Zuzi 4251/50 Manuel D'instructions page 25

ENTER (2.7) (Fig. 12).
- Put the sample number 1 into the light path, input the concentration of that sample by using the keypad
(2.10) and press ENTER (2.7).
- Repeat this procedure with each Standard sample. Once the last concentration has been input, the equip-
ment will return to the parameter setting display.
Figure 12
√ Standard curve
Unit
Number
Concentration
Note: 1. The absorbance or transmittance value of Standard samples will not be displayed; they will be directly
saved in the RAM.
2. Concentration range is 0-9999; any value out of this range will be invalid.
3. Standard samples must be input from lower to higher concentration.
Visualization of standard curve:
- On the parameter setting display, move the cursor with ▼/▲ (2.9) to select Display curve and press
ENTER (2.7); the just established standard curve will be displayed (Fig. 13). The equation of the curve will also be
displayed at the lower side of the screen and will be saved on the equipment memory.
Figure 13
√ Standard curve
Concentration
Display curve
Select curve
- If an error message appears (Fig. 14) check samples and input data; press any key and repeat the procedure.
Figure 14
√ Standard curve
Concentration
Display curve
Select curve
Selection of a curve:
- On the parameter setting display, move the cursor with ▼/▲ (2.9) to select Select curve and press ENTER
(2.7) (Fig. 15).
Figure 15
√ Standard curve
Concentration
Display curve
Select curve
- The equations of the previously established curves (the newly established curve will be displayed at the
end of the group). A total of 200 curve equations can be saved.
- Move the cursor with ▼/▲ (2.9) to select the desired equation and press ENTER (2.7); the equipment will
return to the parameter setting display.
- To delete a equation, select it and then press CLEAR (2.8).
Test and print
Once the concentration curve has been selected or created proceed as follows:
On the pres-test interface, press START/STOP (2.5) to enter the results display.
After blanking, put the sample of unknown concentration into the light path and press START/STOP (2.5). The
Version 2 Nov-10
Pull sample 1
ENTER
C=1.500
Please Input New:
C=
RETURN
0.500 A
ENTER
r=0.999
C=1.001* A+0.2
RETURN
ENTER
Establish wrong!
Any key
No. Para
ENTER
1.
2.
3.
RETURN
Instruction manual 54251050
0
0.8 C
C=0.860* A+0.000*
C=0.732* A+0.125
C=0.005* A+0.002
Page. 25