The Free Lime Analyzer consists of a sturdy sheet steel housing, in which all components of the instrument are integrated.
The microprocessor control and all electrical parts are implemented into the left side of the housing. In the upper housing a glycol storage tank with level indicator
is built-in. A heating coil connects the storage tank with the measuring beaker. The beaker is equipped with a magnetic agitator and a conductivity sensor, which is plunged into the beaker. On the rear side of the instrument the serial interfaces RS232 and RS485 are available for the connection of a printer and the connection to a PC. The temperature measurements are realized
by two PT100 temperature sensors, which are mounted on the heating coil and the beaker.
The test parameters (cement type, operator, sample identification etc.) are selected and set from a selection list on the display. After the selection, the test procedure is started via the keyboard.
Glycol fows down from the heating coil into the beaker. The temperature is maintained during the complete test procedure. Then, an acoustic signal and a sign on the display indicate the operator to pour the cement into the beaker and to start the measuring procedure.
The agitator is activated automatically and the test material is dissoluted inside the glycol according to the set dissolution time (depending on the grinding fineness).
After the dissolution, the conductivity measurements are done by the conductivity sensor. The instrument compares the measured values with stored calibration curves for the determination of the free lime content.
If the measurements are finished, the glycol is drained automatically into an external collecting container and the set number of cleaning cycles are started.
An acoustic signal indicates the end of the test and the instrument shows the accurate free lime content of the test material on the display. For each test the parameters, the average conductivity value, the average temperature of the heating coil and the beaker are stored additionally. 300 results can be stored in the data base of the instrument. The results can be transferred to a
PC for the evaluation or sent to a printer for a direct printout.
Multiple instrument parameters, like the dissolution time, the number and the duration of the cleaning cycles and the temperature of the glycol are variables
that can be adjusted. The parameters and the calibration curves are protected by a password.