JFB-I portable reflectivity tester for determination of coating coverage / contrast ratio | Обустройство дома

Measuring range: 0 ~ 100
Repetition precision: less than 0.3
Input power supply: DC 9v
Indication error: less than 1
Weight: 1Kg
External dimensions: 160× 45× 100 mm ( length× width× height )

JFB-I便携式反射率测定仪

I. Overview

Our company producesJFB-IPortable reflectometer is a special instrument developed for the implementation of national standards in paint, pigment, ink and other chemical industries. It can be used to determine the covering power of paint film. The instrument fully conforms to the national standardISO3906-1980(E)National standardsGB/T13452．3-92,GB9270-88,GB5211．17-88Requirements for the instrument.

Ii. working principle

This instrument is composed of host computer, standard board ( black and white each piece ), charger, etc.

The use of this machine0Illumination, diffuse reflection reception principle. When the reflected light of the sample acts on the surface of the photocell, the generated electric signal is input to a DC amplifier for amplification and is read and displayed.

III. Main technical parameters

1Measuring range         0-100

2Repetition accuracy        ≤0.3

3Indication error           ±1.0

4Ambient temperature5oC~40oC  Relative humidity <85％

5Input power supplyDC9∨  working voltageDC7.2V.

IV. Methods of use

1, press the power switch, boot preheating2Minutes. It is preferable to place the probe on a black standard plate at this time.

2School Zero: put the mainframe on the black standard board and adjust the zero knob on the mainframe. Because the machine does not have a negative sign, it should operate as follows in the process of adjusting zero, such as clockwise rotation, when the display value is larger, then the rotation direction reverses the counter clockwise direction, and the machine is slowly rotated to display the machine. 00.0The permissible variable values are:00.1.

3Correction standard value: put the host on the white standard board, adjust the calibration button of the host computer, so that the number of the host display is consistent with the calibration value of the white standard board. Allowable variation0.1Repeatedly adjusted once (zero, calibration).

4MeasurementRBValue: move the mainframe to a black working ceramic plate with a sample. The display value isRBValue.

5MeasurementRwValue: transfer the host to the white working ceramic plate with the sample. The display value isRwValue.

6The ratio of contrast to ratio is calculated.RB/RW×100％

V. matters to be noted:

1In order to ensure the accuracy of measurement, the instrument should be calibrated frequently, and the allowable deviation is +.0.3If more than that0.3It needs to be recalibrated.

2To overcome the fatigue of photocell, the mainframe should be placed on the black standard board during the test interval.

3The preparation of samples shall be in strict accordance with the relevant national standardsGB9271-88The provisions of the.

4The instrument should be recharged before use, and can be used after charging normally.10Hours or so, when the instrument power is insufficient, the display window will appear at the top left "LOBAT" words, then need to charge immediately.