Users’ Manual
EDI-53 Series Digital Indicator
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The indicator needs to know the calibration coefficients for any transducer before it can compute the
parameter value in engineering units. So before you can use the engineering units display feature of the
indicator, the calibration coefficients of that particular transducer must have been stored in the setup
memory. The process of entering the calibration coefficients is called ‘Setup’ and is described in detail in
the section titled ‘Setup’.
For the time being we assume that the transducer for which we want to see the engineering units display
has already been setup.
With the transducer connected to the indicator check if you are getting a valid voltage reading. If yes then
press the ‘UNITS’ key. Display will show
NO Ch SELECTED!
Before you can use the engineering units display function first you must tell the indicator which channel
(or transducer) number to use for calculations.
To select the channel number press ‘CH NO’ key. Display will prompt
Ch # ? 0_
Enter the channel number corresponding to the transducer which you are measuring. Assuming that the
channel number is 4, press ‘4’ then ‘ENTER’. Display will show
#004: 0.04 kPa
The #04: symbol shows that the engineering units conversion is being done with the calibration
coefficients of channel 4. The value of the parameter is 0.04 and the engineering units is kPa (i.e. kilo
Pascal).
If the indicator fails to find any calibration coefficient associated with the channel number which you have
selected (i.e. the channel has not been setup) the display will flash an error message
NO TXDR SETUP !
and return back to VOLTS display mode. You can then either select the correct channel number (if you
have made an error in entry) or else go to setup and enter the transducer coefficients in any unused
channel.
4.11
Storing a reading
The EDI-53 indicator can store up to 6700 readings in any combination from any number of channels.
You can store 6700 readings of only any one transducer or you may store 14 sets of readings from 500
transducers. The memory used to store the readings is called the Data memory.
When you store any data, the indicator stores the channel number (i.e. transducer number), engineering
units value, date and time the reading was taken.
Before you can store a reading, you should select the channel number corresponding to the transducer
which you are measuring by pressing the ‘CH NO’ key. The display automatically changes to engineering
units display (known as ‘units mode’) and displays the measured parameter in your chosen engineering
units.
After the reading on display has stabilized press the ‘STORE’ key once to store the reading. The display
will flash
* DATA SAVED *
and revert back to units display. Remember, do not press the ‘STORE’ more than once. Every time you
press the ‘STORE’ key, another reading will be saved in the memory.
