Instruction manual

Instruction Manual PCD 650
19
2.2.11 pH Calibration points
This option allows you to calibrate up to 6 points, depending on the standard
buffer selected. Optionally, you can choose to have custom buffers with 2 to
5 points. When completely re-calibrating the meter, the first point of
calibration should be one of the following, depending on your choice of
standard buffer group. The meter automatically recognizes and calibrates to
the standard pH buffer values, which makes pH calibration faster and easier.
2.2.12 Conductivity Calibration mode
This option allows you to select automatic or manual calibration standard. In
the automatic calibration mode, the meter automatically detects and verifies
the appropriate known calibration standards solutions before accepting these
particular calibration standards as one of its calibration values in a specific
measurement range. Standard buffer values: 84.0 uS/ 1.413 mS/ 12.88
mS/ 111.8 mS
In the manual calibration, non-standard calibration values can be used for
calibration. You can manually input the appropriate values as your desired
calibration standards in each specific range. The selected calibration
standard will be displayed in the bottom of screen. Refer Figure 20.
2.2.13 Conductivity calibration points
This option allows you to select single or multi point calibration. Single point
calibration refers to calibrating one conductivity value and uses it for the
entire 5 conductivity ranges. In multi point calibration, you can calibrate one
point in each of the measuring ranges (up to 5 points). The selected
calibration point will be displayed in the bottom of screen. For example: If
single point calibration is selected it will display ‘SPC’ in the bottom of screen
as shown in diagram.
Figure 20 : Calibration standard & point indicator
But if a multi-point calibration option (calibration for different ranges is
indicated in the Technical Specifications table on page 99) is chosen,
calibration factors are applied only to their respective ranges.
2.2.14 Cell constant
This option lets you to adjust cell constant of the conductivity cell that you are
using. Cell constant can be adjusted from 0.010 to 10.000. Please refer table
on page 106 that lists the optimum conductivity ranges for electrodes with cell
constants of 0.1, 1, and 10.
2.2.15 Normalization Temperature (
°C)
This option will allow you to select a normalized temperature that the meter
will use to normalize its conductivity measurements to a standard
temperature.
NOTE: The factory default value for normalization temperature is 25 °C.
Single point
calibration
Manual calibration
standard