Kobold PDA Series User manual

KOBOLD Instruments Inc. 1801 Parkway View Drive Pittsburgh, PA 15205
Phone [phone] • Fax [phone] • www.koboldusa.com
KOBOLD PDA Series Digital Pressure Transmitter
PDA-153 Series
User Instructions

Table Of Contents
FM Rev. 7/15/01
PDA
KOBOLD PDA Series Digital Pressure Transmitter
General . . . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 1
Specifications. . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 1
Mechanical Installation. . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 3
Electrical Installation . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 4
Operation . . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 5
Programming Functions. . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 5
Programming Menu Item Descriptions. . .. . . . . . . . . . . . . . . . . . . . . . 8
Maintenance . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 10
List Of Diagrams
Diagram 2.1 Dimensions. . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 3
Diagram 3.1 Electrical Connections. . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 4
Diagram 5.1 Displays and Controls. . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 5
Diagram 5.2 Programming Functions . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 5
Diagram 5.3 Sequence to Change a Value. . . .. . . . . . . . . . . . . . . . . . . . . . 6
Diagram 5.4 Programming Flowchart . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 7
Diagram 5.5 Start Current and End Current Example. . . . . . . . . . . . . . . . . 9
List of Tables
Table 2.1 Part Number Identification. . . . . . .. . . . . . . . . . . . . . . . . . . . . . 2

PDA
FM Rev. 7/15/01
CAUTION: For safety reasons, please read the cautionary information located at
the end of the manual, before attempting installation.
1.0 General
The KOBOLD PDA Series is a solid state, electronic pressure transmitter which employs a
ceramic sensor element as the heart of the sensing system. The ceramic sensing element
provides excellent corrosion resistance and very high cycle life with virtually no calibration
drift over its service life. The PDA’s microprocessor based electronics allow the user to
program zero point, transmitter span, dampening and lockout code.
In addition to the analog output, the PDA has a digital display for local indication of
pressure.
2.0 Specifications
Available Measuring Ranges: -30” Hg to 5800 PSIG
Display Type: 3 Digit LED
Accuracy: ±0.5% of full scale
Sensor Element: Piezoresistive ceramic element
Operating Temperature Range
Process Medium: -4 to 176°F
Ambient: -4 to 140°F
Overpressure Ratings
-30” HG to 1450 PSIG: 2X max range
>1450 to 5800 PSIG: 1.5X max range
Process wetted parts
Sensing Element: Ceramic
Connection: 316L stainless steel
O-ring: Viton
Housing Material: 304 SS
Electrical Data
Output Type: 4-20 mA, 3 wire
Max. Loop Burden: 500 ohms
Response Time: 50 mSec.
Power Supply Requirement: 24 VDC ±20%, 80 mA Max.
Electrical Connection: M-12, Micro-DC connect male
Electrical Protection: NEMA 4X/IP 65

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Table 2.1 Part Number Identification
PDA = Compact Electronic Pressure sensor
153 = 4-20 mA, three-wire Output Type
N2 = 1/4” NPT Fitting
N4 = 1/2” NPT
Range
H315 = -30” to 0” Hg
P025 = 15 PSIG
P045 = 30 PSIG
P055 = 50 PSIG
P065 = 100 PSIG
P075 = 150 PSIG
P085 = 200 PSIG
P095 = 350 PSIG
P105 = 600 PSIG
P115 = 1000 PSIG
P125 = 1450 PSIG
P135 = 2300 PSIG
P145 = 3600 PSIG
P155 = 5800 PSIG
E= Special Range
Available Measuring Ranges
Accessories
Part# 807.002 = Mating connector w/ 10 feet of cable
PDA - 153 - N4 - P065 Example

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Diagram 2.1 Dimensions
3.0 Mechanical Installation
The following general installation instructions and precautions must be followed to insure
proper, reliable operation:
1. Select a suitable location on the piping system for installation. Installation in a
location where sediments can collect in the pressure sensing port (such as the
underside of a horizontal piping run) will cause sluggish or faulty operation.
2. The ambient temperature range which the sensorsensor can withstand is -4°F
to +140°F. If the sensor is located outdoors in a cold environment the sensor
must be protected from excessively cold temperatures with insulated heat
tracing or by other suitable means. In hot environments the sensor should be
located in an area where the ambient temperature does not exceed 140°F.
3. If installing in a liquid process with pressure spikes and/or pressure pulsations,
install the sensor with a suitable pressure snubber or damage to the pressure
sensing element may result.
N1.75
N1.25
0.47
2.0
4.25
3.2 1.0
0.93
1.56
1/2” or 1/4”
NPT

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4.0 Electrical Installation
The following electrical installation instructions and precautions must followed to insure
proper sensor and analog output operation. Failure to follow these instructions may
result in irreparable damage to the sensor:
1. This device requires a power supply rated at 24 VDC ±20%. The current
requirement is 80 mA maximum. Ensure that the power supply used is capable
of providing this current and voltage.
2. In order to minimize electromagnetic noise pickup, a jacketed instrument and
control cable with shield should be used. The shield should be connected to
the power system earth ground at one end of the cable only.
Diagram 4.1 Electrical Connections
Typical Wiring
1
2
3
44-20 mA Out
Not
Connected
-DC
+ DC Supply
24 VDC ±20%
Optional Mating Connector
Brown = 1 = +DC
White = 2 = Not Connected
Blue = 3 = -DC
Black = 4 = 4-20 mA out
PDA-153...
1
4
3
+DC
4-20 mA out
-DC
Input Device
+
-

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5.0 Operation
Diagram 5.1 Displays and Controls
5.1 Programming Functions
The PDA digital pressure transmitter is programmed via membrane push-buttons on the
faceplate of the device as shown in the following figure.
Diagram 5.2 Programming Functions
.
Press to enter a menu
programming branch,
or change a display value
Hold for 3 seconds
to enter programming
menu. Press to step
through menu
During Normal Operation
:
:
Press for 3 Sec to Enter Setup Mode
During Setup Mode
: Next Step
: Change Values
Press 3 sec
Exit Setup
Or for 20 sec
Press no buttons

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5.1.1 Changing Values in Setup Mode
When in the Setup Mode the actual values of zero, span, dampening and other functions
are adjusted as required by the user. From the main menu (e.g. Change Code “CCo”),
press the “” button to adjust that functions value. The following diagram shows the
sequence of steps required to change a value.
Diagram 5.3 Sequence to Change a Value
Speichern
Save Value
Press “” to get from the main menu
Set the first digit
Set the second digit
Set the third digit
Set the decimal point
location
reset value
or

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5.1.2 Programming Flow Chart
Diagram 5.4 Programming Flowchart
TO BEADDEDIN FUTUREREVISION

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5.2 Programming Menu Item Descriptions
After the  Button is depressed for three seconds to enter the setup mode, and the
lockout code is entered (if lockout is enabled), the programming menu is accessed.
Diagram 5.4 provides a flowchart of the programming menu. Section 5.1.1 and diagram
5.2 and 5.3 provide details on how to change the value of each menu item parameter.
The following is a detailed description of each menu item.
5.2.1 Cod - Code
If the lockout feature was enabled during a prior setup, the user code which was selected
at that time must be entered. Section 5.1.1 ‘Changing Values in Setup Mode’ on page 6
provides steps required to enter the value.
5.2.2 S - C - Start Current
This menu item allows the user to input the pressure which corresponds to the current
transmitter’s zero point (4 mA or 0 mA point). Typically this value is zero (i.e. zero PSIG =
4 mA). Any number between -199 and 999 within the measuring range of the devise can
be entered. Additionally, a decimal point can be added if desired. To perform the Start
Current adjustment, if desired, use the  button to get to the S - C menu item. Then
press the button and hold down for 7 seconds to enter the S - C branch. After
entering, Section 5.1.1 ‘Changing Values in Setup Mode’ on page 6 provides steps
required to change a value. The transmitter output will remain at its zero point (4 mA or 0
mA) until the system pressure rises above the Start Current setting.
5.2.3 E - C - End Current
This menu item allows the user to input the pressure which corresponds to the current
transmitter’s maximum span (20mA point). The device is preset at the factory with this
value set to the transmitters full scale measuring range. Any number between -199 and
999 within the measuring range of the device can be entered. Additionally, a decimal
point can be added if desired. To perform the End Current adjustment, if desired, use the
button to get to the E - C menu item. Then press the button and hold down for 7
seconds to enter the E - C branch. After entering, Section 5.1.1 ‘Changing Values in
Setup Mode’ on page 6 provides steps required to change a value.
5.2.4 SCS - Start Current Select
This menu item allows the user to select a transmitter zero point of either 0 mA or 4 mA.
A zero point of 4 mA is preset at the factory. To change this setting, if desired, use the 
button to get to the SCS menu item. Then press the button and hold down for 7
seconds to enter the SCS branch. Use the button to change the value. Use the 
button to accept the value. Use the  button to proceed through the programming menu

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Example: A PDA series pressure transmitter is purchased with a measuring
range of 0-150 PSIG (The Max. measuring range can be determined
by the model number code, or by applying power to the device.
When power is first applied the Max. measuring range flashes on the
display for 3 seconds.) From the factory, the Start Current (S - C)
value is preset at 00.0 and the End Current (E - C) value is preset at
150. The Start Current Select (SCS) value is set at 4 for 4 mA.
It is desired to field program the transmitter’s output such that the
zero point is at 10 PSIG (S - C adjusted to 10.0) and the span point is
at 100 PSIG. (E - C adjusted to 100). The transmitter output Vs.
pressure for the factory settings and the field modified settings are
shown in Diagram 5.5
5.2.5 Filt - Filtering
This menu item allows the user to average the measured output over 1, 2, 4, 8, 16, 32 or
64 samples. Section 5.1.1 ‘Changing Values in Setup Mode’ on page 6 provides steps
required to change a value. Adding filtering provides a more stable display and output for
systems in which pressure pulsations are a problem. The larger the number of samples
the more stable the display and output. A Filt value of “1” shuts off the filtering.
When filtering is being used, the PDA series employs an integrated overshoot function
which detects any overshoot above 6.25% and processes that measured value without
filtering. This feature allows the sensorsensor to differentiate between pulsations and
actual system pressure changes and process the pressure change signals without
filtering. This greatly enhances the sensor’s response time when the filtering function is
being used.
Current (mA)
Pressure (PSIG)
0
4
20
10 100 150
Figure 5.5 Start Current and End Current Example
Factory Setting
Field Setting

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5.2.6 S -A - Zero Adjust
This menu item allows the user to zero the pressure sensing element if desired. The
ceramic pressure sensing element used by the PDA series takes about 15 minutes for
the zero to stabilize after power is applied. Therefore if zeroing is desired, for best results
wait for at least 15 minutes after power is applied to do so. To perform the zero adjust,
use the  button to get to the S - A menu item. Then press the button and hold down
for 7 seconds. The display will flash “000”. Then press the button to continue through
the setup menu.
5.2.7 CCo - Change Code
This menu item allows the user to set a pass code which will lock out the programming
functions. This protects the device from un-authorized access to the setup menu. Section
5.1.1 ‘Changing Values in Setup Mode’ on page 6 provides steps required to change a
value. The code can be any value from 000 to 999. A code of 000 disables the lockout
function. A value other than 000 will require entry of that code to access the setup menu.
6.0 Maintenance
The PDA series pressure sensorsensors have no moving parts therefore are virtually
maintenance free. Depending on the type of media, the pressure sensing port may
become clogged over time. Sluggish response to changes in system pressure would be
evidence of this. If clogging occurs, remove the sensor from the system and clean the
pressure sensing port using compressed air or a water stream. If clogging occurs
frequently, installation of a diaphragm seal should be considered.

CAUTION
PLEASE READ THE FOLLOWING WARNINGS BEFORE ATTEMPTING
INSTALLATION OF YOUR NEW DEVICE. FAILURE TO HEED THE
INFORMATION HEREIN MAY RESULT IN EQUIPMENT FAILURE AND
POSSIBLE SUBSEQUENT PERSONAL INJURY.

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•User's Responsibility for Safety: KOBOLD manufactures a wide range of
process sensors and technologies. While each of these technologies are
designed to operate in a wide variety of applications, it is the user's
responsibility to select a technology that is appropriate for the application,
to install it properly, to perform tests of the installed system, and to maintain
all components. The failure to do so could result in property damage or
serious injury.
•Proper Installation and Handling: Use a proper thread sealant with all
installations. Take care not to overtighten the fittings. Always check for
leaks prior to system start-up.
•Wiring and Electrical: Section 2.0, Specifications and Section 4.0,
Electrical Connections, provide the voltage and current limitations and the
wiring for the various sensor types. The sensor electrical ratings should
never be exceeded. Electrical wiring of the sensor should be performed in
accordance with all applicable national, state and local codes.
•Temperature and Pressure: Section 2.0, Specifications, provides the
temperature and pressure limits for each model. Operation outside these
limitations will cause damage to the unit and can potentially cause personal
injury. Fluid should never be allowed to freeze inside the sensor.
•Material Compatibility: Make sure that the model which you have
selected is chemically compatible with the application liquids. While the
meter is liquid and spray resistant when installed properly, it is not
designed to be immersed.
• Flammable, Explosive and Hazardous Applications: The PDA series is
not an intrinsically safe or explosion proof design. They should not be used
in installations in which an instrinsically safe or explosion proof design is
required.
•Make a Fail-safe System: Design a fail-safe system that accommodates
the possibility of device or power failure. In critical applications, KOBOLD
recommends the use of redundant backup systems and alarms in addition
to the primary system.