About dispenser control - Ritter Medical

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% V_nom	6% V_nom	10% V_nom	2% V_nom	6% V_nom	10% V_nom	2% V_nom	6% V_nom	10% V_nom
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.