Altering The Measuring Range; Altering The Calibration - HYDAC ELECTRONIC EDS 601 Manuel D'utilisation

Altering the setting of the display filter affects the interval in which the
displayed value is renewed.
"FAST"
"MED"
"SLOW"
The setting of the display filter does not affect the reaction time of the relay
outputs or the analogue output, but merely serves to steady the display in
the event of rapid pressure fluctuations.
The software version can only be viewed, not altered. The display serves
as a means of identifying the unit version in the event of queries.

Altering the measuring range

3.4.
Please note:
Example:
To alter the measuring range follow the same procedure as for the basic
settings, but do not release the PROG key when "BASE" stops flashing, only
when "RANG" stops flashing.
The measuring range has three settings:
1. The number of decimal places ("POIN.")
2. The lower measuring range limit ("RAN.L.")
3. The upper measuring range limit ("RAN.H.")
To select and alter the settings and to exit the setting follow the procedure
outlined in the "Basic settings" chapter. If the measuring range is changed so
much that the set switching points or switching hystereses are now outside the
new range, they are automatically set to the standard setting (switching
hysteresis: 1 %, switching point 1: 50 % and switching point 2: 75 %). The error
message "ER.04" is displayed to indicate this.
3.5.

Altering the calibration

The EDS 601 can be calibrated at any time without opening the housing.The
calibration covers 3 areas:
the sensor input
the analogue output for the "Volt" setting
the analogue output for the "M.Amp." setting
Note: The calibration menu should only be used by a qualified person.
Improper handling can lead to a loss of accuracy of the pressure
switch.
To access the calibration menu all 3 keys must be held down as the unit is
switched on. After approx. 5 seconds "CALI." begins to flash in the display. After
a further 5 seconds the flashing stops. If the keys are now released the
calibration menu can now be used.
Calibrating the sensor input
When the menu option "AD.L" is selected the current lower calibration value is
displayed for approx. 2 seconds followed by the current value of the A/D
converter. Set the pressure to the lower limit (i.e. 0 bar) and press the ∆ or ∇
key. If the value is within the permitted tolerance range "NEW" is displayed. The
lower limit is now calibrated. Otherwise, "FAIL" is displayed and the sensor will
not be calibrated.
The same applies for "AD.H" with regard to the upper calibration value.
Calibrating the analogue output
The menu option "OUTP" selects whether the output should be calibrated as
current output (setting "M.AMP") or voltage output (setting "VOLT"). The ∆ or ∇
key can be used under option "DA.L" and "DA.H" to change the value of the
analogue output. The value can be "DA.L" 0V or 4 mA and "DA.H" 10 V or
20 mA.
Exiting the calibration
This menu is not exited automatically. To exit the calibration select option "END",
set it to "YES" and press the PROG key.
- renews the display value every 0.2 seconds.
- renews the display value every 0.33 seconds.
- renews the display value every 0.66 seconds.
Altering the measuring range merely means that another
scale is selected. The nominal pressure range of the
pressure switch always remains the same and must not be
exceeded.
If the measuring range of an EDS 601-250-000 (nominal
pressure range 250 bar) is changed to 0 ... 738, the display
value of 738 corresponds to a pressure of 250 bar.
E
23