Thermo Fisher Scientific CyberScan pH 1000/pH 2500 - Manual (Page 15)

Instruction Manual pH 1000/ 2500
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6.3 Special Topic: CAL EDIT (for Custom/Non-
Standard Buffers)
The pH 1000/ 2500 bench meter allows non-standard or
custom buffer solutions to be used for calibration. This is
especially useful in applications where the use of special or
non-standard pH buffer solution is required. To use, follow
the steps as described.
1. When in the CAL (pH) mode, press CAL EDIT key. Refer to
section 6.1.3 for further details.
2. The buffer icon at the bottom of the LCD blinks.
3. Enter the desired pH value using the numeric keys.
4. Confirm calibration by pressing YES or NO to re-enter the
value.
5. To enter another non-standard value, repeat steps 1 to 4
again.
NOTE :
As the buffer value entered in the CAL EDIT
mode is non-standard, the meter will not retain
that buffer as an option in future calibrations.
You have to re-enter the value of the buffer.
The division of the calibration ranges to a pH
range within +/1 pH of the standard buffer
options ensures that only one point can be
calibrated in any one of the five ranges.
.
6.4 pH Calibration (without ATC)
Manual Temperature Compensation (MTC) is done by
manually setting the temperature to that of the buffer prior to
calibration. The procedure to set the temperature is outlined
in the section on Temperature Calibration.
Set the desired temperature value in the meter using
software calibration procedure outlined in the Temperature
Calibration. Calibrate for pH using the steps for pH
calibration (ATC) using steps (1) - (5) of Multi-point pH
Calibration.
IMPORTANT: For manual compensation, the temperature
probe must be disconnected. The ATC annunciator is not
displayed on the right hand side of LCD when in calibration
and measurement modes.