Particulate measurement as part of the main inspection for Euro 6/VI vehicles with compression ignition engines will come into force on January 1, 2023. The counting of soot particles as an integral part of the exhaust emission test of diesel passenger cars. This is associated with specific requirements for the calibration process and conformity assessment for particle counting devices, according to the AU device calibration guideline [VkBl. 11/2021-No. 131]. In addition, VkBl. 24/2020-No. 190 requires the calibration of exhaust gas measuring devices by a service provider accredited according to DIN EN ISO/IEC 17025. We offer you a market-ready reference calibrator that meets these requirements.
The Knestel PN Reference Calibrator can be used to calibrate PN instruments of all types on site. It combines a highly stable salt generator and a reference particle counter in a portable housing.
For more technical key data, download our factsheet:
Here you can download the user manual for the device and find answers to frequently asked questions.
| No power supply | Check voltage supply |
| Power switch off | Switch on power supply |
| Power supply unit defective | Manufacturer service |
| Temperature too low (blue thermometer is displayed) | Temperature adjustment within specified operating temperature |
| “Self test error” | Contact Knestel for latest Software Updates |
| No NaCl solution available | Refill NaCl solution and screw it |
| Blocked nozzle | Cleaning the Nozzle according to 7.7.1 |
| Generator does not start | Check whether the solution in the NaCl container is “bubbling”. If not, restart the device, check whether the measuring mode is active. |
| Nozzle of the salt particle generator clogged | Perform flushing function repeatedly
Clean nozzle as in next chapter Clean (ultrasonic bath) or replace the nozzle of the salt particle generator. Perform the rinsing function after each use! |
| Leakage | Check for leakage at the hoses and at the silica container. |
| Check NaCl solution, Check tightness of screw bottle, Check tightness of hose lines and silica container |
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| No/wrong NaCl solution present | Check NaCl solution, refill and screw in. |
| High humidity, condensing atmosphere | Perform temperature adaption prior to operation
Assure no condensing conditions Let device operate at any concentration as long as required to reach the correct particle size Contact Knestel for latest product updates |
| Rinsing function was not used at last operation | Perform rinsing function according to 6.2.7 |
| Indication for Software issue | Contact Knestel for latest Software Updates |
The PNR 1000 K is a portable device from KNESTEL that combines a stable salt (NaCl) aerosol generator with a reference particle counter. It is designed to calibrate PN (particle number) measurement devices of all types on site.
From 1 January 2023, under EU rules for Euro 5b/Vb and Euro 6/VI vehicles with compression ignition engines, exhaust emission tests (HU / AU) include the counting of soot / particles. The calibration process and conformity assessment of particle counting devices must meet specific guidelines, including the AU device calibration guideline [VkBl 11/2021‑No. 131] and accreditation under DIN EN ISO/IEC 17025. The PNR 1000K is built to satisfy these requirements.
The main advantages / capabilities include:
Ability to calibrate multiple PN devices simultaneously.
Robust transport case with space for additional equipment.
Traceability according to EN 17025.
Built‑in self‑test function (without generating particles).
Monitoring of average (mean) particle size.
Use of a particle counter without hazardous materials or costly consumables.
Aerosol generation via a low‑cost saline (NaCl) solution.
Low maintenance due to non‑contact measurement technology and a so‑called Clean Charging Technology.
Calibration of exhaust gas particle measurement devices (PN devices).
Initial calibration in laboratory settings.
Field calibration in vehicle workshops.
Use as a test and calibration tool during repairs.
AU‑device calibration guideline [VkBl. 11/2021‑No. 131] for calibration of particle counting devices.
Requirement of VkBl. 24/2020‑No. 190 for calibration by a service provider accredited according to DIN EN ISO/IEC 17025.
Maintenance is relatively low, but some tasks are needed to ensure proper operation:
Regular cleaning or flushing of the NaCl generator nozzle.
Checking for leaks in hoses, containers or connections.
Replacing or recharging desiccant (silica gel) when required (from the manual).
Ensuring that the NaCl solution is correct and clean.
Applying software updates from KNESTEL when necessary
The instruction manual / user guide is included. Some spare parts and accessories include:
Silica gel for drying (desiccant).
Screw‑in bottles for NaCl solution.
The nozzle (lower/upper parts) of the salt generator.
A display (touch screen) and interfaces (e.g. RS‑232, USB) for system parameters, firmware/software updates.
Full-service support includes: initial consulting, OEM customization, integration services, software for guidelines compliance, white papers, user manuals, FAQs, and ongoing maintenance advice. We help you to effectively integrate the particle counter into your vehicle tests and investigations.