Metrohm E1620, Инструкция по эксплуатации

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(vi) Testing and maintenance of switchboard/ sub–
station equipment on such items as fuses,
joints, contacts and bonds.
5.5 Customer Test Leads
The Kelvin crocodile clips supplied with the instrument are
suitable for connecting to conductors up to 15mm in diameter
or bus bars 15mm thick. There will be, however, instances where
the item being tested requires larger jaws, and the user is advised
to make up his own leads. Furthermore, there will be occasions
when longer leads are required due to the geometry of the item
being tested. The following guidance notes should assist in the
assembly of such leads:
Potential Leads
1. Shrouded, 4mm, safety plugs are
required at one end of each lead for
connection to the E1620 measuring
sockets.
2. Insulated, 16/0.2mm, tinned copper
wire is recommended.
3. The two potential leads should be the
same length to minimise inaccuracies
due to unbalance.
4. For practical reasons, the lead length
should be as short as possible to
minimise pick up.
Fig. 3
(9) If the ‘BAT’ symbol appears on the LCD during these
checks, as shown in Fig. 3, the batteries require to be
replaced or recharged. Follow the instructions for
replacing batteries outlined in the proceeding section.
5.2 Precautions
(1) Always ensure that the circuit to be measured is
switched off, isolated and completely de–energised
before connecting the test leads.
(2) If it is probable that the instrument’s protection has been
impaired due to electrical, mechanical or environmental
damage, it must not be used. It should be returned to
the manufacturer or his appointed
agent for checking and repair.
(3) To prevent damage to the liquid crystal display, the
minimum storage temperature of -20ºC must be
observed. It should also be noted that below 0ºC the
operation of this display will be sluggish.
(4) If the exterior of the instrument requires cleaning, it
should be done with a sponge and a mild solution of
Fig. 3
(9) If the ‘BAT’ symbol appears on the LCD during these
checks, as shown in Fig. 3, the batteries require to be
replaced or recharged. Follow the instructions for
replacing batteries outlined in the proceeding section.
5.2 Precautions
(1) Always ensure that the circuit to be measured is
switched off, isolated and completely de–energised
before connecting the test leads.
(2) If it is probable that the instrument’s protection has been
impaired due to electrical, mechanical or environmental
damage, it must not be used. It should be returned to
the manufacturer or his appointed
agent for checking and repair.
(3) To prevent damage to the liquid crystal display, the
minimum storage temperature of -20ºC must be
observed. It should also be noted that below 0ºC the
operation of this display will be sluggish.
(4) If the exterior of the instrument requires cleaning, it
should be done with a sponge and a mild solution of
(vi) Testing and maintenance of switchboard/ sub–
station equipment on such items as fuses,
joints, contacts and bonds.
5.5 Customer Test Leads
The Kelvin crocodile clips supplied with the instrument are
suitable for connecting to conductors up to 15mm in diameter
or bus bars 15mm thick. There will be, however, instances where
the item being tested requires larger jaws, and the user is advised
to make up his own leads. Furthermore, there will be occasions
when longer leads are required due to the geometry of the item
being tested. The following guidance notes should assist in the
assembly of such leads:
Potential Leads
1. Shrouded, 4mm, safety plugs are
required at one end of each lead for
connection to the E1620 measuring
sockets.
2. Insulated, 16/0.2mm, tinned copper
wire is recommended.
3. The two potential leads should be the
same length to minimise inaccuracies
due to unbalance.
4. For practical reasons, the lead length
should be as short as possible to
minimise pick up.
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