240 Series DIN Panel Meters
An extensive range of 48, 72, 96 and 144mm DIN style panel meters offering
measurement of all electrical and electronic parameters. Meters are shock resistant
and vibration proof and supplied with terminal covers. A selection of slide in dials
and customised options are available.
Movements
In Crompton Instruments’ world-patented ‘Hi-Q’ taut band suspension, all the
delicate parts of the traditional instruments are eliminated. There are no pivots, no
jewel bearings, no hair-springs and no air damping vane. Instead, a tough platinum
ribbon suspends the moving element between front and rear tension springs.
Specially contoured pads are fitted to the ends of the spindle, and the working gap at
each end is filled with a high quality silicon fluid. The pads, together with the fluid
reservoir, form a system which acts as a resilient built-in shock absorber. This
provides both rotational and longitudinal damping as the moving element floats on
oil with no bearing friction and is effectively cushioned against shock and vibration.
360° Synchroscopes and power factor meters have robust pivot and jewel bearings
Features
with oil damping.
An extensive range of specialist
measuring meters in 4 case sizes
Dials, Scales and Pointers
Standard dials are matt white with black printed scales and bar knife-edge pointers.
Black dials with white or yellow scales and pointers are also available.
Interchangeable slide in dials are used on models 242, 243 and 244 90° moving iron,
moving coil and frequency meters.
General options include red supplementary pointers, red indexes (quadrant scales),
red, green or blue lines, bands or segments, finely spaced divisions, multi-scales,
special scales and captions to customer' requirements.
Shock resistant taut band suspension
Vibration-proof Hi-Q damping
Slide in dials for 90°current, voltage and
frequency on models 242, 243 and 244
Terminal covers supplied as standard
Benefits
Illumination
Low cost
Internal illumination is available in the following models:
• 244 and 246 shortscale moving coil and moving iron vane.
• 243, 244 and 246 longscale moving coil and moving iron vane.
Through dial (Translucent) illumination on 244 and 246 models.
Edge illumination on 243, 244 and 246 models.
Local indication
Ease of installation
Minimal training
Low maintenance
Customised options and features
Replaceable 6, 12 or 24V lamps are used on all models except 243 longscale meters,
where the lamps are internal.
Specification
Performance
Measuring Ranges
Accuracy Overload
Dimensions
Applications
Switchgear
BSEN60051
DIN 43701
BSEN60051
DIN 43700
Distribution systems
Generator sets
Scale Marking Generally
Magnetic Influence
Safety
DIN43802
BSEN60051
IEC414
Control panels
Energy management
Building management
Utility power monitoring
Process control
Terminals
Clamp strap M4 up to 25A. Clamp strap M8 over 25A
Up to 95% RH (non condensing)
2kV RMS for 1 minute
x 1.2 continuous x 10 for 5 seconds
x 1.2 continuous x 2 for 5 seconds
See main pages for other instruments
Less than 3 seconds is standard. More heavily damped
movements are available on request.
23°C
Humidity Range
Test Voltage @50Hz
Overload AC Current
Overload AC Voltage
Frequency
Motor control
Damping Time
Approvals
LRS and BV Approvals.
Standard Calibration
Operating Temperature
-20°C to +60°C
Enclosure Code
IP54 as standard (to BSEN60529). IP55 consult factory
Terminals IP20B with terminal cover or terminal
boots fitted
Case
Base
Grade UL94V0
Grade UL94V1
8
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