NOVA AND NOVA PRO
Maintenance
6
Maintenance
6.1.
Replacing fuses
There are three fuses under back battery cover of the NOVA instrument.
❑
F3
M 0.315 A / 250 V, 20
5 mm
This fuse protects internal circuitry of low-value resistance function if test probes are connected
to the mains supply voltage by mistake.
❑
F1, F2
F 4 A / 500 V, 32
6.3 mm
General input protection fuses for the L/L1 and N/L2 test terminals.
Warnings:
❑
Disconnect any measuring accessory from the instrument and ensure that the
instrument is turned off before opening the battery/fuse compartment cover, hazardous
voltage can exist inside this compartment!
❑
Replace any blown fuses with exactly the same type of fuse. The instrument can be
damaged and/or operator’s safety impaired if this is not performed!
The Position of fuses can be seen in figure 3.4 in chapter 3.3 Back panel.
6.2.
Cleaning
No special maintenance is required for the housing. To clean the surface of the instrument
use a soft cloth slightly moistened with soapy water or alcohol. Then leave the instrument to
dry totally before use.
Warnings:
❑
Do not use liquids based on petrol or hydrocarbons!
❑
Do not spill cleaning liquid over the instrument!
6.3.
Periodic calibration
It is essential that the test instrument is regularly calibrated in order for the technical
specification listed in this manual to be guaranteed. We recommend an annual calibration.
The calibration should be done by an authorized technical person only. Please contact your
dealer for further information.
6.4.
Service
For repairs under warranty, or at any other time, please contact your distributor. Unauthorized
person(s) are not allowed to open the NOVA instrument. There are no user replaceable
components inside the instrument, except for the three fuses inside the battery compartment,
refer to chapter
6.1 Replacing fuses
.
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