240 Series DIN Panel Meters

8

Features

An extensive range of specialist

measuring meters in 4 case sizes

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

Low cost

Local indication

Ease of installation

Minimal training

Low maintenance

Customised options and features

Applications

Switchgear

Distribution systems

Generator sets

Control panels

Energy management

Building management

Utility power monitoring

Process control

Motor control

Approvals

LRS and BV Approvals.

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

with oil damping.

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.

Illumination

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.

Replaceable 6, 12 or 24V lamps are used on all models except 243 longscale meters,

where the lamps are internal.

Specification

Performance

BSEN60051

Measuring Ranges

DIN 43701

Accuracy Overload

BSEN60051

Dimensions

DIN 43700

Scale Marking Generally

DIN43802

Magnetic Influence

BSEN60051

Safety

IEC414

Terminals

Clamp strap M4 up to 25A. Clamp strap M8 over 25A

Humidity Range

Up to 95% RH (non condensing)

Test Voltage @50Hz

2kV RMS for 1 minute

Overload AC Current

x 1.2 continuous x 10 for 5 seconds

Overload AC Voltage

x 1.2 continuous x 2 for 5 seconds

Frequency

See main pages for other instruments

Damping Time

Less than 3 seconds is standard. More heavily damped

movements are available on request.

Standard Calibration

23°C

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

Grade UL94V0

Base

Grade UL94V1