Hach Pocket Colorimeter II User Manual page 21

13. Push READ. The
display shows the
measurement results.
Show the recorded measurements
Refer to the "rCL" option in
User-entered calibration
This instrument accepts a user-prepared calibration curve. The
calibration curve can be from 0 to 2.5 absorbance. Make sure that the
calibration curve includes standard values that are less and more than
the range of interest.
The instrument range will be the same as the calibration range. For
example, when the standards that are used are 1.00, 2.00 and 4.00.
The instrument range is 1.00 to 4.00.
There are two options to enter a user calibration curve:
• Enter a calibration curve with standards—The standard solution
values are entered with the keypad and the absorbance values are
measured.
• Enter a calibration curve with the keypad—The standard solution
values and absorbance values are entered with the keypad.
Note: If the instrument is set to off or the instrument power is removed before a
user-entered calibration curve is completed, the calibration curve is not saved.
The instrument automatically switches off in user-entered calibration entry mode
after 60 minutes of no activity. User-entered calibrations are completed when the
user goes out of calibration (cal) mode or edit mode.
Configure the instrument on page 11.
English 21