Daytronic 10A9-8C Handleiding

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1GENERALDESCRIPTIONANDSPECIFICATIONS

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 Boxwith a

Model 10A9-8C to move the temperature-compensated reference junction to the actu-

al site of up to eight

remotethermocouple 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).*

SYSTEM10

ANALOGINPUTCARDS

MODEL10A9-8C

EIGHT-CHANNELTHERMOCOUPLE

CONDITIONERCARD

1.E.2.10A9-8C

GENERALDESCRIPTIONANDSPECIFICATIONS10A9-8C.1

*The 10CTJB-8 can only be used in environments with an ambient temperature between 0°F

and +140°F.

Product specificaties