Hach Sigma 950, Инструкция по эксплуатации инструмента

Страница: 91 / 146

89
Programming Features
B.5 Graphic Display Averaging
The Sigma 950 Flow Meter can display a graph that consists of a maximum of
180 individual dots. Since a 24-hour period could contain as many as 1,440 data points
(assuming a one-minute recording interval, one reading each minute) it would be
impossible to plot every data point on the graph.
When more than three hours (more than 180 minutes worth) of data is graphed the data
points must be averaged. When graphing a partial day of three hours or less, all data
points are graphed with no averaging.
When viewing a graph with more than 180 data points, zoom in to the area of interest
(using the Graph Partial Day option) so all of the individual data points are displayed.
B.6 Options Features
The Options menu can set the:
• Time and Date for the real time clock in the Sigma 950 Flow Meter.
• Program the advanced features of the flow meter.
• Select level sensor when multiple sensors are installed.
B.7 Setting the Time and Date
From the Main Menu, select
OPTIONS > TIME/DATE.
Starting with the hours and minutes, use the numeric keypad to enter numbers in the
flashing cursor. Use the
+/-
keys to toggle between 12-hour and 24-hour formats. Use the
soft keys on the right of the display to toggle the AM/PM and month fields to the desired
selection. Press
CLEAR ENTRY
to clear all numeric fields. When complete, press
ACCEPT
to save the changes.
B.8 Purge Line (Applies to Bubbler Depth Only and Bubbler Area/Velocity
Modes Only)
Note: The Sigma 950 Flow Meter can be programmed to automatically purge at a present interval.
For more details, see Depth Only and Bubbler Area/Velocity Calibration on page 46 .
From the Main Menu, select
OPTIONS>PURGE LINE.
This function will cause a solenoid valve to open for approximately one second,
temporarily connecting the bubbler line to the full reservoir air pressure. This causes a
high pressure air purge of the bubbler line to blow out any silt or debris that may clog the
line and impede the normal flow of air.
11:00 AM 21 - APR - 01 OPTION MENU
TIME / DATE
SETUP
ADVANCED
OPTIONS
READY TO START
11:00 AM 21 - APR - 01 TIME / DATE
ACCEPT
CHANGE
AM / PM
_ _: _ _ AM _ _ -APR- _ _
CLEAR
ENTRY
MODE: 12-HR FORMAT
CHANGE
MONTH
USE +/- KEY TO CHANGE 12/24 HR FORMAT