Thermo Fisher Scientific CyberScan pH 1100/pH 2100 - Manual (Page 20)

Instruction Manual pH 1100/ 2100
20
5 ION CALIBRATION AND MEASUREMENT (ONLY APPLICABLE FOR pH 2100)
The pH 2100 meter reads ion concentration in ppm, ppt, mg/l, g/l, mmol/l and mol/l units. See Ion setup Program P3.0
(page 43) to select ion concentration units.
5.1 Ion calibration
This instrument is capable of up to 5-point custom ion calibration with a minimum of 2-point calibration. Custom
calibration values can be any value between 0.001 and 19998. Once the first calibration value is keyed in, all other
calibration will automatically be at least one decade apart.
For example if your first calibration point is at 0.001, all other calibration points will be at least one decade apart from
0.001 (0.001, 0.01, 0.1,1.0, 10.0, 100, 1000, 10000).
For best accuracy calibrate your meter to points with similar concentrations to the solutions you want to test.
1. Connect an Ion Selective Electrode (ISE) to the BNC input
connector on the back of the meter.
2. Turn
the meter ON. If the meter is not in the Ion measurement
mode, press EXIT and use >/CAL to select Ion. The mode
selected will flash. See Figure 48. Press ENTER to confirm
selection. The meter is now in Ion measurement mode.
3. If the meter has not been calibrated or has been reset, the
display will flash Ion Meas and current mV value. See Figure
49. If the meter has been calibrated previously, the display will
show the current concentration value plus the absolute mV
produced by the electrode.
4. Dip the electrode into the first calibration standard. Start with
the calibration standard that has the lowest concentration and
move up to higher concentration standards.
5. Press
>/CAL to enter the ion calibration mode. The display will
flash Cal Mode Activated, Please wait... See Figure 50. The
display then shows Ion Conc: ppm (or unit selected in ion
setup mode) in the upper display and Abs. mV: in the lower
display. See Figure 51.
6. The first calibration point must be keyed in by the user. Key in
the concentration value of the standard using the numeric
keypad. If you make a mistake, use the
∆/MI or ∇/MR keys to
highlight mistake, then re-enter.
7. Press
ENTER to confirm the first calibration point. The display
will flash 1 Cal Point Done *, then the meter proceeds to the
next calibration point at least 1 decade apart from the first
calibration point. See Figure 52.
8. Use
∆/MI or ∇/MR keys to move the cursor to next calibration
point. All points will be a decade apart from the first calibration
point.
9. Rinse off the electrode with deionized water before placing it
in the next calibration standard.
10. Allow probe to stabilize in calibration standard. Press ENTER
to confirm. The display flashes 2 Point Cal Done *. See
Figure 53.
The meter proceeds to the next calibration point.
pH/Temp mV Ion
Select & Press ENTER
Cal Mode Activated
Please wait. . .
Ion Meas 160.3mV
Jan 20 2002 21:54:34
Figure 48
Figure 49
Figure 50
Figure 51
Figure 52
Figure 53
Ion Conc: ppm
Abs. mV : 100.7mV Ion Conc: ppm
Abs. mV : 100.7mV
Ion Conc:0.01ppm
1 Point Cal Done *
Ion Conc:0.10ppm
2 Point Cal Done *