
GOSSEN Mueller & Weigert 7
Interchangeable Scales
Scale replacement is quick and simple with no loss of
accuracy and without tools.
The permanently affixed closure flap at the top, or at the
left side of the housing (for 144 x 144 mm panel meters
only) need only be opened, and the scale can then be
pulled out and removed.
Terminal Connections
M4 screw terminals with self-lifting terminal clips simplify
clamping of connector wires. Terminal screws can be
turned with cross-head or with standard screw drivers.
Except for ammeters with direct connection:
Moving-coil ammeters ≥6 A and 40 A/60 A moving-iron
ammeters include M6 bolt terminals, and 100 A
moving-iron ammeters have M8 bolt terminals.
Housings
The rugged polycarbonate housing is self-extinguishing
and drip-proof per UL94V-0.
Glass faceplate material: silicate glass
Bezels and glass faceplates can be easily replaced.
All panel meters are optionally available with a sheet metal
housing, except for power meters and meters with front
panel dimensions of 48 x 48 mm and 144 x 144 mm.
Several instruments can me mounted side by side without
spacers for space saving installation. (The “polycarbonate
housing with 2 leaf springs” option is required for meters
with front dimensions of 48 x 48 mm).
The housing configuration, as well as a special housing for
panel meters with front panel dimensions of 48 x 48 mm
(available as an option), allow for installation into the
various grid systems.
Mounting
All mounting fasteners are resistant to excessive vibration
and shock (order no. LN56).
The S type screw clamp supplied as standard equipment
can be used with polycarbonate and sheet metal housings
with a control panel thickness of ≤25 mm, and the screw
spindle (with 144 x 144 mm panel meters only)
for control panel thicknesses of ≤ 40 mm.
The following are available as options:
• Sheet metal housing with screw clamp per
B DIN 43835 for control panel thicknesses of ≤40 mm
(except for power meters and panel meters with front
panel dimensions of 48 x 48 mm).
• Polycarbonate housing with front dimensions of
48 x 48 mm for manual grid mount, no fasteners.
• Polycarbonate housing with 2 leaf springs for
standard stress requirements, also suitable for H&B
Unibloc and manual grid mount for panel meters with
front panel dimensions of 72 x 72 mm and
96 x 96 mm (except for power meters and meters
with front panel dimensions of 144 x 144 mm).
• Polycarbonate housing with front panel dimensions of
48 x 48 mm for H&B Unibloc grid with 2 leaf springs
(Bronce springs).
• Polycarbonate housing with 4 leaf springs for
heightened stress requirements
(except for power meters and meters with front panel
dimensions of 144 x 144 mm).
Advantages of leaf spring mounting:
–Time saving, front mounting into DIN control panel
cutout for control panel thicknesses of ≥1 mm
–Front mounting into grid systems (see above)
• Polycarbonate housing with Subklew fastener (screw
clamp similar to type “S” with cup point) for Subklew
grid (except for meters with front panel dimensions of
144 x 144 mm).
Safety Precautions
➲ Instruments with damaged bezels or glass faceplates
must be disconnected from the mains.
➲ Adequate safety clearance must be maintained to
control panel fasteners and to sheet metal housings if
non-isolated (stripped) connector wires are used.
➲ The terminal block cover must be snapped into place
after the connector wires have been clamped in order
to assure back of hand and finger contact safety in
accordance with VBG4.
➲ Scales may only be replaced under voltage-free
conditions.
➲ Bezels and glass faceplates may only be replaced
under voltage-free conditions.
Standard Program
Technical Description
Technical Description
Square Panel Meters
Square panel meters per DIN 43700 with
quadrant scale, dull black or dull gray (RAL 7037) bezel per DIN 43718.
Available Models:
Front Dimensions 48 x 48 72 x 72 96 x 96 144 x 144
see page
Moving-coil panel meters for DC 10 10 10 10
Moving-coil panel meters for AC 12 12 12 12
Moving-iron panel meters 14 14 14 14
Bimetal ammeters 16 16 16 −
Moving-iron bimetal ammeters − 18 18 −
Pointer-type frequency meters − 20 20 20
Power meters −−22 22
Power factor meters −−26 26
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