Thermo Fisher Scientific CyberScan pH 1100/pH 2100 - Manual (Page 22)

Instruction Manual pH 1100/ 2100
22
5.3 Ion measurement
The pH 2100 meter features two different modes of ion
measurement: high resolution mode and low resolution mode.
These modes are user selectable in the Ion setup program P3.4.
(page 47). The default is high resolution mode. Low resolution
mode should only be used if your ion solution concentration will
produce an absolute mV value of ±500 mV.
1. 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 58. Press ENTER
to confirm selection. The meter is now in Ion measurement
mode. If the meter has not been calibrated, or has been reset,
the display will flash Ion Meas and current mV value. See
Figure 59. If the meter has been calibrated, the display will
show the current concentration value plus the absolute mV
produced by the electrode.
See Figure 60.
2. Prepare samples as necessary. Sample preparations varies
depending on ion type—see your electrode manual for details
on the specific electrode that you are using.
3. Dip electrode into the sample. The sensor or glass bulb of the
electrode must be completely immersed into the sample.
4. Allow time for the reading to stabilize, then record your
measurement.
NOTE: The display in the ion measurement mode shows mV that
correlates to the electrode output. Charge in mV will typically be
59.7 mV for monovalent ions (1
+
or 1
-
charge) and 29.8 mV for
divalent ions (2
+
or 2
-
charge).
pH/Temp mV Ion
Select & Press ENTER
Ion Meas 160.3mV
Jan 20 2002 21:54:34
0.013ppm 160.3mV
Jan 21 2002 21:35:34
Figure 58
Figure 59
Figure 60