Analg Activate analogue outputs

Serial Activate SDI-12 or 485 ports for data

GPRS         Activate GPRS modem and terminal port
 
C0d Channel 0 Real-time results display

C1d Channel 1 Real-time results display

C2d Channel 2 Real-time results display

C3d Channel 3 Real-time results display

C4d Channel 4 Real-time results display

C5d Channel 5 Real-time results display

C6d Channel 6 Real-time results display

C7d Channel 7 Real-time results display
Per
Freq
Pst
1S
5S
15S
1MIN
1HR
6HR
24HR
ID Range
0..255
1S
2S
3S
4S
5S
6S
7S
8S
5 S
60 S
360 S
500
600
700
800
900
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
Per = Period   Freq = Frequency in Hz  Pst = Percentage of range
Sensor activation period
Instrument identifier = 0 - 255
Select number and type of sensor output for data
transmission when operating in cable free mode
Updated rate for transmitted data
Analogue output scaling only
Low frequency
Vibrating wire sensor
Frequency range
DISP :=   This option is used to select the type of engineering results that are shown on the 7 segment display.

   Per   =   1/ Freq   = period of oscillation in milli Sec
   Freq =   XXXX.X  in Hz   
    Pst    =   Percentage of range

   the percentage of range is used to optimise the settings
                for the analogue output port in order to achieve the best result

Example. A vibrating wire sensor showing a PSt = 0.1 on the display and settings of  LF (Low frequency) of 500 Hz and range of 2000 Hz. This indicates that the results from the sensor is only operating over the lower 10% of the defined range i.e 500 - 700 Hz

For the assigned range above the analogue output port has a scaling of 0 - 2.5V DC using a 16 bit DAC (65536 levels) and will therefore have  0V = 500 Hz  & 2.5V = 2500 Hz, so

resolution = (2500-500)/65536  = 0.03 Hz.

However with the instrument adjusted to operate over the range of 500 to 700 Hz as observed above then

0V = 500 Hz  & 2.5V = 700 Hz so resolution =  200/65536
      =   0.003 Hz

PEROD := Sensor Excitation Period

This option defines the update period for the sensor excitation and measurement operation. There is always a trade off between the sensor update rate and the power supply requirements of the instruments.

For fast dynamic changes a fast sensor update rate is required but for slow static measurements only a low update rate is required.
User Command Summary
PEROD := Sensor Activation Period

         Defines the sensor scan period for the instrument.
          When fitted the analogue output channels are updated after each scan.


1S, 5S, 15S, 1min, 1Hr, 6Hr, 24Hr.



ID :=  System identifier number

Each instrument requires a unique identification number that is required to locate a specific instrument upon a network. Currently the identifier is an integer of range 0 .. 255 offering a maximum


TRa :=  Transmission Data Options.


To optimise the network bandwidth in order to ensure the maxium number of sensors can be deployed the User is allowed to select the number and type of sensor inputs used on the VibWire-108 for data transmission across a network.

1S.. 8S       represents  1 - 8 vibrating wire & temp sensors


             User Configurable from 1 to 8 channels
             includes temp/analogue input channels.


Tra.int  := Defines the rate of data transmission across a cable free network. The data is sent and confirmed by the gateway system if installed.

The transceiver fitted inside the VibWire-108 is powered on during the data transmission operation and powered off into a sleep mode between updates.

The faster the data transmission rate the greater the power required to drive the instrument. A compromise is needed to adjust power requirements to the amount of data to be transmitted to guarantee that not readings are lost.

5S, 60S, 360S
Basic
Disp
PEROD
ID
Tra
Tra.int
CH0.LF
CH0.RA
Continues for
all sensors