Metal Analysis Instrument Failures and Solutions

Metal analysis instrument failures and solutions 1, the instrument can only display the zero value in the standard state, adjust the sensitivity knob has no obvious effect:

(1) Check if there is any damage to the light source in the colorimetric part of the lamp;

(2) Whether the colorimetric portion and the main signal line are loose.

2. The percentage of voltage displayed when the instrument is in the standard state varies greatly and is not stable:

(1) Check the power supply voltage, the change range should not exceed 200~240V

(2) Change the light source of the marking channel;

(3) The housing is reliably grounded.

(4) The user's power grid signal is not pure 3, and the middle two digits of the instrument's digital tube display "99"

The reason is that the output signal of the colorimetric part has a negative value, and the normal output voltage is 0-2V. The multimeter can be used to check the signal output of the colorimetric part.

4. The zero point cannot be entered. (1) The instrument zero point is unstable. This phenomenon will occur when the instrument is turned on.

(2) After the instrument door block light, the output zero point is not between 2.00-8.00, can open the instrument cover to adjust the corresponding trimmer potentiometer (W2 or W4 or W6) so that the zero point is displayed as about 4.00;

(3) The instrument shows an abnormality and the button does not play any role; this is mostly caused by external power supply interference. Simply turn off the power switch and turn it on again.

6. Print is not working properly When the printer is working normally, the green indicator light SEL on the print panel is off. The printer does not print. Press the SEL key once to print. When the instrument is shipped from the factory, the first curve of each channel is initialized, that is, input a test data. If there is no curve data stored in the curve number of the instrument, the printer will have a wrong printing format. At this time, just input the curve data to the curve number. When the instrument is used for the first time, the corresponding element symbol should be placed according to the tested element. Otherwise, “?” is printed on the position of the element symbol. The trace is not clear, mostly due to the dryness of the ribbon, and the color needs to be replaced. band.

7. The C value of the content displayed by the instrument varies greatly during the measurement. This is due to the change in the temperature of the injected sample liquid. The chemical balance is conditional. One of the most significant is the temperature change. When the hot liquid is poured into the cold cuvette, the temperature will drop and the chemical reaction will rebalance, so the display data will change. The processing method: during the rapid determination, the data should be printed within a certain time after the liquid is poured, and the standard sample should be printed. The waiting time during the test is the same, that is, the temperature condition when establishing the curve should be consistent with the temperature condition of the test sample.