London Electronics INT-AH User manual

Document Ref:pm65\manuals\INTUITIVE_AH Revision:1 Dated: 31 July 2003
IEC 1010
89/336/EEC
Ampere Time Display Meter
Plating Current monitor with pulsed outputs
Model INT-AH
Rev AH 1.1 Software Version
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
▲RESET
▲
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.
Amp
mins.

Notes

Alphabetic Index
Alarm board Configuration 10
Alarms, how to set 11
Calibration 6
Calibration Examples 7
Calibration - Tamper detection 8
Connections 5
Decimal point position selection 6
Declaration of Conformity 17
Failsafe alarm setting 10
General description 3
Getting Started 4
Installing options 9
Introduction 1
Input connection examples 5
Reset command 8
Revisions record 13
Specifications 12
Warnings 2

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Page 1
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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 the software version if you press the
left-hand button while you apply power to the meter.
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 ONLY install 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 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 millivolt
signal, typically from a DC current shunt. This meter can accept shunts with
50mV, 60mV, 75mV and 100mV outputs.
The meter can give alarm outputs, scaled and isolated analogue output and isolated
serial data retransmission when fitted with appropriate plug-in option boards.
Alarm outputs 2 and 4 give pulsed outputs of 100mS, each time a batch total has
been reached.
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 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.
Page 3
“Units of
measure”
window
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
▲RESET
▲
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.

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 alarm relay output options, you may need to configure the board
before installing the meter in a panel. See the separate sections in this manual for
that option.
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.
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 alarm
settings, if necessary. 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 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.

Unused
Signal -
Unused
Signal +
Unused Unused
INPUT REMOTE
Earth
Neutral
Line
AL1 AL1 AL2 AL2 AL3 AL3 AL4 AL4
OPTIONAL ALARM RELAY OUTPUTS
POWER
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 shunt end.
The shunt should be located in the low voltage unswitched return line to
minimise common-mode noise.
These connectors are only used when options are fitted
Connections
E - +
Common
No function
Disp. Current
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
ON permanently
OFF permanently
Lockout Switch
Page 5
1 2 3 4 5 6
+ Current
+ mV
- Current
- mV
SHUNT
AL2 and AL4 are pulsed
outputs

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 will see ‘Int H’ or ‘Int M’ to allow you to calibrate in counts per hour or
minute. Select the most appropriate, and press OK (Int H is used for Ampere
Hours)
You’ll now see ‘In HI’ briefly, then a value, with one digit brighter than the
other. This is set to the mV output of your shunt at rated current, usually 50, 60 or
75mV. 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 minute, depending on whether you chose ‘Int H’ or ‘Int M’. For ampere hour
applications, this is normally the rated current of your shunt. 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 normally set to 0. If already cor-
rect, 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 normally st to 0. 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. You have a 75mV shunt rated at 200 Amperes and want to display ampere
hours to a resolution of 0.1Ah
a. Set ‘Int H’ because you want to count ampere HOURS
b. Set InHi = 75.00 mV
c. Set rd Hi to 200.0
d. Set InLO to 0.00 mV
e. Set lo Rd to 0
2. You have a 60mV shunt rated at 100 Amperes and want to display ampere
hours to the nearest Ah
a. Set ‘Int H’ because you want to count ampere HOURS
b. Set InHi = 60.00 mV
c. Set rd Hi to 100
d. Set InLO to 0.00 mV
e. Set lo Rd to 0
Page 7

Page 8
Features
Calibration Counter / Tamper detector
An internal totaliser counts each calibration. To see the cal count, press the left-
hand button at power-on. 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. It stores the total in non-volatile
memory which can’t be reset, so is useful for keeping track of the meter’s cali-
bration 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 ‘Actual Current’ Command
The ‘display rate’ input allows you to see the instantaneous current. It may be
accessed either from the front panel or by external contact closure command.
Front Panel key Current display command
Press the UP arrow key to see actual current.
Remote contact closure rate display command
1) Connect a normally-open contact closure switch between terminals 7 and 9
2) When you make a contact closure between terminals 7 and 9, the display
will show the intantaneous value, for as long as the contact is closed.

How to install alarm 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...
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
1234567890123456
1234567890123456
1234567890123456
1234567890123456
1234567890123456
1234567890123456
1234567890123456
1234567890123456
1234567890123456
1234567890123456
1234567890123456
1234567890123456
1234567890123456
Alarm relays.
Depending on the
option, there will be
2 or 4 relays fitted.
Upper option board
Main board
Page 9

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 10
AL1 AL2 AL3 AL4

Page 11
Alarm settings
NOTE : totalisation stops during alarm adjustment
Alarm 1 and 3 relate to the accumulated total. Alarm 2 and 4 relate to pulsed
outputs.
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 pushbutton.
When the value has been set, press OK.
The alarm action is now displayed. This will show ’HI’ for HIGH alarm action,
or ‘off’ for NO alarm action. You can change this with the UP/DOWN buttons.
Press OK when set.
Alarm channel LED will
flash.
Here, we see that Alarm
1 has its setpoint at
250.00
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
▲RESET
▲
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.

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 8VA maximum
Input Signals 0-100mV range, for 0-50mV, 0-60mV, 0-75mV shunts
Input Resistance >1 Megohm
Accuracy +/-0.05% of range
Span tempco 50ppm/Degree Celsius
Zero Tempco +/- 2microvolts per Degree Celsius
A/D conversion Dual slope 10 conversions per second. Resolution 1 in
63000 max. over full range
Display update rate 2.5 readings per second.
Memory of total E2PROM with 10 year storage. No batteries required
Plug-In Output Options
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. Alarms
relate to the accumulated total or batch subtotal (alarms 2
and 4, which activate for 100mS) at up to 5 pulses per
second.
Relay life Contact life: Greater than 106operations at less than 1A
250V switching, rising to 107 operations at
10mA switching. Resistive loads only.
Mechanical life: 30 x 106operations
Page 12

Page 13
Record of Revisions/Changes
.31 July 2003 Released

Notes
Page 14

Page 15
48.0
96.0
92.0
22.0 102.0 12.0
DIGIT
Min.
ZERO SPAN / dp
ZERO SPAN & d.p.
MAX / MIN
TARE
ALARMS
OK
▲RESET
▲
OUTPUT
AL1
AL2
AL3
AL4
0% O/P 100% O/P
Lineariser
Max.

Page 16
12.0 102.0 22.0
44.0
92.0
45.0

Page 17
Declaration of Conformity
Conditions
The meters are permitted a worst case error of 1% of A/D range during electro-magnetic disturbance,
and must recover automatically when disturbance ceases without the need for human intervention, such as
resetting, power-down etc.
The meters covered by this certificate must be installed in adherence to the following conditions :-
Signal cabling shall be routed separately to power carrying cabling (includes relay output wiring)
All signal cabling shall be screened. The screen shall only be terminated to the power earth terminal
This is to confirm that the Product covered by this declaration have been designed and manufactured to
meet the limits of the following EMC Standard :
EN61326-1:1997
and has been designed to meet the applicable sections of the following safety standards
EN61010-1:2001
Declaration Reference : INTUITIVE
Issue Date : 9 October 1998 revised 31 July 2003
Products Covered : INTUITIVE series
Title : DOC-INTUITIVE