Description
Coolants that are currently used in cooling systems of diesel, gasoline, CNG, or electric vehicles fulfill the following main tasks:
- Rapid heat dissipation and heat transfer (cooling and heating - temperature control)
- Corrosion protection for all parts in contact with 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 demineralized. Increasingly insulating operating fluids are being used in hybrid, electric, and fuel cell vehicles. The use of high-voltage components always goes hand in hand with the use of insulating media (oils, coolants, etc.), e.g., insulating POE compressor oils in HV vehicles. Even coolants, which are increasingly used in thermal management systems/cooling systems in HV and FC systems, have these insulating properties.
In thermal management systems for fuel cells and special high-voltage systems, special ready-to-use coolants are used that fulfill another important function.
- Rapid heat removal and heat supply (cooling and heating – temperature control)
- Corrosion protection of all parts wetted in the cooling system/thermal management
- Frost protection and overheating protection
- Protection against deposits
- Electrically insulating properties (very low conductivity = high insulation)
The use of conventional coolants is NOT permitted in the applications mentioned hereand will result in irreparable damage. Mixtures of conventional coolants and coolants with very low conductivity [µS/cm] are also not permitted. Ready-to-use coolants are mostly used for this application, as (electrically insulating) deionized water is not usually available in workshops. The manufacturer's information must be observed. These coolant mixtures are significantly more expensive than conventional coolant mixtures for combustion engines, for example. It is therefore worthwhile to carry out a thorough and documentable measurement of the critical conductivity parameter.
If the conductivity of the coolant increases significantly, this can lead to short circuits within the fuel cell, for example. The coolant must therefore be replaced as soon as an increased conductivity is measured in the coolant. Usually, the ion exchanger of the cooling circuit/thermal management system must be replaced at the same time as new coolant is used. The LWM 01_LR measuring device from Autotestgeräte Leitenberger GmbH is the ideal solution for making an informed decision on whether and when the coolant and ion exchanger need to be replaced.
The LWM 01_LR conductivity measuring device is a true all-rounder for checking the quality of coolant solutions.
- 4 conductivity ranges: 200 µs/2 ms/20 ms/200 ms
- A 3-point calibration and automatic temperature compensation guarantee high accuracy even with highly fluctuating measurement temperatures.
- All values can be stored directly on the SD card (1 ... 16 GB) (not included in the scope of delivery).
- The stored data is saved directly as an Excel file on the SD card (no software required for evaluation).
- High accuracy
- Large LC display
On request with factory calibration certificate, for LWM 01_LR Medium FCC, 1 measuring point (€ 199.--)
