Page 24
FCO432 Users Guide Issue 1
Calibration
Furness Controls recommend that all pressure transmitters and flow devices are recalibrated
annually. For critical applications, it is advisable to check the calibration more frequently.
All calibration adjustments of 400 series pressure transmitters are performed through a PC using
the FCS541 Utility software/cable or using the optional keypad.
Separate functions allow for independent adjustment of the minimum and maximum output,
instrument gain and digital zero offset adjustment.
The instruments can be recalibrated provided suitable equipment is available. The basic
requirements are:
Pressure calibrator, such as the Furness Controls FCO560, FCO550 or FRS4
Accurate voltage or current meter
Suitable power supply
Furness Controls can provide instruments to fulfil all these functions.
Furness Controls offer a full recalibration and UKAS certification service.
Recalibration using Keypad
Check the minimum and maximum signal output levels by:
Using the
or
buttons to select
TEST
, to enter menu press
Select
MIN
for the minimum output
Select
MAX
for the maximum output
NOTE: Pressing the
button between tests will return the display to
TEST resulting in a false output reading.
If the output levels are incorrect
Enter Calibration Mode by holding down the
and
keys and reset the supply.
Set the minimum output level:
Using the
or
buttons select
DAC LO
, to enter menu press
Adjust the value using the
or
buttons
Press when
set
Press the
to exit the menu
Set the maximum output level:
Using the
or
buttons select
DAC HI
, to enter menu press
Adjust the value using the
or
buttons
Press
when set
Press the
to exit the menu
Gain Adjustment
If not already in Calibration Mode, hold down the
and
keys, and reset the supply.
Using the
or
buttons select
GAIN
, to enter menu press
Adjust the value using the
or
buttons to adjust any error
Press
when set
Press the
to exit the menu
Linearity and Temperature Compensation Adjustment
Linearity and temperature compensation adjustments should only be carried out at Furness
Controls, return to your supplier.
