Hach TL2300 Manuel D'utilisation De Base page 14

3. Select the calibration curve range and type of calibration standard.
Option
StablCal RapidCal
(0–40 NTU)
StablCal (0–4000
NTU)
Formazin RapidCal
(0–40 NTU)
Formazin (0–4000
NTU)
SDVB (0–4000 NTU)
EU Pharm
(0–30 NTU)
Custom Calibration
4. Select the remaining calibration options.
Option
Verify after Cal.
Calibration
Reminder
Reset to Factory
Calibration
Prepare the StablCal standards
When received and at intervals:
1. Clean the exterior surface of the StablCal vials with laboratory glass cleaning detergent.
2. Rinse the vials with distilled or deionized water.
3. Dry the vials with a lint-free cloth.
Note: Never shake or invert the < 0.1 NTU standard. If the standard has been mixed or shaken, do not move the
vial for 15 minutes or more before using.
Note: Do not remove the caps from the sealed vials.
Make sure that the StablCal standards are at ambient instrument temperature before use (and no
greater than 40 °C (104 °F)).
Invert the standards (except < 0.1 NTU) before use. Refer to the user instructions that are supplied
with the StablCal standards.
14 English
Description
Calibration with 20-NTU StablCal standard (default).
Note: The dark current in the instrument is used as the zero point of the calibration
curve. The calibration curve is linear from 0-40 NTU, thus low turbidity
measurements are very accurate.
Full-range calibration (<0.1 NTU, 20 NTU, 200 NTU, 1000 NTU, 4000 NTU) with
StablCal.
Calibration with 20-NTU formazin standard.
Note: The dark current in the instrument is used as the zero point of the calibration
curve. The calibration curve is linear from 0-40 NTU, thus low turbidity
measurements are very accurate.
Full-range calibration (20 NTU, 200 NTU, 1000 NTU, 4000 NTU and dilution water)
with formazin.
Full-range calibration (20 NTU, 200 NTU, 1000 NTU, 4000 NTU and dilution water)
with spherical styrene divinylbenzene.
Full-range calibration (<0.1 NTU, 3 NTU, 6 NTU, 18 NTU, 30 NTU).
The user can enter a custom calibration for turbidity. The user selects the number of
calibration standards and the value of each calibration standard. Use a custom
calibration when smaller sample cells are used with a sample cell adapter.
Description
Sets the instrument to start a verification immediately after the instrument is calibrated.
When set to on, the verification standard is measured immediately after a calibration is
done. Default: ON. The value of the verification standard shows on the display as the
last standard during calibration.
Sets the time interval between calibrations. When a calibration is due, the display will
show a reminder and a question mark on the calibration icon at the top of the display.
Options: Off (default), 1 day, 7 days, 30 days or 90 days. When a calibration is done,
the calibration time is set to zero.
Sets the calibration settings to the factory defaults.