dynasonics TFXL Troubleshooting Manual

Trouble Shooting Steps Trouble Shooting Steps
Trouble Shooting Steps Trouble Shooting Steps
Display is not on Display is not on Display is not on Display is not on
Open the enclosure cover and verify that the indicator light [D2] (located just left of the computer plug in) is illumi-
nated. If it is not, one of the following is the cause:
1. 11-30 Vdc is not present on the power input terminals—measure the voltage on the bottom two screws on the wiring
terminals. The TFXL consumes 250 mA of current during operation.
2. The fuse F1 (small part located just to the right of the wiring terminals) is open—measure continuity across F1
(surface mount part). It would be very difficult to replace this fuse in the field. It is recommended that a unit with a
open fuse be returned to the factory for evaluation.
3. The flow meter's power regulators are damaged (return to factory)
ERROR 0010 on the display ERROR 0010 on the display ERROR 0010 on the display ERROR 0010 on the display
This is the "low signal strength" error code, which typically means that the pipe is empty or gas locked—this code is nor-
mal and does not indicate a problem with the flow meter. This error occurs when measured signal strength is below
the "Low Signal Cutoff" established in UltraLink.
If the pipe is empty:
• This error will clear by itself when the pipe fills with water
If the pipe is full of water:
• Verify that grease has been placed between the gray block and the pipe. Replace grease.
• Does the gray block fit properly on the pipe? These blocks are supposed to fit snuggly. No additional filler material
between the block and pipe should be present or is required.
• If the meter is mounted on a horizontal pipe, verify that the meter is not mounted with the white box right on top of
the pipe—there can be a gas pocket present. Mount the meter on the side of the pipe.
• Verify that the two black and two red wires are connected to the wiring terminal block TB1 located under the display
circuit board.
• Are there a lot of gas bubbles in the water. Excessive gas content can lead to low signal strength levels. Does signal
strength increase when the throttling valve is closed off?
Meter indicates flow when the pump is off or pipe is empty Meter indicates flow when the pump is off or pipe is empty
Meter indicates flow when the pump is off or pipe is empty Meter indicates flow when the pump is off or pipe is empty
When pump is off the pipe goes empty:
• The meter will read negative flow if the water in the pipe is flowing backwards—many times indicating that the check
valve is defective and leaking. Once the pipe goes empty, the meter should display ERROR 0010.
• Adjust the Signal Strength Cutoff to a value 5% higher than the measured Signal Strength with a empty pipe. Verify
that the measured Signal Strength is greater than the Signal Strength Cutoff when the pipe is full of water.
When the pump is off the pipe stays full of water:
• Verify that the Low Flow Cutoff is set to at least 3%.
• Perform a Zero Flow Calibration.
1. Shut off valves ensuring that flow is completely stopped.
2. Press Calibration button in UltraLink— Goto Zero Flow screen (Screen 2).
3. Press Set button, Press Next button, Press Finish button.
When pump is off the pipe stays partially filled:
• The meter will likely act erratic and the piping should be changed. It is best to operate the TFXL on pipes that are
positioned to be either entirely full or entirely empty.
Component Locations Component Locations
Component Locations Component Locations
TFXL Ultrasonic Water Meter Trouble Shooting Guide TFXL Ultrasonic Water Meter Trouble Shooting Guide TFXL Ultrasonic Water Meter Trouble Shooting Guide TFXL Ultrasonic Water Meter Trouble Shooting Guide
Indicator Light D2: Always ON
Indicator Light D11: Flashes
Selector Switch SW1
Fuse F1
Transducer Terminals TB1