Daytronic AA14-4F010 Bedienungsanleitung
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AA14-4F010
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1 GENERAL DESCRIPTION AND SPECIFICATIONS
The AA14-4F010 is a high-isolation, four-channel conditioner, accepting real-world
temperature signals from
Types E, J, K, N, R, S, and T Thermocouples. Based on
NIST polynomials, linear output is produced over each thermocouple’s stated operat-
ing range, and within the rated accuracy limits—
without the need for additional output
processing.
See Table 1 for the “mV/degree” linear output produced by the AA14-
4F010 for different TC types and ranges (°C or °F).
PLEASE NOTE: WHILE ALL FOUR CHANNELS OF A GIVEN AA14-4F010 CARD MUST
BE DEDICATED TO THE SAME TC TYPE
, INDIVIDUAL CARDS DEDICATED TO DIFFER-
ENT TC TYPES MAY BE MIXED AS DESIRED WITHIN THE TOTAL DATA ACQUISITION
SYSTEM. IT IS ALSO REQUIRED THAT THE AA14-4F010’S
CHANNEL NO. 1 BE USED.
This conditioner features
true galvanic isolation with pulse-width modulation,
allowing sensor-to-chassis or sensor-to-sensor common-mode voltages as high as
1500 V (rms) to be accommodated. Internal reference-junction compensation is auto-
matically selected by thermocouple choice. No external cold junction is required
(although the user may supply his own Controlled Ambient Temperature Zone for ref-
erence-junction purposes, if desired). A conventional Daytronic four-channel isother-
mal connector assembly (No. 60323, shown in Figs. 2 and 3) is supplied with each
Model AA14-4F010, with screw terminals for direct connection of TC leads (which can-
not be soldered), and with a
precision thermistor for measurement of the reference-
junction temperature. The same connector may be used with any TC type.
In the event of a broken thermocouple wire or other “open TC” condition, the AA14-
4F010 will automatically report an indeterminate off-scale reading for the TC channel
in question, with positive or negative polarity selectable on a per-channel basis (as
explained in Section 3.a).
Each AA14-4F010 input channel employs an active low-pass filter with a fixed cutoff
frequency of 10 Hz. A nominal ±5-V ANALOG OUTPUT is produced by each active
AA14-4F010 input channel, for purposes of real-time signal monitoring. Each of these
“Auxiliary Outputs” is available on a corresponding mainframe wire-wrap pin. Each
output may be individually set, if desired, to represent the
prefiltered value of the cor-
responding input (see Section 3.b).
“Absolute” calibration lets you quickly set up each TC-based data channel simply by
entering appropriate “type” and “range” information. During operation, appropriate
reference-junction compensation, real-time digital linearization, and engineering-unit
scaling are automatically applied for each type of thermocouple used. A second, two-
point “zero and span” calibration technique is provided, however, for applications
where it is desirable to force multiple TC readings to the same exactly known temper-
ature.*
MODEL AA14-4F010
THERMOCOUPLE
CONDITIONER CARD
GENERAL DESCRIPTION AND SPECIFICATIONS AA14-4F010.1
SYSTEM 10
ANALOG INPUT CARDS
* In heat balance applications, for example, it is useful to be able to zero all readings simultane-
ously.
1.E.2.AA14-4F010
Produktspezifikationen
| Marke: | Daytronic |
| Kategorie: | Nicht kategorisiert |
| Modell: | AA14-4F010 |
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