Hach AquaTrend 51200, Инструкция по эксплуатации инструмента

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Section 2
Page 19
51350-18 Aquatrend Interface Network.fm
Device Descriptions
2.2.3 Portable AquaTrend Interface Module
The Portable AquaTrend Interface can access sensor menus for setup and
calibration but cannot perform network management functions. The Portable
AquaTrend Interface communicates directly to the sensor that it is attached to
without interpreting network commands from the Master AquaTrend Interface.
Once a network is configured using a Master AquaTrend Interface, the
Portable AquaTrend Interface can be used to display and log data from that
sensor in the absence of a Master AquaTrend Interface.
2.2.4 Sensor
The sensor, such as the 1720D Turbidimeter (shown at left), is the
device that analyzes the sample. Sensors may or may not contain an
AquaTrend Interface.
2.2.5 Signal Output Module (SOM)
Each SOM provides two relays, each with normally open and normally closed
contacts rated at a maximum of 5A/250 VAC, and two analog outputs,
selectable through the AquaTrend Interface keypad at either 4-20 or 0-20 mA.
Signal Output Module functionality can be provided either in an
AquaTrend/SOM or in a separate Signal Output Module. See the
Signal
Output Module Manual for detailed information.
2.2.6 Signal Input Module
The Signal Input Module (SIM) is configured as a sensor on the network
system and provides two 4-20mA analog inputs. These inputs can be used to
bring measurements from non-networked sensors into the network. The SIM
allows the user to set the value for zero and full-scale inputs and to define the
measurement names, units, and species. Two configurable setpoint alarms
can be set to trigger relays in a Signal Output Module. Refer to the
Signal
Input Module (SIM) Manual for additional information.
2.2.7 Serial I/O Module (SIO)
The AquaTrend Interface allows the review of data collected over the last 60
minutes, 24 hours, or 30 days. To download the data to a computer or printer,
a Serial I/O (SIO) Module must be installed. The SIO provides two-way
communication with a computer (PC) or one-way communication with a
printer. Use an SIO to permanently log measurement and diagnostic data to a
printer or computer. See the
Serial I/o Module Manual for detailed information.