26
GOSSEN-METRAWATT
Also some segments are shown which are not used on
this tester. Pressing of the pushbuttons „RANGE
↑
“ (3)
and/or „RANGE
↓
“ (4) lets you switch to test patterns
which, however, are provided for test and service pur-
poses only.
í
Turn the rotary switch (6) to any other position. This sets
the tester back to normal condition.
10.3 Batteries
At regular, short intervals check that the batteries of your
tester do not leak. With leaking batteries, completely
remove the battery electrolyte and install new batteries.
If „U LO“ is shown on the LCD display while making a bat-
tery test according to section 3.2, the batteries must be
replaced with new ones. Do this as described in
section 3.1. The tester operates on 6 each 1.5 V
mono-cells to IEC R20 (zinc-carbon) or IEC LR20 (alka-
line-manganese).
Always replace the complete battery set!
10.4 Fuse
The insulation tester is fitted with a fuse type FA 0,315 A /
1000 V which protects the low-ohmic measuring range
against overload. When a fuse blows, the word „FUSE“ is
shown on the LCD display (5) in place of the digital display
(see section 10.1). In this case, only voltage measurements
(with R
i
= 5 M
Ω
) can still be performed.
The fuse is located in a holder in the bottom of the case.
Replace it as follows:
í
Completely disconnect the tester from all external cir-
cuits.
í
Undo the two slotted screws at the bottom of the tester
using an adequate tool and remove the cover of the bat-
tery compartment.
í
With an adequate tool, unscrew the cap of the fuse holder.
í
Remove the fuse and replace it with a new one. A spare
fuse is located in a holder immediately next to it.
Attention!
!
Absolutely verify that only the specified fuse, type
FA 0,315A / 1000 V is installed. If a fuse of other
cutout capacity, other nominal current or other
switching capacity is used, there is danger of
damaging components!
í
Replace the fuse cap together with the new fuse.
í
Replace the cover of the battery compartment and
tighten it.