BR5N-1-OMA-103a
16
Section 4 – Maintenance and inspection
4.1
Adjustment with standard solution
The standard value that is set in the equipment will fluctuate corresponding to
deterioration of the light bulb, so to keep the accuracy of the instrument,
confirm the value every 1 month (assuming 2 hours of usage/day) or
after the light bulb is replaced or the instrument is not used for a long interval.
*Standard solution to be used for the adjustment must be diluted precisely.
Otherwise, measured value could have error.
4.1.1 The procedure of adjustment
1. Turn on the power switch and wait until the LCD display shows “Ready”.
2. Adjust “ZERO” according to the procedure of 3.1, 3-6 .
3. Prepare standard solution with "Hi Level Check-BIL", manufactured by
International Reagents Corp., Japan or any substitute standard solution.
[Prepare original standard solution]
Remove cap and stopper of Hi Level Check-BIL. Reconstitute each vial with 3m
ℓ
distilled or deionized water of low bacterial count. Replace the stopper. Leave it as it
is for 5 minutes, then mix well by swirling. A high concentration standard is
obtained.
[To use with BR-5000N]
Empty the standard solution into a larger container. Add 6m
ℓ
of distilled or
deionized water and dissolve the standard solution again. Assay value
×
1/3
concentration standard is obtained. This is the specified value to be used with
BR-5000N.
* The assay value of Hi Level Check-BIL is specified per each production Lot.
Confirm the value in note enclosed with Hi Level Check-BIL, e.g. assay value for
Lot No. 7324 is 54.0mg/
㎗
. Specified value is 54.0
×
1/3 = 18.0mg/
㎗
.
4. Set the standard vbalue of the standard solution according to the section 3.5.1.
5. Fill standard solution into a capillary tube (blue line)
and set it in the capillary holder, then press the “CAL” key
not less than 2 second.
6. The adjustment will end if the display shows “Measure End”.
If “Error BBK = x.xxx” is shown, confirm the standard
solution and the procedure of calibration, and calibrate it again.
* Measure the standard solution as the normal sample,
then confirm if the measured value falls within
±
0.5 of
the calibrated value.
[Auto CAL]
[Auto CAL]
[Auto CAL]
[Auto CAL]
Measure Start
Measure Start
Measure Start
Measure Start
[Auto CAL]
[Auto CAL]
[Auto CAL]
[Auto CAL]
Measure End
Measure End
Measure End
Measure End
[Auto CAL] 20.0
[Auto CAL] 20.0
[Auto CAL] 20.0
[Auto CAL] 20.0
Error BBK=0.000
Error BBK=0.000
Error BBK=0.000
Error BBK=0.000
