Hach Lange 2100AN, Инструкция по эксплуатации инструмента

Страница: 87 / 108

SECTION 10,
continued
87
10.2.1 Initial ASC Entry
Up to 8 standards can be entered in either of the two Application Specific
Calibrations (user-defined methods denoted by “-1-” and “-2-” as shipped from
Hach). Standards must be entered in order of increasing turbidity.
A record of either ASC can be obtained via the printer for later analysis (see
Section 10.3 on page 89). In Table 4, a nonlinear calibration is constructed from
five standards of known mg/L concentrations. Corresponding NTU values are
determined by measuring the known standards with the 2100AN Turbidimeter
(verify instrument calibration with Gelex
®
Secondary Turbidity Standards prior to
making NTU measurements, refer to Section 3.2.5 on page 42).
The following step-by-step procedures (Sections 10.2.1.1 through 10.6)
demonstrate programming new ASC data, reviewing entered ASC data, editing an
ASC data point, deleting a single ASC data point, and deleting all ASC
data points.
10.2.1.1 Programming New ASC Data
1. Press the
UNITS/EXIT
key until the desired ASC unit name appears (-1- or -2-
factory defaults).
2. Press the
CAL/ZERO
key to enter the ASC calibration mode. The left digit of
the -1- or -2- will flash.
3. Use the Arrow Keys to enter a three-digit calibration name. This name cannot
be one of the predefined units (NTU, EBC, NEP, %T, A, CU, -1- or -2-). Press
ENTER
to accept the units name.
Note: The ASC calibration name can not be one of the predefined units (NTU, EBC, NEP,
%T, A, CU, -1- or -2-)
.
Error message
ERR12
is displayed at this point if any of these
predefined units are entered. Press
ENTER
to clear the error message and return to the
-1- or -2- entry modes.
4. The mode display flashes 01 to indicate that data point 1 is shown in the large
LED display. The blank spaces in front of the NTU units (
----- NTU
) indicate
no value is assigned to data point 1.
5. Press the Right Arrow key to initiate editing of data point 1. The large display
shows 0.0000 with the decimal flashing. Press
ENTER
to accept the decimal
point location. The left digit of the large display flashes. Press
ENTER
to
accept 0.0000 as the data point 1 value (NTU).
6. The large display shows
0.0000 MGL
with the decimal point flashing. Press
ENTER
to accept the decimal point location. The left digit of the large display
flashes. Press
ENTER
to accept
0.0000
as the MGL value of the first point.
7. The mode display flashes
02
to indicate that data point
2
is shown in the large
LED display. The blank spaces in front of the NTU units (
----- NTU
)
indicate no value is assigned to data point 2.
8. Press the Right Arrow key to initiate editing of point 2. The large LED display
shows
0.0000
with the decimal flashing. Press
ENTER
to accept the decimal
point location.