stirrer |
| Sensor Types |
Polarographic DO probe; pH/ORP electrode |
| Outputs |
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 |
| 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 dustproof |
| Stability |
SMART STABILITY* and SMART AVERAGING*: Resolution dependent/automatic |
| Power Supply |
Universal AC power adapter or 4 x 1.5V AA batteries (optional) |
| Warranty |
Three years from date of purchase |
