Thermo Fisher Scientific CyberScan pH 1100/pH 2100 - Manual (Page 13)

Instruction Manual pH 1100/ 2100
13
3.1.3 Standard pH buffer calibration
1. When
entering the standard calibration mode, the first buffer
calibration point for standard pH buffers is 7.000 or 6.860
(depending upon which pH buffer set is selected). The upper
display shows the current reading, the lower display will show
Auto Buf Scan: 7.000 (or 6.860). The upper display will flash pH
until the reading has stabilized. See Figure 16. If the selected
buffer value is not within ±1.0 of the measured pH value, the
Auto pH Scan will continue to change until the pH buffer is
within ±1.0.
2. When pH reading has stabilized, press ENTER. The lower
display flashes *pH Offset Cal Done. See Figure 17. This
calibration point is now stored in the meter.
• If you are performing a one-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 multi-point calibration, go to step 3.
3. Rinse the probe with deionized water or a rinse solution, and
place it in the next pH buffer. The lower display automatically
scans to the next pH buffer solution.
4. Wait for the measured pH value to stabilize. The upper display
will flash pH until the reading has stabilized.
5. When pH reading has stabilized, press ENTER. The lower
display flashes 2 Point Cal Done * (3 if you have calibrated 3
points,4 if 4 points, etc.). See Figure 18. This calibration point is
now stored in the meter. Repeat steps 3-5 for each point you
wish to calibrate. When you are finished calibrating, 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.
6. If you perform a complete 5-point pH calibration, when you
calibrate the fifth point and press ENTER, the meter
automatically returns to measurement mode. You may now start
taking pH readings.
NOTE:
To exit from pH calibration mode at any point without confirming calibration, DO NOT press ENTER in steps 2, 5 or 6.
Press EXIT instead. If EXIT is press before a 1-point calibration is performed the upper display flashes Error: Cal Aborted.
See Figure 19.
DO NOT REUSE SOLUTIONS AFTER CALIBRATION.
Contaminants in the solution can affect the calibration, and eventually the accuracy of the measurements.
Figure 16
Figure 17
Figure 18
Figure 19
7.001pH 25.4 C ATC
Auto Buf Scan: 7.000
°
7.001pH 25.4 C ATC
pH Offset Cal Done
°
*
Error: Cal Aborted
10.010
2 Point Cal Done *
pH 25.4 C ATC °