Hach Sigma 950, Instrument Manual

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Programming Features
B.15.5 Event Log
The event log diagnostic provides a time/date stamped list of significant events occurring
in the flow meter. Review these events to find out when an event occurred and what
events preceded or followed the event of interest. Events may be viewed in chronological
order from the beginning or end of the event list by selecting
VIEW FROM START
or
VIEW
FROM END
respectively.
Fixed Alarms
Fixed alarms ( Table 38 ) show the On/Off status associated with the alarm. For instance,
U-sonic Echo Loss On at some time/date will appear. When the condition ends, U-sonic
Echo Loss Off will appear.
Channel Alarms
Channel alarms show the value that caused the alarm to occur or go away, and show a
status ON/OFF to indicate if the alarm occurred or went away at that time/date:
Event Log Channel Alarms:
B.16 Flow Totalizer
From the Main Menu, select
SETUP > ADVANCED OPTIONS > FLOW TOTALIZER.
The Flow Totalizer is a series of up to three numeric counters that keep track of the total
flow being measured. Two software totalizers are standard; a third mechanical totalizer is
available as an option. The two software totalizers consist of a resettable totalizer and a
non-resettable totalizer. Both software totalizers are set to zero upon program start.
Scaling multipliers are provided to allow you to tailor the totalizer response to meet the
requirements of the application. Some applications with high flow rates will require a high
scaling factor, while low flow rates will require a low scaling factor.
The scaling factor is displayed whenever a total flow number is displayed. As indicated in
the Status Screen below, the total flow is displayed as “TOTAL (x1000): 465 gal.”
Table 38 Event Log Fixed Alarms
Event Explanation
MEMORY BATTERY Internal memory battery is low.
MODEM FAILURE Modem chip/modem board failure.
U-SONIC ECHO LOSS No return signal detected.
XDUCER RINGING The return signal is detected too soon.
U-SONIC FAILURE Ultrasonic board detects an error.
RS485 TIMED OUT Communication problem with RS485.
• LEVEL • FLOW
• FLOW RATE OF CHG • pH
• RAINFALL • CH5
• CH1 • CH6
• CH2 • CH7
• CH3 • VELOCITY
• CH4 • TEMPERATURE