SECTION 3, continued
35
3.1.7 Using the PRINT Key
The PRINT key initializes several data transmittal activities. Press the PRINT key
to print the displayed value, units of measure, sample number, and time and
date to the internal printer and/or RS232 output. See Section 6.4.2 on page 71 for
detailed setup instructions.
A print interval can be specified using the instrument setup protocol (see
Section 6.4.2.3 on page 71). Press the
PRINT key to initiate the print interval after
it is selected. The
PRINT annunciator flashes to indicate a print interval is specified
but not started. The annunciator lights when a print interval setup is being
executed.
A calibration data report is generated by pressing the
PRINT keywheninthe
Calibration mode. Holding the
PRINT keydownwhileturningoninstrument
power prints a diagnostic report. The report can be transmitted to an external
printer or computer if the external RS232 output is selected. Pressing the
PRINT key while in the setup mode prints a report referencing setup functions to
setup numbers.
3.1.8 Using the CAL/Zero Key
A (Nephelometric) calibration is initiated by pressing the CAL/Zero key when
working in the NTU, EBC, NEPH or Application Specific measurement modes.
The unit of calibration is NTU based on Formazin. Refer to SECTION 10 on
page 85 for detailed instructions.
Pressing
CAL/Zero at the end of a calibration sequence saves new calibration
values and the instrument returns to the last-used measurement mode. Refer to
Section 3.2.4 on page 39 for detailed calibration instructions.
Pressing the
CAL/Zero key while in the %T, Absorbance, or color mode begins the
“analytical zero” (100 %T, 0.0 Absorbance, or 0.0 CU respectively). Install a
sample cell containing the reference solution and press
ENTER. The instrument
counts from
30 to 0 while the “analytical zero” is in progress.
3.1.9 Using the ENTER Key
Press the ENTER key to accept the displayed or edited setup information or to
begin measurement of a calibration standard.
Pressing the
ENTER key clears stored data from the Signal Averaging memory
buffer and quickly updates the display when measuring samples. This feature is
useful particularly when measuring samples with large differences in Turbidity.
3.1.10 Using the Arrow Keys
The up, down and right arrow edit the displayed value during calibration and
increment through the calibration standards. They also edit the display any time an
individual digit is flashing. Therefore, the arrow keys are referred to as edit keys.
The right arrow key also can be used during calibration to ignore the dilution
water turbidity standard (Standard
00). This procedure is not recommended except
in special applications. Refer to Section 3.2 through Section 3.3.4 for details.
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