HYDAC EDS 601 - Manual (Page 10)

Zero point Final value
Sensor 30 .. 120
digits 850 .. 1015
Output current 0 .. 300 digits 300 .. 1020 (10 digits 0.11
V)
Notes:
l The calibration should only be altered by a qualified person.
l Calibration is possible in the following ranges:
(All details in digits, based on 10 bit values = max. 1023)
l The zero point always refers to the lower measuring range limit, i.e. to the
pressure value 0 bar, not to the measured value 0. (The two are only
identical if the measuring range begins at 0).
l The signal range can be made compatible by specifically changing the zero
point and the final value of the analogue output, e.g. to 0..5 V, 1..5 V,
0..20 mA, 0..10 mA
l If the measuring range is not given in bar, incorrect measuring ranges can
arise due to the conversion, e.g., a 40 bar pressure switch which is
designed to be operated in the converted unit kN has a measuring range of
5.14 kN due to the conversion. By re-calibrating the unit it can be operated
as a 5 kN unit. For this purpose, change the measuring range to 5.00 and
calibrate the final value of the sensor to this value. This is especially
sensible when making use of the analogue output, as the 10 V signal now
corresponds to a value of 5.00 kN, no longer 5.14 kN.
Disabling the programming
To prevent accidental re-programming of the settings, the programming can be
disabled. To enable or disable the programming the D and Ñ keys must be
pressed simultaneously. After approx. 5 seconds "PROG“ appears in the
display. Afterwards the condition of the programme disable is displayed and can
be changed with the D and Ñ keys.
l "ON“ means programming enabled
l "OFF“ means programming disabled
Once the PROG key has been pressed the condition of the programme enable
is saved in the memory and the unit reverts to the normal display (primary
display). If the programming is disabled ("PROG“ = "OFF“) all the settings can
still be viewed but not altered.
Error messages
Operating errors
ER 01 Error when setting the switching points and switch-back hystereses.
The switching hysteresis is either too large for the pre-set switching
point or the measuring range was altered so much that the
switching point lies outside the measuring range.
ER 02 Error when setting the measuring range.
ER 03 Error when setting the calibration data.
ER 04 After the measuring range was altered the switching points or
switching hystereses lay outside the new range and were
automatically corrected to the standard value by the EDS 601.
Data errors
For these errors to be understood, the following needs to be explained:
The settings with which the unit is operated are stored in a RAM. This memory
loses its contents, however, if the unit is no longer supplied with voltage. All
settings are stored in a second memory, an EEPROM. Whenever settings are
altered the data is written into the EEPROM from the RAM. When, however,
voltage is supplied they are then read back into the RAM from the EEPROM.
3.6.
4.
4.1.
4.2.
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