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General| Range pH mg/L µS/cm °C | 0.0 to 14.0 0 to 3000 0 to 6000 0.0 to 70.0 (HI 9811-5 only) |
|---|---|
| Resolution pH mg/L µS/cm °C | 0.1 10 10 0.1 (HI 9811-5 only) |
| Accuracy pH (@20°C/68°F) mg/L µS/cm °C | ±0.1 ±2% f.s. ±2% f.s. ±0.5 (HI 9811-5 only) |
| Conversion Factor | 0.5 |
| Typical EMC pH Deviation mg/L µS/cm °C | ±0.1 ±2% f.s. ±2% f.s. ±0.5 (HI 9811-5 only) |
| pH Calibration | Manual, 1-point through offset trimmer |
| EC/TDS Calibration | Manual, 1-point through slope trimmer |
| EC/TDS Temperature Compensation | Automatic from 0 to 50°C (32 to 122°F) with ß = 2%/°C |
| Probe (included) | HI 1285-0 for HI 9811 HI 1285-5 for HI 9811-5 |
| Battery Type | 1 x 9V alkaline (IEC 6LR61) |
| Life | approx. 150 hours of continuous use |
| Environment | 0 to 50°C (32 to 122°F); 100% RH |
Weight and Dimensions| Dimensions | 165 x 75 x 45 mm (6.5 x 3.0 x 1.8") |
|---|---|
| Weight | 250 g (8.8 oz.) |
Steps for battery installation, probe connection, and powering on the meter.
Instructions for taking pH readings, including probe preparation and stabilization.
Guidance on measuring conductivity and TDS, including temperature compensation.
Procedure for measuring temperature using the HI 9811-5 model.
Details on buffer solutions and preparation needed for pH calibration.
Step-by-step guide to calibrate the pH measurement function.
Chart showing pH buffer values at various temperatures for accurate calibration.
Instructions for calibrating the EC and TDS measurement functions.
Explanation of the fixed conversion factor used between EC and TDS measurements.
Guidelines for inspecting the probe and cable for damage and cleanliness.
Recommended method for cleaning the probe to ensure measurement accuracy.
Important advice for safe and effective use, including environmental and electrical precautions.
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