Thermo Fisher Scientific CyberScan pH 1100/pH 2100 - Manual (Page 14)

Instruction Manual pH 1100/ 2100
14
3.1.4 Custom pH buffer calibration
1. When entering the custom calibration mode, the lower display
will show Key In Std:. The upper display shows the pH buffer the
electrode is dipped into. The lower display will show the same
value as the upper display only if the meter has not been
calibrated or if the meter has been reset. See Figure 20. If the
meter has previously been calibrated, the lower display will
toggle to the stored calibration point that is closest to current
buffer value.
2. Using the numeric keypad (See Figure 21), enter the value of
the first custom pH buffer. If you make a mistake, use the
∆/MI
or
∇/MR to highlight mistake, then retype.
3. Press ENTER when first custom pH buffer is keyed in. The
display will read 1 Point Cal Done *. See Figure 22.
NOTE: In the custom pH buffer calibration mode you must
perform at least a 2-point calibration, if you press EXIT before
you calibrate at 2 points the screen will flash Error: Cal Aborted
(See Figure 23) and will return to the pH measurement mode
without confirming any calibration points.
4. Rinse the probe with deionized water or a rinse solution, and
place it in the next custom pH buffer. The lower display will
show Key In Std: The upper and lower displays show the pH
buffer
value.
5. Enter the value of the next custom pH buffer. Press ENTER
when done. The display will read 2 Point Cal Done *. If you are
performing a 2-point calibration, press EXIT. The screen flashes
Sys Updating...Please wait... The meter then returns to the pH
measurement mode. You may now start taking pH readings.
• If you are performing a 3, 4 or 5-point calibration go to step
6.
6. Repeat steps 4 and 5 for each additional custom buffer. Upon
confirmation of pH buffer, the display will read 3 Point Cal Done
* (4 if you have calibrated points, etc). When you have finished
calibrating desired number of points, press EXIT. The screen
flashes Sys. Updating... Please wait...
The meter then returns to the pH measurement mode. If you
have entered 5 calibration points, the meter will automatically
return to pH measurement mode. You may start taking pH
readings.
NOTE:
To exit from pH calibration mode at any point without confirming calibration, DO NOT press ENTER in steps 3 or 5. Press
EXIT. If EXIT is pressed before a 2-point calibration is performed the upper display flashes Error: Cal Aborted. See
Figure 23.
DO NOT REUSE SOLUTIONS AFTER CALIBRATION.
Contaminants in the solution can affect the calibration, and eventually the accuracy of the measurements.
Figure 20
Figure 21
Figure 22
Figure 23
7.179pH 25.3 C ATC
Key In Std: 7.179 °
Error: Cal Aborted
7.179pH 25.3 C ATC
1
°
Point Cal Done *
Numeric Keypad
7.179pH 25.3 C ATC
Key In Std: 7.179 °
7.179pH 25.3 C ATC
1 Cal Point Done °
*