Users’ Manual
EDI-53 Series Digital Indicator
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should always quote this number to enable our service engineers to know which version of the indicator
you have.
The display will freeze after showing the current date. The date is shown in day/month/year format. The
indicator is waiting for you to either accept the date or set the date if incorrect. For the time being press
‘ENTER’ to accept. The display will show
Time: 09:08:45
The exact time shown may be different. Again, the indicator is waiting for your response. Press ‘ENTER’.
The display will show something like
I/P: 0.0097 V
where the actual figure will vary depending on the transducer connected to the indicator.
We call the above sequence of display messages as the normal power on sequence. At this point the
indicator is ready to take measurements.
4.3
First time use
If this is the first time you are going to use the indicator since it was dispatched from the factory you need
to do some special tasks before the indicator becomes operational. These tasks are
Start the internal real time clock.
Clear the setup and data memory.
In the first step you will start the real time clock which is stopped before shipping from factory to conserve
battery power.
In the second step you will erase (or clear) the setup and data memory of the indicator.
The EDI-53 indicator has a setup memory which can store the calibration coefficients for up to 500
transducers and a data memory which can store up to approximately 6700 readings.
Before using the EDI-53 indicator for the first time the internal data memory and setup memory has to be
cleared of all existing data.
Both these operations are described in more detail in the following sub sections.
4.4
Starting and stopping the Real Time Clock
The indicator has an internal real time clock / calendar which keeps time and maintains date information.
The real time clock (also known as RTC) is a sealed module with a separate small internal lithium
battery. When the indicator is on the RTC draws power from the main indicator power supply. With the
indicator powered off the RTC draws power from its own lithium battery.
However, with the indicator powered off the lithium battery has a life of less than 2 years. Indicators
which are used for only a few hours each month are likely to lose time when kept in off condition. If the
indicator is not going to be used for a long time (say for more than a month) it is prudent to shut down the
clock to conserve battery power. Before using the indicator again, the clock can be restarted and set.
The EDI-53 indicator provides two functions for starting and stopping the clock (RTC). These functions
are accessible from the test mode. The test mode operation is discussed in more detail later on in this
section. For the present follow the steps outlined below.
To enter the test mode, turn on power to the indicator while keeping the ‘VOLTS’ key pressed. Release
the ‘VOLTS’ key as soon as the SELF TEST message is flashed. The display will flash a series of
messages and then prompt
Enter TEST # ?
