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PCM-3718H/3718HG User's Manual
Regular calibration checks are key factors for accuracy maintenance.
We provide a calibration program, CALB.EXE, in the PCM-3718H/
3718HG’s CD-ROM to assist you in this task.
The CALB.EXE makes calibration easy. It leads you through the
calibration and setup procedures with a variety of prompts and
graphic displays, showing you all of the correct settings and adjust-
ments. The explanatory material in this section is brief, intended for
use in conjunction with the calibration program.
To perform a satisfactory calibration, you need a 4½-digit digital
multimeter and a voltage calibrator or a stable, noise-free D. C.
voltage source.
9.1 VR Assignment
The five variable resistors (VRs) on the PCM-3718H/3718HG board
help you make accurate adjustments on all A/D. See the figure on
page 5 for the VR locations on the board. The following list shows the
function of each VR:
VR
Function
VR1
A/D full scale adjustment
VR2
A/D bipolar offset
VR3
A/D unipolar offset
9.2 A/D Calibration
Regular and accurate calibration procedures ensure the maximal
accuracy. The CALB.EXE calibration program leads you through the
whole A/D offset and gain adjustment procedure. The basic steps are
outlined below:
1. Connect an external DC voltage source with value of 0.5 LSB to A/
D Channel 0 (pin 1 on connector P1).
Summary of Contents for 3718HG
Page 1: ...PCM 3718H 3718HG PC 104 12 bit DAS Module with Programmable Gain User s manual ...
Page 2: ......
Page 5: ...1 General Information CHAPT ER ...
Page 13: ...2 Installation CHAPT ER ...
Page 21: ...3 Signal Connections CHAPT ER ...
Page 26: ...22 PCM 3718H 3718HG User s Manual ...
Page 27: ...4 Register Structure and Format CHAPT ER ...
Page 38: ...34 PCM 3718H 3718HG User s Manual ...
Page 39: ...5 A D Conversion CHAPT ER ...
Page 45: ...6 Digital Input Output CHAPT ER ...
Page 47: ...7 Programmable Pacer CHAPT ER ...
Page 57: ...8 Direct Memory Access Operation CHAPT ER ...
Page 60: ...56 PCM 3718H 3718HG User s Manual ...
Page 61: ...9 Calibration CHAPT ER ...
Page 64: ...60 PCM 3718H 3718HG User s Manual ...