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
with oil damping.
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
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.
Benefits
Low cost
Local indication
Ease of installation
Minimal training
Low maintenance
Customised options and features
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.
Applications
Switchgear
Distribution systems
Generator sets
Control panels
Energy management
Building management
Utility power monitoring
Process control
Motor control
Specification
Performance
Measuring Ranges
Accuracy Overload
Dimensions
Scale Marking Generally
Magnetic Influence
Safety
Terminals
Humidity Range
Test Voltage @50Hz
Overload AC Current
Overload AC Voltage
Frequency
Damping Time
Standard Calibration
Operating Temperature
Enclosure Code
BSEN60051
DIN 43701
BSEN60051
DIN 43700
DIN43802
BSEN60051
IEC414
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
-20°C to +60°C
IP54 as standard (to BSEN60529). IP55 consult factory
Terminals IP20B with terminal cover or terminal
boots fitted
Grade UL94V0
Grade UL94V1
Approvals
LRS and BV Approvals.
Case
Base
8
240 Series DIN Panel Meters
DIN 16257 symbol meaning for
calibration position
Vertical
Specification Continued
Case
Dimensions and panel cutout conform to IEC473, DIN
43700. Models 242, 243 and 244 have cases and bezels
injection moulded in flame retardant engineering
thermoplastic, recognised by Underwriters Laboratory
materials specification. All 246 models have pressed
steel cases.
Slim-line DIN43802 black as standard
Standard sheet glass, with zero adjusters where
appropriate. Non reflecting glass or polycarbonate
shatterproof windows are available.
Installations in switchboard panel or mosaic
arrangement on equipment or machine with a panel
thickness of up to 40mm in a horizontal or vertical
plane. Installation Category III
Models 242, 243 and 244 – 2 corner fixing clamps and
tensioning thumb screws
Model 242 – available with a one piece ‘push on’ clamp.
Model 246 - 2 side fixing spring clips
Normal vertical mounting or as indicated on the scale
in accordance with DIN 16257. A deviation of ±15° is
permissible
Lloyds Shipping (LRS), Bureau Veritas (BV), EMC and LVD
Horizontal
Bezel
Bezel Window
Installation
Inclined
60°
Inclination of dial surface to the
horizontal e.g 60°.
Required orientation must always be
stated when ordering if other than
vertical mounting is required.
Fixing on Panel
Mounting Position
Approvals
Dimensions
Model
Bezel ‘A’
Panel cut-out ‘B’
Scale Length: 90°
Scale Length: 240°
Maximum overall depth ‘C’:
Ammeters and Voltmeters A.C. & D.C.*
Ammeters and Voltmeters with switch*
Dual Meters*
Elapsed Time Meter/Hours Run*
Maximum Demand Indicator*
Combined MDI & MI Indicator*
Maximum Demand Indicator with relay*
Frequency Meter 90°*
Frequency Meter 240°*
Phase Angle, Power Factor Meter 90°*
240°*
M.C. Indicator with separate transducer*
Dynamometer 360° Synchroscope*
Dynamometer 360° Power Factor Meter*
Phase Sequence Indicator*
Position Indicator*
Speed Indicator*
Temperature Indicators*
Quadra Meters*
Impulse Counters*
Wattmeter, Varmeter 90°
Wattmeter, Varmeter 240°
Model 244-21Y & 244-21Z
LED Synchroscope & Synchro Check Relay
LED 360° Synchroscope
§
*
–
242
48 x 48
45 x 45
42
72
64
–
–
64
–
–
–
64
§
§
§
64
–
–
–
§
64
–
–
64
§
§
–
–
–
243
72 x 72
68 x 68
65
112
64
–
–
64
64
–
–
64
§
§
§
64
–
–
64
§
64
–
–
64
§
§
–
–
–
244
96 x 96
92 x 92
94
150
64
64
64
64
64
64
90
64
120
107
107
64
120
120
64
120
64
120
64
64
107
107
142
80
80
246
144 x 144
138 x 138
145
230
60
–
–
–
60
60
–
60
125
§
§
60
125
–
–
125
60
125
–
–
125
125
–
–
–
C
A
A
Panel cut-out
Maximum Panel
thickness 10mm
B
B
Indicator Only
If separate terminal cover is used add 20 mm to dimension C
Not available
9
240 Series DIN Panel Meters
Moving Iron A.C. Ammeters and Voltmeters
Designed to measure A.C. current or voltage, these meters indicate true r.m.s. values
and are substantially independent of system waveform. Scales are calibrated down
to 20%, and ammeters can have overload scales x2, x3, x5 or x6 for motor start duty.
Ammeters can be supplied for use with -/1A or -/5A current transformers, whilst
voltmeters can be scaled for use with voltage transformers. Heavy damping is
available as an option. Meters can be used to measure D.C. at reduced accuracy.
Specification – Short Scale
Accuracy:
Frequency:
Burden at 50Hz:
Ratings:
Class 1.5
50 or 60Hz, (400Hz on request)
Ammeters: 0.5VA
Voltmeters: Up to 4.5VA maximum
Ammeters: 0.5A to 100A A.C. direct connected (40A for
242-75A and 246-07A). Maximum system voltage
720V A.C. Low load / high middle maximum 10A
Voltmeters: 6V to 600V
Connections
A.C. Ammeter
Product Codes – Short Scale
Bezel Size mm
Scale length mm
Product Codes
A.C. ammeter
x2 overload ammeter
x3 overload ammeter
x5 overload ammeter
x6 overload ammeter
Low load ammeter
A.C. voltmeter
Low middle voltmeter
48
42
242-75A
242-752
242-753
242-755
242-756
–
242-75V
–
72
65
243-02A
243-022
243-023
243-025
243-026
243-02H
243-02V
243-02M
96
94
244-02A
244-022
244-023
244-025
244-026
244-02H
244-02V
244-02M
144
145
246-07A
246-072
246-073
246-075
246-076
–
246-07V
–
Specification – Long Scale
Accuracy:
Frequency:
Burden at 50Hz:
Ratings:
Class 1.5
50 or 60Hz, (400Hz on request)
Ammeters: 1.5VA
Voltmeters: 4.5VA maximum
Ammeters: 0.5A to 25A A.C. direct connected
Maximum system voltage 720V A.C. Low load / high
middle (maximum 10A)
Voltmeters: 6V to 600V A.C.
A.C. Voltmeter
Product Codes – Long Scale
Bezel Size mm
Scale length mm
Product Codes
Ammeter
x2 overload ammeters
x3 overload ammeters
x5 overload ammeters
x6 overload ammeters
Low load ammeters
Voltmeter
48
72
242-03A
242-032
242-033
242-035
242-036
–
242-03V
72
112
243-03A
243-032
243-033
243-035
243-036
243-03H
243-03V
96
150
244-03A
244-032
244-033
244-035
244-036
244-03H
244-03V
144
230
246-03A
246-032
246-034
246-035
246-036
–
246-03V
10
240 Series DIN Panel Meters
Frequency Meters
These Frequency meters use an integral electronic converter and a moving coil
indicator. This meter is easy to read with an accuracy Class 0.5.
Specification
Accuracy:
Ratings:
Class 0.5
100V-125V A.C
200V-250V A.C.
380V-440V A.C.*
500V A.C.*
*For voltages above 380V use 242-013 with a 253-THZ,
in place of 242-41S
Models available for use with V.T.s
45/55Hz,
55/65Hz,
45/65Hz,
360/440Hz
Other scalings available on request
4VA Maximum
Frequency 0.5%:
Connections
Burden:
Product Code
Bezel Size mm
48
48
72
72
Scale length mm 42
72
65
112
Product Code
242-41S 242-053 243-41S 243-053
+253-THZ +253-THZ
96
96
144
144
94
145
244-41S 244-41L 246-41S 246-41L
Dual Frequency Meters
Two instruments in one case can be used to measure a wide range of frequencies.
These dual instruments save both panel space and assemly time. The 244-41D is an
ideal component in sychronising applications.
Specification
Accuracy:
Ratings:
Class 0.5
100V-125V A.C
200V-250V A.C.
380V-440V A.C.
500V A.C.
Models available for use with V.T.s
45/55Hz,
55/65Hz,
45/65Hz,
360/440Hz
4VA Maximum
Frequency 0.5%:
Connections
Burden:
Product Code
Bezel Size mm
Scale length mm
Product Code
96
65
244-41D
12
240 Series DIN Panel Meters
Moving Coil D.C. Ammeters and Voltmeters
Moving Coil Meters are suitable for all D.C. systems. The linear scale is calibrated
down to zero and the accuracy maintained down to 10%. High currents are measured
with separate shunts and suitably scaled indicators. Suppressed, centre and offset
zero models are available.
Specification
Accuracy:
Ratings:
Class 1.5
Ammeters: 100µA to 25A, (200µA for 05 model)
4/20mA suppressed zero
40A for model 243/244-01A
Voltmeters: 50mV to 600V
1/5V suppressed zero
50, 60, 75, 100, 150mV for use with shunts
Ammeters: 75mV internal shunt above 60mA
Voltmeters: 1000Ω/V above 1V
Connections
D.C. Ammeter
Impedance:
Further details on our T-Sheet T118 available on request.
Product Codes – Short Scale
Bezel Size mm
Scale length mm
Product Codes
Ammeters
Ammeters suppressed zero
Voltmeters
Voltmeters suppressed zero
48
42
242-89A
242-89R
242-89V
242-89S
72
65
243-01A
243-01R
243-01V
243-01S
96
94
244-01A
244-01R
244-01V
244-01S
144
145
246-10A
246-10R
246-10V
246-10S
D.C. Voltmeter
Product Codes – Long Scale
Bezel Size mm
Scale length mm
Product Codes
Ammeter
Ammeters suppressed zero
Voltmeters
Voltmeters suppressed zero
48
72
242-05A
242-05R
242-05V
242-05S
72
112
243-05A
243-05R
243-05V
243-05S
96
150
244-05A
244-05R
244-05V
244-05S
144
230
246-05A
246-05R
246-05V
246-05S
Moving Coil Dual D.C. Ammeters and Voltmeters
Dual instruments can be used to measure a wide range of currents and voltages,
and save both space and time by requiring only one panel cut-out.
The 244-80M allows for independent measurement of two D.C. currents in one case.
The 244-80E allows for independent measurement of two D.C. voltages in one case.
Specification
Connections
Dual D.C. Ammeter
Accuracy:
Ratings:
Class 1.5
D.C. Current: 100µA to 25A direct connected
4/20mA suppressed zero.
D.C. Volts: 50mV to 600V
1/5 volt suppressed zero
50, 60, 75, 150mV for use with shunts.
Product Codes
Bezel Size mm
Scale length mm
Product Code
Ammeters
Voltmeters
96
94
244-80M
244-80E
Dual D.C. Voltmeter
18
京公网安备 11010802033920号
EEWORLD
