Compressed air quality Long-term stability – service-friendly – reliable „Forced Pressure Variation“ for long-term stable measurement results - auto-calibration Thanks to the innovative „forced pressure variation“ measurement method, the OIL CHECK 500 generates reference gas in different mass concentrations inside the device. This method, which is protected by CS INSTRUMENTS, compensates for ageing or contami- nation-related components in the measurement signal, in particular long-term drift. No wear parts such as activated carbon filters are required to generate zero air. The result is low-maintenance and long-term stable measurement. Service-friendly, no downtime The sensor unit can be replaced by the customer on site. This eliminates the need to return the entire device for recalibration. Process reliability All important functions/components are monitored internally - Supply voltage - Sensor voltage - Gas temperature - Internal relative humidity - Intensity of the light source relative to calibration (lamp intensity) - Increased sensor sensitivity (oil vapour resolution) Calibration The most important factor for accurate measurement is the calibration of the measuring system. The limit value specified in ISO 8573 for Class 1 is 0.01 mg/m³. This corresponds to a volume concentration of 2.5 ppb, which means 2.5 particles per billion. Table 1 - Calibration points / Calibration Support Points The high-precision, certified calibration process in the CS INSTRUMENTS laboratory enables reproducible calibrat- ion below Class 1. Calibration at 7 additional points ensures that even high residual oil measurements can be measured reliably. CS INSTRUMENTS GmbH & Co. KG Gewerbehof 14 D-24955 Harrislee Tel.: +49 (0) 461 807 150 0 Fax: +49 (0) 461 807 150 15 Web: http://www.cs-instruments.com Kalibrierzertifikat / Calibration Certificate Messergebnisse / Measuring Results Unter den genannten Bedingungen wurden bei der Kalibrierung folgende Ergebnisse erzielt: The following results were achieved during calibration under these conditions: Tabelle 1 - Kalibrierpunkte / Calibration Support Points Messwerte Measurement Values Sollwert Required Value [ppb] 0,0 1,0 2,0 4,0 8,1 16,2 32,3 64,6 129,3 258,6 517,1 Sollwert Required Value [mg/m3] 0,0000 0,0032 0,0065 0,0129 0,0259 0,0518 0,1036 0,2071 0,4143 0,8286 1,6572 Istwert Actual Value [ppb] 0,9030 1,2335 1,9090 3,8614 7,7327 16,2121 32,1878 64,7838 129,4752 258,7286 518,3607 Nr 1 2 3 4 5 6 7 8 9 10 11 Abweichung Deviation Absolut absolute [mg/m3] 0,0029 0,0007 -0,0004 -0,0006 -0,0011 0,0002 -0,0004 0,0005 0,0006 0,0005 0,0040 Istwert Actual Value [mg/m3] 0,0029 0,0040 0,0061 0,0124 0,0248 0,0520 0,1032 0,2076 0,4149 0,8291 1,6612 Im Bereich In Range ISO Class I I I II II II III III III III IV Zulässig Permissible +/- [mg/m3] 0,0030 0,0050 0,0050 0,0050 0,0050 0,0052 0,0103 0,0208 0,0415 0,0829 0,1661 Ergebnis: Die Gegenprobe aller Kalibrierpunkte war innerhalb der angegebenen Spezifikation. Result: The cross-check of all calibration points was within the stated specification. www.cs-instruments.com Datum / Date Leiter Produktion / Head of Production Tobias Zürcher Bearbeiter / Person in Charge Manuel Auer 149