About dispenser control

According to DIN EN ISO 8655, dispensers have to be controlled minimum once per year. Therefore, you can send your devices including a calibration order to Ritter Medical. We are glad to take care about the inspection of your or your customer‘ s dispenser.

Nevertheless, we will leave the decision about the inspection of your devices up to you. No matter if you would like to make the calibration of your dispenser in-house or by yourself, please follow the detailed instruction of DIN EN ISO 8655-1/7.3. The enclosed chart provides the necessary technical data for a successful calibration.

Tip size Dispensed volume in μl  Measurement deviation determined by the system in %  Incidental measurement deviation in %
 2% Vnom 6% Vnom  10% Vnom 2% Vnom 6% Vnom  10% Vnom  2% Vnom 6% Vnom  10% Vnom
0.05 ml 1 3 5 ± 6 ± 4 ± 4 ≤ 9.0 ≤ 5.0 ≤ 4.0
0.10 ml 2 6 10 ± 2.5 ± 2 ± 1.5 ≤ 4.5 ≤ 4.5 ≤ 2.0
0.20 ml 4 12 20 ± 1.6 ± 1.6 ± 1 ≤ 1.9 ≤ 1.2 ≤ 1.0
0.50 ml 10 30 50 ± 1 ± 1 ± 1 ≤ 1.5 ≤ 1.2 ≤ 0.8
1.00 ml 20 60 100 ± 1 ± 1 ± 1 ≤ 1.3 ≤ 1.2 ≤ 0.9
1.25 ml 25 75 125 ± 0.9 ± 0.9 ± 0.9 ≤ 0.9 ≤ 0.7 ≤ 0.6
2.50 ml 50 150 250 ± 0.7 ± 0.7 ± 0.7 ≤ 0.9 ≤ 0.7 ≤ 0.6
5.00 ml 100 300 500 ± 0.3 ± 0.3 ± 0.3 ≤ 0.8 ≤ 0.6 ≤ 0.4
10.00 ml 200 600 1000 ± 0.3 ± 0.3 ± 0.3 ≤ 0.8 ≤ 0.6 ≤ 0.4
12.50 ml 250 750 1250 ± 0.3 ± 0.3 ± 0.3 ≤ 0.5 ≤ 0.5 ≤ 0.4
25.00 ml 500 1500 2500 ± 0.5 ± 0.5 ± 0.5 ≤ 0.6 ≤ 0.4 ≤ 0.3
50.00 ml 1000 3000 5000  ± 0.5 ± 0.5 ± 0.5 ≤ 0.6 ≤ 0.5 ≤ 0.3

The data for Ritips® 0.05 ml in the chart are based on a measurement with a 10 μl pipette tip attached. Measurement according to DIN EN ISO 8655 with Ripette ® pro.

Liquid: bidistilled water
Reference temperature: approx. 20 °C

The Ripettes are suited for a temperature range from + 15 °C to + 40 °C.