Teledyne 703E User Manual

OPERATOR’S MANUAL

MODEL 703E

PHOTOMETRIC O3 CALIBRATOR

© TELEDYNE INSTRUMENTS

ADVANCED POLLUTION INSTRUMENTATION DIVISION (TAPI)

9480 CARROLL PARK DRIVE

SAN DIEGO, CALIFORNIA 92121-5201

USA

Toll-free Phone:	800-324-5190
Phone:	858-657-9800
Fax:	858-657-9816
Email:	[e-mail]
Website:	http://www.teledyne-api.com/

	05743 Rev. C
Copyright 2007	DCN 5521
Teledyne Advanced Pollution Instrumentation	29 July 2009

THIS PAGE IS INTENTIONALLY LEFT BLANK

PRINTED DOCUMENTS ARE UNCONTROLLED.

We recommend that this document be read in its entirety before any attempt is made to operate the instrument.

DOCUMENTS

Document P/N	Revision	DCN	Nomenclature	Dated
05743	B	5359	M703, Manual, Instruction - Title	03/20/09
05744	B	5359	M703, Manual, Instruction - Text	03/20/09
05745	C	5359	M703, Appendix A, Menu Tree	03/20/09
05746	B	5359	M703, Appendix B, Spare Parts	03/20/09
05747	B	5359	M703, Appendix C, Repair Form	03/20/09
05748	B	5359	M703, Appendix D, Schematics	03/20/09
05834	F	5359	List, Spare Parts, M703	03/20/09
05863	B	5359	List, Recommended Spares Stocking Levels,	03/20/09
			M703
05834	J	5480	List, Spare Parts, M703	07/15/09
05863	D	5480	List, Recommended Spares Stocking Levels,	07/15/09
			M703

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	TELEDYNE API
M703E Calibrator Operator’s Manual	Safety Messages

SAFETY MESSAGES

Your safety and the safety of others are very important. We have provided many important safety messages in this manual. Please read these messages carefully.

A safety message alerts you to potential hazards that could hurt you or others. Each safety message is associated with a safety alert symbol. These symbols are found in the manual and inside the M703E Photometric O3 Calibrator. The definition of these symbols is described below:

GENERAL SAFETY HAZARD: Refer to the instructions for details on the specific hazard.

CAUTION: Hot Surface Warning.

CAUTION: Electrical Shock Hazard.

TECHNICIAN SYMBOL: All operations marked with this symbol are to be performed by qualified maintenance personnel only.

CAUTION

The M703E Photometric O3 Calibrator should only be used for the purpose and in the manner described in this manual. If you use the M703E in a manner other than that for which it was intended, unpredictable behavior could ensue with possible hazardous consequences.

NOTE

Technical Assistance regarding the use and maintenance of the M703E or any other Teledyne Instruments product

can be obtained by:

Contacting Teledyne Instruments’ Customer Service Department at 800-324-5190 or

Via the internet at http://www.teledyne-api.com/forms

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Safety Messages	M703E Dynamic Operator’s Manual

USER NOTES:

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	TELEDYNE API
M703E Calibrator Operator’s Manual	Table of Contents
TABLE OF CONTENTS
GENERAL INFORMATION.......................................................................................................	1
1. INTRODUCTION ..................................................................................................................	3
1.1. M703E calibrator Overview............................................................................................................................	3
1.2. Using This Manual .........................................................................................................................................	3
2. SPECIFICATIONS, APPROVALS AND WARRANTY .........................................................	5
2.1. Specifications .................................................................................................................................................	5
2.2. CE Mark Compliance .....................................................................................................................................	6
2.3. Warranty.........................................................................................................................................................	7
3. GETTING STARTED ............................................................................................................	9
3.1. Unpacking and Initial Setup ...........................................................................................................................	9
3.1.1. Model 703E calibrator............................................................................................................................	10
3.2. Electrical Connections .................................................................................................................................	13
3.2.1. Power Connection..................................................................................................................................	13
3.2.2. Analog output TEST CHANNEL Connections .......................................................................................	13
3.2.3. Connecting the Status Outputs..............................................................................................................	14
3.2.4. Connecting the Control Inputs ...............................................................................................................	15
3.2.5. Connecting the Control Outputs ............................................................................................................	17
3.2.6. Connecting the Serial Ports ...................................................................................................................	18
3.2.7. Connecting to a LAN or the Internet ......................................................................................................	18
3.2.8. Connecting to a Multidrop Network........................................................................................................	18
3.3. Pnenumatic Connections .............................................................................................................................	19
3.3.1. Dry Air In ................................................................................................................................................	19
3.3.2. Zero Air In ..............................................................................................................................................	19
3.3.3. Output Manifold......................................................................................................................................	20
3.3.4. Exhaust ..................................................................................................................................................	20
3.3.5. Measuring An External Ozone Source ..................................................................................................	20
3.4. Initial Operation............................................................................................................................................	21
3.4.1. START-UP .............................................................................................................................................	21
3.4.2. Warm Up................................................................................................................................................	22
3.4.3. Warning Messages ................................................................................................................................	22
3.4.4. Functional Check ...................................................................................................................................	24
3.4.5. Operating Modes for the O3 Generator..................................................................................................	25
3.4.5.1. CNST (CONSTANT).......................................................................................................................	25
3.4.5.2. REF (REFERENCE).......................................................................................................................	25
3.4.5.3. BNCH (BENCH) .............................................................................................................................	25
3.4.6. Setting the O3 Generator Mode.............................................................................................................	25
3.4.7. Setting the M703E’s output Flow Rate ..................................................................................................	26
4. FREQUENTLY ASKED QUESTIONS AND GLOSSARY ..................................................	27
4.1. FAQ’s ...........................................................................................................................................................	27
4.2. Glossary .......................................................................................................................................................	27
5. OPTIONAL HARDWARE AND SOFTWARE.....................................................................	29
5.1. Carrying Strap Handle (OPT 29)..................................................................................................................	29
5.2. Communication Options...............................................................................................................................	30
5.2.1. RS232 Modem Cables (OPTs 60 and 60A) ..........................................................................................	30
5.2.2. ETHERNET Cable (OPT 60B)...............................................................................................................	30
5.2.3. RS-232 Multidrop (OPT 62) ...................................................................................................................	30
5.2.4. Ethernet (OPT 63)..................................................................................................................................	31
5.2.5. Ethernet + Multidrop (OPT 64)...............................................................................................................	32
5.3. Additional Manual (OPT 70).........................................................................................................................	32
5.4. Extended Warranty (OPT 92) ......................................................................................................................	32
5.5. NIST Traceable, Primary Standard CERTIFICATION .................................................................................	32
OPERATING INSTRUCTIONS................................................................................................	33
6. OPERATING THE M703E CALIBRATOR .........................................................................	35
6.1. Test Functions..............................................................................................................................................	36

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6.2. Overview of Operating modes .....................................................................................................................		37
6.3. STANDBY Mode ..........................................................................................................................................		38
6.4. General Information about the GENERATE mode ......................................................................................		39
6.4.1. GENERATE  AUTO: Basic Generation of Calibration Gas................................................................		39
6.5. AUTOMATIC CALIBRATION SEQUENCES ...............................................................................................		40
6.5.1. SETUP  SEQ: Programming Calibration Sequences.........................................................................		40
6.5.1.1. Activating a Sequence from the M703E Front Panel .....................................................................		41
6.5.1.2. Naming a Sequence.......................................................................................................................		42
6.5.1.3. Setting the Repeat Count for a Sequence .....................................................................................		43
6.5.1.4. Using the M703E’s Internal Clock to Trigger Sequences...............................................................		44
6.5.1.5. Setting Up Control Inputs for a Sequence......................................................................................		47
6.5.1.6. Setting Up Control Outputs for a Sequence...................................................................................		48
6.5.1.7. Setting the PROGRESS Reporting Mode for the Sequences........................................................		49
6.5.2. Adding Sequence Steps ........................................................................................................................		50
6.5.2.1. The Generate Step .........................................................................................................................		51
6.5.2.2. The STANDBY Step.......................................................................................................................		52
6.5.2.3. The DURATION Step .....................................................................................................................		52
6.5.2.4. The EXECSEQ Step.......................................................................................................................		53
6.5.2.5. The CC OUTPUT Step...................................................................................................................		54
6.5.2.6. Deleting or Editing an Individual Step in a Sequence ....................................................................		55
6.5.3. Deleting a Sequence .............................................................................................................................		56
6.6. SETUP  CFG ............................................................................................................................................		57
6.7. SETUP  CLK.............................................................................................................................................		58
6.7.1. Setting the internal Clock’s Time and Day.............................................................................................		58
6.7.2. Adjusting the internal Clock’s speed......................................................................................................		59
6.8. SETUP  PASS ..........................................................................................................................................		60
6.9. SETUP  DIAG  TEST CHAN OUTPUT: Using the TEST Channel Analog Output...............................		62
6.9.1. Configuring the TEST CHANNEL Analog Output..................................................................................		62
6.9.1.1. The Analog I/O Configuration Submenu. .......................................................................................		62
6.9.1.2. Selecting a Test Channel Function to Output ................................................................................		64
6.9.1.3. TEST CHANNEL VOLTAGE RANGE Configuration......................................................................		66
6.9.1.4. Turning the TEST CHANNEL Over-Range Feature ON/OFF........................................................		67
6.9.1.5. Adding a Recorder Offset to the TEST CHANNEL ........................................................................		68
6.9.2. TEST CHANNEL CALIBRATION ..........................................................................................................		69
6.9.2.1. Enabling or disabling the TEST CHANNEL Auto-Cal Feature.......................................................		69
6.9.2.2. Automatic TEST CHANNEL Calibration.........................................................................................		70
6.9.2.3. Manual Calibration of the TEST CHANNEL configured for Voltage Ranges .................................		72
6.9.3. AIN Calibration.......................................................................................................................................		74
6.10. SETUP  MORE  VARS: Internal Variables (VARS)............................................................................		75
6.11. Operating the M703E Calibrator as an O3 Photometer .............................................................................		77
6.11.1. Set up for Operating the M703E as an O3 Photometer .......................................................................		77
6.12. SETUP  LVL: Setting up and using LEADS (Dasibi) Operating Levels .................................................		79
6.12.1. General Information about LEADS LEVELS .......................................................................................		79
6.12.2. Dot commands.....................................................................................................................................		79
6.12.3. Levels...................................................................................................................................................		80
6.12.4. Activating an existing LEVEL...............................................................................................................		80
6.12.5. Programming New LEVELS ................................................................................................................		81
6.12.5.1. Creating a GENERATE LEVEL....................................................................................................		82
6.12.5.2. Creating a MANUAL LEVEL.........................................................................................................		83
6.12.5.3. Editing or Deleting a LEVEL.........................................................................................................		84
6.12.6. Configuring LEVEL Status Blocks .......................................................................................................		86
7. OPERATING THE M703E OVER THE SERIAL I/O PORTS..............................................		87
7.1. Using the Analyser’s Communication Ports.................................................................................................		87
7.1.1. RS-232 DTE and DCE Communication.................................................................................................		87
7.1.2. COMM Port Default Settings and Connector Pin Assignments.............................................................		88
7.1.3. COMM Port Baud Rate..........................................................................................................................		90
7.1.4. COMM Port Communication Modes ......................................................................................................		91
7.1.5. COMM Port Testing ...............................................................................................................................		93
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7.1.6. Machine ID	.............................................................................................................................................	94
7.1.7. Terminal Operating Modes ....................................................................................................................		95
7.1.7.1. Help Commands in Terminal Mode................................................................................................		95
7.1.7.2. Command Syntax ...........................................................................................................................		96
7.1.7.3. Data Types .....................................................................................................................................		96
7.1.7.4. Status Reporting.............................................................................................................................		97
7.1.7.5. COM Port Password Security.........................................................................................................		98
7.2. Remote Access by Modem ..........................................................................................................................		99
7.3. Multidrop RS-232 Set Up ..........................................................................................................................		101
7.4. RS-485 Configuration of COM2 ................................................................................................................		103
7.5. Remote Access via the Ethernet...............................................................................................................		105
7.5.1. Ethernet Card COM2 Communication Modes and Baud Rate...........................................................		105
7.5.2. Configuring the Ethernet Interface Option using DHCP .....................................................................		105
7.5.2.1. Manually Configuring the Network IP Addresses........................................................................		108
7.5.3. Changing the Calibrator’s HOSTNAME..............................................................................................		110
7.6. APICOM Remote Control Program...........................................................................................................		111
8. M703E CALIBRATION AND VERIFICATION..................................................................		113
8.1. Verifying and Calibrating the M703E’s O3 Photometer.............................................................................		113
8.1.1. Setup for VERIFYING AND calibrating the O3 Photometer................................................................		113
8.1.1.1. Calibration Manifold Exhaust/Vent Line ......................................................................................		114
8.1.2. Verifying O3 Photometer Performance ...............................................................................................		115
8.1.3. Calibrating the O3 Photometer............................................................................................................		116
8.1.3.1. Photometer Zero Calibration .......................................................................................................		116
8.1.3.2. Photometer Span Calibration ......................................................................................................		117
8.1.4. O3 Photometer Dark Calibration .........................................................................................................		118
8.2. Calibrating the O3 Generator ....................................................................................................................		119
8.2.1. O3 Generator Calibration table...........................................................................................................		119
8.2.2. Viewing O3 Generator Calibration Points............................................................................................		120
8.2.3. Adding or Editing O3 Generator Calibration Points.............................................................................		121
8.2.4. Deleting O3	Generator Calibration Points ...........................................................................................	122
8.2.5. Turning O3	Generator Calibration Points ON / OFF ...........................................................................	123
8.2.6. Performing an Automatic Calibration of the O3 Generator .................................................................		124
8.3. M703E Gas Pressure Sensor Calibration.................................................................................................		125
8.3.1.1. Gas Pressure Sensor Calibration Set Up....................................................................................		125
8.3.2. Calibrating the Regulator and Photometer Pressure Sensors ...........................................................		127
8.4. M703E Gas Flow Calibration ....................................................................................................................		128
8.4.1. Calibrating the Photometer’s Sample Gas Flow.................................................................................		129
8.4.2. Calibrating the OuTput Gas Flow .......................................................................................................		130
8.4.2.1. Output Gas Flow Set Up .............................................................................................................		130
8.4.2.2. Performing an Output Gas Flow Calibration ...............................................................................		131
TECHNICAL INFORMATION................................................................................................		133
9. THEORY OF OPERATION...............................................................................................		135
9.1. Pneumatic Operation ................................................................................................................................		135
9.1.1. Gas Flow Control ................................................................................................................................		135
9.1.1.1. Flow Control Assemblies.............................................................................................................		135
9.1.1.2. Photometer Critical Flow Orifice..................................................................................................		135
9.1.2. Internal Gas Pressure Sensors...........................................................................................................		136
9.2. Electronic Operation .................................................................................................................................		137
9.2.1. Overview .............................................................................................................................................		137
9.2.2. CPU ....................................................................................................................................................		138
9.2.2.1. Disk On Chip ...............................................................................................................................		139
9.2.2.2. Flash Chip ...................................................................................................................................		139
9.2.3. Relay PCA	..........................................................................................................................................	140
9.2.3.1. Valve Control ...............................................................................................................................		141
9.2.3.2. Heater Control .............................................................................................................................		141
9.2.3.3. Relay PCA Status LEDs & Watch Dog Circuitry .........................................................................		141
9.2.3.4. Relay PCA Watchdog Indicator (D1)...........................................................................................		142

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9.2.4. Motherboard........................................................................................................................................		143
9.2.4.1. A to D Conversion .......................................................................................................................		143
9.2.4.2. Sensor Inputs ..............................................................................................................................		143
9.2.4.3. Thermistor Interface ....................................................................................................................		143
9.2.4.4. Analog Outputs............................................................................................................................		143
9.2.4.5. External Digital I/O.......................................................................................................................		144
9.2.4.6. I2C Data Bus................................................................................................................................		144
9.2.4.7. Power-up Circuit ..........................................................................................................................		144
9.2.5. Power Supply and Circuit Breaker......................................................................................................		145
9.2.6. AC Power Configuration .....................................................................................................................		146
9.2.6.1. AC configuration – Internal Pump (JP7)......................................................................................		146
9.3. Front Panel Interface ................................................................................................................................		147
9.3.1.1. Calibrator Status LEDs................................................................................................................		148
9.3.1.2. Keyboard .....................................................................................................................................		148
9.3.1.3. Display.........................................................................................................................................		148
9.3.1.4. Keyboard/Display Interface Electronics.......................................................................................		149
9.4. Software Operation ...................................................................................................................................		150
9.5. O3 generator operation.............................................................................................................................		151
9.5.1. Principle of Photolytic O3 Generation .................................................................................................		151
9.5.2. Generator Pneumatic Operation.........................................................................................................		152
9.5.3. O3 Generator Electronic Operation .....................................................................................................		152
9.5.3.1. O3 Generator Temperature Control.............................................................................................		154
9.6. Photometer Operation...............................................................................................................................		155
9.6.1. Measurement Method.........................................................................................................................		155
9.6.1.1. Calculating O3 Concentration ......................................................................................................		155
9.6.1.2. The Measurement / Reference Cycle..........................................................................................		156
9.6.1.3. The Absorption Path....................................................................................................................		158
9.6.1.4. Interferent Rejection ....................................................................................................................		158
9.6.2. Photometer Layout..............................................................................................................................		159
9.6.3. Photometer Pneumatic Operation ......................................................................................................		159
9.6.4. Photometer Electronic Operation........................................................................................................		160
9.6.4.1. O3 Photometer Temperature Control ..........................................................................................		160
9.6.4.2. Pneumatic Sensors for the O3 Photometer .................................................................................		161
10. MAINTENANCE SCHEDULE & PROCEDURES ..........................................................		163
10.1. Maintenance Schedule ...........................................................................................................................		163
10.2. Performing Leak Checks ........................................................................................................................		167
10.2.1. Pressure Leak Check .......................................................................................................................		167
10.3. Cleaning or replacing the Absorption Tube ............................................................................................		171
10.4. Rebuilding the Dry Air Pump ..................................................................................................................		171
10.5. Photometer UV Source Lamp Adjustment..............................................................................................		172
10.6. Photometer UV Source Lamp Replacement ..........................................................................................		173
10.7. Adjustment or Replacement of Ozone Generator UV Lamp ..................................................................		174
11. GENERAL TROUBLESHOOTING & REPAIR OF THE M703E CALIBRATOR ...........		177
11.1. General Troubleshooting ........................................................................................................................		177
11.1.1. Fault Diagnosis with WARNING Messages......................................................................................		178
11.1.2. Fault Diagnosis With Test Functions ................................................................................................		180
11.1.3. Using the Diagnostic Signal I/O Function .........................................................................................		182
11.2. Using the Analog Output Test Channel ..................................................................................................		183
11.3. Using the Internal Electronic Status LEDs..............................................................................................		184
11.3.1. CPU Status Indicator ........................................................................................................................		184
11.3.2. Relay PCA Status LEDs ...................................................................................................................		184
11.3.2.1. I2C Bus Watchdog Status LEDs ................................................................................................		184
11.3.2.2. O3 Status LEDs .........................................................................................................................		185
11.4. Subsystem Checkout..............................................................................................................................		186
11.4.1. Verify Subsystem Calibration............................................................................................................		186
11.4.2. AC Main Power .................................................................................................................................		186
11.4.3. DC Power Supply..............................................................................................................................		187

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11.4.4. I2C Bus ..............................................................................................................................................		188
11.4.5. Keyboard/Display Interface...............................................................................................................		188
11.4.6. Relay PCA ........................................................................................................................................		189
11.4.7. PHOTOMETER O3 Generator Pressure /FLOW SENSOR Assembly ............................................		189
11.4.8. Motherboard......................................................................................................................................		191
11.4.8.1. A/D Functions ............................................................................................................................		191
11.4.8.2. Test Channel / Analog Outputs Voltage....................................................................................		191
11.4.8.3. Status Outputs...........................................................................................................................		192
11.4.8.4. Control Inputs ............................................................................................................................		193
11.4.8.5. Control Outputs .........................................................................................................................		194
11.4.9. CPU ..................................................................................................................................................		194
11.4.10. RS-232 Communications................................................................................................................		195
11.4.10.1. General RS-232 Troubleshooting............................................................................................		195
11.4.10.2. Troubleshooting Calibrator/Modem or Terminal Operation.....................................................		195
11.4.11. Temperature Problems ...................................................................................................................		196
11.4.11.1. Box / Chassis Temperature.....................................................................................................		196
11.4.11.2. Photometer Sample Chamber Temperature ...........................................................................		196
11.4.11.3. UV Lamp Temperature............................................................................................................		196
11.4.11.4. Ozone Generator Temperature ...............................................................................................		197
11.5. Troubleshooting the O3 photometer........................................................................................................		197
11.5.1. Dynamic Problems with the O3 photometer......................................................................................		197
11.5.1.1. Noisy or Unstable O3 Readings at Zero ....................................................................................		197
11.5.1.2. Noisy, Unstable, or Non-Linear Span O3 Readings ..................................................................		198
11.5.1.3. Slow Response to Changes in Concentration...........................................................................		198
11.5.1.4. The Analog Output Signal Level Does Not Agree With Front Panel Readings.........................		198
11.5.1.5. Cannot Zero...............................................................................................................................		198
11.5.1.6. Cannot Span..............................................................................................................................		198
11.5.2. Checking Measure / REFERENCE VALVE......................................................................................		199
11.6. Troubleshooting the O3 Generator..........................................................................................................		200
11.6.1. Checking The UV Lamp Power Supply ............................................................................................		200
11.7. Trouble Shooting the Optional O3 generator ..........................................................................................		201
11.7.1. Checking The UV Source Lamp Power Supply................................................................................		201
11.8. Repair Procedures..................................................................................................................................		202
11.8.1. Repairing Sample Flow Control Assembly .......................................................................................		202
11.8.2. Disk-On-Chip Replacement Procedure ............................................................................................		203
11.9. Technical Assistance ..............................................................................................................................		203
12. A PRIMER ON ELECTRO-STATIC DISCHARGE.........................................................		205
12.1. How Static Charges are Created............................................................................................................		205
12.2. How Electro-Static Charges Cause Damage .........................................................................................		206
12.3. Common Myths About ESD Damage .....................................................................................................		207
12.4. Basic Principles of Static Control............................................................................................................		207
12.4.1. General Rules ...................................................................................................................................		207
12.4.2. Basic anti-ESD Procedures for Analyzer Repair and Maintenance .................................................		209
12.4.2.1. Working at the Instrument Rack ................................................................................................		209
12.4.2.2. Working at an Anti-ESD Work Bench........................................................................................		209
12.4.2.3. Transferring Components from Rack to Bench and Back.........................................................		210
12.4.2.4. Opening Shipments from Teledyne Instruments Customer Service. ........................................		210
12.4.2.5. Packing Components for Return to Teledyne Instruments Customer Service..........................		211

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LIST OF FIGURES
Figure 3-1:	M703E Front Panel Layout ................................................................................................................			10
Figure 3-2:	M703E Rear Panel Layout.................................................................................................................			10
Figure 3-3:	M703E Internal Layout – Top View ...................................................................................................			11
Figure 3-4:	M703E Pneumatic Diagram...............................................................................................................			12
Figure 3-5:	M703E the TEST CHANNEL Connector ...........................................................................................			13
Figure 3-6:	Status Output Connector ...................................................................................................................			14
Figure 3-7:	M703E Digital Control Input Connectors ...........................................................................................			16
Figure 3-8:	M703E Digital Control Output Connector ..........................................................................................			17
Figure 3-9:	Basic Pneumatic Setup of M703E .....................................................................................................			19
Figure 3-10:	Location of Pressure Regulator Adjustment Knob.............................................................................			26
Figure 5-1:	M703E with Carrying Strap Handle and Rack Mount Brackets.........................................................			29
Figure 5-1:	M703E Multidrop Card.......................................................................................................................			30
Figure 5-2:	M703E Ethernet Card ........................................................................................................................			31
Figure 5-3:	M703E Rear Panel with Ethernet Installed........................................................................................			31
Figure 6-1:	Front Panel Display ...........................................................................................................................			37
Figure 6-2:	M703E the TEST CHANNEL Connector ...........................................................................................			62
Figure 6-3:	Setup for Calibrating the TEST CHANNEL .......................................................................................			72
Figure 6-4:	Set up for Using the M703E to Measure an External O3 Source ......................................................			77
Figure 6-5:	LEADS Level Display Format ............................................................................................................			85
Figure 7-1:	Default Pin Assignments for Back Panel COMM Port connectors (RS-232 DCE & DTE) ................			88
Figure 7-2:	Default Pin Assignments for CPU COM Port connector (RS-232)....................................................			88
Figure 7-3:	Location of JP2 on RS232-Multidrop PCA (option 62) ...................................................................			101
Figure 7-4:	RS232-Multidrop PCA Host/Calibrator Interconnect Diagram........................................................			102
Figure 7-5:	CPU card Locations of RS-232/485 Switches, Connectors and Jumpers......................................			103
Figure 7-6:	Back Panel connector Pin-Outs for COM2 in RS-485 mode..........................................................			104
Figure 7-7:	CPU connector Pin-Outs for COM2 in RS-485 mode.....................................................................			104
Figure 7-8:	APICOM Remote Control Program Interface .................................................................................			111
Figure 8-1:	Set up for Verifying Optional O3 Photometer Using Internal O3 Generator ....................................			114
Figure 8-2:	Set up for Verifying Optional O3		Photometer Using an External O3 Generator..............................	114
Figure 8-3:	Pressure Calibration Monitor Points ...............................................................................................			125
Figure 8-4:	O3 Generator Pressure Monitor Point Physical Location– M703E .................................................			126
Figure 8-5:	Output Flow Calibration Monitor Point............................................................................................			130
Figure 9-1:	Location of Gas Flow Control Assemblies......................................................................................			135
Figure 9-2:	M703E Electronic Block Diagram ...................................................................................................			137
Figure 9-3:	M703E CPU Board Annotated........................................................................................................			138
Figure 9-4:	Relay Board PCA with AC Relay Retainer Removed.....................................................................			140
Figure 9-5:	Heater Control Loop Block Diagram...............................................................................................			141
Figure 9-6:	Status LED Locations – Relay PCA ...............................................................................................			141
Figure 9-7:	M703E Power Distribution Block diagram ......................................................................................			145
Figure 9-8: Location of the AC Configuration Jumper for the Dry Air Pump....................................................				146
Figure 9-9: Pump AC Power Jumpers (JP7)....................................................................................................				147
Figure 9-10:	M703E Front Panel Layout .............................................................................................................			147
Figure 9-11:	Keyboard and Display Interface Block Diagram .............................................................................			149
Figure 9-12:	Schematic of Basic Software Operation .........................................................................................			150
Figure 9-13:	O3	Generator Internal Pneumatics..................................................................................................		151
Figure 9-14:	O3	Generator Valve and Gas Fixture Locations .............................................................................		152
Figure 9-15:	O3	Generator Electronic Block Diagram .........................................................................................		153
Figure 9-16:	O3	Generator Electronic Components Location .............................................................................		153
Figure 9-17:	O3	Generator Temperature Thermistor and DC Heater Locations.................................................		154
Figure 9-18:	O3	Photometer Gas Flow – Measure Cycle....................................................................................		157
Figure 9-19:	O3	Photometer Gas Flow – Reference Cycle .................................................................................		157
Figure 9-20:	O3	Photometer Absorption Path	.....................................................................................................	158
Figure 9-21:	O3	Photometer Layout – Top Cover Removed...............................................................................		159
Figure 9-22:	O3	Photometer Electronic Block Diagram.......................................................................................		160
Figure 10-2:	Pneumatic setup for performing Pressure Leak Checks ................................................................			170
Figure 10-3: Photometer – Location of UV Detector Gain Adjustment & UV Lamp Set Screw ...........................				173

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Figure 10-4: O3 Generator Temperature Thermistor and DC Heater Locations		................................................. 174
Figure 10-5: Location of O3 Generator Reference Detector Adjustment Pot......................................................		174
Figure 11-1: Example of Signal I/O Function ......................................................................................................		182
Figure 11-2: CPU Status Indicator ......................................................................................................................		184
Figure 11-3: Relay PCA Status LEDS Used for Troubleshooting.......................................................................		185
Figure 11-4: Location of DC Power Test Points on Relay PCA ..........................................................................		187
Figure 11-5: Critical Flow Restrictor Assembly Disassembly..............................................................................		202
Figure 12-1:	Triboelectric Charging.....................................................................................................................	205
Figure 12-2:	Basic anti-ESD Work Station ..........................................................................................................	207

LIST OF TABLES
Table 2-1:	M703E Analytical Specifications..........................................................................................................	5
Table 2-2:	M703E Electrical and Physical Specifications .....................................................................................	5
Table 2-3:	M703E Specifications for Ozone Generator ........................................................................................	6
Table 2-4:	M703E Specifications for O3 Photometer ............................................................................................	6
Table 3-1:	Status Output Pin Assignments.........................................................................................................	14
Table 3-2:	M703E Control Input Pin Assignments..............................................................................................	15
Table 3-3:	M703E Control Input Pin Assignments..............................................................................................	17
Table 3-4:	Front Panel Display during System Warm-Up...................................................................................	22
Table 3-5:	Possible Warning Messages at Start-Up...........................................................................................	23
Table 6-1:	Test Functions Defined......................................................................................................................	36
Table 6-2:	Calibrator Operating Modes...............................................................................................................	37
Table 6-3:	Automatic Calibration SEQUENCE Set Up Attributes .......................................................................	40
Table 6-4:	Calibration SEQUENCE Step Instruction ..........................................................................................	40
Table 6-5:	Sequence Progress Reporting Mode ................................................................................................	49
Table 6-6:	Password Levels................................................................................................................................	60
Table 6-7:	DIAG - Analog I/O Functions .............................................................................................................	62
Table 6-8:	Test Channels Functions Available on the M703E’s Analog Output.................................................	64
Table 6-9:	Analog Output Voltage Range Min/Max ............................................................................................	66
Table 6-10:	Voltage Tolerances for the TEST CHANNEL Calibration..................................................................	72
Table 6-11:	Variable Names (VARS) ....................................................................................................................	75
Table 7-1:	COMM Port Communication Modes..................................................................................................	91
Table 7-2:	Terminal Mode Software Commands ................................................................................................	95
Table 7-3:	Teledyne Instruments Serial I/O Command Types............................................................................	96
Table 7-4:	Ethernet Status Indicators ..............................................................................................................	105
Table 7-5:	LAN/Internet Configuration Properties............................................................................................	106
Table 8-1:	M703E Pressure Sensors...............................................................................................................	125
Table 8-2:	M703E Gas Pressure to Output Flow conversion Table ................................................................	128
Table 9-1:	Relay Board Status LEDs ...............................................................................................................	142
Table 9-2:	AC Power Configuration for Internal Pumps (JP7) .........................................................................	146
Table 9-3:	Front Panel Status LEDs ................................................................................................................	148
Table 9-4:	M703E Photometer Measurement / Reference Cycle....................................................................	156
Table 10-1:	M703E Maintenance Schedule.......................................................................................................	165
Table 11-1:	Front Panel Warning Messages .....................................................................................................	179
Table 11-2:	Test Functions - Indicated Failures ................................................................................................	180
Table 11-3:	Test Channel Outputs as Diagnostic Tools ....................................................................................	183
Table 11-4:	Relay PCA Watchdog LED Failure Indications...............................................................................	184
Table 11-5:	Relay PCA Status LED Failure Indications.....................................................................................	185
Table 11-6:	DC Power Test Point and Wiring Color Codes...............................................................................	187
Table 11-7:	DC Power Supply Acceptable Levels .............................................................................................	188
Table 11-8:	Relay PCA Control Devices............................................................................................................	189
Table 11-9:	Analog Output Test Function - Nominal Values Voltage Outputs ..................................................	192
Table 11-10:	Status Outputs Check.....................................................................................................................	192
Table 11-11:	M703E Control Input Pin Assignments and Corresponding Signal I/O Functions .........................	193

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Table 11-12: Control Outputs Pin Assignments and Corresponding Signal I/O Functions Check ......................			194
Table 12-1:	Static Generation Voltages for Typical Activities ............................................................................		205
Table 12-2:	Sensitivity of Electronic Devices to Damage by ESD.....................................................................		206

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LIST OF APPENDICES

APPENDIX A - VERSION SPECIFIC SOFTWARE DOCUMENTATION APPENDIX A-1: Model 703E Software Menu Trees, Revision C.0

APPENDIX A-2: Model 703E Setup Variables Available Via Serial I/O, Revision C.0 APPENDIX A-3: Model 703E Warnings and Test Measurements via Serial I/O, Revision C.0 APPENDIX A-4: Model 703E Signal I/O Definitions, Revision C.0

APPENDIX A-5: Model 703E Terminal Command Designators, Revision C.0 APPENDIX B - Model 703E SPARE PARTS LIST

APPENDIX C - Model 703E REPAIR QUESTIONNAIRE

APPENDIX D - Model 703E ELECTRONIC SCHEMATICS

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SECTION I

–

GENERAL INFORMATION

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M703E Calibrator Operator’s Manual	Introduction

1. INTRODUCTION

1.1. M703E CALIBRATOR OVERVIEW

The Model 703E is a microprocessor-based ozone calibrator for calibration of ambient ozone analyzers, such as the T-API M400E. The M703E features an internal ozone photometer that provides very accurate closed loop feedback control of the ozone concentration.

As many as 50 independent calibration sequences may be programmed into the M703E, covering time periods of up to one year. The setup of sequences is simple and intuitive. These sequences may be actuated manually, automatically, or by a remote signal. The sequences may be uploaded remotely, including remote editing. All programs are maintained in non-volatile memory.

The M703E design emphasizes fast response, repeatability, overall accuracy and ease of operation. It may be combined with the Model 701 Zero Air Generator to provide the ultimate in easy to use, precise calibration for your ozone analyzers.

Some of the exceptional features of your M703E Photometric O3 Calibrator are:

Advanced E Series electronics

Lightweight for transportability

Optional Ethernet connectivity

12 independent timers for sequences

Nested sequences (up to 5 levels)

Internal ozone generator and photometer allows use as primary or transfer standard

1.2. USING THIS MANUAL

NOTE

Throughout this manual, words printed in capital, bold letters, such as SETUP or ENTR represent messages as they appear on the calibrator’s display.

This manual is organized in the following manner:

TABLE OF CONTENTS:

Outlines the contents of the manual in the order the information is presented. This is a good overview of the topics covered in the manual. There is also a list of appendices, figures and tables. In the electronic version of the manual, clicking on any of these table entries automatically views that section.

SECTION I – GENERAL INFORMATION

INTRODUCTION

A brief description of the M703E calibrator architecture as well as a description of the layout of the manual and what information is located in its various sections and chapters.

SPECIFICATIONS AND WARRANTY

Teledyne Instruments’ warranty statement.

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GETTING STARTED

Instructions for setting up, installing and running your calibrator for the first time.

GLOSSARY:

Answers to the most frequently asked questions about operating the calibrator and a glossary of acronyms and technical terms.

OPTIONAL HARDWARE & SOFTWARE

A description of optional equipment to add functionality to your calibrator.

SECTION II – OPERATING INSTRUCTIONS

USING THE M703E CALIBRATOR

Step-by-Step instructions for using the display/keyboard to set up and operate the M703E calibrator.

REMOTE OPERATION OF THE M703E CALIBRATOR

Information and instructions for interacting with the M703E calibrator via its several remote interface options (e.g. via RS-232, Ethernet, its built in digital control inputs/outputs, etc.)

M703E VALIDATION AND VERIFICATION

Methods and procedures for validating and verifying the correct operation of your M703E Photometric O3 Calibrator

SECTION III – TECHNICAL INFORMATION

THEORY OF OPERATION

An in-depth look at the various principals by which your calibrator operates as well as a description of how the various electronic, mechanical and pneumatic components of the calibrator work and interact with each other. A close reading of this section is invaluable for understanding the calibrator’s operation.

MAINTENANCE SCHEDULE AND PROCEDURES

Description of preventative maintenance procedures that should be regularly performed on you calibrator to assure good operating condition.

GENERAL TROUBLESHOOTING & REPAIR OF THE M703E CALIBRATOR

This section includes pointers and instructions for diagnosing problems with the calibrator in general as well as instructions on performing repairs.

A PRIMER ON ELECTRO-STATIC DISCHARGE

This section describes how static electricity occurs; why it is a significant concern and; how to avoid it and avoid allowing ESD to affect the reliable and accurate operation of your calibrator.

APPENDICES

For easier access and better updating, some information has been separated out of the manual and placed in a series of appendices at the end of this manual. These include version-specific software menu trees, warning messages, serial I/O variables as well as spare part listings, repair questionnaires, interconnect drawing, detailed pneumatic and electronic schematics.

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2.SPECIFICATIONS, APPROVALS AND WARRANTY

2.1. SPECIFICATIONS

Table 2-1: M703E Analytical Specifications

	Linearity	+/- 1.0% of full scale
	Precision	1.0 ppb
	Stability	+/- 2.0 ppb (photometer feedback mode)
	Response Time	180 seconds to 95%
	Stability (7-days)	1% photometer feedback; 3% without photometer feedback (CNST or REF)
	Table 2-2: M703E Electrical and Physical Specifications
	Temperature Range	5-40ºC
	Humidity Range	0 - 95% RH, non-condensing
	Dimensions (HxWxD)	7” (178 mm) x 17” (432 mm) x 24” (609 mm)
	Operating Altitude	10,000 ft Maximum
	Weight	35.5 lbs (16.1 kg) including internal zero air pump
	AC Power	115VAC, 60Hz
		230VAC,50HZ
	Analog Outputs	1 user configurable output
	Analog Output Ranges	0.1 V, 1 V, 5 V or 10 V
		Range with 5% under/over-range
	Analog Output Resolution	1 part in 4096 of selected full-scale voltage (12 bit)
	Digital Control Outputs	12 opto-isolated outputs
	Digital Control Inputs	12 opto-isolated outputs
	Status Outputs	12 opto-isolated outputs, 5 defined, 7 spare
	Serial I/O	2 ports: 1x RS-232; 1x RS-485 or RS-232 (configurable)
		Communication speed: 300 - 115200 baud (user selectable)
		EN61326 (1997 w/A1: 98) Class A, FCC Part 15 Subpart B Section 15.107 Class
	Certifications	A, ICES-003 Class A (ANSI C63.4 1992) & AS/NZS 3548 (w/A1 & A2; 97)
		Class A.
		IEC 61010-1:90 + A1:92 + A2:95,

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Table 2-3: M703E Specifications for Ozone Generator

Maximum Output	6 ppm LPM
Minimum Output	100 ppb LPM
Response Time:	180 Sec. (98%)
Optical Feedback	Standard

Table 2-4: M703E Specifications for O3 Photometer
Full Scale Range	100 ppb to 10 ppm ; User Selectable
Precision	1.0 ppb
Linearity	1.0% of Full Scale
Rise/Fall Time	<20 sec (photometer response)
Zero Drift	<1.0 ppb / 7 days
Span Drift	<1% / 24 hours; <2% / 7 days
Minimum Gas Flow Required	800 cc3/min

2.2. CE MARK COMPLIANCE

EMISSIONS COMPLIANCE

The Teledyne Instruments’ M703E Photometric O3 Calibrator is designed to be fully compliant with:

EN61326 (1997 w/A1: 98) Class A, FCC Part 15 Subpart B Section 15.107 Class A, ICES-003 Class A (ANSI C63.4 1992) & AS/NZS 3548 (w/A1 & A2; 97) Class A.

Test status: Pending.

SAFETY COMPLIANCE

The Teledyne Instruments’ M703E Photometric O3 Calibrator is designed to be fully compliant with:

IEC 61010-1:90 + A1:92 + A2:95,

Test status: Pending.

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2.3. WARRANTY

WARRANTY POLICY (02024D)

Prior to shipment, T-API equipment is thoroughly inspected and tested. Should equipment failure occur, T-API assures its customers that prompt service and support will be available.

COVERAGE

After the warranty period and throughout the equipment lifetime, T-API stands ready to provide on-site or in-plant service at reasonable rates similar to those of other manufacturers in the industry. All maintenance and the first level of field troubleshooting is to be performed by the customer.

NON-API MANUFACTURED EQUIPMENT

Equipment provided but not manufactured by T-API is warranted and will be repaired to the extent and according to the current terms and conditions of the respective equipment manufacturers warranty.

GENERAL

During the warranty period, T-API warrants each Product manufactured by T-API to be free from defects in material and workmanship under normal use and service. Expendable parts are excluded.

If a Product fails to conform to its specifications within the warranty period, API shall correct such defect by, in API's discretion, repairing or replacing such defective Product or refunding the purchase price of such Product.

The warranties set forth in this section shall be of no force or effect with respect to any Product: (i) that has been altered or subjected to misuse, negligence or accident, or (ii) that has been used in any manner other than in accordance with the instruction provided by T-API, or (iii) not properly maintained.

THE WARRANTIES SET FORTH IN THIS SECTION AND THE REMEDIES THEREFORE ARE EXCLUSIVE AND IN LIEU OF ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE OR OTHER WARRANTY OF QUALITY, WHETHER EXPRESSED OR IMPLIED. THE REMEDIES SET FORTH IN THIS SECTION ARE THE EXCLUSIVE REMEDIES FOR BREACH OF ANY WARRANTY CONTAINED HEREIN. API SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATED TO THIS AGREEMENT OF T-API'S PERFORMANCE HEREUNDER, WHETHER FOR BREACH OF WARRANTY OR OTHERWISE

TERMS AND CONDITIONS

All units or components returned to Teledyne Instruments Incorporated should be properly packed for handling and returned freight prepaid to the nearest designated Service Center. After the repair, the equipment will be returned, freight prepaid.

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M703E Calibrator Operator’s Manual	Getting Started

3. GETTING STARTED

3.1. UNPACKING AND INITIAL SETUP

CAUTION

THE M703E WEIGHS ABOUT 16.1 KG (35.5 POUNDS) WITHOUT OPTIONS

INSTALLED. TO AVOID PERSONAL INJURY, WE RECOMMEND USING TWO

PERSONS TO LIFT AND CARRY THE CALIBRATOR.

1.Inspect the received packages for external shipping damage. If damaged, please advise the shipper first, then Teledyne Instruments.

2.Included with your calibrator is a printed record of the final performance characterization performed on your instrument at the factory. This record, titled Final Test and Validation Data Sheet (P/N 05760) is an important quality assurance and calibration record for this instrument. It should be placed in the quality records file for this instrument.

3.Carefully remove the top cover of the calibrator and check for internal shipping damage.

Remove the set-screw located in the top, center of the Front panel.

Remove the 2 screws fastening the top cover to the unit (one per side towards the rear).

Slide the cover backwards until it clears the calibrator’s front bezel.

Lift the cover straight up.

NOTE

Printed circuit assemblies (PCAs) are sensitive to electro-static discharges too small to be felt by the human nervous system. Failure to use ESD protection when working with electronic assemblies will void the instrument warranty.

See Chapter 12 for more information on preventing ESD damage.

CAUTION

NEVER DISCONNECT ELECTRONIC CIRCUIT BOARDS, WIRING HARNESSES OR ELECTRONIC SUBASSEMBLIES WHILE THE UNIT IS UNDER POWER.

4.Inspect the interior of the instrument to make sure all circuit boards and other components are in good shape and properly seated.

5.Check the connectors of the various internal wiring harnesses and pneumatic hoses to make sure they are firmly and properly seated.

6.Verify that all of the optional hardware ordered with the unit has been installed. These are checked on the paperwork accompanying the calibrator.

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VENTILATION CLEARANCE: Whether the calibrator is set up on a bench or installed into an instrument rack, be sure to leave sufficient ventilation clearance.

AREA	MINIMUM REQUIRED CLEARANCE
Back of the instrument	10 cm / 4 inches
Sides of the instrument	2.5 cm / 1 inch
Above and below the instrument.	2.5 cm / 1 inch

Various rack mount kits are available for this calibrator. See Chapter 5 of this manual for more information.

3.1.1. MODEL 703E CALIBRATOR

FASTENER

MODE FIELD

LOCKING SCREW

MESSAGE FIELD

FASTENER

KEY DEFINITION				KEYBOARD					ON / OFF SWITCH	STATUS LED’s
		Figure 3-1:				M703E Front Panel Layout
O3 Outlet to	Photometer	O3 Generator			Photometer Gas Status Outputs Control Outputs Analog Output					Optional Ethernet
Photometer	O3 Inlet	Exhaust			Connectors					Card

FAN
AC Power	Cal Gas	Inlet for	Inlet for External	DCE-DTE COMM Ports Control Inputs Serial No. Tag
Connector	Outlets	Dry Air	Zero Air Source	Switch

Figure 3-2: M703E Rear Panel Layout

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Ethernet PCA	Gas Inlets & Outlets
installed here

(Optional)	Photometer
	Pump
Motherboard
CPU PCA

O3 Generator &

Photometer,

Pressure/Flow

Sensor PCA

O3 Generator

Assembly

Photometer

M/R Valve

O3 Generator

Lamp Driver

PHOTOMETER

5 LPM

Flow Control

Assy.

Pressure

Regulator

Inlet

Pressure

Regulator

Inlet

O3 Generator

Dry Air

Pump Inlet

Outlet to O3

Generator

DFU Filters

Charcoal

Scrubber on

Top

Figure 3-3: M703E Internal Layout – Top View

AC Power

Connector

Back Panel

Relay PCA

DC Power supplies

Dry Air

Pump

Outlet

Dry Air

Pump

Check

Valve

1 LPM Flow

Control Assy.

Inlet to Regulator

ON / OFF Switch

Front Panel

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							O
							3
CHARCOAL SCRUBBER					O	O	FLOW SENSOR
						3
	Control Flow LPM) 0.2 to 0.(1	Control Flow lpm) 0.(5	cm(100	Flow	3 GENERATOR	Assembly Generator
			3	Control
			/min)
		Figure 3-4:			M703E Pneumatic Diagram

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3.2. ELECTRICAL CONNECTIONS

3.2.1. POWER CONNECTION

Verify the correct line voltage and frequency configuration on the serial number tag on the rear panel of the M703E.

Attach the power cord to the calibrator and plug it into a power outlet capable of carrying at least 10 A current at your AC voltage and that it is equipped with a functioning earth ground.

CAUTION

HIGH VOLTAGES ARE PRESENT INSIDE THE CALIBRATORS CASE

POWER CONNECTION MUST HAVE FUNCTIONING GROUND CONNECTION.

DO NOT DEFEAT THE GROUND WIRE ON POWER PLUG.

TURN OFF CALIBRATOR POWER BEFORE DISCONNECTING OR

CONNECTING ELECTRICAL SUBASSEMBLIES.

CAUTION

DO NOT LOOK AT THE PHOTOMETER UV LAMP.

UV LIGHT CAN CAUSE EYE DAMAGE.

ALWAYS WEAR GLASSES MADE FROM SAFETY UV FILTERING GLASS

(PLASTIC GLASSES WILL NOT DO).

3.2.2. ANALOG OUTPUT TEST CHANNEL CONNECTIONS

The M703E is equipped with an analog output channel accessible through a connector on the back panel of the instrument. The standard configuration for this output is 0-5 VDC. It can be set by the user to output one of a variety of diagnostic test functions (see Section 6.9.)

To access these signals attach a strip chart recorder and/or data-logger to the appropriate analog output connections on the rear panel of the calibrator.

Pin-outs for the analog output connector at the rear panel of the instrument are:

ANALOG OUT

+ –

Figure 3-5: M703E the TEST CHANNEL Connector

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3.2.3. CONNECTING THE STATUS OUTPUTS

The status outputs report calibrator conditions via optically isolated NPN transistors, which sink up to 50 mA of DC current. These outputs can be used interface with devices that accept logic-level digital inputs, such as programmable logic controllers (PLC’s). Each Status bit is an open collector output that can withstand up to 40 VDC. All of the emitters of these transistors are tied together and available at D.

NOTE

Most PLC’s have internal provisions for limiting the current that the input will draw from an external device. When connecting to a unit that does not have this feature, an external dropping resistor must be used to limit the current through the transistor output to less than 50 mA. At 50 mA, the transistor will drop approximately 1.2V from its collector to emitter.

The status outputs are accessed via a 12-pin connector on the calibrator’s rear panel labeled STATUS. The function of each pin is defined in Table 3-1.

STATUS

1

2

3

4

5

6

7

8

D

+

SYSTEM OK

POWER OK

CAL ACTIVE

DIAG

TEMP ALARM

PRESS ALARM

Unassigned

Unassigned

EMITTER BUSS

+ 5 VDC

CALIBRATOR INRTERNAL GROUND

Figure 3-6: Status Output Connector

The pin assignments for the Status Outputs are:

Table 3-1: Status Output Pin Assignments

	OUTPUT	STATUS	CONDITION
	#	DEFINITION

1SYSTEM OK On, if no faults are present.

2Unassigned

3CAL ACTIVE On if the calibrator is in GENERATE mode

4

DIAG

On if the calibrator is in DIAGNOSTIC mode

5TEMP ALARM On whenever a temperature alarm is active.

6PRESS ALARM On whenever gas pressure alarm is active

7 & 8		Unassigned
D		Emitter BUSS	The emitters of the transistors on pins 1 to 8 are bussed together.
		Digital Ground	The ground level from the calibrator’s internal DC power supplies.
D		Emitter BUSS	The emitters of the transistors on pins 9 to 16 are bussed together.
+		DC POWER	+ 5 VDC

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