5. Maintenance ............................................................................................................................................................ 32
5-1. Daily check .................................................................................................................................................. 32
5-1-1. Cleaning the measuring cell ............................................................................................................. 32
5-2. Other maintenance ....................................................................................................................................... 33
5-2-1. Replacement of the power fuse ........................................................................................................ 33
5-2-2. Adjustment of Injection Adapter (and tightening of tube nozzles) .................................................. 33
5-2-3. Replacement of optional peristaltic pump tubing ............................................................................. 35
6. Troubleshooting ....................................................................................................................................................... 37
6-1. Error messages and remedies ....................................................................................................................... 37
6-2. Symptoms for error numbers and associated remedies ................................................................................ 37
6-3. Troubleshooting ........................................................................................................................................... 38
6-3-1. Cannot turn on the main unit with the power switch ........................................................................ 38
6-3-2. “Ready to Test” message does not appear and/or cell temperature is unstable. ............................... 39
6-3-3. The unit does not work even though power is on. ............................................................................ 39
6-3-4. LCD does not function ..................................................................................................................... 39
6-3-5. Key entry does not work .................................................................................................................. 40
6-3-6. Air bubbles are easily trapped in the sample and visible in the measurement cell ........................... 40
6-3-7. There is poor repeatability on measured values ............................................................................... 41
6-3-8. Sampling time is too long (optional peristaltic pump) ..................................................................... 42
6-3-9. Measuring time is too long ............................................................................................................... 43
6-3-10. Data cannot be stored in the memory ............................................................................................. 43
7. Others ...................................................................................................................................................................... 44
7-1. Basic specifications ...................................................................................................................................... 44
7-2. Principle of measurement ............................................................................................................................ 45
7-2-1. Oscillating U-tube Cell .................................................................................................................... 45
7-2-2. Density Tables .................................................................................................................................. 46
7-3. Warranty/Return Information ...................................................................................................................... 48
CANNON
®
D155 Density Meter Instruction & Operation Manual
Version 1.1b – August 2014; CANNON
Instrument Company
2139 High Tech Road • State College, PA • 16803 • USA
