Thermo Fisher Scientific CyberScan pH 1100/pH 2100 - Manual (Page 26)

Instruction Manual pH 1100/ 2100
26
9 TEMPERATURE CALIBRATION
9.1 Temperature Calibration
For this calibration procedure, the ATC probe should be attached to the meter. ATC will appear in the upper display. See
Figure 72.
1. Dip the temperature probe into a solution of known temperature,
such as a temperature bath, for a few minutes until the
temperature probe stabilizes.
2. If you are not already in pH/temp measurement mode, press
EXIT and use >/CAL to select pH/Temp. The mode selected
will flash See Figure 73. Press ENTER to confirm selection.
The meter is now in pH measurement mode.
3. Press
>/CAL to enter pH/Temp calibration mode. The display
will flash Cal Mode Activated, Please wait... Press >/CAL again
to enter the temperature calibration mode. The display will flash
Temperature Cal Mode. See Figure 74. Then the upper display
will read ATC Temp: (current temperature) and the lower
display will read Key In Std: (current temperature). See Figure
75.
4. Key in the known temperature value from step 1 using the
numeric keypad. If you make a mistake, use the
∆/MI or ∇/MR
keys to highlight mistake, then re-enter.
5. Press ENTER to confirm. The display flashes Temp Cal
Complete, ATC Offset: (shows offset value). See Figure 76. The
display then flashes Sys Updating, Please wait..., and the meter
returns to pH measurement mode.
NOTE: The meter will not allow input values that exceed the
allowable limit of ±5°C (±9°F) of the original displayed reading.
9.2 Temperature Calibration Error Messages
If you press EXIT to leave the temperature calibration mode prior to
confirming the calibration, the screen will flash Error: Cal Aborted.
See Figure 77. The meter then returns to pH measurement mode. If
the temperature value keyed in (temperature offset) is not within
±5.0°C (±9.0°F) of the current temperature value, the upper display
will flash Error: and the lower display will read ATC offset too large.
See Figure 78. The meter returns to temperature calibration mode
and a new temperature offset value needs to be entered.
Error :
ATC Offset too large
ATC Temp : 25.0 C
Key In Std: 25.0 C
°
°
Temperature Cal Mode
Error: Cal Aborted
pH/Temp mV Ion
Select & Press ENTER
7.546pH 25.3 C ATC
Jan 18 2002 08:46:30
°
Figure 72
Figure 73
Figure 74
Figure 75
Figure 76
Figure 77
Figure 78
Temp Cal Complete
ATC Offset: 2.0 C
°