Daytronic 10A10-4 Bedienungsanleitung


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1 GENERAL DESCRIPTION AND SPECIFICATIONS
The Model 10A10-4 is a precision conditioner designed for TC-based temperature
measurements requiring
high input isolation. With built-in reference-junction compen-
sation, it accepts up to four independent temperature signals from
Types B, E, J, K, R,
S, and T Thermocouples
. Any desired mixture of these thermocouple types is per-
mitted. Sensors may be grounded or ungrounded, in any desired mix. An amplifier-
per-channel design with chopper stabilization and active low-pass filtering allows
high-speed scan switching of high-level, stabilized signals, at exceptionally low cost
per channel.
All four 10A10-4 inputs are transformer-isolated, so that sensor-to-chassis and/or sen-
sor-to-sensor common-mode voltages as high as 1500 V-DC can be accommodated
at DC or low frequencies without damaging the instrument or perceptibly affecting
measurement accuracy (at 60 Hz, the common-mode voltage can be as high as 1000
V-AC (rms)).
During operation, appropriate reference-junction compensation, real-time digital lin-
earization, and engineering-unit scaling are automatically applied by the System 10
Central Processor for each type of thermocouple used. Detection of “open” thermo-
couples is also provided, as explained in Section 3.a.
The Model 10A10-4 includes a rear-panel connector block with screw terminals for
direct attachment of TC leads (which cannot be soldered). The same connector
accommodates all TC types. Since the connector assembly also contains a dual-
bead
precision thermistor for measurement of the reference-junction temperature,
no external cold junction is required—although the user may supply his own Con-
trolled Ambient Temperature Zone for reference-junction compensation, if desired.
The reference-junction-corrected temperature is made available to the Central
Processor through the
Model 10A11 Thermocouple Output Processor Card. The
purpose of the 10A11 is to proportion and sum the cold-junction reference signal and
the amplified TC signal of each channel for presentation to the system's Analog Signal
Bus.
One 10A11 must therefore be installed in every System 10 A-card rack contain-
ing one or more Model 10A10-4's.
You can use an optional Model 10CTJB-8 Thermocouple Junction Box with a
Model 10A10-4 to move the temperature-compensated reference junction to the actu-
al site of up to eight
remote thermocouple sensors. As explained in Section 4, below,
TC leads connect directly to the 10CTJB-8's internal screw terminals, in any desired
type mixture. The Junction Box then sends their signals to the 10A10-4 Conditioner
via copper conductors (only).*
SYSTEM 10
ANALOG INPUT CARDS
MODEL 10A10-4
QUAD ISOLATED THERMOCOUPLE
CONDITIONER CARD
1.E.2.10A10-4
GENERAL DESCRIPTION AND SPECIFICATIONS 10A10-4.1
* The 10CTJB-8 can only be used in environments with an ambient temperature between 0° F
and +140° F.
ADDITIONAL 10A10-4 SPECIFICATIONS
Measurement Range and Resolution
: See Table 1, below; automatically selected—
on an individual channel basis—when the channel is configured; for System 10 chan-
nal “type” codes assigned to 10A10-4 data channels, see Table 1
Linearization: Internal digital look-up via system processor; maximum error: ±0.05° C
Reference-Junction Compensation: At connector block, using a built-in precision
thermistor, or at remote TC site, using the
Model 10CTJB-8 Thermocouple Junc-
tion Box
*
Thermocouple Break Detection (per channel): Off-scale negative indication
Amplifier (per channel):
Common-Mode Range: At DC, ±1500 V-DC operating and without instrument dam-
age; at 60 Hz, ±1000 V-AC (rms) without damage
Common-Mode Rejection Ratio: DC: -154 dB; at 60 Hz: -160 dB
Input Impedance: Differential: 10 M; Common-Mode: infinite
Offset: Initial: ±5 µV; vs. Temperature: ±0.1 µV/°C; vs. Time: ±1 µV/month
Gain Accuracy: ±0.02% of absolute mV input range of -10 to +80 mV
Gain Stability: vs. Temperature: ±25 ppm/°C; vs. Time: ±20 ppm/month
Filter (per channel): 3-pole modified Butterworth; 3 dB down at 1 Hz; 60 dB down at
60 Hz
Step-Response Settling Time (Full-Scale Output):
To 1% of final value: 0.3 sec
To 0.1% of final value: 0.6 sec
To 0.02% of final value: 1.5 sec
Total System Accuracy (typical, including Model 10A10-4, Model 10A11 Thermo-
couple Output Processor, and system data collection and processing): see Table 1,
below
Auxiliary Outputs to Mainframe Wire-Wrap Pins: None
Table 1 Thermocouple Ranges for the Model 10A10-4
Typical Maximum Channel
TC Display System Expected Type
Type Range Resolution Accuracy** Error** Code
E-130° C to +1000° C 0.1° C ±0.4° C ±0.6° C 20
J-130° C to +750° C 0.1° C ±0.5° C ±0.7° C 21
K -75° C to +1350° C 0.1° C ±0.7° C ±1.1° C 22
R -20° C to +1750° C 0.1° C ±1.1° C ±2.1° C 23
S -20° C to +1750° C 0.1° C ±1.1° C ±2.1° C 24
T-130° C to +400° C 0.1° C ±0.5° C ±0.8° C 25
B +480° C to +1820° C 0.1° C ±1.1° C ±2.1° C 26
E-200° F to +1800° F 0.2° F ±0.8° F ±1.2° F 28
J-200° F to +1400° F 0.2° F ±0.8° F ±1.2° F 29
K-100° F to +2500° F 0.2° F ±1.2° F ±2.0° F 2A
R0°F to +3200° F 0.2° F ±2.0° F ±3.8° F 2B
S0°F to +3200° F 0.2° F ±2.0° F ±3.8° F 2C
T-200° F to +750° F 0.2° F ±0.8° F ±1.2° F 2D
B +900° F to +3300° F 0.2° F ±2.0° F ±3.8° F 2E
(cont’d)
10A10-4.2 GENERAL DESCRIPTION AND SPECIFICATIONS
10A10-4 QUAD ISOLATED THERMOCOUPLE CARD
* The 10CTJB-8 can only be used in environments with an ambient temperature between 0° F
and +140° F.
** Including ± one count of least significant digit displayed. Can be readily improved by control of
instrument temperature, calibrating at known temperatures, etc.


Produktspezifikationen

Marke: Daytronic
Kategorie: Nicht kategorisiert
Modell: 10A10-4

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