Conductivity meter for coolant solutions in electric and fuel cell vehicles

Description

• Coolants currently used in the cooling systems of diesel, petrol, CNG or electric vehicles fulfil the following main tasks:
  • rapid heat dissipation and heat supply (cooling and heating - tempering)
  • Corrosion protection of all parts wetted in the cooling system and thermal management
  • Frost protection and overheating protection  
  • Protection against deposits
• The water added to the coolant concentrate plays an important role. This added water should be demineralised. 
• Insulating operating fluids are increasingly being used in hybrid, electric and FC vehicles. The use of high-voltage components is always accompanied by the use of insulating media (oils, coolants, etc.), e.g. insulating POE compressor oils in HV vehicles.
• Even coolants that are increasingly used in thermal management systems/cooling systems in HV and FC systems have these insulating properties. 
• In thermal management systems of fuel cells and special high-voltage systems, special ready-to-use coolants are used that fulfil another main task.
  • rapid heat dissipation and heat supply (cooling and heating - tempering)
  • Corrosion protection of all parts wetted in the cooling system and thermal management
  • Frost protection and overheating protection 
  • Protection against deposits
  • electrically insulating property (very low conductivity = high insulation)
• The use of conventional coolants is NOT permitted in the applications mentioned here and will lead to irreparable damage.
• Mixtures of conventional coolants and coolants with very low conductivity [µS/cm] are also not permitted. 
• Most ready-to-use coolants are used for this application, as (electrically insulating) deionised water is usually not available in workshops. The manufacturer's information must be observed. 
• These coolant mixtures are significantly more expensive than conventional coolant mixtures of e.g. combustion engines.  Therefore, a detailed and documentable measurement of the critical conductance parameter is worthwhile.
• If the conductance of the coolant increases significantly, this can lead to short circuits within the fuel cell, for example.
• Therefore, the coolant must be replaced as soon as an increased conductance is measured in the coolant.
• Usually, the ion exchanger of the cooling circuit/thermal management system must be replaced at the same time as the new coolant is used.
• The LWM 01_LR measuring device from Autotestgeräte Leitenberger GmbH is the optimal solution for making an informed decision as to whether and when the coolant and the ion exchanger need to be replaced.

• The LWM 01_LR conductivity meter is a real all-rounder for checking the quality of coolant solutions.
• 4 ranges conductivity: 200µs/2ms/20ms/200ms
• A 3-point calibration as well as an automatic temperature compensation guarantee a high level of accuracy even with very fluctuating measurement temperatures.
• All values can be saved directly to the SD card (1 ... 16 GB) (not included in the scope of delivery)
• The saved data is saved directly as an Excel file on the SD card (no software is required for evaluation)
• High precision
• Large LC display
• On request with factory calibration certificate, for LWM 01_LR, medium FCC, 1 measuring point (€ 199.--)