Here are a few tips if you’re having problems with your Watchman Sonic.
From time to time the signal of the Watchman Sonic can cut out. For example, this can happen in a power cut when the tank has been topped up or due to bad weather. This is indicated by an exclamation triangle with no bars displayed. First of all, it’s best not to panic as this can simply be down to the receiver plug losing connection to the gauge or alarm unit on the tank. The gauge will attempt to reconnect automatically.
If the gauge does not reconnect automatically then follow these troubleshooting steps.
There are a few simple steps to re-calibrate the gauge, if it stops reading the oil level of your oil tank.
If an incorrect level is being shown on your oil monitor then it’s worth checking that you have measured the height of your sensor against the tank correctly. 3 metres is the maximum height for the sensor from the base of the tank. Make sure that you are only measuring the internal depth of the tank. Do not include the outer skin of bunded tanks in your measurement and take the measurement from no lower than the maximum fill level of your tank.
Check first whether your Watchman Sonic Unit is in warranty or not. Opening a Watchman will void the warranty if it is still in effect. The battery on the Watchman Sonic lasts for approximately up to 5 years. To replace it, follow these instructions:
Most online retailers will stock them. Usually, they can be bought fairly cheaply from Amazon.
The warranty period on a watchman oil level monitor is 12 months. In order to find out if your unit is still under warranty look on the back of the receiver for a 6 digit number. This can be found underneath the Part No. “A45-2817” is an example of what this might look like. The last 4 digits depict the month and year that it was issued. If the current date is within 12 months of that printed on your receiver then you should contact email@example.com or call 028 3836 4415. Otherwise, we will be happy to help!
Replace the battery as detailed above. The Varta CR2430 is the standard coin battery for these gauges.
This means that the plug-in receiver can’t receive a signal from the transmitter on the tank. This can clear up by itself after a couple of hours and tends to show when the receiver hasn’t got a signal for a while.
If the problem persists, pairing the receiver and the transmitter (green or red disc) on the tank may resolve the issue. This process is detailed above.
This means that the green or red Watchman disc is having trouble receiving the radar echo from the bottom of the tank.
The Watchman Sonic works by firing a beam of radiowaves down into the tank. These waves then bounce off the oil, the watchman measures the time it takes to receive the “echo” back which it uses to calculate the oil level.
If there any objects or debris in the way of the beam then this error may occur.
If neither of these steps clears the error after refitting the disc and waiting for the gauge to send a new signal, it is possible that the gauge has been installed incorrectly.
This could mean that the gauge has been installed at an angle and not pointing straight down into the tank causing the beam to bounce around the tank and not be received correctly.
Alternatively the gauge has been installed in a location where there is a ‘window’ in the inner tank. This window would block the beam before it reaches the oil.
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