Maintenance - Toshiba LF516 Instruction Manual

13.1 Maintenance

Calibration
The converter for electromagnetic flowmeter: LF61*F has a built-in internal calibration circuit that can be used
to check the zero and span of the converter for the purpose of instrumentation maintenance,
periodic inspection or re-verification of instrument calibration parameters. See Chapter 9,
"Mag-Prover's built-in Signal Source"
Fuse
The fuse can be taken out by unscrewing the cap of the fuse holder. Check that the fuse is not
damaged. The fuse has to be replaced periodically. The recommended replacement period is 3 years.
Type of fuse used:
Rating:
Dimensions:
Melting time characteristic:
Note: Use a fuse that complies with the Electrical Appliance and Material Safety Law.
Check/Replacement of the display unit
When characters displayed on the LCD display become thin or blots come out, please adjust the setting of
LCD's display density. If the display is still not improved, the display unit comes to the end of its life.
Please replace the display unit with a new one. In order to use the display unit stably for a long time, it is
preferable to replace it early. For inspection and replacement, please contact your nearest Toshiba
representative.
Power supply unit (also used for excitation board)
Electronic components deteriorate faster when the ambient temperature is high. The life of the power
supply unit in the converter is 9 to 10 years if the ambient temperature is 40°C, and 5 to 6 years if it
is 50° C. To extend the life of the flowmeter, we recommend you replace the power supply unit early.
Contact your nearest Toshiba representative for a flowmeter inspection or unit replacement.
Product disposal
The main body or parts of the electromagnetic flowmeter LF516/LF546 must be disposed of, according to the
rules and regulations of your local government.
Especially if you dispose of electrolytic capacitors to replace parts, have it done by an agency which
is licensed to handle industry waste materials.
Operative life
The operative life of this flowmeter is 10 years from the date of shipment.
The life of the flowmeter differs depending on the environmental conditions and the way it was used. To
extend the life of the flowmeter, inspect the flowmeter periodically and clean or replace components if
necessary.
Glass tube fuse 1 piece
・0.8A, 250 V for 100 to 240 VAC
Diameter 5.2 mm × 20 mm
・Time Lag Fuses for 100 to 240VAC
− 139 −
6 F 8 A 0 9 3 4