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20 GOSSEN Mueller & Weigert
Moving-Coil Movement with Frequency Converter, 90˚ Scale
Narrow Bezel per DIN 43718
Front Dimensions 48 x 48 mm 72 x 72 mm 96 x 96 mm 144 x 144 mm
Type FM 48 FM 72 FM 96 FM 144
Scale Length 37 mm 63 mm 97 mm 150 mm
Weight (standard model), Max. 0.27 kg 0.20 kg 0.28 kg 0.49 kg
Power Consumption, Approx. 5 mA 5 mA 5 mA 5 mA
Operating Voltage, Max. 300 V 600 V 600 V 600 V
Test Voltage 2.2 kV 3.25 kV 3.25 kV 3.25 kV
Front Housing-Panel Protection IP 52 IP 52 IP 52 IP 52
In preparation
Type FM 96
Square Panel Meters
for Frequency (pointer-type frequency meters)
Technical Data
Description
Analog Panel Meter with Core-Magnet Moving-Coil Movement and
Integrated Frequency Converter or with separate frequency converter
for front panel dimensions 48 x 48 mm
Reference Conditions
Nominal Range of Use Limits
Dimensions
For separate frequency converter (screw and snap mountable, for top-hat rails
DIN EN 50 022-35 x 7.5 or DIN EN 50 022-35 x 15)
L x B x H = 70 x 45 x 114.5
Dimensions
Display
Scale Graduation Coarse-fine
Pointer Bar indicator with knife-edge
Mechanical
Design
Housing Material Polycarbonate, self-extinguishing and drip-proof per UL94V-0
or sheet metal housing as option for front panel dimensions
72 x72 mm and 96 x 96 mm
Mounting Fasteners Standard: S type screw clamp, except for:
Screw spindle for 144 x 144 mm panel meters
Options: see next page
Scale Interchangeable scales
Scales may only be replaced under voltage-free conditions!
Replaceable Bezels and glass faceplates
May only be replaced under voltage-free conditions!
Terminals M4 screw terminals with self-lifting terminal clips. Screws
can be turned with cross-head or standard screw drivers.
Terminal Designation “11” and “12”, except for:
“17” and “18” for 144 x 144 mm panel meters
Contact Protection Finger-safe full cover included
Reference Quantities Reference Conditions
Ambient Temperature 23°C ±2°C
Position of Use control panel vertical ±1°
Input Voltage nominal voltage
Waveshape sine, distortion factor 0%
Warm-Up Time 5 min
Other DIN EN 60051
Input Voltage nominal voltage ± 20%
Exception: Frequency meter for static transducer:
60 ... 300 V
Waveshape sine, distortion factor 15%
h
f
t
l
1
x l
2
a
1
x a
2
Front in mm Nominal Dimensions, mm Cutout Dimensions, mm Installation Depth Including Terminals (t), mm Installation Depth Incl. Full Cover (f), mm
a
1
x a
2
h
I
1
x I
2
M4
48 x 48 48 x 48 5 45
+0.6
x 45
+0.6
54 62.5
72 x 72 72 x 72 5 68
+0.7
x 68
+0.7
54 62.5
96 x 96 96 x 96 5 92
+0.8
x 92
+0.8
54 62.5
144 x 144 144 x 144 8 138
+1
x 138
+1
54 62.5
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