Daytronic 10A10-4 Bedienungsanleitung

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1GENERALDESCRIPTIONANDSPECIFICATIONS

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 Boxwith a

Model 10A10-4 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 10A10-4 Conditioner

via copper conductors (only).*

SYSTEM10

ANALOGINPUTCARDS

MODEL10A10-4

QUADISOLATEDTHERMOCOUPLE

CONDITIONERCARD

1.E.2.10A10-4

GENERALDESCRIPTIONANDSPECIFICATIONS10A10-4.1

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

and +140°F.

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