Cooper Instruments & Systems DFI 200 Hand Held Indicator User Manual

Page 9

CF 112

Version 3.1-0

4.11 Alternative mV/V calibration method

Display:

Range:

Default Value:

This function provides an alternative calibration method to the

and

method of scaling, note that

only one of these methods should be used. The

method allows the known rated mV/V value of the load cell

to be entered followed by the maximum capacity of the load cell in whatever measuring units are required. The
mV/V value is entered to 3 decimal places (3 decimal places will automatically appear up when you enter

Maximum

value is 9.999. If an the mV/V figure is greater than the DFI 200 allows you can divide the

and

values by the same amount to give the correct scaling e.g. for a display with an 18.000mV/V

input with a full scale reading of 1000 you could enter the

value as 9.000 and the

value as 500.

Note: Steps 1 to 6 which follow can be completed with or without a load cell being connected; step 7 required the
load cell to be connected. The

procedure is as follows:

1. At the

function press, then release,

and

simultaneously to enter the ECAL mode.

2. The display will show the previous mV/V value (or the mV/V value calculated by the DFI 200 if its last scaling

was via

and

). Use the

pushbutton to enter the known rated mV/V value of your load

cell.
3. Press F to store this mV/V value in memory.
4. The display will now show

followed by the previous scale value.

5. Use the

pushbutton to enter the full scale value of your load cell in the measuring units you are using

e.g. kilograms, tons etc.
6. Press F to accept this new value. Note: it is important that the actual full scale value for the cell, i.e. maximum
rated load, is entered and not simply the maximum load it will be used to in your application.
7. Once the

value has been entered connect the cell to the instrument. With zero load on the cell use

either the

function or operate the Zero button. This operation is required to give a zero load

reference point to the instrument to eliminate any zero offsets present in the load cell.