參數(shù)資料
型號: PCL-818L
廠商: Electronic Theatre Controls, Inc.
英文描述: High-performance DAS card with programmable gain
中文描述: 高性能DAS的可編程增益卡
文件頁數(shù): 70/74頁
文件大?。?/td> 546K
代理商: PCL-818L
68
PCL-818L User's Manual
Regular calibration checks are important to maintain accuracy in data
acquisition and control applications. We provide a calibration pro-
gram, CALB.EXE, on the PCL-818L software disk to assist you in this
task.
The minimum equipment required to perform a satisfactory calibration
is a 4-digit digital multimeter and a voltage calibrator or a stable,
noise free D. C. voltage source. You may also want a card extender,
such as the Advantech PCL-757 ISA-Bus Switch/Extension Card. The
PCL-757 transparently extends the PC-bus connector to the top of the
chassis, giving safe and easy access to the PCL-818L during calibra-
tion or other tasks.
The CALB.EXE makes calibration easy. It leads you through the
calibration and setup procedure with a variety of prompts and graphic
displays, showing you all of the correct settings and adjustments. The
explanatory material in this section is brief, intended for use in
conjunction with the calibration program.
VR assignment
The five variable resistors (VRs) on the PCL-818L board help you
make accurate adjustments on all A/D and D/A channels. See the
figure in Appendix B for help finding the VRs. The following list
shows the function of each VR:
VR
VR1
VR2
VR3
VR4
VR5
Function
A/D full scale adjustment
A/D bipolar offset
D/A full scale adjustment
D/A offset adjustment
Programmable gain amplifier offset
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