Instruction Manuals - Cole-Parmer

Instruction Manual pH 1100/ 21009 TEMPERATURE CALIBRATION9.1 Temperature CalibrationFor this calibration procedure, the ATC probe should be attached to the meter. ATC will appear in the upper display. SeeFigure 72.1. Dip the temperature probe into a solution of known temperature,such as a temperature bath, for a few minutes until thetemperature probe stabilizes.2. If you are not already in pH/temp measurement mode, pressEXIT and use >/CAL to select pH/Temp. The mode selectedwill 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 displaywill flash Cal Mode Activated, Please wait... Press >/CAL againto enter the temperature calibration mode. The display will flashTemperature Cal Mode. See Figure 74. Then the upper displaywill read ATC Temp: (current temperature) and the lowerdisplay will read Key In Std: (current temperature). See Figure75.4. Key in the known temperature value from step 1 using thenumeric keypad. If you make a mistake, use the Δ/MI or ∇/MRkeys to highlight mistake, then re-enter.5. Press ENTER to confirm. The display flashes Temp CalComplete, ATC Offset: (shows offset value). See Figure 76. Thedisplay then flashes Sys Updating, Please wait..., and the meterreturns to pH measurement mode.NOTE: The meter will not allow input values that exceed theallowable limit of ±5°C (±9°F) of the original displayed reading.7.546pH 25.3°C ATCJan 18 2002 08:46:30Figure 72pH/ Temp mV I onSelect & Press ENTERFigure 73Temperat ur e Cal ModeFigure 74ATC Temp : 25.0 ° CKey I n St d: 25.0 ° CFigure 75Temp Cal CompleteATC Of f set : 2.0 ° CFigure 769.2 Temperature Calibration Error MessagesIf you press EXIT to leave the temperature calibration mode prior toconfirming the calibration, the screen will flash Error: Cal Aborted.See Figure 77. The meter then returns to pH measurement mode. Ifthe temperature value keyed in (temperature offset) is not within±5.0°C (±9.0°F) of the current temperature value, the upper displaywill flash Error: and the lower display will read ATC offset too large.See Figure 78. The meter returns to temperature calibration modeand a new temperature offset value needs to be entered.Er r or : Cal Abor t edFigure 77Er r or :ATC Offset too largeFigure 7826