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IMP+
Instruction Manual
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2
IMP + (FIFTH EDITION REV 3)
January 2022
Part Number M-080-0-005-3P
COPYRIGHT
© Pulsar Measurement, 2005-22. 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 Measurement neither 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 Measurement
cannot be held liable for any errors.
Pulsar Measurement operates a policy of constant development and improvement and reserves
the right to amend technical details, as necessary.
The IMP+ shown on the cover of this manual is used for illustrative purposes only and may not
be representative of the actual IMP+ supplied.
CONTACT
For technical support, please contact:
Europe: supporteurope@pulsarmeasurement.com
Outside Europe: supportnorthamerica@pulsarmeasurement.com
If you have any comments or suggestions about this product, please contact:
Europe: europe@pulsarmeasurement.com
Outside Europe: northamerica@pulsarmeasurement.com
Pulsar Measurement website: www.pulsarmeasurement.com
United States
11451 Belcher Road South
Largo,
FL 33773
888-473-9546
Canada
16456 Sixsmith Drive
Long Sault, Ont.
K0C 1P0
855-300-9151
United Kingdom
Cardinal Building, Enigma
Commercial Centre
Sandy’s Road, Malvern
WR14 1JJ
00 44 (0)1684 891371
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CONTENTS
Chapter 1: Start Here… ........................................................................................................... 5
About this Manual ............................................................................................................... 5
About the IMP+ .................................................................................................................... 6
Product Specification .......................................................................................................... 7
EU Declaration of Conformity ......................................................................................... 9
Chapter 2 Installation ........................................................................................................... 10
Unpacking ............................................................................................................................ 10
Power Supply Requirements......................................................................................... 10
Dimensions .......................................................................................................................... 11
Cable Entry ........................................................................................................................... 14
Terminal Connections ...................................................................................................... 15
Preparation for Operation ............................................................................................. 17
Maintenance ....................................................................................................................... 17
Chapter 3 How To Use Your IMP+ ................................................................................. 18
Operating the Controls ................................................................................................... 18
Using the Menu System ................................................................................................. 20
Parameter Defaults ........................................................................................................... 21
Chapter 4 Getting Results From Your IMP Lite .......................................................... 22
Setting up Your Application.......................................................................................... 22
Using the 4-20 mA Output ............................................................................................ 22
Using the Relays ................................................................................................................ 23
Alarm Relay Set-up ........................................................................................................... 24
Control Relay Set-up ........................................................................................................ 25
Loss of Echo Set-up .......................................................................................................... 26
Setting Security Passcodes ............................................................................................ 26
Resetting Factory Defaults............................................................................................. 27
Checking the Information Specific to your IMP+ ................................................. 27
Using the RS232 Serial Interface ................................................................................. 28
Chapter 5 Parameter Listing and Descriptions .......................................................... 29
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Parameter Listing .............................................................................................................. 29
Application (APP) Menu ................................................................................................. 29
Relay (rL) Menu .................................................................................................................. 31
Volume (UoL) Menu ......................................................................................................... 34
Display (DiSP) Menu......................................................................................................... 39
mA Output (LOOP) Menu .............................................................................................. 40
Compensation (CoP) Menu ........................................................................................... 41
P860 Sound Velocity ........................................................................................................ 42
Stability (StA) Menu ......................................................................................................... 43
System (SyS1) Menu ........................................................................................................ 43
Test (tESt) Menu ................................................................................................................ 44
Chapter 6 Troubleshooting ................................................................................................ 45
Chapter 7 Disposal ................................................................................................................ 46
Transducers ......................................................................................................................... 46
Controllers............................................................................................................................ 46
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CHAPTER 1: START HERE…
Congratulations on your purchase of a Pulsar IMP+ 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: Look f o r this icon t h r oughout y o u r Pulsar M e a s u r e ment manual to
find help f u l informatio n a n d answer s t o f requentl y a s ked questi o n s .
Additional Information
Additional Information
At various parts of the manual, you will find sections
like this that explain specific things in more detail.
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About the IMP+
Functional Description
The IMP+ 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. Its unique design
allows for both 3 wire and 2 wire (loop powered) configuration all within the
same unit.
Easy calibration and maintenance free “fit and forget” performance mean
that you can install the IMP+ Level Monitoring System rapidly and with
confidence. Two relays which can be configured for either alarm or control
functions, with fully programmable setpoints are provided when connected
as a 3-wire device, together with fault condition being indicated by the mA
output on both the 2 and 3 wire mode.
The IMP+ 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. The IMP+ comes in three models: IMP 3 with a
range from 0.20m (0.66 feet) to 3.00m (9.84 feet), IMP 6 with a range of 0.3m
(0.98 feet) to 6.00m (19.69 feet) and IMP 10 with a range of 0.3m (0.98 feet)
to 10.00m (32.81 feet).
The IMP+ can show level, space, distance, on the display. The relays can be
programmed to give an ‘ON’ and ‘OFF’ point for external control. There is a
4-20 mA output (non-isolated in 3 wire mode) 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+ 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.
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Product Specification
PHYSICAL
Dimensions
O/A height186mm x O/A diameter 133mm (5.24” x
7.32”)
Mounting
1.5” BSP/NPT (IMP3 and 6 models) 2” BSP/NPT
(IMP10)
Weight
Nominal 1 kg
Cable entry detail
2 off cable glands 4.5 – 10mm. (torque to 2NM)
ENVIRONMENTAL
IP Rating (Wall)
IP67
Max. & min. temperature
(Ambient)
-40ºC to +65ºC (-4ºF to 149ºF)
Max. & min. temperature
(Transducer)
-40ºC to +80ºC (-4ºF to 176ºF)
CE Approval
See EU Declaration of Conformity
PERFORMANCE
Beam angle (-3dB half power)
<10° inclusive
Operating frequency
IMP 3 125kHz, IMP 6 75kHz, IMP 10 41kHz
Range
IMP 3 0.2 – 3m (0.66 – 10ft)
IMP 6 0.3 – 6m (0.98 – 20ft)
IMP 10 0.3 – 10m (0.98 – 33ft)
Accuracy
± 0.25% or 6mm (0.24 inches) whichever is greater
Resolution
± 0.1% or 2mm (0.08inches) whichever is greater
4-20mA output
Resolution 5µA
Temperature compensation
Via internal temperature sensor (± 0.5°C accuracy)
Response time
Power up to stable reading = 10 seconds
2-wire configuration (isolated)
Passive 4-20mA output
Current output
3.5-22mA
3-wire configuration (nonisolated)
0-10V analogue output.
Active and passive 4-20mA outputs.
Backlit LCD display
Power consumption with relays
energised
<60mA (less 12mA/relay not energised)
PROGRAMMING
PC Programming
Via RJ11 port to RS232 using IMP PC software
On-board programming
Via 4 button keypad and a 4-digit LCD display
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SUPPLY
Power supply
11 - 30V DC
Pulsar Measurement operates a policy of constant development and
improvement and reserve the right to amend technical details, as necessary.
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EU Declaration of Conformity
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CHAPTER 2 INSTALLATION
Unpacking
Power Supply Requirements
The IMP+ operates from a DC supply of 11 –30V and will typically draw less
than 0.06A.
The compact one-piece construction of the IMP+ 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.
Important Notice
All shipping cartons should be opened carefully. When using a box
cutter, do not plunge the blade deeply into the box, as it could potentially
cut or scratch equipment components. Carefully remove equipment from
each carton, checking it against the packing list before discarding any
packing material. If there is any shortage or obvious shipping damage to
the equipment, report it immediately to Pulsar Measurement.
Important Notice
All electronic products are susceptible to electrostatic shock, so follow proper
grounding procedures during installation.
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Dimensions
The dimensions of the IMP+ are shown below:
1” BSP/NPT – IMP+ 3 & 6
2” BSP/NPT – IMP+ 10
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Outdoor and Open Vessel Installation
The IMP+ 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+ is not installed in direct
sunlight, 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.
“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+ 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+ and the connection to the vessel.
IMP MODEL
RANGE
L = BLANKING
Lite 3
3 metres
(9.84 feet)
200mm
(0.66 feet)
Lite 6
6 metres
(19.69 feet)
300mm
(0.98 feet)
Lite 10
10 metres
(32.18 feet)
300mm
(0.98 feet)
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Standpipe installations
When mounting the IMP+ 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:
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. to avoid unwanted signal returns.
If using standpipes which extend into 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.
DIA. (D)
L = BLANKING
mm
inches
mm
inches
80 3 220
8
100 4 300
12
150 6 420
16
200 8 560
22
Important Notice
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.
The maximum level
(100% of Span), is
inside the blanking
distance
Pipe should be
free of
obstructions such
as weld seams
Correct standpipe
installation
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Cable Entry
The IMP Lite+ has two M16 cable entries, fitted with a suitable gland, to
ensure moisture protection is maintained.
Terminal Connection Details
The IMP+’s unique design allows for both 3 wire and 2 wire (loop powered)
configuration within the same unit the terminal connections for both
configurations are as detailed below. Wiring details are also given on the
terminals under the access cover.
2 Wire (Loop Powered)
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3 Wire
Source mode - the power for the loop is supplied by the IMP+.
Terminal Connections
2 Wire
Terminal 1 + ve: Direct Current (DC) input (11-30VDC)
Terminal 2 - ve: Current Output (4-20mA)
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Loop Resistance
For two wire operation, the maximum cable resistance allowable can be
calculated from the graph below. For example, if an IMP+ were supplied
from 24v connected as a 2-wire unit (4-20mA only), 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 total cable
resistance, so this figure has to be divided by 2 to give 3.8km max distance.
Maximum cable resistance vs supply voltage for 2 wire mode.
Maximum cable resistance vs supply voltage for 3 wire mode.
Allowable total cable resistance for Loop-
powered IMP
0
100
200
300
400
500
600
700
800
900
1000
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Supply Voltage
Total Cable resistance
4-20mA Sourcing Total load resistance allowable
@ 22mA output
0
200
400
600
800
1000
1200
7 8 9 101112 1314 1516 1718 1920 21 22 23 24 25 26 27 28 29 30
4-20mA supply Voltage
Maximum load resistance
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3 Wire
Terminal 1: + ve Current Output (4 – 20mA SINK MODE)
(NOT USED IN SOURCE MODE)
Terminal 2: - ve ground (4-20mA SINK MODE)
Terminal 3: - ve: Direct Current (DC) input (11-30VDC)
Terminal 4: + ve: Direct Current (DC) input (11-30VDC)
Terminal 5: + ve Current Output (4 – 20mA SOURCE MODE)
Terminal 6: + ve: 0-10V output (P842 = 1) or 0-5V output (P842 = 0)
Terminal 7: - ve: 0-10V output (P842 = 1) or 0-5V output (P842 = 0)
Terminal 8: Relay 1 Normally Open (N/C) Contact (De-energised)
Terminal 9: Relay 1 Common
Terminal 10: Relay 1 Normally Closed (N/O) Contact (De-energised)
Terminal 11: Relay 2 Normally Open (N/C) Contact (De-energised)
Terminal 12: Relay 2 Common
Terminal 13: Relay 2 Normally Closed (N/O) Contact (De-energised)
Preparation for Operation
Before switching on, check the following:
• The IMP+ 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.
Important Notice
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.
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CHAPTER 3 HOW TO USE YOUR IMP+
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+ 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+ is switched on for the first time, it will
display, in P104 Measurement Units, the distance from the transducer face
to the target.
Program Mode
This mode is used to set up the IMP+ 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.
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Button Functions
There are 4 push buttons located under the display. Their name and
functions are as follows:
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 to run mode.
BUTTON
RUN MODE
PROGRAM MODE
ESC
Displays details of unit
Serial No. and Software
Version
Used to Navigate out of the
Menu System and return to
Run Mode. Also used to Cancel
a Parameter Value entered in
error.
UP
Displays Current
Temperature
Used for Navigating around
Menu System and Increasing
Menu Option Values.
DOWN
Displays Current Echo
Strength (dB’s)
Used for Navigating around
Menu System and Decreasing
Menu Option Values.
ENTER
Displays current mA output
Used to confirm an action such
as entering a Menu Option or
Enter a Parameter Value.
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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 scroll
the display between the menu items, (as shown below, starting at APP).
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.
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+ will ask for
confirmation before allowing you to go back into run mode. This is done by
pressing ENTER at the display prompt.
APP
(Application)
rL
(Relays)
UoL
(Volume)
DiSP
(Display)
LOOP
(mA Output)
Cop
(Compensation)
SyS1
(System)
tESt
(Test)
StA
(Stability)
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Parameter Defaults
Factory Defaults
When you first switch the IMP+ 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
Once you are satisfied with the installation, and the IMP+ 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 the required parameters at the same
time. The system will be then set-up.
Note The span is automatically calculated from the empty level, so the empty
level should be entered first.
Important Notice
When first installing the IMP+, 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.
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.
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CHAPTER 4 GETTING RESULTS FROM YOUR IMP LITE
This chapter explains how to use the various functions of your IMP+. 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 4-20 mA Output
The mA output can be used to monitor remotely what the IMP+ 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+ will provide a 4-20 mA output that represents what is
displayed on the Imp, but these parameters can be overwritten as follows.
For example, when P100 = 2 (Level), 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.
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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.
Using the Relays
All relay related parameters are prefixed with a 2**.
The second digit of the three-figure parameter number denotes the relay
number as follows:
2 1* parameters for Relay 1
22* parameters for Relay 2
The third digit selects specific parameters for the setting up of the relays,
which can be selected individually and results in the following parameter
numbers for each relay.
Relay 1 210 to 218
Relay 2 220 to 228
Each relay can be configured in any of the options shown below, and usually
has two associated set-point values with it (e.g., level) for ON and OFF.
You first need to decide which relays are to be used as alarms. The first
parameter for each relay determines the type of the relay will be (i.e. not in
use, alarm or control.), and what the further relay parameters, applicable to
your selection, represent. Each of these types will now be described.
There are three types that each relay, individually, can be set to, for example,
consider Relay 1, you can select parameter P210 from the following options:
0 = Not in Use relay will remain in the de-energised condition.
1=Alarm: relay will de-energise to set the alarm “ON”.
2=Control relay will energise to set the control “ON”.
Important Notice
When relays are programmed to act as Level Alarms relay setpoints are
set in relation to the level of the material in the vessel, irrespective of the
setting of the mode of operation (P100).
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IMP+ INSTRUCTION MANUAL
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Alarm Relay Set-up
The alarm relays are de-energised to turn the alarms “ON” and energised to
turn the alarms “OFF”. In this way, loss of power will ensure that the alarm is
activated.
To set an alarm relay, set the first parameter for the relay to equal 1. For
example:
Setting Relay 1 for alarm purposes P210 = 1
Setting Relay 2 for alarm purposes P220 = 1
The second parameter for each relay determines the function of the alarm
relay, using the example of Relay 1, the alarm function can be selected
from the options available in parameter P211.
For full details of all available alarm options please refer to P211, 221 Relay
Function… If P210, 220 = 1(Alarm) tables in Chapter 5.
The third parameter, and the fourth parameter for each relay set the
Alarm “ON” and “OFF” points. For a high alarm then set “ON” higher than
“OFF”. For low alarm then set “ON” lower than “OFF”. Using the example
of Relay 1 P213 and P214 set the “ON” and “OFF” points.
For example, using Relay 1:
HIGH ALARM
LOW ALARM
P213 “ON” Setpoint
P213 “ON” Setpoint
Higher than
Lower than
P214 “OFF” Setpoint
P214 “OFF” Setpoint
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Control Relay Set-up
The control relays are energised to turn the control “ON” (start process
function), and de-energised to turn the control “OFF” (stop process
function). In this way, loss of power will ensure that the pumps are turned
“OFF”.
To set a control relay, set the first parameter for the relay to equal 2. For
example:
Setting Relay 1 for control purposes P210 = 2
Setting Relay 2 for control purposes P220 = 2
The second parameter for each relay determines the function of the
control relay, using the example of Relay 1, the control function can be
selected from the options available in parameter P211.
For full details of all available alarm options please refer to P211, 221 Relay
Function… If P210, 220 = 2(control) tables in Chapter 5.
The third parameter and fourth parameter are set to determine the switch
points for the control relay. The control functions are started and stopped
at the “ON” and “OFF” setpoints. To set a control down function (reduce
level) then set “ON” higher than “OFF”. To set a control up function
(increase level) then set “ON” lower than “OFF”.
For example, using Relay 1
HIGH ALARM
LOW ALARM
P213 “ON” Setpoint
P213 “ON” Setpoint
Higher than
Lower than
P214 “OFF” Setpoint
P214 “OFF” Setpoint
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Loss of Echo Set-up
When a relay is assigned to Loss of Echo (LOE) or fault condition, it will be
set as an alarm relay which will be de-energised to turn the alarm (LOE)
“ON” and energise to turn the alarm (LOE) “OFF”. In this way, loss of power
will ensure that the alarm is activated.
To set a LOE alarm relay, set the first parameter for the relay to equal 1
and set the second parameter to 4
Example: Setting Relay 1 for LOE Alarm purposes, set P210 to 1 and then
set P211 to 4.
When a relay is assigned to LOE no further parameters are required.
Setting Security Passcodes
A passcode is used to switch the IMP+ from Run Mode into Program
Mode.
You can set a new passcode to prevent anyone changing any of your
settings within your IMP+. The default passcode is 1997, but this may be
changed as follows.
Using A Passcode
If you do not 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.
Important Notice
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.
Important Notice
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.
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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.
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+
There are some parameters dedicated to each individual IMP+, such as the
software revision and the unit’s 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+, 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.
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Using the RS232 Serial Interface
The RS232 serial interface is used to communicate between the IMP+, and a
PC using the optional Pulsar IMP PC software, this software is used to obtain
information from the IMP+ 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+ and the PC is made via RJ11 connector
located under the lid of the IMP+.
Important Notice
When connecting to the RS232 (RJ11) port this will cause the IMP+ to
draw 20mA, this is necessary to ensure correct operation of the RS232.
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CHAPTER 5 PARAMETER LISTING AND DESCRIPTIONS
Parameter Listing
This chapter describes all the parameters contained within the IMP+.
Application (APP) 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
DESCRIPTION
1 = Distance (Default)
Display shows the distance from the transducer face
to the surface.
2 = Level
Display shows how full the vessel is
3 = Space
Display shows how empty a vessel is
4 = Volume
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
DESCRIPTION
1 = metres (Default)
All units of measure are in METRES
2 = cm
All units of measure are CENTIMETRES
3 = mm
All units of measure are in MILLIMETRES
4 = feet
All units of measure are in FEET
5 = inches
All units of measure are in INCHES
P105 Empty Distance
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).
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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+ being used. It should not be set to less than this figure but can be
increased.
OPTION
DESCRIPTION
Lite 3 metre
Default Blanking Distance = 0.2m (0.66 feet)
Lite 6 metre
Default Blanking Distance = 0.3m (0.98 feet)
Lite 10 metre
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.
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Relay (rL) Menu
P210 (Relay 1), P220 (Relay 2) – Relay Type
This parameter defines what type each relay should be, see the table below
for available options.
OPTION
DESCRIPTION
0 = Not in Use (Default)
Relay not programmed
1 = Alarm
Relay is programmed as an alarm relay, which will
de-energise ON, and energise OFF. This will
ensure an alarm is raised if the power fails to the
unit.
2 = Control
Relay is programmed as a control relay, which will
energise ON, and de-energise OFF.
Alarms
P210 (Relay 1), P20 (Relay 2) = 1 (Alarm)
P211 (RL1), P221 (RL2) – Relay Function
OPTION
DESCRIPTION
0 = Off (Default)
Relay will not operate
1 = Level
Alarm is based on the level in the vessel, and the
type of level alarm (P212, 222) and two setpoints
must be set (P213, 223 & P214, 224). Setpoints are
entered in Display Units or % of span as
referenced to Empty Level *.
4 = Loss of Echo
Alarm is raised if the Failsafe Timer (P809)
expires. No setpoints are required
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P213 (Relay 1), P223 (Relay 2) - Relay “ON” Setpoint
This parameter determines the “ON” point for the alarm and should be set
as follows, in Measurement Units P104
P214 (Relay 1), P224 (Relay 2) - Relay “OFF” Setpoint
This parameter determines the “OFF” point for the alarm and should be set
as follows, in Measurement Units P104
LOE (Loss Of Echo))
No setpoints are required when relays are used as LOE (Loss Of Echo)
Control
P210 (Relay 1), P220 (Relay 2) =2 (Control)
P211 (Relay 1), P221 (Relay 2) - Relay Function
This parameter defines whether the general control relay function is
currently “ON” or “OFF”.
OPTION
DESCRIPTION
0 = Off (Default)
Relay will not operate
1 = On
Control is based on the level in the vessel. All
general controls are used to assist each other (run
at the same time) and each general control has its
own “ON” and “OFF” setpoints.
HIGH ALARM
LOW ALARM
P213/P223 “ON” Setpoint
P213/P223 “ON” Setpoint
Higher than
Lower than
P214/P214 “OFF” Setpoint
P214/P224 “OFF” Setpoint
HIGH ALARM
LOW ALARM
P214/P224 “OFF” Setpoint
P213/P223 “OFF” Setpoint
Lower than
Higher than
P214 “OFF” Setpoint
P214 “OFF” Setpoint
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P213 (Relay 1), P223 (Relay 2) - Relay “ON” Setpoint
This parameter determines the “ON” point for the control relay and should
be set as follows, in Measurement Units P104
P214 (Relay 1), P224 (Relay 2) - Relay “OFF” Setpoint
This parameter determines the “OFF” point for the control relay and should
be set as follows, in Measurement Units P104
CONTROL DOWN
CONTROL UP
P213/P223 “ON” Setpoint
P213/P223 “ON” Setpoint
Higher than
Lower than
P214/P214 “OFF” Setpoint
P214/P224 “OFF” Setpoint
CONTROL DOWN
CONTROL UP
P214/P224 “OFF” Setpoint
P213/P223 “OFF” Setpoint
Lower than
Higher than
P214 “OFF” Setpoint
P214 “OFF” Setpoint
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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 DESCRIPTION
DIMENSIONS
P600 = 0 (Default)
Cylindrical Flat Base
Cylinder diameter
P600 = 1 Rectangular Flat
Base
Width and Breadth
P600 = 2 Cylindrical Cone
Base
Cylinder diameter
and height of
bottom
P600 = 3 Rectangular Flat
Base
Width and Breadth
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VESSEL SHAPE
P600 VALUE DESCRIPTION
DIMENSIONS
P600 = 4 Parabola Base
Cylinder diameter
and height of
bottom
P600 = 5 Flat Sloped Base
Cylinder diameter
P600 = 6 Flat Sloped Base
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
and section, and
tank length
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VESSEL SHAPE
P600 VALUE
DESCRIPTION
DIMENSIONS
P600 = 10 Sphere
Sphere diameter
*P600 = 11 Universal linear
No dimensions
required as level,
and volume
breakpoints are
used
*P600 =12 Universal curved
No dimensions
required as level,
and volume
breakpoints are
used
*P600 = 11 or 12 can be programmed by IMP PC only. For further assistance
please contact your local Pulsar distributor.
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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 and are
entered Measurements Units (P104).
VESSEL SHAPE
P601
P602
P603
P600 = 0
Cylindrical flat base
Cylinder
Diameter
Not required
Not required
P600 = 1
Rectangular flat base
Not required
Width of
rectangle
Breadth of
rectangle
P600 = 2
Cylindrical cone base
Height of
base
Width of
rectangle
Not required
P600 =3
Rectangular pyramid base
Height of
base
Width of
rectangle
Breadth of
rectangle
P600 = 4
Cylindrical parabola base
Height of
base
Cylinder
diameter
Not required
P600 = 5
Cylindrical half sphere base
Cylinder
diameter
Not required
Not required
P600 = 6
Cylindrical flat sloped base
Height of
base
Cylinder
diameter
Not required
P600 = 7
Rectangular flat sloped base
Height of
base
Width of
rectangle
Breadth of
rectangle
P600 = 8
Horizontal cylinder flat ends
Length of
cylinder
Cylinder
diameter
Not required
P600 = 9
Horizontal cylinder parabolic
ends
Length of
cylinder
Cylinder
diameter
Length of
one end
P600 = 10
Sphere
Sphere
diameter
Not required
Not required
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).
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P605 Volume Units
This parameter determines the units that you wish to display, for volume
conversion. It is used in conjunction with P607 (maximum volume), and the
units are shown on the display (subject to P810). The choices are:
OPTION
DESCRIPTION
0 = No units
Volume will be totalised with no units
1 = Tons
Volume will be totalised in Tons
2 = Tonnes
Volume will be totalised in Tonnes
3 = Cubic metres (Default)
Volume will be totalised in Cubic metres
4 = Litres
Volume will be totalised in Litres
5 = UK Gallons
Volume will be totalised in UK Gallons
6 = US Gallons
Volume will be totalised in US Gallons
7 = Cubic Feet
Volume will be totalised in Cubic Feet
8 = Barrels
Volume will be totalised in Barrels
9 = lbs (pounds)
Volume will be totalised in lbs (pounds)
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+, 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).
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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
DESCRIPTION
1 = Measured (Default)
Display in Measurement Units (P104)
2 = Percentage
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
DESCRIPTION
1 = Known (Default)
Remain at the last known value
2 = High
Will fail to the high value (100% of span)
3 = Low
Will fail to the low value (empty)
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.
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mA Output (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
DESCRIPTION
0 = Default
mA output will fail as per P808.
1 = Hold
mA output will retain its last known value.
2 = Low
mA output will fail to its low condition. 3.5mA
3 = High
mA output will fail to its high condition. 22mA
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P842 Voltage Output
This parameter will determine the range of the voltage output. The voltage
output will automatically be scaled to represent the Span P106 where
0volts represents 0% (empty) and maximum voltage 5 or 10 volts,
depending on range selected, will represent 100% (full).
OPTION
DESCRIPTION
0 = 5 volts
Voltage output range will be 0 – 5 volts
1 = 10 volts
Voltage output range will be 0 – 10 volts
Compensation (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 derived from the transducer, and
will affect everything including the reading on the display, the relay
setpoints and the mA output.
P852 Temperature Source
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
DESCRIPTION
1 = Internal (Default)
Always uses temperature reading from transducer.
3 = Fixed
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
Important Notice
In the event of a failsafe condition occurring, the voltage output will fail
in accordance with the Failsafe Mode P808
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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
SOUND VELOCITY
Chlorine
206 m/sec
Argon
308 m/sec
Oxygen
316 m/sec
Air
331.5 m/sec
Ammonia
415 m/sec
Methane
430 m/sec
Helium
435 m/sec
Neon
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
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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) 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.
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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, all parameters, except for 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 must 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.
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CHAPTER 6 TROUBLESHOOTING
This section describes many common symptoms, with suggestions as to
what to do.
SYMPTOM
WHAT TO DO
Display blank, transducer
not firing.
Check power supply
Display shows LOE
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.
Incorrect reading being
displayed for current level
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.
Material level is consistently
incorrect by the same
amount.
Check empty level (P105) correctly entered.
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CHAPTER 7 DISPOSAL
Incorrect disposal can cause adverse effects to the environment.
Dispose of the device components and packaging material in accordance
with regional environmental regulations including regulations for electrical \
electronic products.
Transducers
Remove power, disconnect the Transducer, cut off the electrical cable and
dispose of cable and Transducer in accordance with regional environmental
regulations for electrical \ electronic products.
Controllers
Remove power, disconnect the Controller, and remove battery (if fitted).
Dispose of Controller in accordance with regional environmental regulations
for electrical \ electronic products.
Dispose of batteries in accordance with regional environmental regulations
for batteries.
EU WEEE Directive Logo
This symbol indicates the requirements of Directive 2012/19/EU regarding
the treatment and disposal of waste from electric and electronic equipment.
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www.pulsarmeasurement.com
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Copyright © 2020 Pulsar Measurement Ltd.
Registered Address: 1 Chamberlain Square CS, Birmingham B3 3AX
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