Instruction Manual
PSA10
Electronic pressure switch with display
PKP Prozessmesstechnik GmbH
Borsigstraße 24
D-65205 Wiesbaden-Nordenstadt
Tel.: ++49-(0)6122-7055-0
Fax: ++49-(0)6122-7055-50
Email: info@pkp.de
Table of Contents
Safety Information................................................................................................................................2
Installation............................................................................................................................................4
Electrical Connection...........................................................................................................................4
Controls of the PSA10..........................................................................................................................5
Digital display.......................................................................................................................................5
Hysteresis function...............................................................................................................................6
Window function..................................................................................................................................7
Main menue..........................................................................................................................................8
Extended functions...............................................................................................................................9
Calibration of zero point.....................................................................................................................10
Programming lock..............................................................................................................................11
Error messages....................................................................................................................................11
Safety Information
General Instructions
To ensure safe operation, the device should only be operated according to the specifications in the
instruction manual. The requisite Health & Safety regulations for a given application must also be
observed. This statement also applies to the use of accessories.
Every person who is commissioned with the initiation or operation of this device must have read
and understood the operating instructions and in particular the safety instructions!
The liability of the manufacturer expires in the event of damage due to improper use, nonobservance of this operating manual, use of insufficiently qualified personnel and unauthorized
modification of the device.
Proper Usage
The electronic pressure switches PSA10 are designed to control the pressure of liquids or gases
which do not attack the device materials. All other usage is regarded as being improper and outside
the scope of the device.
In particular, applications in which shock loads occur (for example, pulsed operation) should be
discussed and checked in advance with our technical staff.
The series PSA10 pressure switches should not be deployed as the sole agents to prevent dangerous
conditions occurring in plant or machinery. Machinery and plant need to be designed in such a
manner that faulty conditions and malfunctions do not arise that could pose a safety risk for
operators.
Dangerous substances
PSA10 Instruction manual 05/2018 page 2
For dangerous media such as e.g. Oxygen, Acetylene, flammable or toxic substances as well as
refrigeration systems, compressors, etc. must comply with the relevant regulations beyond the
general rules.
Qualified Personnel
The PSA10 devices may only be installed by trained, qualified personnel who are able to mount the
devices correctly. Qualified personnel are persons, who are familiar with assembling, installation,
placing in service and operating these devices and who are suitably trained and qualified.
Inward Monitoring
Please check directly after delivery the device for any transport damages and deficiencies.
Additional with reference to the accompanying delivery note the number of parts must be checked.
Claims for replacement or goods which relate to transport damage can only be considered valid if
the delivery company is notified without delay.
PSA10 Instruction manual 05/2018 page 3
Installation
The pressure switch PSA10 can be mounted directly via the pressure connection or indirectly on a
hydraulic block using a hose or a minimess line.
The PSA10 must be fitted using a suitable open-end wrench (across flats 27) on the hexagon nut of
the pressure connection.
Do not install the PSA10 by gripping the housing, as this would damage the housing or the entire
instrument.
Electrical Connection
Attention: Prior to the electrical connection of the device, it must be ensured that the supply voltage
matches that required and the supply voltage is switched off.
PIN assignment of M12x1 connector:
PSA10 Instruction manual 05/2018 page 4
Controls of the PSA10
2 keys (↓↑ and E) for adjusting the switch points, switch-back
points and additional functions
4-digit digital display
LED backlight to indicate switch points
(red = actice / green = inactive)
Function of keys:
• Im Menü absteigen
• Wert vergrößern
• Wird die Taste länger gedrückt, erfolgt ein Schnelldurchlauf der Parameterwerte
• Auswahl Menüpunkt
• Wert bestätigen
Digital display
Once the power supply has been switched on, the device briefly flashes "EdS", and then begins to
show the actual pressure.
To check the unit of measurement being used for the pressure indication, press the right-hand key.
Depending on the setting, bar, PSI or MPA will be shown
If the actual pressure exceeds the instrument's nominal pressure it can no longer be displayed. The
nominal pressure flashes in the display. As a result, when the menu point Max Value (Hi) is selected, the value of the highest measured pressure which has been stored flashes until the instrument is
reset by “reset Min-/Max-value” (re.HL) or “reset” (rES).
If the actual pressure is less than 0.6 % of the nominal range, 0 bar is displayed.
PSA10 Instruction manual 05/2018 page 5
Hysteresis function
The PSA10 has 2 switch outputs. The following settings can be made under the basic settings:
Example for switch point 1 (normally closed and normally open function):
Switch point setting (SP)
One switch point and one switch-back point can
be set for each switching output.
The particular output will switch when the set
switch point is reached and switch back when the
pressure drops below the switch-back point.
Abbreviations:
"SP1", "SP2" = Switch point 1, switch point 2
"RP1", "RP2" = switch back point 1, switch back point 2
"HNO", = normally open with hysteresis function
"HNC" = normally closed with hysteresis function
NOTE:
It is only possible to set the switch point (SP) if it is higher than the respective switch-back point
(RP). In the case of low SPs we recommend setting the RP first.
PSA10 Instruction manual 05/2018 page 6
Window function
The window function allows you to monitor a range. An upper and a lower switch value can be
entered for each switch output. These values determine the range.
The relevant output will then switch when the pressure enters this range.
When the pressure leaves this range, i.e. when the switch-back point has been reached, the output
switches back. The lower switch-back value is just below the lower switch value. The upper switchback value is just above the upper switch value. The range between the switch value and the switchback value forms a safety margin which prevents unwanted switching operations from being
triggered (such as those triggered by the pulsations of a pump).
Example for switch point 1 (normally closed and normally open function):
Abbreviations:
"FH1", "FH2" = upper switch value 1 / upper switch value 2
"FL1", "FL2" = lower switch value 1 / lower switch value 2
"FNO" = normally open when window function is active
"FNC" = normally closed when window function is active
NOTE:
It is only possible to set the switch point (SP) if it is higher than the respective switch-back point
(RP). In the case of low SPs we recommend setting the RP first.
The window function only works properly (switching on and off) if all switch values (including the
safety margin) are above 0 bar and below the nominal pressure range.
PSA10 Instruction manual 05/2018 page 7
Main menue
If no key is pressed for approx. 60 seconds, the menu closes automatically, and any changes that
may have been made will not be saved.
If both keys are pressed at the same time, the menu closes automatically and any changes made are
saved.
When an adjusted parameter is confirmed, the set value is displayed for a second before returning to
the relevant menu point.
PSA10 Instruction manual 05/2018 page 8
Extended functions
PSA10 Instruction manual 05/2018 page 9
Calibration of zero point
The function "Cali" enables the calibration of the sensor zero point. The current pressure is saved as
the new zero point. This is possible in the range +/- 3% of the instrument rated pressure. "neW" appears in the display when a calibration is carried out in the permitted range, otherwise "Err" is dis played.
This function is useful, for example, if there is always a residual pressure left in the system which
should be displayed as 0 bar.
CAUTION:
Following a zero point adjustment, for example on a 600 bar instrument, a pressure of up to 18 bar
will be displayed as 0 bar. Before any work is carried out on the hydraulic system, ensure that the
system is depressurised.
PSA10 Instruction manual 05/2018 page 10
Programming lock
In order to prevent unauthorised adjustment of the device, a programming lock can be set. If the
menu item "PrG" is set to "Loc" in the extended menu, the programming lock is set. All values can
still be read but can't be edited. When trying to edit a value by means of the arrow keys, "Loc" is
displayed as long as the key is pressed. The functions "reS" and Rs.HL" are locked as well.
Error messages
If an error is detected, a corresponding error message appears that must be acknowledged by pressing any key.
Possible error messages:
E.10 A data error was detected in the saved settings. This could be due to strong electro-
magnetic interference or a component fault.
Action:
Press (E) and confirm "RES" by pressing "Yes". The factory settings will be restored
for all adjustable parameters and all minimum and maximum values will be deleted.
Enter the data again from the beginning.
E.12 An error was detected in the saved calibration data. This could be due to strong elec-
tromagnetic interference or a component fault.
Action:
Disconnect then reconnect the supply voltage to the instrument. If the error persists,
the instrument must be returned to the factory for recalibration or repair.
E.21 A communication error was detected within the instrument. This could be due to
strong electromagnetic interference or a component fault.
Action:
Press (E). If the error persists, disconnect then reconnect the supply voltage to the instrument. If the error still persists, please contact our service department.
PSA10 Instruction manual 05/2018 page 11
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