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| Description |
| 96
x 48mm digital panel meters with 3.5 digit, 14.2mm
high 7 segment LED's. The products offer a
wide range of AC or DC input parameters.
Essentially there are 3 main product group
types:- AC Volts, Amps, Milliamps, DC
Volts, Amps, Milliamps, Millivolts, Frequency. |
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| Application: |
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With the combination
of mA input M300-AD1 and the M100 series
Power transducers, parameters such as
kW, kV, Ar etc can be measured and displayed.
Customer adjustment of botjh "ZERO" and
"SPAN" is permissible via
potentiometers, accessible from the rear of the
product. |
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| AC Inputs |
| Both
AC Voltage and Current circuits are average sensing RMS
calibrated. The input signal is transformed to a low
level of AC. The transformer secondary voltage is fed to
a precision active rectfier. The resulting DC signal is
presented to an analogue to digital A/D The A/D
converter uses the dual converter slope integration
method of conversion. The resulting digital information
is used to drive the LED display. |
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| DC Inputs |
| DC
Voltage and current inputs are fed into high stability
ranging components. The ranging components reduce
the input signal to a 2 volt level. If the input is
below 2 Volts and amplifier is employed to derive 2
Volts. The 2 Volt signal is then presented to the A/D
converter which provides the digital information to
drive the LED display. |
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| Frequency
Inputs |
| A
Frequency to Voltage F/V converter is used to convert
the output signal to a DC signal. The resulting DC
signal is fed into the A/D converter and the same
process as in the AC and DC circuits previously
described takes place |
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