INT1 Technical FAQ

No. The INT1 must be connected to an RMU1 with an interface cable to operate properly. The RMU1 that the INT1 is connected to must be fourth generation (G4) or newer and it must be an RMU1-I or RMU1-G. The RMU1 needs to be enabled for use with the INT1 to report into CorView. The fourth generation RMU1-I and RMU1-G have a small 4 pin connector on the bottom left corner of the unit.

The INT1 needs to be connected to the fourth generation (G4) RMU1 and it must be an RMU1-I or RMU1-G. The fourth generation RMU1-I and RMU1-G have a small 4 pin connector on the bottom left corner of the unit. Older generations of the RMU1s (G1, G2, G3) are not compatible with the INT1. The RMU1 must also be enabled for the use with the INT1.

Yes, you can! There are few things you must ensure when you add the INT1 to an RMU1.

1. The RMU1 that is going to be used with the INT1 is fourth generation or newer and is an RMU1-I or RMU1-G. There is a small 4 pin connector next to the green connector.
2. The RMU1 that is going to be used with the INT1 needs to be enabled for use with the INT1. This can be done at the time of purchase or by calling or emailing Mobiltex Service.
3. Ensure you have the INT1 to RMU1 interface cable. (Mobiltex P/N W1640034801)
4. Replace the RMU1 batteries when you add the INT1. (4 AA Energizer L91 Lithium batteries)

Typically, 5 years based on readings every 12 hours and 2 weeks of interruption per year.

Yes, you can set an interruption schedule locally with the RMU programmer. It requires GPS time lock to start interruption which may take up 12.5min to acquire. (See also Q. How do I get the INT1 to interrupt locally?)

Yes, you can but messages can take up to 12 hours to propagate. The RMU1 G4 will only check for commands every 12 hours, so an interruption schedule should be sent at least a day in advance.

Yes. The INT1 will only make an Instant Disconnect DC Potential measurement on P/S1. You need to program it as measurement type BOND 45 to get an instant disconnect DC potential on P/S1. Ensure the current doesn’t exceed +/-10ADC, 7AAC.

It can be either open or closed. The internal relay of the INT1 is a latching relay and will latch to the last state before the microprocessor turns off.

You cannot merge the data. They are treated as two separate sites. The ESN with -0 at the end is for the INT1, and non -0 ESN is for the RMU1. You can name the corView sites with “- INT1” or “- RMU1” at the end to differentiate them.

It can measure up to +/-10ADC, 7AAC in the High Range.

No. The INT1 doesn’t require an external shunt as it has an internal shunt to measure bond current. Ensure the current doesn’t exceed +/-10ADC, 7AAC.

It is 0.02 Ohms.

The INT1 will accept 12 – 22 AWG wires.

Only if you are adding P/S measurements with the INT1.

No. You only need to connect the INT1 and the RMU1 with the black interface cable. You can also disable unused measurement slots in the RMU1 using the RMU1 Configuration editor.

No. The INT utilizes the RMU1 for transmission of the data. The RMU1 does need an unobstructed view of the sky.

Measurement points are not interconnected through black interface cable and are separate between the RMU1 and INT1. For example, P/S1 measurement from the INT1 does not show up as P/S1 on the RMU1. The RMU1 adds extra channels on top of what the INT1 is measuring.

Yes. The measurements from the INT1 will report into a CorView site separate from the RMU1 CorView site. The INT1 can be identified in CorView as the ESN will end with -0. The RMU1 can take other measurements (e.g., CP33-Single Coupon) in addition to what the INT1 is measuring.

The INT1 can take up to 2 P/S measurements, but only P/S1 on the INT1 will have instant disconnect readings with the measurement type BOND45.

You must connect the RMU1 and the INT1 with the black 4 pin interface cable. You don’t have to duplicate the measurement wires on the RMU1 from the INT1. The RMU1 and INT operate as independent measurement points. For example, if you are just measuring a bond current with the INT1, you only need to connect the measurement wires to the INT1. The readings will only appear in the data slot for the INT1 and not for the RMU1.

Yes. The RMU1+INT1 NEMA4 enclosure has the part number: A03700RMU12.

You can just put a loop between the terminals. Loop Pipe1 to Bond+ and loop Pipe2 to Bond- as shown below. Note that the bond currents will introduce a bit of error with this setup. For more precise measurements, test wires should be brought up from the structure in addition to the bond wires.

Mounting holes are located at 4 corners of the INT1. Dimensions in the drawings are in inches.

No. It is a part of the RMU1 configuration editor. Ensure the RMU1 configuration editor is up to date. Select the INT1 tab in the configuration editor to configure the INT1. (See also Q. I don’t see the INT1 tab in the RMU1 Configuration Editor.)

No. It is a part of the RMU1 configuration editor. Ensure the RMU1 configuration editor is up to date. Select the INT1 tab in the configuration editor to configure the INT1. (See also Q. I don’t see the INT1 tab in the RMU1 Configuration Editor.)

Ensure the RMU1 configuration editor is up to date. Older versions are not compatible with the INT1.

For PC:

Ensure the RMU1 configuration editor is up to date. The INT1 tab can be found near the top left area of the RMU1 Configuration editor window.

For mobile devices:

1. Go to Menu > [Application Setting].

2. Enable “Show SubRMUs (INT1)”.

3. Go to Menu > [Configuration] > [Measurements].

4. Hit “RMU1”.

5. Select “INT1”.

The INT1 firmware is updated the same way you update the RMU1 firmware using an RMU1 programmer. Ensure the INT1 is connected to the RMU1 with the interface cable.

For PC

From the windows start menu, find the program named “INT1 Firmware Update v1.xx”. Run the firmware program and follow the prompts.

For mobile devices

After connecting to an RMU1 with a programmer, the RMU1 configuration app will prompt you to update the firmware if there is a newer version is detected. Ensure your mobile device is configured to allow apps to automatically update.

Yes, you can. The RMU1 requires an external shunt to measure bond current whereas the INT1 has an internal shunt. You must ensure the bond current is below +/-10ADC, 7AAC for the INT1.

The default INT1 setting is Off-First. You can change the interruption order using the RMU1 Configuration Editor. Under [Interruption Settings] there is an option to enable On-First. Be sure to press Write To RMU to save configuration changes.

Interruption will work for both BOND44 and BOND 45. BOND45 includes instant off readings for P/S1.

You can set an interruption schedule from the RMU1 Configuration Editor using the RMU1 programmer. Ensure the INT1 is connected to the RMU1 with the interface cable when you program interruption schedule.

For PC

1. Open the latest version of the RMU1 Configuration Editor. Click on the INT1 tab near the top left.
2. Click [Read Config From RMU1] near the bottom right area.
3. Click [Interruption Settings] near the bottom left.
4. Enter the interruption cycle parameter in milliseconds (ms).
5. Set the interruption cycle order. (Off-First or On-First)
6. Click [OK] in the Interruption Settings window.
7. Click [interruption Schedule] near the bottom left.
8. Select a start date.
9. Select a start time in 24-hour format, local time.
10. Enter duration in minutes. (e.g., 720min for 12hrs)
11. Enter the number of days to repeat.
12. Click [OK] in the Interruption Schedule window.
13. Select Interruption Method. You must set it individually for the INT1 and the RMU1.
14. Click [Write Config to RMU1] at the bottom right corner.

Note: Wait for the unit to receive GPS time lock to start interruption. This could take up to 12.5 min after the unit reboots.

For mobile device

1. Open the RMU1 Configuration App. Ensure it is up to date.
2. Tap [CONNECT TO RMU1] in the Bluetooth Connection page. Enter the pairing code as necessary (Default is 123456).
3. Go to [Application Settings] page from the menu.
4. Enable [Show SubRMUs (INT1)].
5. Go to the [Configuration] page from the main menu.
6. Select [Interruption Settings].
7. Enter interruption cycle parameters in ms.
8. Set the interruption cycle order. (Off-First or On-First)
9. Select the start date.
10. Select the start time in 24-hour format, local time.
11. Enter the duration in minutes. (e.g., 720min for 12hrs)
12. Enter the number of days to repeat.
13. Go to Measurements page.
14. Select the Interruption Method. You must set it individually for the INT1 and the RMU1.
15. Go back to the top of Configuration page.
16. Hit [WRITE TO RMU1] at the top of the page to save your settings.

Note: GPS time lock is required for interruption to start. This could take up to 12.5 min after the unit reboots.

Android:

Apple iOS

There are few possible causes for the INT1 to not interrupt:

• Ensure the INT1 is connected to the appropriate RMU1 with the interface cable.
• Ensure the unit has acquired GPS Time Lock. It could take up to 12.5 min to get GPS Time Lock.
• Ensure the interruption schedule is set. Time entry is in 24-hour format, e.g., 2:00PM should be entered 14:00.
• If you are sending an interruption command from CorView, it could take up to 12 hours for the unit to receive the command. The RMU1 G4 will check for commands only every 12 hours. Interruption should be scheduled at least a day in advance when using corView.
• Ensure the schedule is set correctly for the selected time zone.

There are few possible causes for the INT1 to read incorrect current on the bond:

• Ensure the BOND+ and BOND- terminals are not connected in parallel to an external shunt. The INT1 has an internal shunt for bond current measurement, and it should be in series with the external shunt if any.
• Ensure that the scaling factor is set to 1 for the bond current measurement slots in the RMU1 Configuration Editor.
• Ensure the range is selected correctly in the RMU1 Configuration Editor.

Commands should be sent through the RMU1 that is attached to the INT1. Look for the same ESN as the INT1 but doesn’t contain “-0” in CorView.

To send another command to the INT1 in CorView, the existing command needs to finish being processed first. You may have to wait up to 12 hours for the first command sent to the INT1/RMU1 to be processed. Then you will be able to send the next command.

The INT1 is designed to go to sleep 30 minutes after being disconnected from the RMU1. To shut down the INT1 after disconnecting it from the RMU1, hold a magnet just above the wiring label for 10 seconds until the LCD goes out.