Operation manual for Transinstruments RBX4582 and RBX5890 hand‑held refractometers, covering layout, calibration, measurement and usage precautions.
This operation manual provides the product layout specifications, calibration procedure, measurement steps, and handling precautions for the Transinstruments RBX4582 and RBX5890 hand‑held refractometers.
The guide details how to calibrate the instrument using the supplied glass block and calibration fluid, how to perform measurements, and the necessary care to maintain accuracy and longevity of the device.
| Measuring Range | 45 ~ 82% (RBX4582), 58 ~ 90% (RBX5890) |
|---|---|
| Display Resolution | 0.5% (RBX4582), 0.2% (RBX5890) |
| Temperature Compensation | Automatic from 10 to 30 °C |
| Calibration Point | 78.8% Sucrose Solution |
Calibrate in an ambient environment of 20 °C, place a drop of calibration fluid on the prism, use the glass block, wait 30 seconds for temperature compensation, then adjust the focus and calibration knob until the scale reads the calibration point.
Open the light plate, place 2‑3 drops of the test liquid on the prism, close the plate, wait 30 seconds, look through the eyepiece, select the scale, and read the value where the dark blue and white areas meet.
Keep the instrument clean and dry, avoid abrasive or corrosive chemicals, never immerse it in water, and store it in a cool, dry environment to ensure reliable service.