Daytronic 10A17-2 Handleiding

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SYSTEM10

ANALOGINPUTCARDS

1.E.2.10A17-2

1GENERALDESCRIPTIONANDSPECIFICATIONS

The Model 10A17-2 is designed for high-accuracy temperature measurement using

platinum

Resistance Temperature Detectors (RTD's) and requiring high input isola-

tion.

Precision constant-current excitation is provided for two independent sensor

channels, which may be intermixed as required. Each input is transformer-isolated, so

that sensor-to-sensor common-mode voltages as high as 1500 V-DC can be accom-

modated without damaging the instrument or perceptibly affecting measurement

accuracy. Four-wire cabling, with maximum excitation of one milliampere and 0.004%

per ohm leadwire resistance rejection, eliminates common self-heating and cable-

loading errors. This conditioner is particularly useful in the utilities industry.

ADDITIONAL10A17-2 SPECIFICATIONS

RTD Types: Platinum; DIN (European) standard with “ice-point” resistance of 50, 100,

or 200 ohms, or American standard with “ice-point” of 100 ohms

Range and Resolution: See Table 1, below; automatically selected—on an individual

channel basis—when the channel is configured; for System 10 channel “type” codes

assigned to 10A17-2 data channels, see Table 1; for

high RTD resolution, using a

specially modified 10A17-2 card, see Section 3.b, below

Linearization: Internal digital linearization; maximum error: ±0.1°C (±0.2°F)

Excitation (per channel): Nominal 5 V-DC; 1 mA, maximum

Amplifier (per channel):

Common-Mode Range:±1500 V operating and without instrument damage

Common-Mode Rejection Ration: DC: -150 dB; at 60 Hz: -160 dB; at 1 kHz and 3

kHz; infinite

Leadwire Resistance Rejection (4-wire only): 0.004% per ohm

Offset: Initial: ±0.01% of full scale; vs. Temperature: ±10 ppm/°C; vs. Time: ±10

ppm/month

Gain Accuracy: ±0.02% of full scale

Gain Stability: vs. Temperature: ±50 ppm/°C; vs. Time: ±50 ppm/month

Filter (per channel): 3-pole modified Butterworth; 3 dB down at 2 Hz; 60 dB down at

30 Hz

Step-Response Settling Time (Full-Scale Output):

To 1% of final value: 260 msec

To 0.1% of final value: 500 msec

To 0.02% of final value: 600 msec

Total System Accuracy(typical, including Model 10A17-2 and system data collec-

tion and processing): see Table 1, below

Auxiliary Outputs: Filtered outputs available on mainframe wire-wrap pins

MODEL10A17-2

DUALHIGH-VOLTAGEISOLATIONRTD

C

ONDITIONERCARD

GENERALDESCRIPTIONANDSPECIFICATIONS10A17-2.1

Product specificaties