Hach TL2350 Manuel D'utilisation De Base page 12

6.1.1 Configure the measurement settings
Select the reading mode, measurement units, data log settings and more.
1. At the main reading screen, push Options>Reading Setup.
2. Select an option.
Option Description
Reading Sets the reading mode to single, continuous or RST mode. Single (default)—The
Mode measurement stops when the reading is stable. Continuous—The measurement
continues until the user pushes Done. RST—The Rapidly Settling Turbidity (RST)
mode calculates and continuously updates the turbidity reading of the sample to a
confidence of 95%, based on the accumulated trend of the real time measured
values. The RST mode is best used on samples that settle rapidly and
continuously change in value. The reading is based on a correctly prepared
sample that is homogeneous at the beginning of the reading. It is best applied to
samples that are greater than 20 NTU. The sample must be mixed thoroughly by
inversion immediately before inserting it into the instrument. Signal Avg—The
turbidity reading that shows on the display is an average of the values measured
during the time interval selected. Options: For single measurement mode, 5 to
15 seconds. For continuous measurement mode, 5 to 90 seconds.
Unit Selects the measurement units that show on the display and that are recorded to
the data log. Options: NTU (default), EBC, Abs or %T.
Ratio Sets the ratio mode to on (default) or off. When set to off, an indicator shows on
the reading window.
Note: The ratio off mode is only valid for turbidity measurements that are less than 40 NTU.
Bubble Sets the bubble reject to on (default) or off. When set to on, high turbidity readings
Reject caused by bubbles in the sample are not shown or saved to the data log.
Data Log Sets the data log settings. Auto Store—Measurement data is automatically
Setup recorded in the reading log. Default: On. If Auto Store is off, push Options>Store to
manually save a reading in the data log. Send Data Format—Sets the output
format of measurement data that is sent to external devices (CSV, XML or BMP).
Default: XML. Print Format—Sets the output format of measurement data that is
sent to a printer (Quick Print or Detailed Print (GLP)). Comments—Lets users add
comments to log entries. Auto Send—Measurement data is automatically sent to
all of the devices (e.g., printer and USB flash drive) that are connected to the
instrument after each measurement. Options: Off, new file or continue file: off—do
not auto send data, new file—send data and save it in a new file, continue file—
send data and save all data in one file.
6.1.2 Add operator IDs
Add a unique operator ID for each person who will measure samples (30 maximum). Select an icon,
operator password and security level for each operator ID.
1. Push Login.
2. Push Options>New.
3. Enter a new operator ID (20 characters maximum), then push OK.
4. Push the LEFT and RIGHT arrows to select the icon for the operator ID (e.g., fish, butterfly or
soccer ball).
5. Push Operator Password, then enter a password for the operator ID.
Note: Passwords are case sensitive.
6. Push Security Level, then select the security level for the operator ID.
• Off—The operator cannot change the settings or do the tasks in the Security settings that have
a security level of one key or two keys.
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