Daytronic 10A41-2C Bedienungsanleitung
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10A41-2C
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1 GENERAL DESCRIPTION AND SPECIFICATIONS
Employing a 1-MHz crystal reference, the two-channel Model 10A41-2C is for mea-
surement of flow, rpm, and other phenomena that can be sensed by pulse trans-
former transducers with two-wire isolated windings (tachometer pickups, turbine
flowmeters, etc.), transistor or logic-circuit drivers, “zero-velocity” (true digital output)
sensors, and similar
frequency-generating transducers.
The 10A41-2C accepts a wide range of wave shapes and voltage levels, either
grounded or floating—though it is not recommended for measuring frequencies under
25 Hz without special modification. The “Smart Schmitt” threshold level for each input
channel may be individually selected via internal jumper connections, depending on
the expected peak voltage input. This ensures reliable triggering when the input is at
the low end of the voltage range. All ranges are protected against an overload of up
to 200 V. Nominal ±5 V-DC excitation is supplied for use with a “zero-velocity” sensor.
Capacitive coupling of 0.1 or 22 µF is provided for low-frequency inputs, to eliminate
false triggering by signal noise and/or any positive or negative DC offset that exists for
the frequency signal.
One of four separate filter bandwidths is available for each input channel: 1.25 Hz;
2.5 Hz; 5 Hz; or 12.8 Hz. Per-channel bandwidth is selectable via internal jumpers.
Each channel is normally preset for the 1.25-Hz bandwidth, which, while yielding the
slowest response, also provides the
widest dynamic range for high-frequency inputs
(2% to 100% of full scale for the 1-kHz and 2-kHz ranges; 1% to 100% of full scale for
ranges above 2 kHz). For faster response, you may select one of the higher filter
bandwidths (see Table 1, below).
The System 10 Central Processor controls frequency-range selection and applies an
appropriately calculated scaling factor to each measurement, if desired, following initial
entry of a special
FREQUENCY CALIBRATION (FRQ) command (see Section 3.c,
below). This convenient “calculated” calibration technique can be used for a 10A41-2C
data channel when the manufacturer-supplied full-scale rating of the frequency source
(or the highest frequency expected to be measured) is known. The 1-MHz crystal fre-
quency reference ensures accuracy of all calibrations, whether “absolute,” “calculated”
(via the
FRQ command), or “two-point” (“dead-weight”).
ADDITIONAL 10A41-2C SPECIFICATIONS
Input:
Type: Any AC or unipolar pulse signal, grounded or floating, irrespective of waveform
Threshold Level: Accommodates signals from 100 mV to 200 V
(cont’d)
MODEL 10A41-2C
DUAL FREQUENCY INPUT
CONDITIONER CARD
GENERAL DESCRIPTION AND SPECIFICATIONS 10A41-2C.1
SYSTEM 10
ANALOG INPUT CARDS
1.E.2.10A41-2C
Produktspezifikationen
| Marke: | Daytronic |
| Kategorie: | Nicht kategorisiert |
| Modell: | 10A41-2C |
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