• One key—The operator can change all the settings and do all the tasks in the Security settings
that have a security level of off or one key.
• Two keys—The operator can change all the settings and do all the tasks in the Security
settings.
Note: Before a security level can be selected, the Security setting must be set to on. Refer to Configure the
instrument settings on page 11.
7. Push OK>Close.
8. To edit an operator ID, select the operator ID and then push Options>Edit.
9. To delete an operator ID, select the operator ID and then push Options>Delete>OK.
6.1.3 Add sample IDs
Add a unique sample ID for each sample (1000 maximum). The sample ID identifies the sample
location or other sample specific information.
As an alternative, import sample IDs from a spreadsheet file to the instrument. Refer to the expanded
user manual on the manufacturer's website to import sample IDs.
1. Push Sample ID.
2. Push Options>New.
3. Enter a new sample ID (20 characters maximum).
4. Push OK.
5. Select an option.
Option Description
Add Date/Time Adds the date and time that the sample was collected to the sample ID
(optional). The date and time entered for each sample ID show on the Sample
ID menu.
Add Number Adds a measurement number to the sample ID (optional). Select the first
number used for the measurement number (0 to 999).
The measurement number shows in parenthesis after the sample ID on the
home screen. Refer to User interface and navigation on page 9.
Add Color Adds a colored circle to the sample ID icon (optional). The sample ID icon
shows before the sample ID on the home screen. Refer to User interface and
navigation on page 9.
6. Push OK>Close.
7. To edit a sample ID, select the sample ID and then push Options>Edit>OK.
8. To delete a sample ID, select the sample ID and then push Options>Delete>OK.
Note: To delete all sample ID's, select the sample ID and then push Options>Delete All Sample IDs>OK.
6.2 Calibrate the turbidimeter with StablCal Standards
Calibrate the turbidimeter before it is used for the first time using the StablCal sealed vial standards
provided.
Calibrate the turbidimeter at least every 3 months or as specified by the regulating authority when
data is used for USEPA reporting.
The instrument is ready for calibration 60 minutes after start-up. Keep the instrument on 24 hours a
day if the instrument is used regularly.
Note: Unknown results may occur if standards other than the recommended calibration points are used. The
recommended calibration points (< 0.1, 20, 200, 1000 and 4000 NTU) provide the best calibration accuracy. Use of
standards other than StablCal, or user-prepared formazin, may result in less accurate calibrations. The
manufacturer cannot guarantee the performance of the instrument if calibrated with co-polymer
styrenedivinylbenzene beads or other suspensions.
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