Human HumaStar 600, User Manual

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HumaStar 600 | User manual
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Two point kinetics (high dispersion)
1. Verify if standard absorbance is too low (verify data provided by standard
manufacturer).
2. Verify initial consumption is too high (verify data provided reagent manu-
facturer).
3. Perform energy tests.
4. Verify reagent handling and storage.
5. Check method parameter for reagent, low sample volume or too short inter-
val times.
6. Check time table for dispersion on first measurement.
Two point kinetics (high dispersion)
Verify factor, standard and method for reagent.
Repetition or dilution (colorimetric or non linear kinetics)
1. Verify if sample volume is too high, check reagent linear limit.
2. Replace reagent and compare.
Repetition or dilution (two point kinetics)
This is not actually an error; it is because volume / absorbance change relation-
ship is not linear, and so it is necessary to dilute standard and compare.
Reactions (general comparison between reactions)
1. Control quality of water.
2. Verify proper usage of solutions (System Wash Solution, rinse solution, etc).
3. Use uric acid to check water quality.
4. Verify for frosted cuvettes (presence of salts).
5. Verify scratching or old reactions residues (not enough washing).
6. Perform instrument validation tests.
“Standard absorbance error” message
1. Check/replace standard.
2. Replace standard by a known concentration sample.
3. Decrease parameter “minimal standard absorbance”.
“Doubtful” flagged reaction
This message appears when concentration after dilution is lower than meas-
ured before dilution; it could be due a bubble, dirty probe or problem in reagent.