Maretron TLM150 ユーザーズマニュアル

If you notice unexpected operation of the Maretron TLM150, follow the troubleshooting 
procedures in this section to remedy simple problems. 
 

No tank level 
output 

1.  If operating in the NMEA 2000

 Mode, check the connection to the 

NMEA 2000

®

 interface (see Section 2.5.1) and tighten if necessary. 

2.  Ensure that power is supplied to the NMEA 2000

®

 network. Proper 

network power can be checked by measuring the voltage at an open 
tee between NET-S and NET-C. The voltage should be between 9 and 
16 volts.  

3.  Ensure that both trunk line terminators are in place. Proper network 

termination can be checked by removing network power and 
measuring the resistance at an open tee between NET-L and NET-H 
signals. The resistance should read approximately 60 ohms (two 120 
ohm terminators in parallel equals 60 ohms). 

4.  Remove the TLM150 sensor component from the tank opening and 

ensure that the surface of the ultrasonic sensor is not fouled. 

Inaccurate tank 
level output 

1.  If operating with a rectangular tank, ensure that the tank depth is 

programmed properly (see Section 3.3.1). 

2.  If using custom calibration, re-calibrate the TLM150 (see Section 

3.3.2). 

3.  Ensure that the tank contains gasoline. Gasoline vapors must be 

present in the tank in order for depth readings to be accurate. If you 
have another fluid type, please use the Maretron TLM100 or TLM200 
tank level monitors.