WatchdogCP RMUvi Features

Remote Rectifier Monitor

NTG's Simplest and Most Cost Effective Rectifier Monitor
The NTG RMUvi remote monitor is a compact, easily installed cathodic protection rectifier monitor that provides reliable:

Readings of Rectifier volts and amps output
Alarms when volts or amps drop below or go above programmable alarm limits
Indication of power loss or power restoration to rectifier

WatchdogCP RMUvi Benefits

Eliminate travel to sites to perform rectifier readings
Better access and more data allows improved management of pipeline integrity
Maintain a reliable history of rectifier data
Expandable to monitor other pipeline assets and processes (valve position, pressure, flow, etc.)
Low monthly messaging costs

Reliable Operation in a Harsh Environment
Packaged in a rugged ABS enclosure, the RMUvi is designed to handle the harsh pipeline field environment. Its measurement circuits are relay isolated from the rectifier, structure, and ground bed, except when briefly connecting in order to take a reading. This dramatically reduces its vulnerability to lightning damage.

When properly installed, it is impervious to precipitation and harsh weather. Small, sealed, and unobtrusive, the RMUvi quietly does its job for years, with no maintenance required. The digital cellular antenna is built right into the unit.

Data is available around the clock from NTG's secure Pipeline Watchdog secure website. After securely logging in, a user can see, at a glance, the reading history and status of all NTG RMUs within their group. Reports can be run immediately or scheduled for monthly email delivery. They are easily imported into all popular CPDM software, including Bass-Trigon, or they can be printed for filing.

RMUvi Technical Specifications *

Physical:

10" high x 5" diameter (25 cm X 13 cm)

Mounting:

3" (8 cm) Test Station Riser or optional Right Angle Bracket

Operating Environment:

Temperature: -22° to + 158° F (-30° to + 70° C)
Humidity: 0 - 95%, non-condensing

Power requirement:

8 - 40 Vdc or 6 - 30 Vac (recommend powering from rectifier secondary transformer taps)

Internal backup battery:

NiCad battery - internally recharged. 10 hour operation after power loss.

Measurement Inputs:

Channel 1 - rectifier volts: 0 - 100 Vdc +/- 0.5% Input impedance: > 1 MOhm
Channel 2 - rectifier amps: 0 - 100 mV +/- 0.5% Input impedance: > 20kOhm

Digital Input:

Dry relay contact closure (switches when resistance goes below 500
Also interfaces to optional AC Voltage Probe (p/n NTG-01-3340-00)

Lightning protection:

Relay isolated from structure to 1500V, except during reads (99.8% of time)
MOV protection on each input circuit

Communications:

GSM Digital cellular using SMS OR Skywave Inmarsat D+ satellite - clear view of sky to SE or SW required

* Specification subject to change without notice

Ordering Information

WatchdogCP RMUvi:

GSM Cellular: NTG-01-3310-GS
Inmarsat D+: NTG-01-3310-ST

Product Model Numbers

NTG-01-3310-GS
Pipeline WatchdogCP 2-Channel RMUvi GSM Cellular

NTG-01-3310-ST
Pipeline WatchdogCP 2-Channel RMUvi Monitor Inmarsat D+ satellite

WatchdogCP RMUvi Features

Automatically report Volts, Amps, and power status
Equipment failure alarms sent by email and/or text message, with automatic return-to-normal reports
Website delivers automated rectifier data reports, in selectable format for easy import into popular CPDM software (Bass-Trigon, ProActive, Paradigm, .XLS, .CSV, .XML, etc.)
All configurable parameters (alarm limits, reporting schedule) are delivered from the website to the RMU 'over-the-air' - no need to travel to site with laptop/PDA
Poll for readings from the NTG Pipeline Watchdog website in real-time.
AC power detection detects presence or absence of AC power to the rectifier
Simple installation with minimum wiring
GSM Cellular or Inmarsat D+ Satellite communication for worldwide deployment
Rugged, reliable operation in harsh environments