Cooper Instruments & Systems DFI 200 Hand Held Indicator User Manual
Page 9
CF 112
9
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
or
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
or
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.