Common troubleshooting for elemental analyzers
The QL-BS3 series of microcomputer three-element high-speed analyzers are three-channel photoelectric colorimetric analyzers for multi-element analysis. Based on the advanced technology at home and abroad, the instrument adopts advanced technologies such as “intelligent dynamic tracking†and “non-linear regression of standard curve†for the first time, which makes the daily adjustment of the traditional colorimeter and the establishment of the standard curve. A fundamental change. This instrument is among the ranks of high-end analytical instruments.
1. The instrument can only display the zero value when it is in the standard state. The adjustment sensitivity knob has no obvious effect:
(1) Check the LEDs in the colorimetric part of the lamp for damage;
(2) Whether the signal line of the colorimetric part and the host is loose;
2. The percentage of voltage displayed by the instrument in the calibration state varies greatly and is unstable:
(1) Check the power supply voltage, the range of which varies from 187 to 242V;
(2) replacing the light source LED of the corresponding channel;
(3) The casing is reliably grounded.
3, the element analysis instrument digital tube in the middle two digits display "99"
Is the colorimetric part of the output signal has a negative value, the normal output voltage is 0-2V, you can use the multimeter to check the colorimetric part of the signal output socket 1-6, 3-6, 5-6 feet, the sixth foot is the common end, open the instrument Cover, use a small compass to adjust the zero potentiometer (W1 or W3, W5) to make it a positive voltage.
4, zero lose can not go in
(1) The zero point of the instrument is unstable, and this phenomenon will occur when the machine is turned on;
(2) After the light door of the instrument is blocked, the output zero point is not between 2.00 and 8.00. The upper cover of the instrument can be adjusted to adjust the corresponding trimmer potentiometer (W2 or W4, W6), so that the zero point is displayed as 4.00 or so;
(3) The instrument is placed in the external colorimeter state, and the prompt is always flashing slowly. In this case, you only need to modify it according to the 8th instruction of Appendix 2.
5, the elemental analysis instrument shows an abnormality, the button does not play any role
This is mostly caused by external power supply interference, just turn off the power switch and turn it on.
6. The C value displayed by the instrument changes greatly during the measurement.
This is due to the change of the temperature of the injected sample liquid. The chemical equilibrium is conditional. The most influential is the temperature change. When the hot liquid is poured into the cold cuvette, the temperature will drop and the chemical reaction will be rebalanced. , so the display value changes, the processing method:
In the rapid measurement, the data should be printed within the determined time after pouring, and the time taken for the standard sample should be the same as the time waiting for the test sample, that is, the temperature condition of the established curve should be consistent with the temperature condition of the test sample.
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Label: Common troubleshooting for elemental analyzers
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