Daytronic 10A68-2 Handleiding

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1GENERALDESCRIPTIONANDSPECIFICATIONS

Using the special screw-terminal connector board described in Section 2, the Model

10A68-2 accurately measures the true RMS amplitude of one or two independent

external analog AC signals, mixed as desired, from a wide range of voltage or cur-

rent sources

—including engineering parameters conditioned by other Daytronic

cards.

Since the 10A68-2 does not provide excitation, the analog source must supply its own

power supply

, if required (as is the case with many accelerometers, when used to

measure the noise level or vibration factor of a dynamic process). The card is particu-

larly useful in evaluating the

efficiency of AC electrical power systems.

ADDITIONAL10A68-2 SPECIFICATIONS

Transducer Types

: AC signal sources (voltage or current)

Input Voltage and Current Ranges: See Table 1, below, for allowable full-scale input

ranges (given for each range are the corresponding

normal-mode input impedance

(z

i

), maximum normal-mode input voltage or current with no instrument damage

(V

max

or I

max

), and bandwidthflat to 0.1%, 1%, and 3 dB, respectively); automatically

selected—on an individual channel basis—when the channel is configured; for the

System 10 channel “type” codes assigned to 10A68-2 data channels, see Table 2,

below

Amplifier (per channel): Floating, with RMS Converter (see Table 1 for bandwidths)

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

Common-Mode Rejection Ratio: DC and at 60 Hz: infinite; at 1 kHz: -60 dB

Input Impedance (Common-Mode): Essentially infinite for all input ranges

Offset: Initial: ±0.04% of full scale; vs. Temperature: ±20 ppm/°C; vs. Time: ±20

ppm/month

Gain Accuracy: ±0.05% of full scale typical, following calibration*

Gain Stability (all ranges except 5 A): vs. Temperature: ±50 ppm/°C; vs. Time: ±20

ppm/month

Gain Stability (5-A range only): vs. Temperature: ±500 ppm/°C; vs. Time: ±20

ppm/month

(cont'd)

*Initial (uncalibrated) inaccuracy may be as great as ±0.1% of full scale for all input ranges

except 5 A, for which it may be as great as ±0.5%. Maximum error that could occur upon

replacement of a Model 10A68-2 not followed by calibrationis ±0.2% of full scale (±1% for 5-A

range).

MODEL10A68-2

DUALACRMS

C

ONDITIONERCARD

GENERALDESCRIPTIONANDSPECIFICATIONS10A68-2.1

SYSTEM10

ANALOGINPUTCARDS

1.E.2.10A68-2

Product specificaties