Radiodetection Smart Interrupter 50AG Bedienungsanleitung

The Smart Interrupter provides a means of placing

a characteristic signature on pipes by interrupting

the ﬂow of cathodic protection (CP) current.

The Smart Interrupter is speciﬁcally designed for use with

the Radiodetection Stray Current Mapper (SCM) and

Pipeline Current Mapper (PCM+) but can also be used as a

stand-alone interrupter.

Smart Interrupter

USER GUIDE 90/NUG046/04

The Smart Interrupter is a solid state interrupter,

designed for use by the trained corrosion

technician on cathodic protection systems in

outdoor locations. For safe operation of the

equipment please ensure you read, understand

and follow the instructions in this guide.

User Controls

Power On/Off

Selects Stray Current Mapper (SCM).

Changes a ﬁeld, adjusts a time or changes a

selection and selects individual SCM signals.

Stops and starts the Smart Interrupter running.

Selects pulse mode. You can deﬁne on and off

pulsing periods – for example, On period 3 seconds,

Off period 8 seconds. Assists in signal identiﬁcation

when using more than one Smart Interrupter at the

same time.

With the timer function (GPS version only) you can

activate and de-activate the Smart Interrupter at

deﬁned times of the day – for example, activate at

7a.m., and de-activate at 5p.m., every day until you

disconnect the Smart Interrupter or you change the

timings.

Explanation of symbols used

Conﬁrms all selections.

Enables LCD contrast control.

Caution symbol / Read manual

Double insulation symbol

CE mark

WEEE symbol

Smart Interrupter

External connections

Output cable entries

Serial

synchronization

connector

socket

External

Power

GPS antenna

connector

socket

Anode cables

Rectiﬁer

Smart

Interrupter

Smart

Interrupter

Structure cable

Anode

Anode cables

Optional external supply

Connecting the

Smart Interrupter

Always switch off the CP

system before connecting

and disconnecting the Smart

Interrupter.

Before connecting

the Smart Interrupter to

the CP supply, measure

the maximum CP voltage.

Ensure that this voltage

is below the Smart

Interrupter’s peak limit

before connecting it.

Peak voltages:

DC 100VDC

AC 70VAC (average or RMS).

Connection to CP voltages

in excess of these limits

may cause damage to the

Smart Interrupter.

When connecting the Smart Interrupter to either the anode

cable or to the structure cable ensure that the red clip is

connected to the most positive connection point and the

black clip to the most negative connection point. If the Smart

Interrupter is connected the wrong way round it will indicate

incorrect connection with a warning tone.

The Smart Interrupter must only be used by suitably

trained personnel.

When connecting the external supply lead, always

connect it to the anode wire before plugging it into the

Smart Interrupter.

When disconnecting the external supply lead, always

remove it from the Smart Interrupter before disconnecting it

from the anode wire.

To prevent unauthorized access keep the Smart

Interrupter secure if it is left unattended when in use.

Operating the Smart Interrupter

(non-GPS version )

Note: Operating procedures are the same for both the 50

amp and 100 amp versions.

Press the Power On/Off button.

The ﬁrst screen is displayed for approximately 2 seconds,

after which time the second screen is displayed. This screen

displays the mode that the Smart

Interrupter was in when it was

last switched off.

If the screen shows anything other than “Running

SCM” or “Stopped SCM” press the SCM button to

return to the SCM screen. The following screen is

displayed.

Modes

The capability of the Smart Interrupter to generate any one

of 4 unique SCM output signals is a particularly helpful

feature if you are using the SCM with more than one Smart

Interrupter at the same time.

SCM Mode

The 4 selectable SCM output signals are numbered 0-3.

Press the right or left arrow button to cycle through

the output signals until the desired signal number is

displayed. If using several Smart Interrupters ensure

they have different signal output numbers.

The ‘Running SCM’

screen is displayed.

PPL Mode

Do not use this mode.

Pulse Mode

In pulse mode the Smart Interrupter puts a simple on/off

pulse onto the line and assists in signal identiﬁcation when

using more than one Smart Interrupter at the same time. If

using more than one Smart Interrupter make the pulse On/

Off times different for each unit.

Press the pulse mode button to select pulse mode.

The following screen is displayed with the On time

highlighted. Press the OK button to toggle between

On time and Off time.

To set the ‘On’ time, press the

left/right buttons until the desired

time is displayed and press OK.

The Off time is now highlighted.

To set the ‘Off’ time, press the left/right buttons until the

desired time is displayed.

Note: From 0 to 10 seconds the time increases in steps of

0.1 seconds. From 10 to 100 seconds the time increases in

steps of 1 second. Times can be changed with the Smart

Interrupter running or stopped.

Once you have set the On and Off times press

the Run/Stop button to start the Smart Interrupter

running and apply the signal to the pipe.

Pulse Switching Inversion

It is possible to invert the switching order of the pulse mode

patterns (this feature only works in pulse mode). This is

useful for dataloggers that require the CP potentials to be in

a speciﬁc order. The normal mode of operation is to switch

the CP On, then Off.

To make the unit switch the voltage Off and then On: Press

and hold the Pulse Key, press the OK key and then release

both keys. The display will toggle the On and Off times as

shown below. To revert to the previous switching mode,

repeat the key press sequence. The order of switching

(On-Off or Off-On) is stored with the pulse pattern and will

be recalled if using the previous mode recall feature.

Previous Settings

To retrieve any one of the last ten settings in pulse mode,

press and hold down the pulse button and at the same time

press either the left or right arrow button. The screen will

cycle through the last ten settings, showing the number of

each setting (1 is the most recent). When you have selected a

setting, release the pulse button and press the OK button. The

pulse mode screen is displayed

with the selected settings.

Timer Mode

It is not possible to activate the timer unless you are using

the GPS version.

If you press the timer button on a non-GPS unit, nothing

will happen and the button press will be ignored.

Contrast Screen

Press the contrast button to adjust the screen

contrast. The Contrast

screen is displayed.

Press the left/right arrow buttons to adjust the contrast to

the desired level. Contrast settings are from 1 (lightest) to

20 (darkest). The setting ‘wraps’ round from 1 to 20. To

select the desired setting, press OK or leave the buttons

untouched for 5 seconds.

Over Temperature Warning

If the Smart Interrupter overheats and operates the thermal

cut-out, the Over Temperature warning screen is displayed.

The Smart Interrupter keeps displaying this screen and all

buttons, except the power- off button, are disabled until

the thermal cut-out resets. Once the cut-out has reset the

Smart Interrupter resumes normal

operation in stopped mode.

Thermal Fuse

A thermal fuse is incorporated into the design to protect

against thermal runaway under fault conditions.

This fuse is not a user replaceable part. If it operates then

the complete smart interrupter must be returned to an

authorised service centre for repair.

Master-Slave Synchronization using the

synchronization lead

Note: This method is not recommended when using the

Smart Interrupter with the SCM.

When using several Smart Interrupters at the same time they

must be time synchronized with each other to ensure signal

compatibility. Use this method to synchronize non-GPS units

or a GPS unit and non-GPS unit.

Each Smart Interrupter is supplied with a synchronization

cable labelled “Master” at one end.

Synchronization symbols are:

Master (serial synchronization)

Slave (serial synchronization)

To synchronize two Smart Interrupters, using the

synchronization lead, proceed as follows:

• Switch on the two Smart Interrupters and ensure they are

in the same mode and are both set to ‘Running’. They will

not synchronize if in different modes.

• Plug the synchronization cable “Master” end into the

serial synchronization cable socket on one of the units.

This unit becomes the Master.

• Plug the other end of the cable

into the other Smart Interrupter.

This becomes the Slave.

The two Smart Interrupters

will automatically synchronize.

The slave Smart Interrupter

will emit a short beep when

a time mark is received.

If there is a mismatch between master and slave patterns

the slave will emit a continuous tone until the mismatch is

corrected. When synchronization is complete the following

screen will be displayed.

To synchronize another slave unit remove the slave end of

the cable from the slave unit and ﬁt it into the next slave unit.

Repeat the synchronization procedure until all slave units have

been synchronized with the master. The master and slave units

will remain synchronized for a minimum of 24 hours or until a

unit is switched off or you change its settings. When a Smart

Interrupter is a slave synchronized unit, an ‘s’ is displayed on

the screen. When the synchronization cable is removed from a

Smart

Interrupter 100 AG

Smart

Interrupter 100 AG

Master Slave

master synchronized Unit, an ‘m’ is

displayed on the screen.

If you attempt to change a setting that would make the

master/slave patterns incompatible, the Smart Interrupter

emits a 2-second tone and the following screen is displayed.

Pressing the OK button will allow the settings to be

changed but with no further warnings being displayed,

and synchronization may be lost. The unit will remain

synchronized if any other button is pressed or 5 seconds

have elapsed.

If you attempt to switch off a Smart Interrupter that has

been synchronized with a serial lead the following screen

is displayed accompanied by a warning beep. If you select

Yes and press OK the unit will switch off. If you select No

and press OK the unit remains

switched on and synchronized.

If synchronizing a non-GPS version and a GPS version use

the synchronization cable method to synchronize units. Using

the GPS antenna to synchronize a GPS Smart Interrupter

overrides cable synchronization.

Operating the Smart Interrupter (GPS version)

Note: Use this method when using the Smart Interrupter with

the SCM.

The GPS Smart Interrupter can be individually synchronized.

The unit will synchronize and stay in synchronization as long

as the antenna is plugged in to the GPS antenna socket

on the Smart Interrupter, has a clear view of the sky, and

is receiving a GPS signal. Synchronization is automatically

updated every 30 minutes.

Note: If the unit has not been used for some time (over 4

weeks) it may take several minutes for the Smart Interrupter

to obtain a GPS signal. This is normal and does not require

any user action.

GPS operation symbols are:

GPS standby-GPS asleep (no action required)

GPS searching

Timer active

Antenna

Fault (ﬂashing symbol)-replace antenna

Position (steady symbol)-move Smart Interrupter to a

better GPS reception area

Signal level

Minimum signal strength / Maximum signal strength

Synchronization being determined

Synchronization to GPS OK last time

No synchronization to GPS last time (“free running”)

Timer Mode

Note: The Smart Interrupter clock is automatically adjusted

every time a GPS signal is received. The clock automatically

adjusts to local time.

You can instruct a GPS Smart Interrupter to activate at a

certain time and de-activate at another.

Press the timer button. The Use Timer screen is

displayed.

Press the left/right arrow buttons to select either Yes or No.

If you select No the unit reverts to the main screen and the

timer will not operate. If you select

Yes the timer screen is displayed.

If there is no GPS signal or the GPS antenna is not

connected, the timer cannot be enabled and the following

screen is displayed.

Press OK to return to the previous screen without setting

the timer.

Setting the timer

Press the timer button and use the left/right arrows to select Yes.

The following screen is displayed:

Press the left/right buttons to change the set time. Press OK

to toggle from start time to stop time. Once the start/stop

times have been set press OK to

display the Local Time Now screen.

Press the left/right arrows to adjust the current time in steps

of 1 hour (this allows for adjustment due to daylight saving,

for example). Press OK. The screen reverts to the previous

mode with the addition of the ﬂashing timer symbol. The run/

stop button is disabled as the

timer now has control.

When the start time is reached the screen shows the unit

running as normal. When the stop time is reached the display

shows stopped.

Smart Interrupter Functional Check

To check the switching function:

Switch off the Smart Interrupter and disconnect it from the

CP supply.

Connect a DMM set to measure the resistance between the

output leads, meter +ve to the Red lead and meter -ve to the

Black lead (if connected backwards the Smart Interrupter

will emit a warning tone and the resistance readings will be

erroneous).

With the unit off, the resistance measured should be greater

than 100kΩ. Switch the Smart Interrupter On and set it to

Stopped.

The resistance measured should now be very much less

than 10Ω.

Switch the Smart Interrupter Off and disconnect the meter.

Note: If the unit is set to Running, the resistance value will

ﬂuctuate between these readings as the switch turns On and

Off. If either resistance measurement is outside the limits

stated above, the unit should be returned to Radiodetection

for service.

Smart Interrupter Maintenance

The Smart Interrupter is powered by 2 x LR20 (D-cell) batteries.

Battery level indication.

When the battery level is full the battery symbol remains black.

When the battery level becomes low the battery icon shows

a single bar. When there is no bar replace the batteries. The

battery compartment can be accessed by removing the battery

cover, as shown in the diagram.

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