Hach Lange 2100AN, Инструкция по эксплуатации инструмента

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SECTION 5,
continued
57
Note: Measurements in the Flow
mode of operation can be made with
Signal Averaging and Ratio modes
on or off. Signal Averaging and
Ratio modes should be on for most
measurements. Signal Averaging
and Ratio on or off must be selected
prior to entering the Flow mode.
1. Select the desired settings for Signal Averaging on or off and Ratio on or off.
2. Select the printer and print interval desired (see Section 6.3 Printer).
3. Press the
FLOW
key. The Flow annunciator lights and the display prompts
either
STAT?
(for static measurement) or
DYN?
(for dynamic measurement).
4. Use the up or down arrow key to select
STAT
, then press
ENTER
.
5. Set the fill time. The display shows
MM-SS FIL
(or an actual fill time if one
has been programmed previously).
Press
ENTER
to accept the displayed setting. Or, use the right arrow key to
select the digit to edit, then the up or down arrow keys to edit the fill time.
Press
ENTER
to accept the new time.
6. Set the measurement time. The display shows
MM-SS MEA
(or an actual
measurement time if one has been programmed previously). Press
ENTER
to
accept the displayed setting. Or use the right arrow key to select the digit to
edit, then the up or down arrow keys to edit the measurement time. Press
ENTER
to accept the new time. After
ENTER
is pressed, the Flow Valve opens
and remains open for the programmed fill time interval. Then the Flow Valve
closes, and the turbidimeter completes sample measurements for the
programmed measurement time.
7. The result of the measurement is locked in the display, and transmitted to the
built-in printer (and/or through the RS232 output to an external printer or
computer if connected) at the end of the measurement time. The
FLOW
annunciator flashes.
Note: The result of measurement remains locked in the display until the
FLOW
key is
pressed to exit the
FLOW
mode or the
ENTER
key is pressed to repeat the programmed
measurement cycle (programmed fill time is not repeated).
8. Press
ENTER
to repeat the measurement without the fill time delay. The
instrument repeats sample measurement. The Flow Valve is open during the
programmed measurement time. The result of measurement is locked in the
display, and transmitted to an active printer or computer.
Note: To repeat the cycle (including the programmed fill time), press he
FLOW
key to exit
the Flow mode. Press the
FLOW
key again to reenter the Flow mode, and press the
ENTER
key to accept previous settings for fill time and measurement time.
9. Press
FLOW
to exit the Flow mode. The Flow annunciator goes out, and the
instrument display becomes active again.
10. To purge the Flow-Cell system of sample, press and hold the valve control
switch on the Flow Valve Module in the Momentary Open position until the
system drains.
Note: During short periods of time when the Flow-Cell system is not in use, flush the
system with distilled or deionized water, and leave it full of the flush water. If the system
is not used for a long period of time, disassemble and clean thoroughly.