Kobold PDA User manual

Operating Instructions
for
Pressure Transmitter
with Digital Display
Model: PDA
O
Or rd de er r f fr ro om m: :
C
C A A B Br ri ig gg gs s
C
Co om mp pa an ny y
622 Mary Street; Suite 101; Warminster, PA 18974
Phone: [phone] - Fax: [phone]
Sa[email protected] - www.cabriggs.com

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1. Contents
1. Contents........................................................................................................2
2. Note ............................................................................................................3
3. Instrument Inspection....................................................................................3
4. Operating Principle........................................................................................3
5. Regulation Use..............................................................................................4
6. Mechanical Connection.................................................................................4
7. Electrical Connection ....................................................................................5
7.1. Connector pin assignment PDA-15......................................................5
7.2. Connector pin assignment PDA-25, PDA-35…....................................6
8. Commissioning..............................................................................................7
8.1. Key function .........................................................................................7
9. Configuration.................................................................................................8
9.1. Value setting ........................................................................................9
9.2. Set-up mode for PDA-15....................................................................10
9.3. Set-up mode for PDA-25 and PDA-35 ...............................................11
10. Main Menu Items.........................................................................................13
10.1. Switching point...................................................................................13
10.2. Hysteresis ..........................................................................................13
10.3. Duo point ...........................................................................................13
10.4. Switching characteristic .....................................................................14
10.5. Time response ...................................................................................15
10.6. Contact-type ......................................................................................15
10.7. Current output....................................................................................15
10.8. Filter...................................................................................................16
10.9. Start adjustment.................................................................................16
10.10. Change Code.................................................................................16
11. Maintenance ...............................................................................................16
12. Technical Information..................................................................................17
13. Order Codes ...............................................................................................18
14. Dimensions .................................................................................................19
15. Declaration of Conformance .......................................................................20
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com

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2. Note
Please read these operating instructions before unpacking and putting the unit
into operation. Follow the instruction precisely as described herein.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the
machines fulfil the EWG-machine guidelines.
3. Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
•Pressure Transmitter with Digital Display model: PDA
•Operating Instructions
4. Operating Principle
KOBOLD pressure indicator/transmitter series PDA, are cost effective electronic
pressure indicator/transmitters with digital indication of actual pressure.
An analogue output (0)4 - 20 mA is available for remote transmission of the
measured value. The device is optionally available in addition with a switching
output.
A piezzo resistive ceramic cell is used. The units can be used where high
switching accuracy is needed. Long-term stability, repeatability and the compact,
robust design makes it an ideal unit for use in OEM applications.

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5. Regulation Use
Pressure transmitters are used to measure pressure in vessels, hydraulic and
pneumatic plant, refrigeration equipment and so forth.
The devices may only be used for liquids to which the probe and housing
materials are chemically resistant.
6. Mechanical Connection
Pressure taps should be prepared according to the following specifications for the
screw-in holes.
Gaskets to DIN 16 258 or formed gaskets are recommended for sealing British
Standard Parallel Pipe thread (BSPP). The required tightening torque depends on
the material and shape of the gasket used, and on the pressure port in the
pressure sensor. National Pipe Thread (NPT) fittings should be sealed with an
appropriate pipe thread sealant. Exposure to violent shocks and heat radiation
should be avoided.
The permissible service conditions for the pressure sensors should be observed.
When the pressure connection has been made and the power supply connected,
the sensor is ready for operation.
Sealing according DIN 16288 Sealing with Flat gasket
G 1/2 A
R 16
z
* min.
∅
7 +0,2
G 1/2 A
R 16
z
* min.
∅
7 +0,2
∅
21,3-0,2
G 1/4 A
R 16
z
* min.
∅7
20
,5
14
5
14
5
19
24
5
24
5
13
16
5
9
+0,2
-
0,5 -
0,5
-
0,5
+1
+1 +1

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7. Electrical Connection
Important! Make sure that the voltages in your plant correspond
with the voltages on the nameplate.
•Make sure that the electrical supply lines are dead.
•The supply is connected through connector socket M12x1 as shown in the
wiring diagram below.
•Mating plugs with different cable lengths are available as options.
Important! The instrument electronics may be damaged if the
cable connections are connected incorrectly.
7.1. Connector pin assignment PDA-15...
Connection example
PDA-15
Pin M12
PDA-15
Not connected
+Vs/+ Supply
0 V / GND
Output
0 V / GND
Plug with cable ZUB-KAB-12K002 Plug
1
2
34
+Vs
A
nalog Out
0(4)-20mA
n.c.
GND
+Vs
GND

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7.2. Connector pin assignment PDA-25, PDA-35…
Connection example
PDA-25... PDA-35...
PNP-Output NPN-Output
+24 VDC +24 VDC
0 V / GND 0 V / GND
0(4)-20 mA 0(4)-20 mA
0 V / GND 0 V / GND
Plug with cable ZUB-KAB-12K002 Plug
mA
+Vs
G
ND
Power
1
2
34
+24 V
DC
PNP out
GND
PDA-...P
3
M
Plug M12
0(4)-20 mA
5

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8. Commissioning
Caution! Please note that if operated at high system temperatures
the case surface and controls can become very hot.
Connect the pressure transmitter according to the wiring diagram above
and supply it with the specified voltage.
The measuring range (upper range value) is displayed for 3 seconds after
switch on.
8.1. Key function
Normal mode (measuring mode)
Set-up mode
:
Press for 3 Sec. set-up mode
: Display Low/High current value
: Next level
: Change value 3 sec.
Normal Mode
Any time:
or 20 sec.
Without pressing any
key

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9. Configuration
The following values can be programmed on the pressure transmitter:
Range of values Factory setting
Switch point (Spo) -199…999 50,0
Hysteresis (HYS) -199…0 000
Duo point (duo) Switch point…999 --- (inactive)
Filter (Filt) 1/2/4/8/16/32/64 1
Time response (dSE, drE) 0,0…99,5 sec. 0,0
Contact-type (Con) Normally open contact
(no) or normally closed
contact (nc)
no (normally open
contact)
Start current (S-C) zero 0 to upper range value 0
End current (E-C) span 0 to upper range value upper range value
Start current selection (SCS) 0 / 4 mA 4
Filter (Filt) 1/2/4/8/16/32/64 1
Start adjustment (S-A,) tare 000 adjusted
Change Code (CCo,) 000 - 999 000

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Save
9.1. Value setting
Value setting can be selected with the "" key in the main menu item (for
example: End current, "E-C"). The standard sequence for changing parameters is
given in the flowchart below.
[from the main menu item]
Set 1st position
Set 2nd position
Set 3rd position
Adjust decimal point
Save selected value
or re-enter
[to the next main menu item]

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9.2. Set-up mode for PDA-15
7 levels
Value setting
Value setting
Value setting
Value setting
Value setting
Value setting
Start adjustment
Filter
Start current
Selection
End current
Start current
Code input
Code change
7sec
3 sec
Code=
Store
start point
7sec
7sec
7sec
Store
Start current
Store
End current
4-20
mA
0-20
mA

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9.3. Set-up mode for PDA-25 and PDA-35
Contact type
N.O. contact
N.C. contact Save
Off-Delay
Setting parameter
Setting parameter
On-Delay
Duo-Point
Setting parameter
Hysteresis
Switch Point
Codeeingabe
3 sec
Code=
Setting parameter

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Change code
Setting parameter
Setting parameter
Set-up
Startpoint 7sec
Filter
7 levels
Start current
7sec
range
mA
0-20
mA
4-20
7sec
Setting parameter
End
current
7sec
Setting parameter
Start current

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10. Main Menu Items
10.1. Switching point
In menu option, "SPo" the switch point can be set. A value between -199 and 999
can be selected. Additionally, a decimal place can be assigned to this value. The
decimal point can be set after the first or the second place (e.g. 10.0 or 1.00). If
the displayed value exceeds or equals the adjusted switch point and the window
point is not set, then the switch will be active. An active switch is signalled by the
LED being lit.
In case the hysteresis is set to zero, then the switch will be inactive if the value is
lower than the switch point.
10.2. Hysteresis
After setting the switch point, a hysteresis “HYS“ can be entered as a negative
value in the menu. The hysteresis default value is zero. However, this can lead to
an unwished switching behaviour during the operation, if the measuring signal
keeps varying around the switch point or the window point. An increase in
hysteresis will suppress the effect. The hysteresis refers to both the switch point
and the window point (switch point minus hysteresis, window point plus
hysteresis).
Example: Switch point: 100 bar; Hysteresis: -2.5 bar
The switch will become active at and above 100 bar when the
indicated value goes up, and will become inactive at 97.5 bar when the
value goes down.
10.3. Duo point
Apart from the switch point a window point (“duo“) can be defined. It must be
larger than the switch point. With both the "window point" and the "switch point"
set, the measured value can be monitored within a certain range. If a window
point is set, the state of the switch underneath the switch point is similar to the
one above the window point.
If the window point (duo) is smaller or equal to the switch point, an
error message (Er4) is momentarily displayed. Afterwards its value
is deleted and thus its function becomes ineffective (this is valid for
the window point as well as for the switch point setting).
This parameter setting is similar to the switch point setting. The window point is
needed for processes, during which the pressure must be monitored within or
outside a certain range.

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Example: Switch point: 100 bar; Window point: 150 bar; Hysteresis: -1 bar
The switch changes state when pressure exceeds 100 bar. At this moment, if the
pressure remains between 99 (100-1) bar and 151 (150+1) bar, the switch
remains in the active state (LED on). If the pressure increases crossing 151 bar
limit or (decreases to go below 99 bar limit), the switch will revert to an inactive
state.
10.4. Switching characteristic
The following diagram clarifies the switching behaviour of the pressure switch.
The contact closes (type of contact: N.O.) when exceeding the switch point or
falling short of the window point. It opens again only after exceeding the window
point plus the hysteresis or falling below the switch point minus the hysteresis. An
LED signals the switching status of the pressure switch.
Time / t
Display
bar (°C)
Switching point
Hysteresis
LED on
Time / t
Display
bar (°C)
Switching point
Hysteresis
LED on
Hysteresis
Duo point
LED on

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10.5. Time response
Using the menu items “dSE”, “drE” it is possible to set the switch-on-delay
(delay set) and the switch-off-delay (delay reset).
The delay set causes delayed switching of the output if the switching point is
exceeded.
The delay reset causes a delayed resetting of the output when falling short of the
switching point – hysteresis.
The setting range for both parameters is 0.0 ... 99.5 seconds. The step rate is 0.5
seconds.
With these two functions, it is also possible to suppress temporary disturbances.
10.6. Contact-type
In menu option "Con", the transistor switching output function is set. The
switching function changes from
N.O. contact
to
N.C. contact and back.
N.O. contact means: Contact closes on exceeding the switch point.
N.C. contact means: Contact opens on exceeding the switch point.
10.7. Current output
The current output is set in menu items
"S-C" Start current indicated value < > 0(4) mA
"E-C" End current indicated value < > 20 mA
"SCS" Start current selection (0-20 mA or 4-20 mA).
The indicated value at which 0(4) mA is transmitted is entered in menu item Start
current. The indicated value at which 20 mA is transmitted is entered in the menu
item End current.

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10.8. Filter
The filter function "Filt" generates the sliding average value from the measured
values. This acts to dampen the output in a system that has pressure pulsations.
The following values are available (see Section 9 Settings):
1 / 2 / 4 / 8 / 16 / 32 / 64
The filter value determines the dynamic behaviour of the indicated value: high
values mean a slow display with smoother response. The filter is disabled if a
filter value of "1" is selected. In other words, the indicated value is equal to the
unfiltered measured value (no dampening occurs).
The integrated step detector responds to a measured-value step change greater
than approximately 6.25% of the upper range value. When a measured-value
step change is detected, the actual measured value is displayed immediately.
10.9. Start adjustment
The zero-point can be recalibrated when the sensor is in the unpressurised
state. As a security precaution, the operator must press and hold the "" key for
7 seconds. This must be done before he can activate the value setting menu item
"S-A".
10.10. Change Code
Change code "CCo" protects the device against unauthorised changing of the set
device parameters by allowing the operator to enter a secret code. If the code set
is different then 000, the operator must enter the set code “Cod” before entering
the set-up mode.
11. Maintenance
The instrument requires no maintenance when properly used. Deposits, due to
fouled media, can give rise to invalid measured values.

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12. Technical Information
Housing: Stainless Steel 1.4305
Connections: G 1/4 or G 1/2 male; St. St. 14404
Option: 1/4 or 1/2 NPT,
others on request
Gasket: FPM (Option: EPDM)
Sensor element: piezzo resistive ceramic cell
Indication: 3-digit LED, 7mm
Resolution: max. 0.01 bar (depending on measuring range
and measured value)
Max. temperature: Media: -20 to +80 °C
Ambient: -20 to +80 °C
Max. over pressure: up to 60 bar: 3 times
from 100 bar: 2 times of the range
400 bar: 1.5 times of the range
Supply voltage: 24VDC ± 20%
Power consumption: approx. 120 mA
(without switching output)
Electr. connection: Plug M12x1
Settings: programmable with 2 buttons:
(standard) - Switching point
-Hysteresis
-4-20 or 0-20 mA
-Start point/ end point (current)
-Filter
-Zero point
-Security code
Over range/
under range indication: on LED-display
Load: max. 500 Ω
Switching output: PNP or NPN semiconductor
(factory set),
max. 300 mA, short-circuit proof
Contact: N/O / N/C, duo
programmable
Output indicator: 1 LED
ON/OFF-switch. delay: 0,5...99,5 s (separately adjustable)
Response time: 0.5 s
Accuracy: ±0.5 % f. s., (±1 % of full scale for
spans ≤1,6 bar)
Protection: IP 65

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13. Order Codes
Example: PDA-15 3 R2 C315
Model/Output Electrical
Connection Connection Measuring range
PDA-15=Standard 0(4)-20 mA
PDA-25=0(4)-20 mA,
PNP-Switching output
PDA-35=0(4)-20 mA,
NPN-Switching output
3=St. M12x1
R2=G ¼
R4=G ½
N2=1/4 NPT
N4=1/2 NPT
C315=-1...0 bar
B025= 0...1 bar
B035= 0...1,6 bar
B045= 0...2,5 bar
B055= 0...4 bar
B065= 0...6 bar
B075= 0...10 bar
B085= 0...16 bar
A095= 0...25 bar
A105= 0...40 bar
A115= 0...60 bar
A125= 0...100 bar
A135= 0...160 bar
A145= 0...250 bar
A155= 0...400 bar
Additional: Electrical connection
Description Model
M12x1 socket with terminal
M12x1 socket with 2 m cable
M12x1 socket with 5 m cable
M12x1 socket with Quickon-plug
ZUB-KAB-12D500
ZUB-KAB-12K002
ZUB-KAB-12K005
ZUB-KAB-12Q000

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14. Dimensions
Info! The matching M12x1 box with 2 m cable for the M12x1 plug
connector is available under order code ZUB-KAB-12K002. (Fig.
with box)

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15. Declaration of Conformance
We, KOBOLD-Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that the product
Pressure Transmitter with Digital Display model PDA
to which this declaration relates is in conformity with the standards noted below:
EN 61326: 1997 +A1: 1998 +A2: 2001
Electrical equipment for measurement, control, and laboratory use
- Noise immunity: according EN 61326/A1 Amendment A table A.1
Criteria: according table 2, continuos not monitored operation
- Generic emission standard: according EN 61326/A1
Limit values: according table 4, equipment of class B
EN 61010-1 1993
Safety requirements for electrical equipment for measurement, control and
laboratory use
Also the following EWG guideline is fulfilled:
2004/108/EC EMC Directive
Hofheim, 16. Jan. 2007
H. Peters M. Wenzel
General Manager Proxy Holder