Description
The MERLIN CP Hemi Monitor is a compact unit designed to fit invisibly within a CP riser post. It collects Cathodic Protection (CP) data and communicates using the cellular GSM network. MERLIN CP Hemi records pipe-to-soil potentials and current levels, checks that they are within specification and reports immediately if an alarm threshold is exceeded. Alternatively it may simply be that certain measurement points on the pipeline create risks to CP technicians, such as at busy road or rail crossings, or are difficult to access, such as on private land. At these points remote monitoring is very cost-efficient and can improve safety.
Two key features of the Abriox system are:
All data is automatically transmitted in a management report to the system HQ where it is available on-line using Abriox’s MERLIN iCPSM software. ICPSM provides access from any internet-enabled PC to a passwordprotected CP database, unique to each customer.
Users can configure and control MERLIN monitors, view CP data in graphical and numerical formats or export data for further analysis and archiving.
Benefits
Features
GSM (SMS) Communications |
Batteyry Backup |
Test and set up from cell phone using |
5 year life, replaceable battery module. |
User Alerts |
Synchronized Interruption |
Alarms reported immediately (user preset thresholds for all channels). |
Pair of relay contacts, normally closed. Contacts open whilst channel 2 is read. |
Electrical Supply Monitoring |
Custom Reports |
Alarm sent when protection levels inadequate – so that protection can quickly be restored to the pipeline. |
Data automatically archived and presented in custom report formats or exported to other standard applications. |
Daily or Weekly Reports |
Weight |
Weekly report gives min, max and average of all channels for the week |
520g (1.1lb) |
Operational Remperatures |
Lightning Protection |
-40°C to +85°C (-40°F to +185°F). 100% condensing humidity. |
Surge protection on all external inputs and outputs. 2,500A at 3,000V (8/20us). Additional protection using recommended surge arrestors. |
IP Rating |
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Technical Specification
The MERLIN CP Hemi Monitor is a compact, robust, long-life unit that monitors cathodic protection levels at a cylindrical test post. Its key features are:
Physical Dimensions |
10.8” x 3.15” fits invisibly within standard 3.5” riser post |
Weight |
1.1lb |
IP Rating |
IP67 |
Operating Temperature |
-40°F to +185°F 100% condensing humidity |
Lightning Protection |
Surge protection on all external inputs and outputs 2,500A at 3,000V (8/20us) |
Backup Battery |
5-year life, replaceable battery module |
Communications |
Cellular (GSM/SMS) |
Software Management |
iCPSM (web based) or CPSM (PC based) |
Inputs |
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Outputs |
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MERLIN CP Hemi can be deployed at any test point on the pipeline network, such as: mid-points between rectifiers or pipeline terminations (low CP levels), pipeline crossings or corridors (sources of interference from foreign systems), pipelines close to, or parallel with, power lines (sources of AC interference) and rectifier drain points (to check rectifier output levels).
Measurements
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Pipe-to-Soil 1 |
Pipe-to-Soil 2 |
Coupon Current |
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DC | AC | DC | AC | DC | AC |
1 Channel |
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2 Channel |
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3 Channel |
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MERLIN CP monitors use GSM SMS messaging to report data from the field to a central HQ. This method has several advantages:
SMS communication enables MERLIN monitors to be set up in the field using a cellphone.
MERLIN monitors incorporate an internal GSM antenna which, in most locations, will be quite adequate. In weak signal areas, units can be equipped with an external antenna.
The MERLIN system is independent of network provider and Abriox will work with users to secure the most advantageous communication package in their country. We can usually supply our monitors with a GSM airtime package – but we can also factory fit free-issued SIMs or supply monitors for users to fit their own SIMs.