Hach Sigma 950, Инструкция по эксплуатации инструмента

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97
Programming Features
To reset both software totalizers at once:
Start a program with the
RUN/STOP
key.
View Totals
To view the current totals of both the resettable and non-resettable totalizers, press
VIEW
TOTALS
from the Totalizer menu. Both totalizer values will appear.
B.17 Screen Saver Mode
From the Main Menu, select
SETUP > ADVANCED OPTIONS > SCREEN SAVER MODE.
The power required to properly light the LCD can consume valuable battery life. Screen
Saver Mode is a power saving feature.
B.18 Battery Power
When the flow meter senses that it is operating on battery power, Screen Saver Mode
conserves battery life by automatically turning the LCD display off after 3 minutes of
keypad inactivity. Pressing any key will turn the LCD display back on. No configuration is
required; the meter automatically senses ac or battery operation on power up.
B.19 ac Power
When operated under ac power, Screen Saver Mode can be enabled or disabled
manually. Enabling the Screen Saver when operating on ac power will prolong the life of
the LCD display by minimizing its use.
To change the Screen Saver mode:
1. Highlight
SCREEN SAVER MODE
on the Advanced Options Menu using the
UP
and
DOWN
arrow soft keys, then press
SELECT
.
2. Press
CHANGE CHOICE
to select a new Screen Saver Mode (Enabled or Disabled).
Press
ACCEPT
to save the changes.
B.20 Set Point Sampling
Set point sampling allows the control of an automatic liquid sampler from up to 14
different sources individually or simultaneously. Upon reaching a user-defined set point
trigger, the flow meter provides an output signal at the Sampler Interface. This signal can
be used to tell a sampler such as the Model SD900 Sampler that a set point condition
has been reached and samples should be taken.
Set Point sampling defines a set of limits that inhibit sampling until an upset condition
occurs, causing the limits to be exceeded. In this manner, time and money and collecting
and testing samples that are within limits is not wasted, because sampling is enabled only
when the waste stream falls outside the set points.
Table 39 shows all possible sampling
triggers and appropriate settings.
Table 39 Sampling Triggers
Sampling Trigger Settings
Level High and/or Low condition, deadband
Flow High and/or Low condition, deadband
Flow Rate of Change High condition within time interval
Temperature High and/or Low condition, deadband
pH High and/or Low condition, deadband
Rainfall High condition within time interval