Daytronic 10A9-8C Bedienungsanleitung
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1 GENERAL DESCRIPTION AND SPECIFICATIONS
The Model 10A9-8C is a general-purpose conditioner with built-in reference-junction
compensation. It accepts up to eight independent temperature signals from
Types B,
E, J, K, R, S, and T Thermocouples
. Any desired mixture of these thermocouple
types is permitted. 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.
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.
The Model 10A9-8C 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.
NOTE: When the 10A9-8C is used in System 10, the reference-junction-corrected tem-
perature is made available to the Central Processor through the
Model 10A11 Ther-
mocouple 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 containing one or more Model 10A9-8C's.
In the event of a broken thermocouple wire or other “open TC” condition, the 10A9-8C
will automatically report an indeterminate off-scale reading for the TC channel in ques-
tion, with positive or negative polarity selectable on a per-channel basis (as explained
in Section 3.a).
You can use an optional
Model 10CTJB-8 Thermocouple Junction Box with a
Model 10A9-8C 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 10A9-8C Conditioner
via copper conductors (only).*
SYSTEM 10
ANALOG INPUT CARDS
MODEL 10A9-8C
EIGHT-CHANNEL THERMOCOUPLE
CONDITIONER CARD
1.E.2.10A9-8C
GENERAL DESCRIPTION AND SPECIFICATIONS 10A9-8C.1
* The 10CTJB-8 can only be used in environments with an ambient temperature between 0° F
and +140° F.
ADDITIONAL 10A9-8C 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 10A9-8C 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 positive or negative indi-
cation, selectable by internal programming jumpers
Amplifier (per channel):
Normal-Mode Range: ±80 mV operating; ±100 V without instrument damage
Common-Mode Range: ±20 V operating; ±50 V without instrument damage
Common-Mode Rejection Ratio: DC: -116 dB; at 60 Hz: -120 dB
Input Impedance: Differential: 10 MΩ; Common-Mode: 0.5 MΩ
Offset: Initial: ±5 µV; vs. Temperature: ±0.1 µV/°C; vs. Time: ±1 µV/month
Gain Accuracy: ±0.05% of absolute mV input range of -10 to +80 mV
Gain Stability: vs. Temperature: ±50 ppm/°C; vs. Time: ±20 ppm/month
Filter (per channel): 2-pole modified Butterworth; 3 dB down at 1 Hz; 60 dB down at
50 Hz
Step-Response Settling Time (Full-Scale Output):
To 1% of final value: 0.75 sec
To 0.1% of final value: 4 sec
To 0.02% of final value: 8 sec
Total System Accuracy (typical, including Model 10A9-8C, Model 10A11 Thermo-
couple Output Processsor, 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 10A9-8C
Typical Maximum Channel
TC Display System Expected Type
Type Range Resolution Accuracy** Error** Code
E-130° C to +1000° C 0.1° C ±0.6° C ±0.8° C 20
J-130° C to +750° C 0.1° C ±0.8° C ±1.3° C 21
K -75° C to +1350° C 0.1° C ±1.1° C ±1.5° C 22
R -20° C to +1750° C 0.1° C ±1.3° C ±2.6° C 23
S -20° C to +1750° C 0.1° C ±1.3° C ±2.6° C 24
T-130° C to +400° C 0.1° C ±0.7° C ±1.1° C 25
B +480° C to +1820° C 0.1° C ±1.3° C ±2.6° C 26
E-200° F to +1800° F 0.2° F ±1.0° F ±1.4° F 28
J-200° F to +1400° F 0.2° F ±1.4° F ±2.2° F 29
K-100° F to +2500° F 0.2° F ±1.8° F ±2.6° F 2A
R0°F to +3200° F 0.2° F ±2.2° F ±4.6° F 2B
S0°F to +3200° F 0.2° F ±2.2° F ±4.6° F 2C
T-200° F to +750° F 0.2° F ±1.2° F ±1.8° F 2D
B +900° F to +3300° F 0.2° F ±2.2° F ±4.6° F 2E
(cont’d)
10A9-8C.2 GENERAL DESCRIPTION AND SPECIFICATIONS
10A9-8C EIGHT-CHANNEL 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: | Messung |
| Modell: | 10A9-8C |
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