ECM BB100, Инструкция по эксплуатации, Страница: 25 / 37

Maintenance and Troubleshooting
The Sight Glass and Cleaning the BB100
When liquid begins to fill the sight glass, one 1/8” NPT plug should be removed from each
tank and the meter be orientated so that the liquid in each tank can drain out. Occasionally,
the BB100 should be disassembled for inspection and cleaning. Intervals between cleanings
depend on the engines being tested and the plumbing from the engine to the meter. To
determine the proper cleaning interval, the meter should be operated for 100 hours and then
have its outer tanks (2) and inner tanks (2) removed from the main body of the meter. Two
screws are used to hold each tank on (8 screws total). The tanks pull off the body. The outer
tanks may require a little tug to overcome the friction caused by the sealing O-rings. Do not
disassemble the BB100 any more than this.
When the tanks are off, look down the flow tube going through the body of the meter. The
path should be clear except for a bar crossing the tube in the middle of its length and two
domed objects coming from each side of the tube in the middle of the meter. The bar is the
vortex generator (ie. flow target) and the domed objects are the ultrasonic receiver and
transmitter. If there is solid material in the tube and near the vortex generator, receiver, or
transmitter, it should be removed. To do this, a pipe cleaner or gun barrel brush (with plastic
bristles) and acetone are recommended. Do not run the end of the brush into the flow target
or it may be damaged and the calibration of the meter may be affected.
Due to the caustic nature of engine blow-by, some of the anodizing black dye may be
removed from the meter. This will not cause a problem since it is just the dye that is
removed; the anodizing remains on the meter.
Calibrating the BB100
The BB100 can be field-calibrated using the program BBREMOTE and a calibration file.
The calibration file for the supplied meter is called ####.BB (where #### is the serial
number) and is on the same floppy disk as BBREMOTE.
The calibration file is a 52 row ascii file. The first row is the date in format MM/DD/YYYY;
where MM is the month (ex. 01 for January), DD is the day, and YYYY is the year. The
subsequent 51 rows contain the flow in LPM for a vortex frequency 0 to 10,000 Hz in
intervals of 200 Hz. BBREMOTE allows calibration files to be uploaded from the meter,
downloaded to the meter, and generated from new data.
To perform a calibration:
1.
Connect the BB100 to the flow calibration apparatus.
2.
Connect the BB100 to a PC and start the program BBREMOTE.
3.
Activate the option “REAL-TIME CALIBRATION DISPLAY ON” to display the
meter’s frequency at various flows.
Maintenance and Troubleshooting 21