Thermo Fisher Scientific CyberScan pH 1100/pH 2100 - Manual (Page 16)

Instruction Manual pH 1100/ 2100
16
3.2 pH measurement
This meter is capable of taking measurements with automatic or
manual temperature compensation. Automatic Temperature
Compensation (ATC) occurs when a temperature sensor is
plugged into the meter. If there is no temperature sensor
plugged into the meter, the default setting is automatically 25°C
(if the meter has never been manually set for temperature) or the
last manually set value. You can manually set the temperature to
match your working conditions using a separate thermometer.
3.2.1
Automatic temperature compensation
For automatic temperature compensation, simply plug the
temperature probe into the meter (see page 8). The ATC
indicator will light on the LCD. See Figure 29.
NOTE: If you are using a temperature probe, the probe must be
submersed in the liquid you are measuring.
3.2.2 Adjusting manual temperature compensation
IMPORTANT: For manual compensation, you must disconnect
the temperature probe.
1. Turn the meter ON. If the meter is NOT in the pH
measurement mode, press EXIT and use >/CAL to select
pH/Temp. The mode selected will flash. See Figure 30.
Press ENTER to confirm selection. The meter is now in pH
measurement mode. If the temperature probe is
disconnected, the upper display will indicate MTC. See
Figure 31.
2. Press >/CAL to enter pH/Temp calibration mode. The
display will flash Cal Mode Activated, Please wait... Press
>/CAL key again to enter the temperature calibration mode.
The display will flash Temperature Cal Mode.
(Please
remove this gap. The copy should follow as one.)See
Figure 32. The upper display then reads MTC Temp:
25.0°C and the lower display reads Key In Std: 25.0°C. See
Figure 33.
3. Check the temperature of your sample using an accurate
thermometer.
4. Key in the temperature value using the numeric keypad. If
you make a mistake, use the
∆/MI or∇/MR key to highlight
mistake, then re-enter.
5. Press ENTER to confirm temperature and to return to the
pH measurement mode. Display will flash Temp Cal
Complete in the upper display and MTC Set Temp:
(temperature that was keyed in). See Figure 34. The display
will flash Sys. Updating...Please wait... The meter then
returns to pH measurement mode and will now compensate
pH reading with the manually set temperature.
NOTE: To exit this program without confirming the manual
temperature compensation value, do not press ENTER in step 5.
Press EXIT instead. The display will flash Error: Cal Aborted and
meter will return to pH measurement mode.
pH/Temp mV Ion
Select & Press ENTER
7.179pH 25.3 C ATC
Jan 18 2002 08:46:25
°
Figure 29
Figure 30
Figure 31
Figure 32
Figure 33
Figure 34
Temperature Cal Mode
MTC Temp : 25.0 C
Key In Std: 25.0 C
°
°
7.179pH 25.3 C MTC
Jan 18 2002 08:46:25
°
Temp Cal Complete
MTC Set Temp: 26.5 C
°