Optical Scientific Inc
OFS 2000CW User’s Guide
P/N 1910-905
Rev. 03/28/13
ii
Table of Contents
1 OFS -2000CW OVERVIEW ......................................................................................................................... 1
1.1 Theory of Operation .............................................................................................................................. 1
1.2 OFS -2000CW Specifications ................................................................................................................ 3
1.3 Description of Units ............................................................................................................................... 4
1.3.1 OFS 2000CW Transmitter ............................................................................................................... 5
1.4 OFS 2000CW Receiver (RX) Unit .......................................................................................................... 6
1.5 Control Box ........................................................................................................................................... 7
1.6 Temperature Probe ..............................................................................................................................10
1.7 Activator Heater ...................................................................................................................................10
2 Pre
– Installation .........................................................................................................................................11
2.1 OFS Placement ....................................................................................................................................11
2.2 OFS 2000CW Sensor Placement .........................................................................................................12
2.3 Flange Alignment Guidelines ................................................................................................................13
2.4 Flange Mounting Examples ..................................................................................................................14
2.5 Flange Pipe Extension..........................................................................................................................15
2.6 Flange Pipe Mounting ..........................................................................................................................16
3 Installation ..................................................................................................................................................17
3.1 Required at Transmitter or Receiver Location .......................................................................................17
3.2 Required at Control Unit Location .........................................................................................................17
3.3 Mechanical ...........................................................................................................................................18
3.3.1 TX/RX Units ...................................................................................................................................18
3.3.2 Control Units ..................................................................................................................................20
3.4 Purge Air ..............................................................................................................................................21
3.5 OFS in Hazardous or High Temperature Applications ...........................................................................23
3.6 Pressurization Air (Z-Purge Air) ............................................................................................................24
3.6.1 Unit Tubing Instructions .................................................................................................................26
3.6.2 Pressurization Unit Set Up .............................................................................................................26
3.6.3 Pressurization Unit Operation .........................................................................................................27
3.7 AC Power Connections ........................................................................................................................28
3.7.1 Transmitter Unit .............................................................................................................................28
3.7.2 Control Box ....................................................................................................................................28
3.8 User Interface Connections ..................................................................................................................29
3.9 OFS 200CW Interconnecting Cables ....................................................................................................30
3.10 AGC Cable Connections for OFS 2000CW Models .............................................................................31
3.11 OFS Receiver Cable ..........................................................................................................................31
3.11.1 Temperature Probe Interconnect ..................................................................................................32
3.11.2 Activator Heater Interconnect. ......................................................................................................32
3.12 4-20 mA Current Loop Connections ....................................................................................................33
3.13 TB2 Fault / Cal Relays & External Calibration .....................................................................................34
3.13.1 Fault Relay ..................................................................................................................................34
3.13.2 Cal Relay .....................................................................................................................................34
3.13.3 External Calibration Input .............................................................................................................34
3.14 Computer Connection.........................................................................................................................35
3.14.1 HyperTerminal Setup ...................................................................................................................36
4 OFS System Configuration Setup ...............................................................................................................37
4.1 Checking Communications ...................................................................................................................37
4.2 OFS 2000C Setup ................................................................................................................................37
4.2.1 Units of Measurement ....................................................................................................................37
4.2.2 Time Constant ...............................................................................................................................38
4.2.3 Serial Output ..................................................................................................................................38
4.2.4 Current Loop ..................................................................................................................................38
4.2.5 Correction Factor ...........................................................................................................................39
4.2.6 Multiple Point Correction Factor .....................................................................................................40
4.2.7 Duct Area Data ..............................................................................................................................41
4.2.8 Calibration Percentage (Optional) ..................................................................................................41
5 Poll Commands & Data Output ...................................................................................................................42
5.1 "A" Poll (Short Data String) Output .......................................................................................................42