Maintenance And Troubleshooting; Maintenance - Toshiba LF620 Instruction Manual

13. Maintenance and Troubleshooting

Do not conduct wiring work when
power is applied.
DON'T

13.1 Maintenance

Calibration
The converter for electromagnetic flowmeter: LF62* 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, "Calibration"
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.
CAUTION
Wiring while power is
applied can cause electric
shock.
Glass tube fuse 1 piece
・1A, 250 V for 100 to 240 VAC and 110VDC power supply
・2A, 250V for 24VDC power supply
Diameter 5.2 mm × 20 mm
・Time Lag Fuses for 100 to 240VAC or 110VDC
・Normal blow type for 24 VDC
Do not touch the LF620 main body
when high temperature fluid is being
measured.
The fluid raises the main
body temperature and can
cause burns.
DON'T
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