TELEDYNE API T703U - Principles of Operation; Pneumatic Operation; Gas Flow Control

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181

9. PRINCIPLES OF OPERATION

9.1. PNEUMATIC OPERATION

GAS FLOW CONTROL 9.1.1.

Gas flow rates are set by various flow control assemblies in the gas stream(s),

locations indicated in Figure 9-1Figure 9-2.

Figure 9-1. Location of Gas Flow Control Assemblies - T703

07223D DCN7107

Main Page

Table of Contents9
Introduction17
T703/T703U Calibrator Overview17
Options18
Specifications and Approvals19
Specifications19
Table 2-1: T703/T703U System Specifications19
Table 2-2: T703/T703U Specifications for Ozone Generator19
Approvals and Certifications20
Safety20
Emc20
Other Type Certifications20
Table 2-3: T703/T703U Specifications for O20
Getting Started21
Unpacking and Initial Setup21
Front, Rear, and Internal Calibrator Description22
Figure 3-1: Front Panel Layout22
Figure 3-2: Display Screen and Touch Control23
Table 3-1: Display Screen and Touch Control Description23
Figure 3-3: Display/Touch Control Screen Mapped to Menu Charts24
Figure 3-4: Rear Panel Layout25
Table 3-2. Rear Panel Description25
Figure 3-5: T703 Internal Layout - Top View26
Figure 3-6: T703 Pneumatic Diagram27
Figure 3-7: T703U Internal Layout - Top View28
Figure 3-8: T703U Pneumatic Diagram29
Electrical Connections30
Power Connection30
Analog Output Test Channel Connections30
Figure 3-9: TEST CHANNEL Connector30
Connecting the Status Outputs31
Figure 3-10: Status Output Connector31
Table 3-3: Status Output Pin Assignments31
Connecting the Control Inputs32
Table 3-4: Control Input Pin Assignments32
Figure 3-11: Digital Control Input Connectors33
Connecting the Control Outputs34
Figure 3-12: Digital Control Output Connector34
Table 3-5: Control Output Pin Assignments34
Communication Connections35
Ethernet Connection35
USB Option Connection35
And RS485 Connection35
Multidrop Network Connection35
Pnenumatic Connections36
Dry Air in36
Zero Air in36
Figure 3-13: Basic Pneumatic Setup36
Output Manifold37
Exhaust37
Measuring an External Ozone Source37
Initial Operation37
Start-Up37
Warm up37
Warning Messages38
Table 3-6: Possible Warning Messages at Start-Up39
Functional Check40
Operating Modes for the O41
Cnst (Constant)41
Generator41
Bnch (Bench)41
Setting the O41
Generator Mode41
Setting the Output Flow Rate42
Calculating Output Flow Rate42
Output Flow Setup42
Figure 3-14: Output Pressure Regulator Assembly42
Operating the Calibrator43
Test Functions44
Table 4-1: Test Functions Defined44
Overview of Operating Modes45
Figure 4-1: Front Panel Display45
Table 4-2: Calibrator Operating Modes45
Standby Mode46
General Information about the GENERATE Mode47
GENERATE > AUTO: Basic Generation of Calibration Gas47
Automatic Calibration Sequences47
SETUP > SEQ: Programming Calibration Sequences48
Table 4-3: Automatic Calibration SEQUENCE Set up Attributes48
Table 4-4: Calibration SEQUENCE Step Instruction48
Activating a Sequence from the T703/T703U Front Panel49
Naming a Sequence50
Setting the Repeat Count for a Sequence51
Using the Internal Clock to Trigger Sequences52
Setting up Control Inputs for a Sequence55
Setting up Control Outputs for a Sequence56
Setting the Progress Reporting Mode for the Sequences57
Table 4-5: Sequence Progress Reporting Mode57
Adding Sequence Steps58
The GENERATE Step59
Figure 9-14: O59
The STANDBY Step60
The DURATION Step60
The EXECSEQ Step61
The CC OUTPUT Step62
Figure 9-15: O62
Figure 9-16: O62
Deleting or Editing an Individual Step in a Sequence63
Deleting a Sequence64
Setup > Cfg65
Setup > Clk66
Setting the Internal Clock"S Time and Day66
Adjusting the Internal Clock"S Speed67
Setup > Pass68
Table 4-6: Password Levels68
SETUP > DIAG > TEST CHAN OUTPUT: Using the TEST Channel Analog Output70
Configuring the TEST Channel Analog Output70
The Analog I/O Configuration Submenu70
Figure 4-2: TEST CHANNEL Connector70
Table 4-7: DIAG - Analog I/O Functions70
Selecting a TEST Channel Function to Output72
Table 4-8: Test Channels Functions Available on the Analog Output72
TEST Channel Voltage Range Configuration74
Table 4-9: Analog Output Voltage Range Min/Max74
Turning the TEST Channel Over-Range Feature ON/OFF75
Adding a Recorder Offset to the TEST Channel76
TEST Channel Calibration77
Enabling or Disabling the TEST CHANNEL Auto-Cal Feature78
Automatic TEST Channel Calibration79
Manual Calibration of the TEST Channel Configured for Voltage Ranges81
Figure 4-3: Setup for Calibrating the TEST CHANNEL81
Table 4-10: Voltage Tolerances for the TEST CHANNEL Calibration81
AIN Calibration83
SETUP > more > VARS: Internal Variables (VARS)84
Table 4-11: Variable Names (VARS)84
Operating the Calibrator as an Ophotometer85
Set up for Operation as an O86
Photometer86
Figure 4-4: Set up to Measure an External O Source86
SETUP > LVL: Setting up and Using LEADS (Dasibi) Operating Levels88
General Information about LEADS LEVELS88
Dot Commands88
Levels88
Activating an Existing LEVEL89
Programming New LEVELS90
Creating a Generate LEVEL91
Editing or Deleting a LEVEL92
Figure 4-5: LEADS Level Display Format92
Configuring LEVEL Status Blocks93
Communications95
Using the Analyser"S Communication Ports95
DTE and DCE Communication95
Serial COM Port Default Settings and Connector Pin Assignments96
Figure 5-1: Default Pin Assignments for Rear Panel COM Port Connectors (RS-232 DCE & DTE)96
Figure 5-2: CPU COM1 & COM2 Connector Pin-Outs for RS-232 Mode97
COM Port Baud Rate98
COM Port Communication Modes98
Table 5-1: COM Port Communication Modes99
COM Port Testing101
Machine ID102
Terminal Operating Modes103
Help Commands in Terminal Mode103
Table 5-2: Terminal Mode Software Commands103
Command Syntax104
Table 5-3: Teledyne API Serial I/O Command Types104
Data Types105
Status Reporting105
General Message Format106
COM Port Password Security106
Remote Access by Modem107
Multidrop RS-232 Set up109
Figure 5-3: Jumper and Cables for Multidrop Mode110
Configuration of COM2111
Remote Access Via the USB Port (Option)111
Figure 5-4: RS232-Multidrop PCA Host/Calibrator Interconnect Diagram111
Remote Access Via the Ethernet113
Table 5-4: Ethernet Status Indicators113
Configuring the Ethernet Interface Using DHCP114
Table 5-5: Lan/Internet Configuration Properties114
Manually Configuring the Network IP Addresses116
Changing the Calibrator"S Hostname118
APICOM Remote Control Program119
Figure 5-5: APICOM Remote Control Program Interface119
Calibration and Verification121
Verifying/Calibrating the O Photometer121
Setup for Verifying and Calibrating the O121
Generator122
Calibration Manifold Exhaust/Vent Line123
Figure 6-2: Set up for Verifying Optional O Photometer Using an External O Generator123
Verifying O Photometer Performance124
Calibrating the O3 Photometer124
Photometer Zero Calibration125
Photometer Span Calibration126
O 3 Photometer Dark Calibration127
O 3 Photometer Backpressure Compensation Calibration128
Calibrating the Ogenerator128
O 3 Generator Calibration Table129
Viewing Ogenerator Calibration Points130
Adding or Editing O Generator Calibration Points131
Deleting O Generator Calibration Points132
Turning O Generator Calibration Points on / off133
Performing an Automatic Calibration of the Ogenerator134
Calibrating Gas Pressure Sensors135
Gas Pressure Sensor Calibration Set up135
Figure 6-1: Set up for Verifying Optional O Figure 6-2: Set up for Verifying Optional O Figure 6-3: Pressure Calibration Monitor Point - T703135
Table 6-1: T703/T703U Pressure Sensors135
Figure 6-4: Pressure Calibration Monitor Points - T703U136
Figure 6-5: Pressure Regulator Monitor Connection Point (T703 and T703U)136
Calibrating the Pressure Sensors137
Figure 6-6: O 3 Regulator Pressure Monitor Point (T703U Only)137
Gas Flow Calibration138
Table 6-2: T703/T703U Gas Pressure to Output Flow Conversion Table139
Calibrating the Photometer"S Sample Gas Flow140
Calibrating the Output Gas Flow141
Output Gas Flow Set up141
Figure 6-7: Output Flow Calibration Monitor Point - T703141
Performing an Output Gas Flow Calibration142
Maintenance Schedule & Procedures143
Maintenance Schedule143
Table 7-1: T703 Maintenance Schedule145
Performing Leak Checks147
Pressure Leak Check147
Figure 7-1: T703 Pneumatic Setup for Performing Pressure Leak Checks148
Figure 7-2: T703U Pneumatic Setup for Performing Pressure Leak Checks148
Cleaning or Replacing the Absorption Tube149
Rebuilding the Dry Air Pump149
Photometer UV Source Lamp Adjustment150
Photometer UV Source Lamp Replacement152
Figure 7-3: Photometer - Location of UV Detector Gain Adjustment & UV Lamp Set Screw152
Adjustment or Replacement of Ozone Generator UV Lamp153
Figure 7-4: Generator Temperature Thermistor and DC Heater Locations153
General Troubleshooting & Service155
General Troubleshooting155
Fault Diagnosis with WARNING Messages156
Table 8-1: Front Panel Warning Messages158
Fault Diagnosis with Test Functions159
Table 8-2: Test Functions - Indicated Failures159
Using the Diagnostic Signal I/O Function160
Figure 8-1: Example of Signal I/O Function161
Using the Analog Output Test Channel162
Table 8-3: Test Channel Outputs as Diagnostic Tools162
Using the Internal Electronic Status Leds163
CPU Status Indicator163
Relay PCA Status Leds163
I 2 C Bus Watchdog Status Leds163
Figure 8-2: CPU Status Indicator163
Table 8-4: Relay PCA Watchdog LED Failure Indications163
Troubleshooting with Relay Board Status Leds164
Figure 8-3: Relay PCA Status Leds Used for Troubleshooting164
Table 8-5: Relay PCA Status LED Failure Indications164
Subsystem Checkout165
Verify Subsystem Calibration165
AC Main Power165
DC Power Supply165
Figure 8-4: Location of DC Power Test Points on Relay PCA166
Table 8-6: DC Power Test Point and Wiring Color Codes166
Table 8-7: DC Power Supply Acceptable Levels166
I 2 C Bus167
Touchscreen Interface167
LCD Display Module167
Relay PCA167
Photometer Ogenerator Pressure /Flow Sensor Assembly168
Table 8-8: Relay PCA Control Devices168
Motherboard170
A/D Functions170
Test Channel / Analog Outputs Voltage171
Status Outputs172
Table 8-9: Analog Output Test Function - Nominal Values Voltage Outputs172
Table 8-10: Status Outputs Check172
Control Inputs173
Control Outputs173
Table 8-11: T703 Control Input Pin Assignments and Corresponding Signal I/O Functions173
Table 8-12: Control Outputs Pin Assignments and Corresponding Signal I/O Functions Check173
Cpu174
Communications174
General RS-232 Troubleshooting174
Troubleshooting Calibrator/Modem or Terminal Operation175
Temperature Problems175
Box / Chassis Temperature175
Photometer Sample Chamber Temperature175
UV Lamp Temperature176
Ozone Generator Temperature176
Troubleshooting the Ophotometer176
Dynamic Problems with the O176
Photometer176
Slow Response to Changes in Concentration177
Noisy or Unstable O Readings at Zero177
Noisy, Unstable, or Non-Linear Span O Readings177
The Analog Output Signal Level Does Not Agree with Front Panel Readings177
Cannot Zero178
Cannot Span178
Checking Measure / Reference Valve178
Trouble Shooting the Ogenerator178
Troubleshooting the Ogenerator in the T703179
Troubleshooting the Ogenerator in the T703U179
Repair Procedures180
Repairing Sample Flow Control Assembly180
Disk-On-Module Replacement Procedure180
Figure 8-5: Critical Flow Restrictor Assembly Disassembly180
Faq"S182
Technical Assistance182
Principles of Operation183
Pneumatic Operation183
Gas Flow Control183
Photometer Critical Flow Orifice184
Internal Gas Pressure Sensors184
Electronic Operation185
Overview185
Figure 9-3: Electronic Block Diagram185
Central Processing Unit (CPU)186
Figure 9-4: CPU Board Annotated186
Disk on Module (DOM)187
Flash Chip187
Relay PCA187
Valve Control188
Figure 9-5: Relay Board PCA with AC Relay Retainer Removed188
Heater Control189
Relay PCA Status Leds and Watch Dog Circuitry189
Figure 9-6: Heater Control Loop Block Diagram189
Figure 9-7: Status LED Locations - Relay PCA189
Relay PCA Watchdog Indicator (D1)190
Table 9-1: Relay Board Status Leds190
Motherboard191
A to D Conversion191
Sensor Inputs191
Thermistor Interface191
Analog Outputs191
External Digital I/O192
I 2 C Data Bus192
Power-Up Circuit192
Power Supply and Circuit Breaker192
AC Power Configuration194
Figure 9-8: Power Distribution Block Diagram194
AC Configuration - Internal Pump (JP7)195
Figure 9-9: Location of the AC Configuration Jumper for the Dry Air Pump195
Table 9-2: AC Power Configuration for Internal Pumps (JP7)195
Front Panel Touchscreen/Display Interface196
Figure 9-10: Pump AC Power Jumpers (JP7)196
Front Panel Interface PCA197
Software Operation197
Figure 9-11: Front Panel Layout197
Ogenerator Operation198
Principle of Photolytic O198
Generation198
Figure 9-12: Schematic of Basic Software Operation198
Figure 9-13: O199
Generator Pneumatic Operation200
O 3 Generator Electronic Operation200
O 3 Generator Temperature Control202
Photometer Operation202
Measurement Method202
Calculating O Concentration202
Figure 9-17: O202
Generator Temperature Thermistor and DC Heater Locations202
The Measurement / Reference Cycle204
Table 9-3: Photometer Measurement / Reference Cycle204
Figure 9-18: T703 O Photometer Gas Flow - Measure Cycle205
Figure 9-19: T703 O Photometer Gas Flow - Reference Cycle205
The Absorption Path206
Figure 9-20: T703U O3 Photometer Gas Flow - Measure Cycle206
Figure 9-21: T703U O Photometer Gas Flow - Reference Cycle206
Interferent Rejection207
Photometer Layout207
Figure 9-22: O207
Photometer Pneumatic Operation208
Photometer Layout - Top Cover Removed208
Photometer Electronic Operation209
O 3 Photometer Temperature Control209
Photometer Electronic Block Diagram209
Pneumatic Sensors for the O Photometer210
Figure 9-23: O225
Figure 9-24: O225

TELEDYNE API T703U - Principles of Operation; Pneumatic Operation; Gas Flow Control

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