London Electronics INTUITIVE-I User manual

Document Ref:pm65\manuals\INTUITIVE_I Revision:4 Dated: 1 July 2009
Model INTUITIVE-I
IEC 1010
89/336/EEC
Totalising Digital Process Indicator / Controller
4-20mA / 0-10V input
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
s
RESET
s
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.
Patent App. Numbers :- UK=GB9820695.6, EU = 99307553.0, USA 09/401738, Canada 2283378
London Electronics Limited
Thorncote Green, Near Hatch, Sandy, SG19 1PU, England
Tel: [phone] Fax: [phone] International prefix +44
E-Mail [email protected]
Web site with full catalogue, news, distribution details, http://www.london-electronics.com

Alphabetic Index
Alarm board Configuration 11
Alarms, how to set 12
Analogue Output configuration 14
Analogue output, how to set 15
Calibration 6
Calibration Examples 7
Calibration - Tamper detection 9
Connections 5
Count-By (last digit round-up) adjustment 8
Decimal point position selection 6
Declaration of Conformity 20
Failsafe alarm setting 11
Filter time constant selection 8
General description 3
Getting Started 4
Hysteresis adjustment 12
In-Flight compensation facility 13
Installing options 10
Introduction 1
Input connection examples 5
Programme memory facility 17
Reset command 9
Revisions record 19
Serial Communications 16
Specifications 18
Warnings 2

-
Page 1
-
Important Introductory Notes
Please feel welcome to contact us if you need help, have a complaint, or if you
have suggestions for improving our products or services.
If you contact us about a product you already have, please give us as much
information as you can, so we can give you accurate and swift help.
Software Version: The display will show VEr. X.X shortly after being switched
on. The value X.X is the software version which you must quote when contacting
us about technical matters.
Our products have a 2 year warranty, and we will put right or replace any meter
found to be faulty through bad workmanship or materials. This warranty does
not cover damage caused by misuse or accident.
IMPORTANT If the meter is a vital component in your process, you may wish
to buy a spare to cover possible failure or accident, as we cannot guarantee
instant repair or replacement. We always try to improve our products and
services, so changes to instruments will occur. Please keep this manual safely
for future reference, as future manuals, covering revised designs may no longer
describe your product accurately.
We believe these instructions are accurate, and that we have competently designed
and manufactured the product. We do not make any claims as to the suitability of
this product for any particular application. The choice of product and
responsibility for the choice lies with the User.
Our full terms and conditions of trading are available on request.

Page 2
Safety First ..............Don't assume anything............. Always double check.
If in doubt, ask someone who is QUALIFIED to assist you in the subject.
* Connect the meter according to current IEE regulations and separate all wiring
according to IEC1010.
* Power supplies to this equipment must be anti-surge fused at 125mA for 230V
supply, 250mA for 110V supply or 1A for DC supplies in the range 11-30VDC.
* Check that model number and supply voltage suit your application before you
install the meter.
* Don’t touch any circuitry when the meter is powered, because lethal voltages
may be present on the circuit board.
* We have designed this product for Installation class II service.
* We have designed this product for use in Pollution-Degree 2 environments.
* Only adjust switches or connections with the power removed.
* Ensure all screw terminals are tight before applying power.
Warnings
Please carefully read all warnings and ONLYinstall the meter
when you are sure that you’ve covered all aspects.
!

General Description
This meter has been designed to be simple to configure. It is easy to use because
no menu is used. Look at the front panel below... to adjust ZERO you press the
ZERO button, to adjust Span you press the SPAN button, to adjust Analogue
Output you press the OUTPUT button, to adjust Alarms you press the ALARM
button. There is no need to spend time learning a complex menu system.
The meter’s main function is to totalise (or integrate) from a linear process
signal. So, it will accept the most common process signals such as 4-20mA, 0-
10V etc. You can use the 24V excitation supply to power 2 wire transmitters, 3
wire transmitters etc.
The meter can give alarm outputs, scaled and isolated analogue output and isolated
serial data retransmission when fitted with option boards.
The front panel has a 6 digit, 7 segment window for displaying the measurement.
It allows decimal point and minus sign characters to be included and has 4
alarm annunciators to show the status of each alarm relay.
The front panel pushbuttons each have an LED to show which setting is being
altered at any time. A clear protective window is provided, behind which you
can fit one of our ‘Units-of-Measure’ labels, to identify the reading as Kg, or
Litres, barrels etc.
A lockout switch on the rear of the meter saves your configuration settings in
non-volatile memory, which has a 10 year guaranteed storage period. If the lockout
switch is not set ON, your settings could be accidentally altered.
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
s
RESET
s
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.
“Units of
measure”
window
Page 3

Page 4
Getting Started
First, please check that the display will suit all the requirements of your
application. Page 4 has some important warnings - please check that all warnings
are covered.
If you have analogue output or alarm relay options, you may need to configure
their boards before installing the meter in a panel. See the separate sections in
this manual for those options.
Check that your panel cutout is correct , 92mm wide, 45mm high. You must fit the
meter in a protective enclosure for installation class II service. Remove the 2
screws holding the U clamp at the rear of the case. Slide the meter into the cutout
and re-fit the U clamp and screws. Tighten the screws just enough to hold the
meter firmly in place and make sure the sealing gasket is evenly held between
the panel and the bezel.
Connect the signal and power cables, to the appropriate screw terminal connectors.
Check that you are using the correct terminals or you may cause damage to the
meter. Do not connect any output or alarm cabling yet.
Apply power, and confirm that the meter illuminates all segments for a few
seconds and then shows the software version “VEr. X.X” briefly (The X numerals
depend on version).
The lockout switch should be OFF to allow you to change the meter’s settings.
Set the scaling to suit your system, using one of the scaling methods described in
this manual. Check that the meter responds correctly. Now, adjust your analogue
output settings, if necessary, and alarm settings. Use a DVM of sufficient precision
to check that the analogue output is operating as required, and use a continuity
tester to check that the relay contacts operate correctly. Switch the meter off, and
check alarm relay contact status. Check that the contact status suits your system,
in conditions of power loss to the meter.
When you have verified all settings, you can connect the alarm relay and analogue
output cables, to check that your system operation is satisfactory.
Remember to set the lockout switch ON when you have finished , to prevent
accidental loss of your settings.

Excitation -
Signal -
Current I/P
Voltage I/P
Unused
Excitation +
INPUT REMOTE
Earth
Neutral
Line
AL1 AL1 AL2 AL2 AL3 AL3 AL4 AL4
ALARM RELAYOUTPUTS
POWER
Serial
Output
Cabling should be screened and routed away from noise-carrying cables and
machines to reduce interference. The screen can be connected to power earth if
it is not already grounded at the sensor end.
These connectors are only used when options are fitted
Connections
Neg. Pos.
Sig+ Sig- Comm Enable
E - +
123 4 5 6
4-20mA 2 wire transmitter 4-20mA direct 4-20mA 3 wire transmitter 0-10V direct
Analogue
Output
Common
No function
Disp. RATE Reset total
IMPORTANT!
Set the right-hand switch to its upper ‘LOCK’ position after setup, to save your settings.
REAR VIEW
Mains Power model
DC Power model
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
123 4 5 6 123 4 5 6 123 4 5 6
- +
- +
Common
Signal Out
Excitation
- +
ON permanently
OFF permanently
Lockout Switch
Page 5
NB - Switches have changed! Red switches had ON=UP. Blue switches have ON=DOWN

Calibration
Set switch 1, near the input connector ON and lockout switch OFF
1) How to set SPAN and DECIMAL POINT
Press the SPAN button for 3 seconds. You’ll see ‘dC V’ or ‘dC A’ if the meter is
set for DC Voltage or DC current. Use the up or down arrow to change, if
needed and then press OK.
You will now see ‘Int H’ or ‘Int d’ to allow you to calibrate in counts per hour or
day. Select the most appropriate, and press OK
You’ll now see ‘In HI’ briefly, then a value, with one digit brighter than the
other. This is 20.000 for a 4-20mA input signal, or 10.000 for a 0-10V input
signal, 5.000 for a 1-5V input signal and so on. If the value is correct, press the
‘OK’ button, otherwise use the ‘DIGIT’ key to select digits, and the ‘UP’ or
‘DOWN’ arrow keys to alter. When correct, press the ‘OK’ button.
‘rd HI’ appears briefly, then a value, with one digit brighter than the other. This
is what will be displayed for the IN HI input, at full scale, after 1 hour or 1 day,
depending on whther you chose ‘Int H’ or ‘Int d’. If the value is correct, press the
‘OK’ button , otherwise use the ‘DIGIT’ key to select digits, and the ‘UP’ or
‘DOWN’ arrow keys to alter . The Decimal point position may be set after the
most significant digit has been selected. When correct, press the ‘OK’ button.
See the following page for examples ...
2) How to set ZERO
Press the ZERO button for 3 seconds. You’ll see ‘IN LO’ briefly, then a value,
with one digit brighter than the other. This is 4.000 for a 4-20mA input signal,
0.000 for a 0-10V input signal, 1.000 for a 1-5V input signal etc. If already
correct, press the ‘OK’ button. Or, use the ‘DIGIT’ key to select digits, and the
‘UP’ or ‘DOWN’ arrow keys to change. When correct, press the ‘OK’ button.
You’ll now see ‘LO rd’ briefly,then a value, with one digit brighter than the
other. This is what will be displayed for the IN LO input. If already correct,
simply press the ‘OK’ button. Or, use the ‘DIGIT’ key to select digits, and the
‘UP’ or ‘DOWN’ arrow keys to change. When correct, press the ‘OK’ button.
See the following page for examples ...
Now, please set the LOCKOUT switch ON to protect your settings
Page 6

Calibration Examples
1. 4 to 20mA = 0 to 300m3per day flow rate.
You want to display total m3passed
a. Set ‘Int d’ because your flowrate is described in m3per day
b. Set InHi = 20.000mA
c. Set rd Hi to 300 (after 24 hrs at 20mA, the display will reach 300)
d. Set InLO to 4.000 mA
e. Set lo Rd to 0 (At 4mA you want no accumulation)
2. 4 to 20mA = 0 to 100 litres per hour
You want to display total litres, to 2 decimal places.
a. Set ‘Int H’ because your flowrate is described in litres per hour
b. Set InHi = 20.000mA
c. Set rd Hi to 100.00 (after 1hr at 20mA, the display will reach 100.00)
d. Set InLO to 4.000 mA
e. Set lo Rd to 0 (At 4mA you want no accumulation)
Page 7

LSt = 1 Best resolution, but most sensitive to noise. Sequence 0,1,2,3,4,5,6 ...
LSt = 2 Sequence 0,2,4,6,8,0...
LSt= 5 Sequence 0,5,0,5...
LSt=10 Sequence 0,10,20,30...
LSt=20 Sequence 0,20,40,60...
LSt=50 Lowest resolution, least sensitive to noise Sequence 0,50,100,150...
Filter and Last Digit Roundup
Press the OK button 5 times to access the filter time constant, which is expressed
in seconds. You can use the filter to improve your display stability with fluctuating
input signals. Use the UP and DOWN buttons to select a time constant in the
range 0 to 5 seconds. Bigger time constants give more stability but slower
response. Press OK when selected.
The Time constant of this digital filter is very similar to the time constant of an RC filter where
T=RC . The time constant is the time it takes for the display to reach 63 % of its final reading value,
after a step change on the input. You can see that if you select a 1 second filter time, it will take
several seconds for the meter to reach its final value. To give improved response to large step
changes, we momentarily cancel the filter action for stable input step changes of over 64 counts,
and then re-apply the filter to maintain stability.
Another function which can give you a more stable display, with less flicker is
the LAST DIGIT ROUNDUP.
After the filter setting, the display will show LSt and a number. This number sets
the increments by which the meter will change its reading.
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
s
RESET
s
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.
time...
Input signal step
Display settling curve
63% of final
settling value
t0tc
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
s
RESET
s
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.
Use the UP/DOWN buttons to
select a roundup value, and
accept by pressing OK.
Page 8

Page 9
Features
Calibration Counter / Tamper detector
An internal totaliser counts each calibration. The ‘CAL XX’ value appears for a
second or two after you switch the meter on. The number starts at 00 and can go
up to FF (255 counts). It doesn’t count changes of setpoints, or changes of filter
value or count-by value . It stores the total in non-volatile memory which can’t
be reset, so is useful for keeping track of the meter’s calibration history.
Reset Command
The reset command clears the accumulated total. It may be accessed either
from the front panel or by external contact closure command.
Front Panel key reset command
1) Link terminal 7 to terminal 10
2) Set lockout switch ‘ON’
3) Press Down Arrow key to reset display
Remote contact closure resetting
1) Connect a normally-open contact closure switch between terminals 7 and 10
2) Set lockout switch ‘ON’
Display Rate Command
The ‘displat Rate’ allows you to see the instantaneous flow rate. It may be
accessed either from the front panel or by external contact closure command.
Front Panel key rate display command
1) Link terminal 7 to terminal 9
2) Set lockout switch ‘ON’
3) Press Down Arrow key to see rate
Remote contact closure rate display command
1) Connect a normally-open contact closure switch between terminals 7 and 9
2) Set lockout switch ‘ON’
3) When you make a contact closure between terminals 7 and 9, the display
will show the intantaneous rate value, for as long as the contact is closed.

How to install option boards
If you want to open the meter to install or modify option boards, follow these
steps...
1) Switch off power to the meter and unplug all connectors.
2) Unclip the front bezel. This is easier if you squeeze the top and bottom of
the case, near the front.
3) Remove the small screws shown in the diagram. If the meter doesn’t yet
have an output option board, the top screw may not yet be fitted.
4) Slide the electronic boards out throught the front of the case. You can easily
separate the upper option board from the
main board. We strongly suggest that you
use anti-static precautions toprevent
damage to the semiconductors.
The board assemblies will look something like this...
The analogue output and RS232 or RS422 plug-in option boards are fixed to the
upper option board with white plastic pillars. You must apply a firm force when
fitting or removing these options.
Always be careful to connect the pins to sockets accurately. When reassembling,
make sure option boards are firmly fixed to the upper option board. When the
boards are replaced in the case, secure them again with the two small black
screws.
Plug- In
Microprocessor
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
1234567890123456789012
RS232 or RS422
plug-in option
Analogue output
plug-in option
Alarm relays.
Depending on the
option, there will be
none, 2 or 4 relays
fitted.
Upper option board
Main board
Page 10

Open Contacts
Closed Contacts
Energise De-energise
Energise De-energise
Energise De-energise
Energise De-energise
Alarm Board Configuration & Adjustment
For failsafe operation (where contacts open on alarm or when power is lost to
the meter) set the jumpers for OPEN CONTACTS and DE-ENERGISE on alarm.
To access to the alarm board, first remove power from meter, including any
power which might be on the alarm output circuitry.
Look on the top and bottom surfaces of the case, near the rear. You will see two
small screws, one on each surface. Remove both screws. Now, clip off the front
bezel and slide the meter assembly carefully out via the front of the case.
The relay board plugs into the main board. Gently separate the two boards.
Select relay output contact
status, when relays are
de-energised (power removed
from meter) by placing these
jumpers...
and set these jumper to make
the alarms energise or de-
energise on trip. De-energise
means you will get an alarm if
power is lost to the meter.
When you have set the jumpers, refit the board to the meter and carefully slide
the assembly back into the case.
Fit the two small board screws to the top and bottom surfaces.
Page 11
AL1 AL2 AL3 AL4

Alarm settings
If you press the ALARMS button momentarily, you can view each of the 4 alarm
settings (each press will illuminate in turn AL1, AL2, AL3 and AL4 LEDs).
Alarm settings are not locked out by the lockout switch.
To change alarm settings, select the alarm you wish to change as shown above
until its LED is flashing, then press the ALARM key for more than 3 seconds.
You will see one digit is brighter than the others. You can change its value using
the UP/DOWN buttons, and then select other digits with the DIGIT SELECT
pushbutton.
The alarm action is determined by the left-hand character. This will show an’H’
for HIGH alarm action, an ‘L’for LOW alarm action, or a ‘o’ for NO alarm
action. You can change this with the UP/DOWN buttons. Press OK when set.
The HYSTERESIS value is identified with a ‘HY’ prompt, and you can change
this to suit your requirements, in the same way as the alarm value.
The hysteresis value is directly related to your measurements, so, for example, if
you have a high alarm, set to 500 , and set the hysteresis value to 7, the alarm
will occur when the meter reading rises above 500, and will reset when the
meter reading falls to 493 . If the hysteresis is set to 9999, the alarms will be
provided with ‘IN-FLIGHT’ compensation (automatic correction for overshoot)
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
s
RESET
s
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.
Alarm channel LED will
flash.
Here, we see that Alarm
1 is a high alarm with its
setpoint at 250.00
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
s
RESET
s
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.
Page 12

In-Flight Compensation
You can configure the meter to have in-flight compensation, which can improve
alarm accuracy in some applications.
Here’s how it works....
Imagine you have a storage container and you want to empty a certain amount of
material from that container into a bin.
The meter will automatically compare the desired setpoint level to the actual
final fill or empty weight, or position, and compensate for any calculated error
for the next cycle This is a continuous process, so if material consistency varies
and the in-flight error varies, the meter automatically adapts after each operation.
For the first alarm, the meter will correct for 100% of the measured error, to get
as close to desired action as possible. Then, each time the alarm occurs, it will
correct for 25% of the previous smaller error, to reduce the effects of material
variations.
To use the inflight compensation, set Hysteresis to 9999 for the alarm channels
you need it to operate on.
Material ‘In Flight’
Shutoff Valve
Weighing platform
Bin being filled
Storage container
250.0
Kg
weight signal
Alarm
When the bin reaches the desired
weight, the meter will switch off the
shutoff valve. But, a certain amount of
material is still falling into the bin, and
will add to the weight, causing an
overweight error.
Page 13

Page 14
Analogue Output Configuration
We always set the meters to suit any requests on your order, so you should not
need to adjust the analogue board. If you didn’t specify ranges, but ordered
option ‘ANI’, the meter will be set for 4-20mA output. If you ordered ‘ANV’ it
will be set for 0-10V.
If you want to change a range, for example from 0-10V to 4-20mA, the zero and
span potentiometers must be adjusted to get best accuracy at 0% and 100%.
You will need to remove the analogue board from the case to change the position
of jumpers and to adjust the fine trim potentiometers. See the page headed “ How
to fit Option Boards” for details of how to expose this board. The analogue
board, if fitted, can be seen plugged into the upper board, and can be easily
identified because it has either 2 or 3 blue potentiometers, depending on version.
You will need to carefully unplug the analogue output board from the upper
board and change the jumper positions to suit your new range, as shown below.
Re assemble the meter, apply power and follow the Analogue Output Settings
procedure on the next page. Measure the analogue output and trim, if needed,
using the ZERO and SPAN potentiometers, for best accuracy.
-5 to 0 to +5V 0-10V 4-20mA
1234567
1234567
1234567
1234567
1234567
1234567
ZERO SPAN
1234567
1234567
1234567
This potentiometer may not be fitted on all boards.
It is only to be adjusted in the factory.

How to adjust your Analogue Output
The lockout switch should be set ‘OFF’ to change the analogue output calibration.
You can set the analogue output range to suit your display range.
The analogue output can be directly proportional or inversely proportional to
the display range, for example you can have 4-20mA output for display 0 to100
or for display 100 to 0.
1) Press ‘OUTPUT’ button for 3 seconds
2) 0% O/P LED should flash
3) Set the display for the reading value where you want 0% Output, by using
DIGIT and UP/DOWN buttons
4) When set, press the OK button.
5) Now the 100% O/P LED should flash
6) Set the display to the reading value where you want 100% Output, by using
DIGIT and UP/DOWN buttons
7) When set, press OK, to complete your adjustment of the analogue output
scaling
Please remeber to set the lockout switch ‘ON’ to save your settings.
Page 15
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
s
RESET
s
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Limeariser
Max.
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
s
RESET
s
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.
Jumpers on Analogue Board 0% gives
4-20mA 4mA
0-10V 0 V
-5 to +5V -5V
So in this example, if you set the jumpers for
4-20mA, you will get 4mA output when the
display is 50.00
Jumpers on Analogue Board 100% gives
4-20mA 20mA
0-10V 10 V
-5 to +5V +5V
So in this example, if you set the jumpers for
4-20mA you will get 20mA output when the
display is 350.00

Serial Communications Output Option
You can have either an RS232 or an RS422 ASCII output at 1200 baud
representing the meter’s displayed value. You can have a continuous transmission
of readings, or a single transmission on demand.
RS232 O/P on terminal 16 (data+) and terminal 18(common)
RS422 O/P on terminals 16 & 17(Data + and -) and 18 (common)
String Format:
Data is made ASCII coded numerals, with embedded decimal point position if
one has been set on the display, with a preceding - sign if the display is negative,
with leading zero blanking, followed by a Carriage Return and a Line Feed.
So, for a displayed value of....
12345 the string will be <space><space><1><2><3><4><5><CR><LF>
-15.0 the string will be <space><space><-><1><5><.><0><CR><LF>
Commands:
The data output port is activated by connecting to the ENABLE terminal.
For RS232, the ENABLE port must be held high at a 5V level for as long as
serial data output is required, or, if only one string of data is needed, the ENABLE
line must be held high until the transmission starts, after which it may be taken
low again. The Sig- connection on terminal 17 may be used to provide the 5V
level if an external source is not available
For RS422, the ENABLE port operates in reverse, so must be held low to
enable transmission.
If you need a remote mimic display, the Model INTUITIVE-S is an ideal choice,
being a 1/8 DIN meter directly compatible with this output format.
Also, we manufacture a range of Large Format remote displays having digit
heights of 57mm, 102mm, 144mm, 200mm and 280mm. Ask us about the 1700
Series and the EasyReader Series.
Page 16

Page 17
8 Programme Memory Option
With the MEM-08 option, you can store up to 8 sets of configuration and
calibration data. This is useful if you want to connect a number of different
sensors, each with different calibration, to the meter, selected by rotary switch.
Each memory location can have its own input/display calibration, alarm settings,
and analogue O/P calibration. NB The linearisation facility is not available
with this option.
Memory locations are addressed using an external switch. If you need up to 4
memories, you may use a simple rotary switch. If you need more than 4 memories
you must use a BCD coded switch, as shown below.....
7 8 9 10
Common BCD 1 BCD 2 BCD 4
7 8 9 10
Common BCD 1 BCD 2 BCD 4
6
Simple rotary switch BCD coded switch
Programming Notes:
Memory location 0 is a ‘GLOBAL’programming location. When you programme
location 0 , the same data will be written to all the other memory locations as
well. Therefore, always programme location 0 first. However if you switch off
the switch next to the input connector, before programming location 0, this effect
will not occur. The switch will then have to be set ON if you wish to access the
other memories. If this feature is undesirable in your system, you should limit
the number of programmes to 7 and arrange your switching to prevent location 0
from being accessed.(ie never have all BCD select lines disconnected from
Common)
All programmes are stored in non-volatile EEPROM memory, which has a typical
storage life of 10 years, and which does not rely on battery backup.
If you wish to use a rotary switch to
select up to 8 memory locations, and
to switch up to 8 two-wire signals,
we make a 1/8 DIN rotary switch
model SW2P8W-BCD for this
purpose.

Equipment Specifications
Bezel size 48mm high by 96 mm wide (1/8 DIN)
Panel Cutout 45 mm high by 92 mm wide
Case Depth 125 mm including connectors
Weight 300 grammes
Case Material Black polycarbonate
Connectors Detachable Screw Terminal connectors
Power 95-265 VAC or 11-30 VDC optional
Burden 8VAmaximum
Input Signals 4-20mA 0-10mA 0-10VDC 1-5VDC Custom Ranges
Input Resistance 33 Ohms 33 Ohms 1 Meg 1 Meg Ask factory
Accuracy +/-0.05% of range
Span tempco 50ppm/Degree Celsius
Zero Tempco 20ppm/Degree Celsius
Excitation voltage 24VDC +/- 20% rated at 50mA
Filtering / smoothing Selectable time constants of 0 to 5 seconds.
A/D conversion Dual slope 10 conversions per second. Resolution 1 in
63000 max. over full range
Display update rate 2 readings per second.
Memory of total E2PROM with 10 year storage. No batteries required
Plug-In Output Options
Analogue O/P 0-10VDC 4-20mA +/-5VDC
Drive capacity >1K Ohms <500 Ohms >1 K Ohms
Isolation 250 VAC Optically isolated
Linearity +/-0.02% of range, accuracy 0.1% of range
Resolution 12 bits
Update rate 10 per second (100 per second to special order)
Alarm Relay O/P 2 or 4 alarms SPST rated 5 Amperes at 250 VAC,
resistive load. Selectable normally open or normally
closed. Selectable energise or de-energise on trip.
ASCII Data O/P RS232 or RS422 ASCII Value of reading. 1200 baud.
Format 1 start bit, 8 data, no parity. <Measurement><CR>
Isolation 250 VAC optically isolated
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