Imp Lite manual

IMP Lite
INSTRUCTION MANUAL
IMP Lite (FIRST EDITION)
July 2011
Part Number M-082-0-001-0P
COPYRIGHT
© Pulsar Process Measurement Limited, 2005-11. All rights reserved. No part of this publication may
be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in
any form without the written permission of Pulsar Process Measurement Limited.
WARRANTY AND LIABILITY
Pulsar Process Measurement Limited guarantee for a period of 2 years from the date of delivery that it
will either exchange or repair any part of this product returned to Pulsar Process Measurement
Limited if it is found to be defective in material or workmanship, subject to the defect not being due to
unfair wear and tear, misuse, modification or alteration, accident, misapplication or negligence.
DISCLAIMER
Pulsar Process Measurement Limited gives nor implies any process guarantee for this product, and
shall have no liability in respect of any loss, injury or damage whatsoever arising out of the
application or use of any product or circuit described herein.
Every effort has been made to ensure accuracy of this documentation, but Pulsar Process
Measurement Limited cannot be held liable for any errors.
Pulsar Process Measurement Limited operates a policy of constant development and improvement and
reserves the right to amend technical details as necessary.
TECHNICAL ENQUIRIES
Please contact Pulsar Process Measurement Limited for technical support.
COMMENTS AND SUGGESTIONS
If you have any comments or suggestions about this product, then please contact:
Pulsar Process Measurement Limited
Cardinal Building
Enigma Commercial Centre
Sandy’s Road
Malvern
Worcestershire
WR14 1JJ
United Kingdom
Pulsar Process Measurement Inc.
PO Box 5177
Niceville
Tel: + 44 (0) 1684 891371
Fax: + 44 (0) 1684 575985
Tel: + 1 850 279 4882
Fax: + 1 850 279 4886
Web Site: http://www.pulsar-pm.com
Web Site: http://www.pulsar-pm.com
e-mail: [email protected] (general
information)
e-mail: [email protected] (general
information)
e-mail: support@ pulsar-pm.com (product
support)
e-mail: support.usa@ pulsar-pm.com (product
support)
FL 32578-5177
USA
Contents
Chapter 1 Start Here… ......................................................................................................................................... 1
About this Manual ........................................................................................................................................... 1
About the IMP Lite Level Monitoring System .................................................................................................. 2
Functional Description ............................................................................................................................ 2
Product Specification....................................................................................................................................... 4
Physical .................................................................................................................................................... 4
Environmental.......................................................................................................................................... 4
Performance ............................................................................................................................................. 4
Standard features...................................................................................................................................... 4
PC interface.............................................................................................................................................. 4
EC Declaration of Conformity........................................................................................................................ 5
Chapter 2 Installation............................................................................................................................................ 7
Power Supply Requirements........................................................................................................................... 7
Terminal Connections ................................................................................................................................... 12
Loop Resistance..................................................................................................................................... 12
Preparation for Operation.............................................................................................................................. 13
Maintenance................................................................................................................................................... 13
Chapter 3 How To Use Your IMP Lite ................................................................................................................ 15
Operating the Controls .................................................................................................................................. 15
Display ................................................................................................................................................... 15
Run Mode .............................................................................................................................................. 15
Program Mode ....................................................................................................................................... 16
Button Functions.................................................................................................................................... 16
How to Access Program Mode..................................................................................................................... 17
Parameter Defaults ........................................................................................................................................ 18
Factory Defaults..................................................................................................................................... 18
Chapter 4 Getting Results With Your IMP Lite ................................................................................................... 19
Setting up Your Application ......................................................................................................................... 19
Empty Distance...................................................................................................................................... 19
Span........................................................................................................................................................ 19
Near and Far Blanking .......................................................................................................................... 19
Using the 4-20 mA Output............................................................................................................................ 19
Setting Security Passcodes ............................................................................................................................ 20
Using A Passcode .................................................................................................................................. 20
Changing The Passcode ........................................................................................................................ 20
Resetting Factory Defaults ............................................................................................................................ 21
Checking the Information Specific to your IMP Lite ...................................................................................... 21
Checking the Software Revision and Serial Number .......................................................................... 21
Using the RS232 Serial Interface.................................................................................................................. 21
Chapter 5 Parameter Guide ................................................................................................................................ 23
Parameter Listing........................................................................................................................................... 23
Application (APP) Menu .............................................................................................................................. 23
P100 Mode of Operation ....................................................................................................................... 23
P104 Measurement Units ...................................................................................................................... 23
P105 Empty Level ................................................................................................................................. 23
P106 Span .............................................................................................................................................. 24
P107 Near Blanking Distance ............................................................................................................... 24
P108 Far Blanking Distance ................................................................................................................. 24
Volume (UoL) Menu .................................................................................................................................... 25
P600 Vessel Shape ................................................................................................................................ 25
P601-P603 Vessel Dimensions............................................................................................................. 27
P604 Calculated Volume....................................................................................................................... 27
P605 Volume Units ............................................................................................................................... 28
P606 Correction Factor ......................................................................................................................... 28
P607 Max Volume ................................................................................................................................ 28
Display (DiSP) Menu .................................................................................................................................... 29
P800 Display Units................................................................................................................................ 29
P801 Decimal Places ............................................................................................................................. 29
P808 Fail-safe Mode ............................................................................................................................. 29
P809 Fail-safe Time .............................................................................................................................. 29
mA Output (LOOP) Menu............................................................................................................................ 30
P834 mA Low Level ............................................................................................................................. 30
P835 mA High Level ............................................................................................................................ 30
P838 mA Low Trim .............................................................................................................................. 30
P839 mA High Trim.............................................................................................................................. 30
P840 mA Fail-safe Mode ...................................................................................................................... 30
Compensation (CoP) Menu .......................................................................................................................... 31
P851 Measurement Offset..................................................................................................................... 31
P852 Temperature Source ..................................................................................................................... 31
P854 Fixed Temperature ....................................................................................................................... 31
P860 Sound Velocity............................................................................................................................. 32
P645 Vapour Temperature Compensation ........................................................................................... 32
Stability (StA) Menu ..................................................................................................................................... 33
Damping................................................................................................................................................. 33
System (SyS1) Menu .................................................................................................................................... 33
P921 Enable Code ................................................................................................................................. 33
P922 Passcode ....................................................................................................................................... 33
P926 Software Revision ........................................................................................................................ 33
P928 Serial Number .............................................................................................................................. 33
P930 Factory Defaults ........................................................................................................................... 34
Test (tESt) Menu ........................................................................................................................................... 34
P991 Hard Test ...................................................................................................................................... 34
P992 mA Out Test ................................................................................................................................. 34
Chapter 6 Troubleshooting ................................................................................................................................ 35
Parameter Record................................................................................................................................................. 36
Chapter 1
Start Here…
Congratulations on your purchase of a Pulsar IMP Lite Level Monitoring
System. This quality system has been developed over many years and
represents the latest in high technology ultrasonic level measurement and
control.
It has been designed to give you years of trouble-free performance, and a
few minutes spent reading this operating manual will ensure that your
installation is as simple as possible.
About this Manual
It is important that this manual is referred to for correct installation and
operation.
There are various parts of the manual that offer additional help or
information as shown:
Tips
TIP
At various parts of this manual you
will find tips to help you.
Additional Information
Additional Information
At various parts of the manual, you will find sections
like this that explain specific items in more detail.
Page1
About the
IMP Lite Level Monitoring System
Functional Description
The IMP Lite level monitoring system is a highly developed ultrasonic level
measurement system which provides non-contacting level measurement for
a wide variety of applications in both liquids and solids.
Easy calibration and maintenance free “fit and forget” performance mean
that you can install the IMP Lite Level Monitoring System rapidly and with
confidence.
The IMP Lite operates on the principle of timing the echo received from a
measured pulse of sound transmitted in air and utilises “state of the art”
echo extraction technology.
IMP Lite comes in three models: Lite 3 with a range from 0.20m (0.66 feet)
to 3.00m (9.84 feet), Lite 6 with a range of 0.3m (0.98 feet) to 6.00m (19.69
feet) and Lite 10 with a range of 0.3m (0.98 feet) to 10.00m (32.81 feet).
Page2
The IMP Lite can show level, space, distance, on the display. There is an
isolated 4-20 mA output that can be connected to a remote chart recorder or
PLC, to monitor level, space or distance, dependant on the measurement
mode selected, and provides a ‘fault condition’ alarm of either 3.5mA or
22mA.
The IMP Lite lid has an integral LCD display and 4 buttons which are used
for programming purposes when in Program Mode and as hot keys
providing additional information whilst in Run Mode.
Page3
Product Specification
Physical
o Dimensions 186mm (5.24 inches) O/A height x 133mm (7.32 inches)
O/A diameter.
o Cable entry 2 off cable glands 4.5 -10mm. (Torque to 2NM)
o Mounting 1.5" BSP/NPT (IMP3 and 6 models) 2" BSP/NPT (IMP 10)
o Weight approx 1KG
Environmental
o Temperature range -40 to +65°C. Ambient
o Temperature range -40 to +80°C. Transducer
o IP rating IP67
Performance
o Digital processing of echo
o Input Voltage range 11-30volts DC. Current output 3.5-22mA.
o Measurement range 200mm (0.66 feet) to 10000mm (32.81 feet),
(dependant on model) accuracy ± 0.25% or 6mm whichever is greatest.
o Isolated 4-20mA output resolution 5uA.
o Temperature compensation via internal digital temperature sensor with ±
0.5°C accuracy.
o Time from power up to stable reading 10 seconds.
Standard features
o RS232 connection for diagnostics and software updates
o 4 Digit LCD display
o 4 button keypad for parameter entry
PC interface
o All parameters can be accessed and changed via IMP view software.
o Trace viewing ability.
Page4
EC Declaration of Conformity
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Page6
Chapter 2
Installation
Power Supply Requirements
The IMP Lite operates from a DC supply of 11 –30V and will typically draw
less than 0.06A.
All electronic products are susceptible to electrostatic
shock, so follow proper grounding procedures during
installation.
The compact one-piece construction of the IMP Lite can be mounted easily
using the integral nose thread (1.5" or 2" BSP/ NPT, dependent on model).
When choosing a location to mount the Imp, bear in mind the following:
• For access to the LCD display and programming buttons it is
recommended that you mount it in an area which is easily
accessible.
• The ultrasonic signal path should be free of falling material and
obstructions such as pipes, beams etc.
• The IMP 3 should be mounted at least 20cm (0.66 feet) above the
maximum level of the material and be perpendicular to the surface.
Whilst the IMP 6 and 10 should be mounted at least 30cm (0.98
feet) above the maximum level of the material and be perpendicular
to the surface.
• The ambient temperature is between -20ºC and 65ºC.
• There should be no high voltage cables or electrical inverters close
by.
Page7
Dimensions
The dimensions of the IMP Lite are as shown below.
1.5" BSP/NPT – IMP 3 & 6
2" BSP/NPT – IMP 10
Page8
Outdoor and Open Vessel Installation
The IMP Lite can be simply mounted on a bracket, suitable for the
application and secured using the thread located at the top of the transducer
(2"BSP/NPT).
Care should be taken to ensure that the IMP Lite is not installed in direct
sunlight, in order to avoid errors in the measurement of ambient
temperature.
Attention should also be taken, when mounting the unit, to ensure that
strong windy conditions are avoided, wherever possible, to prevent
abnormal operation.
IMP
Model
Range
L=
Blanking
Lite 3
3 metres
(9.84 feet)
200mm
(0.66 feet)
Lite 6
6 metres
300mm
(19.69 feet) (0.98 feet)
Lite 10
10 metres
300mm
(32.18 feet) (0.98 feet)
“L” should as a minimum be at least that as detailed in the table above,
but can be greater if required.
Closed Vessel Installation
“L” should as a minimum be at least that as detailed in the table above, but
can be greater if required. The IMP Lite can be simply screwed into a flange
and secured using the thread located at the top of the transducer (1.5" or
2"BSP/ NPT, dependent on model).
Where possible use a flange made of a synthetic material such as PVC, in
cases where a metal flange is used it is advisable to fit a suitable gasket
between the flange of the IMP Lite and the connection to the vessel.
Page9
Stand Pipe Installations
When mounting the IMP Lite to a standpipe care should be taken to ensure
that the standpipe is of sufficient diameter with reference to its length, see
the table below for details:
Dia. (D)
mm
inches
80
3
100
4
150
6
200
8
Max. Length (L)
mm
inches
220
8
300
12
420
16
560
22
When using a standpipe, fixed to the top of a vessel, ensure that the open
end of the standpipe is clear of any obstructions such as weld seams, gaskets
etc. in order to avoid unwanted signal returns.
If using standpipes which extend in to the vessel, beyond the blanking
distance, but not as far as the empty level, then the open end of the standpipe
should be cut to an angle of 45o.
The maximum
level (100% of
Span) is inside the
Blanking Distance
Pipe should be free
of obstructions
such as weld seams
Correct
standpipe
installation
Page10
Cable Entry
The IMP Lite Series has two M16 cable entries, fitted with a suitable gland,
to ensure moisture protection is maintained.
Terminal Connection Details
Wiring details are also given on the terminals under the access cover.
Page11
Terminal Connections
Terminal 1
+ ve: Direct Current (DC) input (11-30VDC)
Terminal 2
- ve: Current Output (4-20mA)
Loop Resistance
The maximum cable resistance allowable can be calculated from the graph below.
For example if an IMP Lite were supplied from a 24VDC, the maximum total
cable resistance is 590 ohms, for a typical 77 ohm /km cable this would mean a
maximum cable length of 590/77 = 7.6km, remember this is the total cable
resistance, so this figure has to be divided by 2 to give 3.8km max distance.
Allowable total cable resistance for Looppowered IMP
1000
Total Cable resistance
900
800
700
600
500
400
300
200
100
0
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Supply Voltage
Maximum cable resistance vs supply voltage for 2 wire mode.
Important Information
If the equipment is installed or used in a manner not specified in this
manual, then the protection provided by the equipment may be impaired.
Page12
Preparation for Operation
Before switching on, check the following:
The IMP Lite is mounted correctly.
The power supply is correctly installed.
Maintenance
There are no user serviceable parts inside your IMP Lite if you experience
any problems with the unit, then please contact Pulsar Process Measurement
for advice.
To clean the equipment, wipe with a damp cloth. Do not use any solvents on
the enclosure.
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Page14
Chapter 3
How To Use Your
IMP Lite
Operating the Controls
Display
Whilst in the Run Mode, the 4 digit LCD, by default, will display the current
level reading in metres, the display will also alternate between the reading
and “LOE” when a fault condition (Loss Of Echo) is detected. When in the
Program Mode the display is used to read information on the Menu Options
and the values entered.
There are two operating modes for your IMP Lite, Run Mode and Program
Mode.
Run Mode
This mode is used once the IMP Lite has been set up in program mode. It is
also the default mode that the unit reverts to when it resumes operation after
a power failure.
When the IMP Lite is switched on for the first time, it will display, in P104
Measurement Units, the distance from the transducer face to the target.
Page15
Program Mode
This mode is used to set up the IMP Lite or change information already set,
this is achieved by using the 4 push buttons located below the display.
Entering a value for each of the menu options that are relevant to your
application provides all the programming information.
Button Functions
There are 4 push buttons located under the display. Their name and
functions are as follows:
Button
ESC
UP
Run Mode
Displays details of unit
Serial No. and Software
Version
Displays Current
Temperature
DOWN
Displays Current Echo
Strength (dB’s)
ENTER
Displays current mA output
Program Mode
Used to Navigate out of the
Menu System and return to
Run Mode. Also used to
Cancel a Parameter Value
entered in error.
Used for Navigating around
Menu Sytem and Increasing
Menu Option Values.
Used for Navigating around
Menu Sytem and Decreasing
Menu Option Values.
Used to confirm an action such
as entering a Menu Option or
Enter a Parameter Value.
Page16
How to Access Program Mode
To access the Program mode press the “ESC” and “Enter” button
simultaneously, where upon the display will show PASS on the LCD display
briefly, to prompt you to enter the password, the display will now show 0000, and
the left hand digit will flash.
By using the UP and DOWN keys to increment or decrement the digit, and the
ENTER key to shift the flashing digit to the next position. Assuming the passcode
is the default 1997, you should then enter this.
The ESC key can be used to go back to the previous digit. Finally when you have
selected all digits pressing the ENTER key again will input the selected pass code
to the IMP Lite; if successful the display will show APP (Application). If however
you input the wrong pass code the IMP Lite LCD display will show Fail for 2
seconds and will revert back to run mode.
Using The Menu System
The menu system has been designed to make the changing of parameters very
simple. Once in the Program Mode the display will show a line of text that
displays the menu system. Pressing the Up and Down buttons will scrolls the
display between the menu items, (as shown below, starting at APP).
APP
(Application)
Cop
(Compensation)
Uol
(Volume)
StA
(Stability)
DiSP
(Display)
SyS1
(System)
LOOP
(mA Output)
tESt
(Test)
As you press the UP and DOWN buttons to scroll left and right between the
menu options, you can press ENTER at any time to select a specific menu
which will then take you to the parameters within the selected menu.
Page17
Once you have reached the relevant menu, scroll through the parameters,
and enter the necessary information. To enter the information, use the UP
and DOWN keys to increment or decrement the digit, and the ENTER key
to shift the flashing digit to the next position, once you have completed
entering the value required pressing the ENTER button again will save the
value.
When you have finished, press CANCEL to go back to the previous level.
When you have reached the top level, then the IMP Lite will ask for
confirmation before allowing you to go back into run mode. This is done by
pressing ENTER at the display prompt.
Parameter Defaults
Factory Defaults
Factory Defaults
When first installing the IMP Lite, or subsequently moving or using the unit
on a new application, before proceeding to program the unit for its intended
application it is recommended that you ensure that all parameters are at their
default values by completing a Factory Defaults P930, as described in
Chapter 5 Parameter Guide.
When you first switch the IMP Lite on, it will be reading the distance from
the face of the transducer to the material surface. It will be indicating in
P104 Measurement Units, as shown on the display.
TIP
In some applications it is simplest to empty
the vessel, take a reading from the Imp for
distance and then setup the empty level to this
figure.
Once you are satisfied with the installation, and the IMP
IMP Lite is reading what
you would expect in terms of distance from the face of the transducer to the
material level, then you can proceed with programming, for the intended
application. It is sensible to program all of the required parameters at the
same time. The system will be then set-up.
Note that the span is automatically calculated from the empty level, so the
empty level should be entered first.
Page18
Chapter 4
Getting Results With Your
IMP Lite
This chapter explains how to undertake the various functions of your IMP
Lite. Where specific parameters are used, consult Parameter Guide in
Chapter 5.
Setting up Your Application
Empty Distance
Empty Distance (P105) is the distance from the face of the transducer to the
material at the bottom of the vessel.
Span
Span (P106) is the distance from the empty level (0% full) to span (100%
full).
Near and Far Blanking
Near blanking (P107) is the distance from the face of the transducer that the
Imp will not record a level nearer than. A typical reason to increase this from
the default value would be if you wish to ignore close in obstructions.
Far blanking (P108) is the distance (as a percentage of empty level) beyond
the empty level that the Imp will read, the default is plus 20% of empty level.
If you wish to monitor further than the empty level, then increase this figure,
so that the empty level plus the far blanking figure (as % of empty level) is
greater than the surface being measured, within the capability of the
transducer being used.
Using the 44-20 mA Output
The mA output can be used to monitor remotely what the IMP Lite is showing,
so it can be displayed remotely, integrated into a PLC, or used to generate a
record using a chart recorder or similar.
By default, the IMP Lite will provide a 4-20 mA output that represents what is
displayed on the Imp, but these parameters can be overwritten as follows.
By default, the 4-20 mA will represent the empty level (4mA) and 100% of
the operational span (20mA), but you may wish to only represent a section of
the operational span. For example, the application may have an operational
span of 6 metres, but you may only wish to represent empty level to 5 metres.
If so, change P834 (Low Value) to 0, and P835 (High Value) to 5.0.
Page19
If the device connected to the mA output is out of calibration, and cannot be
calibrated, then the low and high current levels can be trimmed by altering
P838 (Low Trim) and P839 (High Trim). To do this, simply enter the value
that ensures that 4 mA or 20 mA respectively are shown on the remote device.
You can use the left/right menu keys to alter the value until the correct
reading is shown on the remote device, rather than typing in a value.
Setting Security Passcodes
A passcode is used to switch the
Mode.
IMP Lite from Run Mode into Program
You can set a new passcode to prevent anyone changing any of your settings
within your IMP Lite. The default passcode is 1997, but this may be changed
as follows.
Additional Information
The passcode is also used for remote access using the RS232, so if this is
being used, be sure to ensure any additional equipment using this feature is
changed accordingly.
Using A Passcode
If you don’t want to use a passcode, you can disable it as follows. First, enter
Program Mode and go to the SyS1 (System) menu. Select P921 which is the
passcode enable parameter.
As shown on the display, setting the passcode enable to ‘0’ will disable it, or
‘1’ will enable the use of passcode.
Additional Information
If the use of a passcode has been disabled, then you can move straight into
Program Mode from Run Mode by pressing the ESC and ENTER button
simultaneously.
Changing The Passcode
You can set the passcode to any number from 0000 to 9999. To do this,
enter Program Mode and go to SyS1 (System) menu. Select P922 which is
the Passcode parameter which can be changed as required.
Page20
Resetting Factory Defaults
If you need to restore parameters to their original factory settings, then enter
Program Mode go to the SyS1 (System) menu and ENTER. Using the UP
and DOWN buttons, go to parameter P930, and ENTER, P930 is the
factory defaults parameter, change the value to 1 and ENTER , all
parameters, with the exception of the mA trims, will be restored to the
factory settings (including the DATEM trace) and on completion Stor
(Store) will be displayed after which you can ESC out of this parameter and
continue programming the IMP Lite for the required application.
Checking the Information Specific to your IMP Lite
There are some parameters dedicated to each individual IMP Lite, such as the
software revision and the units serial number.
Checking the Software Revision and Serial Number
If you need to identify the serial number of the unit or the current level of
software in your IMP Lite, whilst in Run Mode press the ESC button and
the serial number along with the software revision will be displayed.
Alternatively enter Program Mode and select SyS1 (System) menu and
ENTER. Select parameter P926 to view the identity of the current
software revision or P928 for the serial number of the unit.
Using the RS232 Serial Interface
The RS232 serial interface is used to communicate between the IMP Lite,
and a PC using the optinal Pulsar IMP PC software, this software is used to
obtain information from the IMP Lite so that echo traces can be viewed,
parameters can be uploaded, downloaded and saved.
To do so, the settings for communications control are set as follows and
cannot be changed: baud rate 19,200, 8 data bits, no parity, 1 stop bits.
Connection between the IMP Lite and the PC is made via RJ11 connector
located under the lid of the IMP Lite.
Note
When connecting to the RS232 (RJ11) port this will cause the IMP Lite to
draw 20mA, this is necessary to ensure correct operation of the RS232.
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Page22
Chapter 5
Parameter Guide
Parameter Listing
This chapter describes all of the parameters contained within the IMP Lite.
Application (APP) Menu
Menu
P100 Mode of Operation
This parameter sets the mode of operation, when in run mode, and can be set
to one of the following:
Option
1= Distance (Default)
2= Level
3= Space
4= Volume
Description
Display shows the distance from the
transducer face to the surface.
Display shows how full the vessel is.
Display shows how empty a vessel is.
Display shows volume of material in the
vessel
P104 Measurement Units
This parameter sets the units you want to use for programming and display
Option
1 = metres
2 = cm
3 = mm
4 = feet
5 = inches
Description
All units of measure are METRES
All units of measure are CENTIMETRES
All units of measure are MILLIMETRES
All units of measure are FEET
All units of measure are INCHES
P105 Empty Level
This parameter is to be set to the maximum distance from the face of the
transducer to the empty point, in P104 Measurement Units. Note this value
affects span as well, so should be set before span. Default: IMP 3 = 3.00m
(9.84 feet), IMP 6 = 6.00m (19.69 feet) and IMP 10 = 10.00m (32.81 feet).
Page23
P106 Span
This parameter should be set to the maximum distance from the Empty
Level (P105) to the maximum material level. It is automatically set to be
equal to the Empty Level (P105) less the Near Blanking distance (P107),
when you set the empty level. Default IMP 3 = 2.80m (9.19 feet), IMP 6 =
5.70m (18.70 feet) and IMP 10 = 9.70m (31.82 feet).
P107 Near Blanking Distance
This parameter is the distance from the face of the transducer that is not
measurable, and is pre-set to the minimum value dependant on the version
of IMP Lite being used. It should not be set to less than this figure, but can
be increased.
IMP Lite Version
Lite 3 metre
Lite 6 metre
Lite 10 metre
Near Blanking Distance
Default Blanking Distance = 0.2m (0.66 feet)
Default Blanking Distance = 0.3m (0.98 feet)
Default Blanking Distance = 0.3m (0.98 feet)
P108 Far Blanking Distance
This is the distance (as a percentage of empty level) beyond the empty
point that the unit will be able to measure, and the default is pre-set to 10%
of the empty level.
If the surface being monitored can extend beyond the Empty Level (P105)
then the far blanking distance can be increased to a maximum of 100% of
empty level.
This parameter is always entered as a % of empty level.
Page24
Volume (UoL) Menu
P600 Vessel Shape
This parameter determines which vessel shape is used when utilising
“Volume Conversion”.
The choices are as shown in the table below, along with the dimensions that
are required to be entered (P601-P603).
Vessel Shape
P600 Value
P600=0 Cylindrical
Flat base (Default)
Dimensions
Required
Cylinder diameter
P600=1=Rectangular
Flat base
Width and Breadth
P600=2 Cylindrical
Cone base
Cylinder diameter
and height of
bottom
P600=3 Rectangular
Pyramid base
Width and Breadth
of rectangular
section and height
of bottom
P600=4 Cylindrical
Parabola base
Cylinder diameter
and height of
bottom
P600=5 Cylindrical
Half-sphere base
Cylinder Diameter
Page25
Vessel Shape
P600 Value
P600=6 Cylindrical
Flat sloped base
Dimensions
Required
Cylinder diameter
and height of
bottom
P600=7 Rectangular
Flat sloped base
Width and Breadth
of rectangular
section and height
of bottom
P600=8 Horizontal
cylinder with flat ends
Cylinder diameter
and tank length
P600=9 Horizontal
cylinder with
parabolic ends
Cylinder diameter,
length of one end
section, and tank
length
Sphere diameter
P600=10 Sphere
P600=11 Universal
Linear
P600=12 Universal
Curved
No dimensions
required, level and
volume breakpoints
used.
Entered via IMP
PC
No dimensions
required, level and
volume breakpoints
used.
Entered via IMP
PC
Page26
P601-P603 Vessel Dimensions
These three parameters are used to enter the dimension required to calculate
the volume. The dimensions required are as shown below.
Vessel Shape
P600=0
Cylindrical Flat base
P600=1
Rectangular Flat base
P601
Cylinder
Diameter
P602
P600=2
Cylindrical Cone base
Height of
base
Cylinder
Diameter
P600=3
Rectangular Pyramid base
P600=4
Cylindrical Parabola base
Height of
base
Height of
base
Width of
rectangle
Cylinder
Diameter
P600=5
Cylindrical Half-sphere base
P600=6
Cylindrical Flat sloped base
P600=7
Rectangular Flat sloped base
P600=8
Horizontal cylinder with flat
ends
Cylinder
Diameter
Height of
base
Height of
base
Length of
Cylinder
Cylinder
Diameter
Width of
rectangle
Cylinder
Diameter
P600=9
Horizontal cylinder with
parabolic ends
Length of
Cylinder
Cylinder
Diameter
P600=10
Sphere
Sphere
Diameter
Width of
rectangle
P603
Breadth of
rectangle
Breadth of
rectangle
Breadth of
rectangle
Length of
one end
section
P604 Calculated Volume
This parameter displays the maximum volume that has been calculated by
the IMP Lite and is a Read Only parameter. The volume displayed will be
shown in cubic meters and is the total volume available between empty
level (P105) and 100% of span (P106).
Page27
P605 Volume Units
This parameter determines the units that will be used in calculating volume
conversion. It is used in conjunction with P607 (maximum volume), please
note that there is no provision for the volume units descriptor to be shown
on the display.
The choices are:
Option
0 = No Units
1 = Tons
2 = Tonnes
3 = Cubic metres
4 = Litres
5 = UK Gallons
6 = US Gallons
7 = Cubic feet
8 = Barrels
Description
Volume will be totalised with no units
Volume will be totalised in Tons
Volume will be totalised in Tonnes
Volume will be totalised in cubic metres
Volume will be totalised in litres
Volume will be totalised in UK Gallons
Volume will be totalised in US Gallons
Volume will be totalised in cubic feet
Volume will be totalised in barrels
P606 Correction Factor
This parameter is used to enter a correction factor, when required, such as
the specific gravity of the material so that the volume calculated is relative
to the actual amount of material that can be contained between empty level
(P105) and 100% of span (P106). Default = 1
P607 Max Volume
This parameter displays the actual maximum volume that has been
calculated by the IMP Lite, i.e. P604 Calculated Volume x P606
Correction Factor, and is a Read Only parameter. The volume displayed
will be shown in P605 Volume Units and is the total volume available
between empty level (P105) and 100% of span (P106).
Page28
Display (DiSP) Menu
P800 Display Units
This parameter determines whether the reading displayed is in
Measurement Units (P104), or as a percentage of span.
Option
1 = Measured (Default)
2 = Percentage
Description
Display is in Measurement Units (P104)
Display is in percentage of span.
P801 Decimal Places
This parameter determines the number of decimal places on the reading
during run mode.
Minimum = 0 (No decimal places), Maximum 3 = (3 decimal Places)
Default = 2
P808 Fail-safe Mode
By default, if a fail-safe condition occurs, then the display, relays and the
mA output are held at their last known values until a valid reading is
obtained.
If required, then you can change this so that the unit goes to high (100% of
span), or low (empty) as follows:
Option
1 = Known (Default)
2 = High
3= Low
Description
Remain at the last known value
Will fail to the high value (100% of Span).
Will fail to the low value (empty)
P840 mA Output Fail-safe
P809 Fail-safe Time
In the event of a fail-safe condition occurring the fail safe timer determines
the time before fail-safe mode is activated. Default = 2.00 mins
If the timer activates, the unit goes into fail-safe, as determined by P808,
(Display and P840 (mA Output). When this happens, you will see the
message “LOE!” on the display.
When a valid measurement is obtained then the display, relays and mA
output will be restored and the timer is reset.
Page29
mA Output (LOOP)
(LOOP) Menu
P834 mA Low Level
This parameter sets, in Measurement Units (P104), the value of ‘level’,
‘distance’ or ‘space’, depending on the selected Mode of Operation (P100),
at which 4mA will occur.
P835 mA High Level
This parameter sets, in Measurement Units (P104), the value of ‘level’,
‘distance’ or ‘space’, depending on the selected Mode of Operation
(P100), at which 20 mA output will occur.
P838 mA Low Trim
If the device you are connected to is not calibrated, and not showing the low
value, then you can trim it using this parameter. You can either type in the
offset directly, or use the arrow keys to move the output up and down until
you get the expected result on the device that is connected.
P839 mA High Trim
If the device you are connected to is not calibrated, and not showing the
high value, then you can trim it using this parameter. You can either type in
the offset directly, or use the arrow keys to move the output up and down
until you get the expected result on the device that is connected.
P840 mA Fail-safe Mode
This parameter determines what happens to the mA output in the event of
the unit going into fail-safe mode. The default is to do the same as the
system fail-safe (P808), but this can be overridden to force the mA output
to an independent fail-safe mode as follows:
Option
0 = Default
1 = Hold
2 = Low
3 = High
Description
mA output will fail as per P808.
mA output will retain its last known value.
mA output will fail to its low condition. 3.5mA
mA output will fail to its high condition. 22mA
Page30
Compensation (CoP)
CoP) Menu
P851 Measurement Offset
The value of this parameter is added to the measured distance, in
Measurement Units (P104).
This Offset will be added to the level, as derieved from the transducer, and
will affect everything including the reading on the display, the relay
setpoints and the mA output.
P852 Temperature Source
Default = 1
This parameter determines the source of the temperature measurement. By
default it is set to internal (transducer) (P852=1), which will automatically
detect the temperature from the transducer. If for any reason, no temperature
input is received, then the Fixed Temp value is used, as set by P854.
The temperature source can be specifically set as follows:
Option
1 = Internal (Default)
3 = Fixed
Description
Always uses temperature reading from
transducer.
Always uses fixed temperature (P854)
P854 Fixed Temperature
This parameter sets the temperature, in degrees centigrade to be used if
P852 (Temperature Source) =3. Default = 20oC
Page31
P860 Sound Velocity
This option allows for the velocity of sound to be changed according to the
atmosphere the transducer is operating in. By default the velocity is set for
342.72m/sec which is the speed of sound travelling in air at a temperature of
20oC.
The table below gives details of the velocity of sound in various gaseous
atmospheres In all cases the velocity indicated is that in a 100% gaseous
atmosphere at 0oC. In atmospheres less than 100% it may be necessary to
check the level indicated at near empty and near full and compare with the
actual level, several times, then adjust the Sound Velocity accordingly to
obtain an accurately displayed reading.
Gas
Chlorine
Argon
Oxygen
Air
Ammonia
Methane
Helium
Neon
Sound Velocity
206 m/sec
308 m/sec
316 m/sec
331.5 m/sec
415 m/sec
430 m/sec
435 m/sec
965 m/sec
P645 Vapour Temperature Compensation
The sound velocity in air increases or decreases at a uniform rate of
60cm/sec. per oC, however in atmospheres other than air it will change at a
different rate.
This option allows the rate of change in cm/sec. per oC to be set according to
the atmosphere and temperature present. The level indicated, should be
compared with the actual level, several times, then Vapour Temperature
Compensation adjusted accordingly, to obtain an accurately displayed
reading. Default = 60 cm/sec. per oC
Page32
Stability (StA) Menu
Damping
Damping is used to damp the display, to enable it to keep up with the
process but ignore minor surface fluctuations.
P870 Fill Damping
This parameter determines the maximum rate at which the unit will respond
to an increase in level. It should be set slightly higher than the maximum
vessel fill rate. Default = 10.000 metres/minute (32.81 feet/minute)
P871 Empty Damping
This parameter determines the maximum rate at which the unit will respond
to a decrease in level. It should be set slightly higher than the maximum
vessel empty rate. Default = 10.000 metres/minute (32.81 feet/minute)
System (SyS1
(SyS1) Menu
The following three parameters do not affect how the unit performs, but details,
contained in them, may be required, by Pulsar, when making technical
enquiries.
P921 Enable Code
Enables the passcode (P922), which means the passcode must be entered
to go into program mode. If disabled (set to 0), then no passcode is
required, and pressing ESC and ENTER button simultaneously will allow
entry into the program mode.
P922 Passcode
This is the passcode that must be used to enter program mode. The default
is 1997, but this can be changed to another value.
P926 Software Revision
This parameter will display the current software revision.
P928 Serial Number
This parameter will display the serial number of the unit.
Page33
P930 Factory Defaults
This parameter resets all parameter values to the original Factory Set values
that were installed when the unit was tested, before despatch to you.
To reset parameters, enter 1 and press ENTER,
ENTER all parameters, with the
exception of the mA trims, will be restored to the factory settings (including
the DATEM trace) and on completion Stor (Store) will be displayed after
which you can ESC out of this parameter and continue programming the
IMP Lite for the required application.
Test (tESt) Menu
P991 Hard Test
When this parameter is selected, the unit will test the following in turn.
• Display. All the segments on the LCD and the backlight are lit up,
so you can see if they all work. Press the ENTER button, to end the
test.
• Keys. You should press each button, to confirm it works, with a
counter showing how many more buttons you have to press. Press
ESC last, as this will show if all keys were pressed or not. If they
were not, then an error message is displayed.
P992 mA Out Test
This parameter will allow you to force a specified current on the mA output,
to test the equipment that it is connected to, and to make sure the unit is
working correctly. The figure you enter will be generated by the mA output.
Page34
Chapter 6
Troubleshooting
This section describes many common symptoms, with suggestions as to
what to do.
Symptom
Display blank, transducer not
firing.
Display shows “L0E”.
Incorrect
reading
being
displayed for current level.
Material level is consistently
incorrect by the same amount.
What to Do
Check power supply
No valid echo being received and unit
has gone into fault condition. Check
material level is not out of range,
sensor is perpendicular to material
surface.
Measure actual distance from
transducer face to surface of material.
Enter Program Mode and access SyS1
menu, go to P21and press ENTER
type in the measured distance, press
ENTER, wait until “Stor” is
displayed and return to Run Mode,
display should now update to correct
reading.
Check empty level (P105) correctly
entered.
Page35
Parameter Record
APPLICATION (APP) MENU
No.
P100
P104
P105
P106
P107
P108
Parameter Details
Description
Mode
Measurement Units
Empty Level
Span
Near Blanking
Far Blanking
Default
1 = Dist.
Entered Values
1
2
3
4
5
Entered Values
1
2
3
4
5
Entered Values
1
2
3
4
5
Model Dependant
Model Dependant
Model Dependant
Model Dependant
10.0%
VOLUME (UoL) MENU
No.
P600
P601
P602
P603
P604
P605
P606
P607
Parameter Details
Description
Vessel Shape
Vessel Dimension 1
Vessel Dimension 2
Vessel Dimension 3
Calculated Volume
Volume Units
Correction Factor
Max Volume
Default
0
0.00
0.00
0.00
Read Only
Model Dependant
1
Read Only
DISPLAY (DisP) MENU
No.
P800
P801
P808
P809
Parameter Details
Description
Display Units
Decimal Places
Fail Mode
Fail Time
Default
1 = measured
2
1 = Known
2.0 mins
Page36
mA OUTPUT (LOOP) MENU
No.
P834
P835
P838
P839
P840
Parameter Details
Description
Low Level
High Level
Low Trim
High Trim
Fail Mode
Default
0.000
Entered Values
1
2
3
4
5
Entered Values
1
2
3
4
5
Entered Values
1
2
3
4
5
Entered Values
1
2
3
4
5
Model Dependant
0.00 mA
0.00 mA
0 = Default
COMPENSATION (CoP) MENU
No.
P851
P852
P854
P860
P645
Parameter Details
Description
Measurement Offset
Temperature Source
Fixed Temperature
Sound Velocity
Vapour Temp. Comp.
Default
0.000
1 = Automatic
20.00 Deg. C
342.72 m/sec
60cm/sec per oC
STABILITY (StA) Menu
No.
P870
P871
Parameter Details
Description
Fill Damping
Empty Damping
Default
Model Dependant
Model Dependant
SYSTEM (SyS1) MENU
No.
P921
P922
P926
P928
Parameter Details
Description
Enable Code
Passcode
Software Revision
Serial Number
Default
1 = Yes
1997
Read Only
Read Only
Page37