Defining 22 mA Signal Error Messages
The unit allows you to define if the following signal error indications: Near Zone and
Lost Echo, will be active when the current output reaches 22 mA. The default
setting enables 22 mA analog current and error messages to appear on its LCD
display.
Near Zone
- Whenever the distance is below the defined Dead Zone (depending
on the series you are using) message will be displayed on the LCD.
Lost Echo
- Whenever the echo is lost, or in cases when the measurement results
exceed the tank height or when a returned echo is not received message will
be displayed on the LCD.
You can choose to enable or disable these error messages and 22 mA analog
signal as follows:
•
d000:
Disable
•
E000:
Enable (default setting)
Refer to
Chapter 5, Troubleshooting
for a detailed list of the 22 mA signal error
messages.
• To Disable/Enable 22 mA Signal Error in the Unit:
Follow the directions given for
Entering Distance to Empty Level (Tank Height),
page 6. Instead of entering the tank height value, enter 00.16, and continue as
follows:
NOTE:
When the error signals are disabled the following current outputs will be
displayed:
(Level or flow measurement): F.F.F.F will indicate 20 mA and E.E.E.E will indicate
4 mA.
(Distance measurement): F.F.F.F will indicate 4 mA and E.E.E.E will indicate
20 mA.
Chapter 4: Open Channels (ULF)
This section describes how to set flow measurement parameters for open channels
and explains the flume/weir codes methodology used when setting up flow
measurements.
Selecting the Flow Measurement Settings
The Pr00 function enables you to select one of the preset flumes/weirs settings for
flow measurements. This function is available only in the ULF Open Channel
series. When setting flow measurement parameters in the Pr00 function, the
flume/weir type value (X) is entered first, followed by the letter (U) or (E) that
represents either American (USA) or European standard flume/weir. The code
value (YY) represents the appropriate flume/weir dimensions in the following
format: . The open channel types and codes are described in
Open Channels
Flow Measurement
.
NOTE:
Refer to
Chapter 3, Setting Up and Calibrating the Unit
, for an explanation
of accessing and using the functions menu.
All flow measurement values are displayed divided by 1000.
• To Select the Flow Measurement Settings:
Open Channels Flow Measurements
The flume/weir type code methodology used when setting up open channels is
based on three digits:
X(U/E)YY
Where:
X
refers to the particular flume/weir type
U/E
refers to either American or European standard flumes/weirs
YY
refers to the specific flume/weir dimensions
The types of flumes/weirs are available in American standard or European standard
(upon request). When working in American standard the default flow measurement
units will be
GPM
, and in European standard the default flow measurement units
will be
M³/Hr
.
Page 10
Press/Action
Display
Explanation
Choose disable.
Used to toggle between the modes.
Disables the 22 mA error messages.
or
Press/Action
Display
For example
:
Explanation
Required menu selection.
Indicates the measurement unit for flow
in GPM (American standard) or M
3
/h
(metric standard) (upon request).
Displays last saved flow measurement
setting or default value, with first digit
flashing U – American standard or E –
European standard (upon request).
Use to select a new type value (X).
Last two digits of the display flash.
Use to select a new flume/weir length
code (YY).
Selected values are saved.
or
or
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