How it Works
Kobold
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PDA
Operating Manual
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Specifications
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User Manual
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Kobold PDA User Manual

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Operating Instructions
for
Pressure Transmitter
with Digital Display
Model: PDA
PDA
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.: +49(0)6192-2990
Fax: +49(0)6192-23398
E-Mail: info.de@kobold.com
Internet: www.kobold.com
PDA
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.
PDA
∅
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
∅
21,3
-0,2
G 1/2 A
* min.
­0,5
+1 +1
14
24
+0,2
7
R 16
z
G 1/2 A
* min.
­0,5
14
20 ,5
24
+0,2
∅
7
R 16
z
G 1/4 A
* min.
­+1
0,5
9
16
R 16
z
+0,2
∅
7
PDA
A
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...
Plug with cable ZUB-KAB-12K002
Connection example
PDA-15 Pin M12
+Vs
2
n.c.
GND
GND
3
Plug
1
+Vs
nalog Out
0(4)-20mA
4
PDA-15
Not connected
+Vs/+ Supply
0 V / GND
Output
0 V / GND
PDA
G
7.2. Connector pin assignment PDA-25, PDA-35…
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
Connection example
PDA-...P3M
+Vs
PNP out
Power
GND
Plug
Plug M12
2
3
5
ND
1
4
mA
+24 V
DC
0(4)-20 mA
PDA
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)
: Press for 3 Sec. set-up mode
: Display Low/High current value
Set-up mode
: Next level
: Change value
Any time:
3 sec.
or 20 sec. Without pressing any key
Normal Mode
PDA
9. Configuration
The following values can be programmed on the pressure transmitter:
Range of values Factory setting
Switch point (Spo) Hysteresis (HYS) Duo point (duo) Filter (Filt) Time response (dSE, drE) Contact-type (Con)
Start current (S-C) zero End current (E-C) span Start current selection (SCS) Filter (Filt) Start adjustment (S-A,) tare Change Code (CCo,)
-199…999 50,0
-199…0 000 Switch point…999 --- (inactive) 1/2/4/8/16/32/64 1 0,0…99,5 sec. 0,0 Normally open contact (no) or normally closed contact (nc) 0 to upper range value 0 0 to upper range value upper range value 0 / 4 mA 4 1/2/4/8/16/32/64 1 000 adjusted 000 - 999 000
no (normally open contact)
PDA
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
Save
[to the next main menu item]
or re-enter
PDA
9.2. Set-up mode for PDA-15
3 sec
Code input
Value setting
Code=
Start current
7sec
Value setting
Store
Start current
End current
Start current Selection
Filter
Start adjustment
7sec
Value setting
Store
End current
0-20
mA
7sec
4-20
mA
7 levels
Value setting
7sec
Value setting
Store start point
Code change
Value setting
page 10 PDA 01/06
PDA
9.3. Set-up mode for PDA-25 and PDA-35
3 sec
Codeeingabe
Setting parameter
Code=
Switch Point
Hysteresis
Duo-Point
On-Delay
Off-Delay
Setting parameter
Setting parameter
Setting parameter
Contact type
N.O. contact N.C. contact
PDA 01/06 page 11
Save
PDA
Start current
7sec
Setting parameter
End current
Start current
range
Filter
Set-up Startpoint
7sec
Setting parameter
0-20
mA
7sec
4-20
mA
7 levels
7sec
Setting parameter
Change code
Setting parameter
page 12 PDA 01/06
PDA
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.
PDA 01/06 page 13
PDA
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.
Display bar (°C)
Switching point
Hysteresis
Display bar (°C)
Hysteresis
Duo point
LED on
Time / t
LED on
LED on
Switching point
Hysteresis
Time / t
page 14 PDA 01/06
PDA
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.
PDA 01/06 page 15
PDA
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.
page 16 PDA 01/06
PDA
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
PDA 01/06 page 17
PDA
13. Order Codes
Example: PDA-15 3 R2 C315
Model/Output
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
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
Electrical
Connection
3=St. M12x1
ZUB-KAB-12D500 ZUB-KAB-12K002 ZUB-KAB-12K005 ZUB-KAB-12Q000
Connection Measuring range
N2=1/4 NPT N4=1/2 NPT
R2=G ¼ R4=G ½
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
page 18 PDA 01/06
PDA
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)
PDA 01/06 page 19
PDA
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
page 20 PDA 01/06
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