Description
Ideal for determining the conductivity of coolants in HV vehicles, fuel cells, and transformer oils.
Coolants currently used in the cooling systems of diesel, gasoline, CNG, and electric vehicles fulfill the following main tasks:
- Rapid heat dissipation and heat transfer (cooling and heating—temperature control)
- Corrosion protection for all parts 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 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 for all parts in contact with 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 02_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.
Handheld conductivity meter with LCD display, 128 x 64 pixels, backlit, with graphical display and plain text menu structure
- Operation via housing keypad
- USB interface for configuration and data recording
- Data logger with 4,000 data sets
- 0…200 μS, 0…2000, μS, 0…20 mS, 0…500 mS/cm or automatic measuring range detection
- Temperature measurement and compensation 0…100 °C
- Power supply: 3 x AA 1.5 V (included)
- Ambient temperature: -10…55 °C
- Housing ABS, protection class IP 65
- USB connection via 4-pin socket
- Conductivity measuring cell, 4-electrode technology Integrated Pt 1000, 1 m cable with 6-pin M16 DIN connector
- 50 ml calibration solution 80 μS/cm at 25 °C
- ±1 % FS in the measuring range: 0…200 μS
- Complete in case with measuring cell
