Omega Vehicle Security 1400 J

API Commands Appendix A

A-38 ChartScan User’s Manual

J - Calibrate Cold Junction Offset

TYPE

Calibration

EXECUTION

Immediate

SYNTAX

Jchan,

type,

temp

Calibrate the cold-junction offsets for cold-junction compensation of the

thermocouple signals where chan is the channel number such that

1 < chan < max, where max = 128 for ChartScan/1400.

type is the thermocouple channel type.

temp is the reference temperature currently being applied to the selected

channel, with the form nnn.n in degrees º C.

DESCRIPTION

Note: This command is only for advanced users who perform their own calibration. It is not necess ary for

normal, everyday operation.

Active only in calibration mode, the Calibrate Cold Junction Offset (J) command is used to calibrate the cold

junction offsets for cold-junction compensation of the thermocouple signals. Each thermocouple input channel

has associated with it one of these temperature sensors. Although calibrated at the factory, these temperature

sensors are subject to component aging which may affect their accuracy over time. The func tion of the Calibrate

Cold Junction Offset (J) command is to allow the adjusting of the internal firmware to compens ate for the affects

of component aging.

Since there are 4 cold junction temperature sensors associated with 32 temperature input channels, i t is

necessary to select 4 channels. Each channel is associated with one of the 4 cold junction tem perature sensors

in order to calibrate all cold junction temperature sensors on a given card.

Note: Four separate channels on each card must be supplied with an accurate thermocouple signal of known

warm junction temperature.

The parameter type is the same channel type that is used with the Configure Channels (C) command.

After the command has been issued, the applied thermocouple signal must remain at its value until the trigger

LED stops flashing in order to achieve accurate results. For further details on channel calibration, s ee Chapter 6.

EXAMPLE

PRINT#1, “OUTPUT07;K12345X”

‘ Enter Calibration Mode

‘ Apply precision temperature

PRINT#1, “OUTPUT07;J1,2,101.7X”

‘ Compute cold junction offset for the temperature

sensor associated with the type K thermocouple

on channel 1 of card #1, at 101.7°C

‘ Wait for command to complete

‘ Remove precision temperature

PRINT#1, “OUTPUT07;EX”

‘ End calibration mode

Contents

Main OMEGAnetSM On-Line Service http://www.omega.com Internet e-mail info@omega.com Servicing North America: USA: Canada: How To Use This Manual Appendices Table of Contents 1 ChartScan- Unit Startup & ChartView Tutorial 2 General Information 3 Hardware 4 ChartView Software Reference 5 eZ-PostView and ViewXL 6 Calibration Appendices Page ChartScan Unit Startup and ChartView Tutorial 1 Unit Startup 1. Inspect Your System 2. Install Software 3. Check and Install Hardware a) Verify Voltage Setting b) Verify DIP Switch Setting c) Install Signal Conditioning Card(s) Page 5. Apply Power to ChartScan 6. Connect Channel Signal Inputs Page 7. Start ChartView, Configure System, and Collect Data = Mouse, = Arrow Keypads , or, or, F6 or,[Tab to and hit or, [Tab to and hit Page ChartView, Basic Concepts Configuration Files Understanding Groups, Charts, & Channels Three Ways of Using ChartView ChartView Tutorial 1. Select Interface Device (1) From Windows, start ChartView by double-clicking on the (3) Select Simulated Instrument. In an actual application you would select 2. Configure Chart Setup (5) Verify that the Advanced tab (under Automatic Chart Creation) is (6) Choose 2 for the number of groups. [Standard program is (7) Choose 3 for the number of charts. (8) Choose 4 for the number of channels. (9) Click Automatic Chart Creations/Create Charts. At this point (14) On ChartViews Main Window, click on Setup in the pull-down menu row. The Setup pull-down 4. Configure Acquisition. Page 5. Review Configuration. (20) (21) (22) (23) 6. [Optional]. Save Configuration File. Page Page General Information 2 General Description Operational Aspects Data Handling and Triggering Software and Hardware ChartScan Specifications General Channels Triggers Data Storage & Format Page Calibration Page Hardware 3 Front Panel Rear Panel ChartScan Rear Panel Power Aspects Memory Configuration Page RS-232/422 Interface Configurations Steps for RS-232/422 Configuration RS-232/422 Serial Settings (Standard Units) RS-232/422 Serial Settings (Early Production Units) Serial Port Pin Connectors Serial Port Pin Connector Signals for RS-232/422 Applications Ethernet Interface Configuration IEEE 488 Interface Configuration (Option) IEEE 488 Pinout Specifications Page IEEE 488 Configuration Settings Digital I/O Lines Logic Levels Digital I/O Port Pinout External TTL BNC Connectors Signal Conditioning Cards CSN14/TC/P Page CSN14/LV/ (T, B, & S) CSN14/HV/S CSN14/HV/S, High Voltage Card with Safety Jack Connectors CSN/Relay Card CSN/Relay Card Specifications Expansion Chassis, CSN/Exp (Option) Connecting the Expansion Chassis WARNING WARNINGWARNING WARNING Page Page Page Page ChartView Software Reference 4 ChartView, ChartView Plus, ChartViewNET, and ChartViewNET Plus Groups, Charts, & Channels Three Ways of Using ChartView Some of the data acquisition scenarios pertaining to ChartView are as follows: Four Basic Data Acquisition Sce narios What ChartView and ChartView Plus Provide Main Window = Mouse, = Arrow Keypads , or, F5 15 Multiply (x2) or, Tab-to/Spacebar or, Windows Pull- Channel Information Region Status Indicator Region Main Window Toolbar Group Select Start, Pause, and Stop Charts Scroll Faster & Scroll Slower Display Configuration Page Page Page Page Page Channel Configuration PostView post-acq data viewer Arm Acquisition Disarm... Print Charts Main Window Pull-Down Menus File File Menu Note Chart View Page Acquire Data Link to Excel Upload Data During Acquisition Stop Upload Window Device Setup IEEE 488 Setup RS-232/422 Page Page Device Setup Bar Graph, Analog, and Digital Meters Overview Bar Graph Meters Analog Meters Digital Meters Meter Toolbars Meter Pull-Down Menus Meters Configuration Menu Configuring a Meter Setup Window Channel & Alarm Setup Dialog Box Page Page Acquisition Setup Dialog Box Page Page Burst Mode, Operational Issues Measuring AC Voltage, or AC RMS Voltage Page Data Destination Dialog Box Page Chart Setup Wizard Introduction Automatic Chart Setup with Wizard Bypassing Automatic Chart Setup eZ-PostView and ViewXL 5 Introduction eZ-PostView ViewXL Calibration 6 Introduction Calibration Setup Page ScanCal Software Application ScanCals Main Window Using ScanCal Interface Parameters System Inventory Calibration Calibration Without ScanCal Password Mode Indicator Command Active Indicators Calibration of Main Unit Page Page Page Calibration of Signal Conditioning Cards Page Page Page Page Page Page Cold Junction Calibration Page Page Page Appendices Page Appendix A API Commands Command Syntax Case Sensitivity Spaces Multiple Parameters Command Strings Command Interpretation Immediate & Deferred Commands Page Deferred Commands, Order of Execution Command Summary Page Page Page Page Command Reference Command Description Format Type Execution The Commands @ *B *C *F *K *P *R *S *T A A# C Page Page C# D# E E? F Page Page F# G H I I# J K L M M# N O P ? Q Page QC? Page R R# S T Page U Page Page Page V W# X Y Appendix B Configuration Aspects for Programmers Memory Allocation Measuring Modes Overview Normal Mode High-Speed, Single-Channel Mode (Burst Mode) Configuration Requirements Channel Configuration CSN14/TC/P Configuring Thermocouple Channels CSN14/LV/ (T, B, or S) Configuring Low Volts Channels CSN14/HV/S Scan Configuration Configuring a Scan Configuring the Scan Interval Acquisition Configuration Introduction Pre-Trigger State Continuous, Gap-Free Acquisition with Two Timebases Page Post-Trigger State Post-Stop State Trigger and Stop Events Page Time Stamping (*T) Alarm Stamping (A#) Digital Input Stamping (I#) Page Acquisition Buffer, A Description Trigger Block Organization Page Multiple Trigger Blocks Acquisition Buffer Interrogation Page Page Reading the Acquisition Buffer Page Configuring Alarms Alarm Set Points Digital Alarm Outputs Set Point Hysteresis Digital I/O Operation Appendix C Registers, Data Formats, & Queries Using High/Low/Last (HLL) Registers HLL Register Contents Accessing HLL Registers Page Page Data Input Formats Data Output Formats Engineering Units Data Format Page Binary Data Format Counts Data Format Configuring Power-Up State Queries Query (?) Commands U Status Commands Status, Event Reporting, and Mask Registers Theory of Operation Page Calibration Status Register (U2 Command) Error Source Register (E? Command) Event Status Register Event Status Enable Register Status Byte Register Service Request Enable Register IEEE 488 Serial Poll Response Using Status Reporting Registers Trigger Latency Trigger Overrun Buffer Overrun Buffer Overrun With One Trigger Block Buffer Overrun With Multiple Trigger Blocks Real Time Clock Open Thermocouple/Range Error Checking Page Appendix D ChartScan Program Examples Note: Reading HLL Status using HLL16.BAS Reading HLL Data from T/C & Volts Cards using HLL32.BAS Acquiring Pre- & Post-Trigger Data at Different Rates using SLOW_ACQ.BAS Page Acquiring Pre- & Post-Trigger Data at the Same Rate using FAST_ACQ.BAS Operating Alarms using ALARM2.BAS Page Using the IEEE 488 SRQ with Alarms using ALAR2SRQ.BAS Collecting Data in Binary Format using BIN_ACQ.BAS Page Collecting Binary-Formatted HLL Data using BIN_HLL.BAS 'Decode received data and print on screen in ASCII 'Convert counts to Degree C or Voltage readings Using Auto-Rearm to Capture Multiple Trigger Blocks using BLK_ACQ.BAS After all 5 trigger blocks have been collected, the unit is disarmed by sending the T command. Configure for 12 Channels with Continuous Binary Upload using CONTIN_D.BAS Page 'Query the ChartScan for the # of scans available in the Buffer 'Upload available data Configure for High-Speed, Single-Channel Burst Mode using BURST.BAS 'Query the ChartScan for the # of 256 sample scans available in the Buffer 'Program terminators for LF EOI and a space between channels 'Upload data one scan at a time from the ChartScan Appendix E Bus States, Bus Lines, and Data Transfer Aspects Page Appendix F ASCII Code Summary A ASCII Code Details Decimal Values 00 to 31 ACG & UCG Characteristics Decimal Values 00 to 31 ACG & UCG Descriptions Decimal Values 32 to 63 LAG Decimal Values 64 to 95 TAG Decimal Values 96 to 127 SCG Page Appendix G ChartScan Error Messages Page Appendix H Abbreviations Page Index -A- -B- -C- -D- Page WARRANTY/DISCLAIMER RETURN REQUESTS/INQUIRIES TEMPERATURE PRESSURE, STRAIN AND FORCE FLOW/LEVEL pH/CONDUCTIVITY DATA ACQUISITION