Sierra Smart-Trak IM-100 Series User manual

Series 100 Instruction Manual Table of Contents
IM-100-C 0-1
Smart-Trak®100 Series
Mass Flow Meters & Controllers
Instruction Manual
IM-100 Series
Rev. C.9, June 2010

Table of Contents Series 100 Instruction Manual
0-2 IM-100-C
GLOBAL SUPPORT LOCATIONS: WE ARE HERE TO HELP!
CORPORATE HEADQUARTERS
5 Harris Court, Building L Monterey, CA 93940
Phone [phone] [phone] Fax [phone]
www.sierrainstruments.com
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ASIA HEADQUARTERS
Rm. 618, Tomson Centre, Bldg A, 188 Zhang Yang Road
Pu Dong New District, Shanghai, P.R. China
Phone: + 8621 5879 8521 Fax: [phone]
IMPORTANT CUSTOMER NOTICE: OXYGEN SERVICE
Sierra Instruments, Inc. is not liable for any damage or personal injury, whatsoever, resulting from the use of
Sierra Instruments standard mass flow meters or controllers for oxygen gas. You are responsible for deter-
mining if this mass flow meter or controller is appropriate for your oxygen application. You are responsible
for cleaning the mass flow meter or controller to the degree required for your oxygen flow application.
© COPYRIGHT SIERRA INSTRUMENTS 2010
No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system,
or translated into any human or computer language, in any form or by any means, electronic, mechanical,
manual, or otherwise, or disclosed to third parties without the express written permission of Sierra Instru-
ments. The information contained in this manual is subject to change without notice.
TRADEMARKS
Smart-Trak®100 Series and Dial-A-Gas™ is a Registered Trademark of Sierra Instruments, Inc. Other
product and company names listed in this manual are trademarks or trade names of their respective manu-
facturers.

Series 100 Instruction Manual Table of Contents
IM-100-C 0-3
TABLE OF CONTENTS
Chapter 1 Introduction
Introduction.............................................................................................1-1
Using this Manual...................................................................................1-1
Safety Information ..................................................................................1-2
Receipt of System Components..............................................................1-2
Definitions Used in This Manual............................................................1-3
The Smart-Trak Flow Sensing Principle ................................................1-4
Chapter 2 Installation
Before You Begin Installation ................................................................2-1
Smart-Trak Data Labels..........................................................................2-1
Pre-Installation Checklist........................................................................2-2
Installing the Instrument-Plumbing ........................................................2-3
Compression Fittings ............................................................2-3
VCO Fittings.........................................................................2-4
VCR Fittings .........................................................................2-4
1/4-inch Female NPT Fittings...............................................2-4
Installing the Instrument-Mechanical Mounting ....................................2-5
Installing the Instrument-Electrical Connections ...................................2-6
D-connector PIN assignments ..............................................2-7
Power Supply Requirements.................................................2-8
RS-232 Wiring ......................................................................2-9
Chapter 3 Analog Operation
Introduction.............................................................................................3-1
Analog Operation, Mass Flow Meters....................................................3-2
Analog Operation, Mass Flow Controllers .............................................3-2
Smart-Trak Features ...............................................................................3-3
Setpoint Adjustment .............................................................3-3
Changing the Output or Setpoint Signals .............................3-3
Over-Range Condition..........................................................3-3
Manual Valve Override-Valve Close ...................................3-4
Manual Valve Override-Valve Purge ...................................3-4
Chapter 4 Pilot Module Operation
Introduction to the Pilot Module.............................................................4-1
Pilot Module Features and Capabilities..................................................4-2
Mass Flow Meters...................................................................................4-3
Mass Flow Controllers............................................................................4-4
Pilot Module Menus and User Interface .................................................4-5

Table of Contents Series 100 Instruction Manual
0-4 IM-100-C
Map of the User Interface .......................................................................4-7
Upper Screens (Display).............................................................4-8
Mass Flow Screen.................................................................4-8
Setpoint Screen .....................................................................4-8
Valve Position Screen...........................................................4-8
Full Scale Screen ..................................................................4-9
Lower Level Screens (Changing Parameters) ..........................4-10
Getting to the Lower Level Screens ...................................4-10
Password .............................................................................4-10
Making Changes to the the Lower Level Screens ..............4-12
Change Setpoint Value Screen ...........................................4-12
Change Units Screen...........................................................4-14
Change Gas (Dial-A-GasTM) Screen...................................4-15
Change Valve Operation (Close, Purge) Screen.................4-16
Change Setpoint Source Screen..........................................4-18
Change Output Signals Screen ...........................................4-19
Change Full Scale Screen ...................................................4-20
Change Password Screen ....................................................4-21
Lost Password .....................................................................4-23
Maintenance Functions .......................................................4-23
Chapter 5 RS-232 Operation with Smart-Trak Software
Introduction.................................................................................5-1
Summary of Smart-Trak Features...............................................5-2
Power Up Your Instrument.........................................................5-3
Power Up Your Computer ..........................................................5-3
Loading the Smart-Trak Software ..............................................5-4
Connecting Smart-Trak to your Computer .................................5-4
Running the Smart-Trak Software..............................................5-7
Using the Smart-Trak Software ................................................5-10
Upper Section of Software Window.........................................5-10
Password Section ......................................................................5-11
Lower Section of Software Window.........................................5-11
Change Setpoint Value .......................................................5-12
Change Valve Operation (Close, Purge).............................5-12
Change Gas (Dial-A-GasTM)...............................................5-13
Change Units.......................................................................5-13
Change Setpoint Source......................................................5-13
Change Output Signal.........................................................5-14
Change Full Scale ...............................................................5-14
Change Password (Lost Passwords) ...................................5-15
Lost Password .....................................................................5-16
Other Useful Features .........................................................5-17
Comm Port ..........................................................................5-17

Series 100 Instruction Manual Table of Contents
IM-100-C 0-5
Read Controller Parameters ................................................5-17
Chapter 6 Technical Support and Service
Technical Support...………………………………….…………..……6-1
Sierra Website........................................................................ …6-2
Returning Equipment to the Factory………………….………..6-3
Appendix A Gas Tables
Pre-programmed gas list-Dial-A-Gas……………………………...…..A-1
K-Factor Calculations ……………………………………………...….A-1
Gas Tables with K-factors………………………………………..……A-2
Appendix B Product Specifications
Performance Specifications………………..………………… .B-1
Operating Specifications ………………………………………B-1
Physical Specifications …...…………..………………….……B-3
Optional Accessories……..………………..…………………..B-4
Appendix C Flow Chart for Pilot Module User Interface
Appendix D HD DB-15 PIN Configuration
Appendix E Dimensions and Mounting
Appendix F Micro-Trak Installation and Operation

Series 100 Instruction Manual Chapter 1: Introduction
IM-100-C 1-1
CHAPTER 1: INTRODUCTION
Welcome to the future of gas flow measurement!
The Sierra Instruments’ Smart-Trak Series 100 is an innovation from Sierra, a
company that has designed and manufactured gas mass flow measurement in-
struments since the early 1970’s. This manual is your guide to Smart-Trak. Vis-
it the Sierra Instruments website www.sierrainstruments.com any time for
more information about this product.
The Smart-Trak instruments offer a variety of features for ease of operation.
Among these features:
9Dial-A-Gas: allows a user to change from among 10 gases while maintaining
accuracy.
9The Optional Pilot Module: control electronics that offers both display and
control options at the user’s fingertips.
9Digital Electronics: maximum performance with minimum noise plus ex-
ceptional tuning capability.
9Choice of 4 Analog Communications Options and RS-232 with every
Smart-Trak instrument.
9Flexible Design with many functions that can be re-configured on-site by the
user.
9Compact Footprint that allows Smart-Trak to fit almost anywhere.
9Wide range of sizes for gas flow from 0.1 sccm to 1000 slpm.
9And many more…visit www.sierrasmarttrak.com
Using This Manual
This manual is organized into six chapters:
•Chapter 1: Introduction and Theory of Operation.
•Chapter 2: Installation, Plumbing & Wiring instructions.
•Chapter 3: Analog Operation.
•Chapter 4: Digital Operation with the Optional Pilot Module.
•Chapter 5: Digital Operation with RS-232 & Smart-Trak Software.
•Chapter 6: Technical Support and Service.

Chapter 1: Introduction Series 100 Instruction Manual
1-2 IM-100-C
There are also 6 Appendices:
•Appendix A: Smart-Trak Pre-Programmed gases, Conversion Formula and
Gas Tables.
•Appendix B: Product Specifications, useful Optional Parts & Accessories
•Appendix C: Flowchart for the Pilot Module.
•Appendix D: PIN Configuration of the mini-D connector
•Appendix E: Dimensional Drawings & Mounting Instructions
•Appendix F: Special Instructions for Installation and Operation of the Mi-
cro-Trak ultra-low flow instruments.
Throughout this manual, we use the word instrument as a generic term to
represent all models of Sierra Instruments’ Smart-Trak Series 100 mass flow
meters and controllers.
SAFETY INFORMATION
Caution and warning statements are used throughout this book to draw your at-
tention to important information.
Warning!
Caution!
This statement appears with information that
is important to protect people and equipment
from damage. Pay very close attention to all
warnings that apply to your application.
This statement appears with information that is
important for protecting your equipment and
performance. Read and follow all cautions that
apply to your application.
RECEIPT OF YOUR INSTRUMENT
When receiving the instrument, carefully check the outside packing carton for
damage that may have incurred during shipment. If the carton is damaged, notify
the local carrier and submit a report to the factory or distributor. Remove the
packing slip and check that all ordered components are present and match your
specifications (as ordered). Make sure any spare parts or accessories are not dis-
carded with the packing material. Do not return any equipment to the factory
without first contacting one of Sierra’s Technical Support Centers:

Series 100 Instruction Manual Chapter 1: Introduction
IM-100-C 1-3
USA (Headquarters) Customer Service:
TOLL FREE: 800-866-0200
PHONE: [phone]
FAX: [phone]
EMAIL: [email protected]
European Customer Service:
PHONE: [phone]
FAX: [phone]
EMAIL: [email protected]
Asia Customer Service:
PHONE: + 8621 5879 8521
FAX: [phone]
EMAIL: www.sierra-asia.com
DEFINITIONS USED IN THIS MANUAL
The following terms are used frequently in this manual. They are presented here
with their definitions for your information.
Setpoint—The command or control signal supplied to a flow controller is called
its setpoint. The controller will maintain the flow at this value.
Full scale—The highest flow that an instrument will meter within its specified
accuracy. It is often possible for an instrument to measure a flow beyond its full
scale value, but the accuracy of this measurement may be outside of published
specifications.
Purge—The Smart-Trak Mass Flow Controller is supplied with the ability to
open the valve far beyond the full scale position to allow them to be cleaned.
This is usually accomplished by blowing clean, dry nitrogen through the instru-
ment. When the valve is opened to this cleaning position, it is said to be in the
Purge mode.
LFE—Laminar Flow Element (LFE) or bypass generates pressure drop forcing a
small fraction of the total flow to pass through the sensor capillary tube.

Chapter 1: Introduction Series 100 Instruction Manual
1-4 IM-100-C
THE SMART-TRAK FLOW SENSING PRINCIPLE
The operating principle of the Smart-Trak instruments is based on heat transfer
and the first law of thermodynamics. During operation process gas enters the in-
strument’s flow body and divides into two flow paths, one through the sensor
tube, the other through the laminar flow bypass. The laminar flow bypass (often
called LFE which stands for “laminar flow element”) generates a pressure drop,
P1–P2, forcing a small fraction of the total flow to pass through the sensor tube
(m1).
Figure 1-1. Flow Paths through the Instrument
Two resistance temperature detector (RTD) coils around the sensor tube direct a
constant amount of heat (H) into the gas stream. During operation, the gas mass
flow carries heat from the upstream coil to the downstream coil. The resulting
temperature difference (∆T) is measured by the Smart-Trak microprocessor.
From this, Smart-Trak calculates the output signal. Since the molecules of the
gas carry away the heat, the output signal is linearly proportional to gas mass
flow.
Figure 1-2. Flow Measuring Principle

Series 100 Instruction Manual Chapter 1: Introduction
IM-100-C 1-5
Figure 1-3. Sensor Temperature Distribution
Figures 1-2 and 1-3 show the mass flow through the sensor tube as inversely pro-
portional to the temperature difference of the coils. The coils are legs of a bridge
circuit with an output voltage in direct proportion to the difference in the coils’ re-
sistance; the result is the temperature difference (∆T). Two other parameters, heat
input (H) and coefficient of specific heat (Cp) are both constant. Through careful
design and attention to these parameters, this output signal is made linear over the
transducer’s normal operating range (Figure 1-4). As a result, the measured flow
through the sensor tube is directly proportional to the gas flow in the main body.
Figure 1-4. Linear Range of the Transducer’s Output Signal
In the Smart-Trak mass flow controllers, the gas which flows through the moni-
toring section is precisely regulated by the built-in electromagnetic valve. The
normally closed valve is similar to an on/off solenoid valve, except that the cur-
rent to the valve coil, and hence the magnetic field, is modulated so that the fer-
romagnetic valve armature, or valve plug, assumes the exact height above the
valve’s orifice required to maintain the valve’s command flow (set point). The
result is excellent resolution.

Series 100 Instruction Manual Chapter 2: Installation
IM-100-C 2-1
CHAPTER 2 INSTALLATION
Before You Begin Installation
Before installing the instrument, ensure that the installation site conforms
to the specific operating parameters recorded on the instrument’s Data La-
bel. The Data Label is mounted on the back of the instrument electronics
enclosure (see sample Data Labels in Figure: 2-1). This is critical because
each instrument is configured for a specific application range. Please re-
view the gas or gases, the mounting orientation, the maximum flow
range(s), the inlet and outlet pressure(s), and the operating temperature(s).
The line pressure should not exceed 500 psig (34 barg). The temperature
should not exceed 122°F (50°C). The minimum operating temperature is
32°F (0°C) and ambient temperature is 0-50°C. If your application exceeds
any of these parameters, contact your Sierra Sales Agent before installa-
tion. You may also contact one of Sierra’s Technical Support Centers.
FACTORY USA: TOLL FREE: 800-866-0200 or PHONE: [phone]
or FAX: [phone] or EMAIL: [email protected]
Figure 2-1: Examples of Smart-Trak Data Labels
Warning!
Injury can result if line
pressure exceeds the
maximum rating of
500 psig (34 barg).

Chapter 2: Installation Series 100 Instruction Manual
2-2 IM-100-C
Pre-Installation Check List
1. Double-check to be sure that the o-ring material used in your
instrument is compatible with the gas to be measured. The o-
ring material used in your Smart-Trak can be found in the Data
Label. See Appendix A for a table of elastomer compatibility with
a wide variety of gases.
2. Sierra strongly recommends you install an in-line filter up-
stream of the instrument. Recommended filter size: 10 micron.
A 10 micron filter is available from Sierra as an accessory. See
Appendix B or contact your local Sierra distributor.
3. Do not locate the instrument in areas subject to sudden tem-
perature changes, excessive moisture or near equipment ra-
diating significant amounts of heat. Be sure to allow adequate
space for cable connectors and wiring.
4. For controllers, use a properly sized pressure regulator. Make
sure the pressure regulator is not too small or too big. There can be
no restrictions (such as valves, tubing or pipe internal diameters,
reducers, etc.) upstream or downstream of the controller with a
dimension that is less than the valve orifice diameter. To deter-
mine orifice diameter, consult the calibration certificate included
with your instrument.
5. Output Signals: The Smart-Trak has two analog outputs that are
linearly proportional to the gas mass flow rate. These are a 4-20
mA signal plus your choice of one voltage signal: 0-5 VDC or 0-
10 VDC or 1-5 VDC. The voltage signal specified at time of order
will be indicated on the data label. You may change between the
current and the voltage output signal at your discretion after receipt
of the instrument using the Pilot Module or the Smart-Trak Soft-
ware (see Chapters 4 & 5). Changing the voltage output has no in-
fluence on the instrument’s accuracy.
6. The CAT-5 connector on the side of the Smart-Trak is NOT an
Ethernet connector. It is for use with the optional Remote Pilot
Module. Do not plug an Ethernet cable here as damage may result.
7. The instrument has specific power supply requirements. See
the table later in this chapter for a complete listing of power re-
quirements.

Series 100 Instruction Manual Chapter 2: Installation
IM-100-C 2-3
Installing the Instrument—Plumbing
Smart-Trak instruments are supplied with compression, VCO®, VCR®, or
female NPT process connections. To ensure a successful installation, inlet
and outlet tubing should be in a clean state prior to plumbing the instru-
ment into the system. The shipping caps covering the inlet/outlet fittings
should not be removed until immediately before installation.
Follow the installation instructions that are applicable to your instrument’s
process connection. Ensure that the tubing is free from burrs, or sharp rims
that may result from cutting.
CAUTION: Before use, all plumbing should be checked carefully for
leaks, especially at the connecting fittings. All instruments are leak-
tested prior to shipping. It is not a requirement to leak test your in-
strument. Do not use liquid leak detectors such as Snoop®to search for
leaks inside or outside the Smart-Trak. Instead, monitor pressure de-
cay.
Compression Fittings
1. Position the instrument with the flow direction arrow pointing in
the direction of flow.
2. Verify the position of the
front and back ferrule. In-
sert the tubing into the fit-
ting. Be sure that the tub-
ing rests firmly on the
shoulder of the fitting and
that the nut is finger-tight.
Scribe the nut at the six
o’clock position.
3. While holding the fitting body steady with a backup wrench, tigh-
ten the nut 1-1/4 turns, watching the scribe mark make one com-
plete revolution and continue to the nine o’clock position. For
1/16-inch, 1/8-inch and 3/16-inch (2, 3 and 4 mm) sizes, tighten
only 3/4 turns from finger-tight. Do not over-tighten!
4. If you use flexible tubing (Example: Polyflow) use an “Insert” (see
www.swagelok.com)
5. Check the system’s entire flow path thoroughly for leaks. Do not
use liquid leak detectors. Instead, monitor pressure decay. Ex-
posing the instrument to leak detector fluid may cause damage.

Chapter 2: Installation Series 100 Instruction Manual
2-4 IM-100-C
VCO Fittings
1. Position the instrument with the flow direction arrow pointing in
the direction of flow.
2. Tighten the nut finger-tight, and then 1/8 turn tighter with a
wrench. Do not over-tighten!
3. Check the system’s entire flow path thoroughly for leaks. Do not
use liquid leak detectors. Instead, monitor pressure decay. Ex-
posing the instrument to leak detector fluid may cause damage.
VCR Fittings
1. Position the instrument with the flow direction arrow pointing the
direction of flow.
2. Install new gaskets that are compatible with the gas to be used.
3. Tighten the nut finger-tight, and then 1/8 turn tighter with a wrench.
Do not over-tighten!
4. Check the system’s entire flow path thoroughly for leaks. Do not
use liquid leak detectors. Instead, monitor pressure decay. Ex-
posing the instrument to leak detector fluid may cause damage.
1/4 Inch Female NPT
1. Position the transducer with the flow direction arrow pointing the
direction of flow.
2. Use a good quality Teflon tape. Apply to the male fittings. Alter-
natively, use a high quality paste pipe thread sealant suitable for
the application and gas and apply this compound to the inlet and
outlet fittings. Avoid getting the tape or the thread sealant onto the
first two threads to keep it out of your process gas.
3. Tighten each fitting by hand. Then, tighten no more than one (1)
turn. Do not over-tighten.
4. Check the system’s entire flow path thoroughly for leaks. Do not
use liquid leak detectors. Instead, monitor pressure decay. Ex-
posing the instrument to leak detector fluid may cause damage.

Series 100 Instruction Manual Chapter 2: Installation
IM-100-C 2-5
Installing your Instrument—Mechanical Mounting
Mounting your Instrument
The base plate or bottom of the instrument has 4 mounting holes. Two are
SAE thread and two are metric thread. For location and dimensions, please
see Appendix E.
Your Smart-Trak instrument is made from premium quality 316 stainless
steel. As a result, it may require mounting brackets to support its weight.
Exercise caution when installing to avoid damage or injury.
Mounting the Optional Remote Pilot Module
If you have the optional Remote Pilot Module control unit, you have sev-
eral mounting options.
1. Wall or Panel mounting—your Remote Pilot Module may be
mounted to a flat surface using the supplied plate and 2 special
“shoulder” screws. Simply screw the shoulder screws into the
plate. Then, attach the plate to the wall by driving 2 screws (not
included) through the 2 large central holes. MAKE SURE THE
UP ARROW IMPRINTED ON THE MOUNTING BRACKET
POINTS UPWARD. Your Remote Pilot Module will slip onto the
shoulder screws. Push against the plate and then down. To re-
move, push up and pull. Attach the CAT-5 cable to the socket on
the bottom of the Remote Pilot Module.
2. Rack mounting—to mount your Remote Pilot Module to a stan-
dard 19” laboratory rack, first purchase a “blank” panel from your
industrial supplier. Decide where the Remote Pilot Module will be
attached, then follow the procedure listed above for wall mounting.
When you are ready, insert the CAT-5 cable into the socket in the
Remote Pilot Module.
3. Desktop mounting—the Remote Pilot Module will sit on a desk
in a fashion that makes it convenient to view and operate. Insert
the CAT-5 cable into the socket in the back of the Module. Use
the cable as a “kickstand.” Gently bend the cable to recline the
Remote Pilot Module to an angle suitable for easy viewing. Alter-
nately, you can lay the Remote Pilot Module on its back and insert
the CAT-5 cable into the socket in the bottom.

Chapter 2: Installation Series 100 Instruction Manual
2-6 IM-100-C
Installing your Instrument—Electrical Connections
All electrical connections for your Smart-Trak instrument are
made on the left (inlet) side panel. See Figure 2-2: Smart-Trak
Connections below for the location of all connections. Note that
the CAT-5 connector is not an ethernet connector.
Figure 2-2: Smart-Trak connections
Smart-Trak is provided with a high density 15-pin D Connector called the
“HD DB-15” located on the side of the enclosure and either an empty mat-
ing connector or an optional pre-assembled communications cable (speci-
fied when ordering). See Appendix B to purchase pre-assembled commu-
nications cables from Sierra. Power must be supplied to the HD DB-15
connector. Other features may be accessed there as well. The pin num-
bers and assignments for the HD DB-15 connector are shown in Figure 2-
3: HD DB-15 Connector Pin Configuration (on the instrument). The cor-
responding colors of the optional communication cable wires and the
functions of each are listed in Figure 2-4: Wiring Definitions for Optional
Communication Cable. The connections for input power, analog output
signal and analog input signal (controllers only) are all made at the HD
DB-15 connector. There is a second copy of these 2 figures in Appendix
D for your convenience.

Series 100 Instruction Manual Chapter 2: Installation
IM-100-C 2-7
Figure 2-3: HD DB-15 Connector Pin Configuration (on the instrument)
Figure 2-4: Wiring Definitions for Optional Communication Cable
Pin # Wire Color in Cable Function
1. Brown Analog Ground
2. Red 0-5 VDC Output (or 0-10, 1-5 VDC)
3. Orange Analog Ground
4. Pink Valve Override Purge
5. Yellow Power Return (-)
6. Dark Green Power Input (+)
7. Light Green RS-232 Transmit (out)
8. Blue Setpoint
9. Purple Not Used
10. Gray Analog Ground
11. White Reference Voltage
(5 VDC External Setpoint & Valve Purge)
12. Black Valve Override Close
13. Brown/white RS-232 Receive (in)
14. Red/white 4-20 mA Output
15. Red/Black Chassis (Earth) Ground
Note: Pins 1, 3, 5, and 10 are connected together inside the
instrument. Sierra recommends individual wires.

Chapter 2: Installation Series 100 Instruction Manual
2-8 IM-100-C
For Basic Analog Installation of the Instrument:
•Instrument Power: The Smart-Trak requires a 15-24 VDC power supply.
If you are using the power supply supplied by Sierra, connect it to the 15-pin
HD DB-15 connector on the side of the instrument. If you are supplying
your own power source, it must be a regulated 15-24 VDC with ripple not to
exceed 100 mV peak-to-peak. It must be capable of producing the current
specified for the appropriate voltage shown in Figure 2-5: Power Supply Re-
quirements. Apply power as follows: positive (+) to the green (pin 6) and
negative (-) to the yellow (pin 5) wires. The instrument is polarity sensitive.
If you reverse this wiring, the instrument will not be damaged, but it will not
function.
Figure 2-5: Power Supply Requirements
Instrument Type Recommended Input
Voltage
Minimum Current
Required (mA)
M100L Meter 15-24 VDC (+ 10%) 130
M100M Meter 15-24 VDC (+10%) 130
M100H Meter 15-24 VDC (+10%) 130
C100L Controller 24 + 10% VDC* 400
C100M Controller 24 + 10% VDC 700
C100H Controller 24 + 10% VDC 1260
*Note: A Smart-Trak C100L Mass Flow Controller may be powered
by less than 24 VDC if Sierra’s Multi-adapter is used (See Appendix B
for Parts and Accessories ordering information). For operation of a
C100L with 12-22 VDC, the minimum current required is 800 mA.
CAUTION: This instrument is not a loop-powered device! Do NOT apply
power to the 4-20 mA output or input connections.
•Output Signal—Voltage: Measure the voltage output signal across the red
(pin 2) wire and any of the analog grounds: brown (pin 1), orange (pin 3) or
gray (pin 10). The minimum load is 1000 Ohms.
•Output Signal—Current: Measure the current output signal, 4-20 mA or 0-
20 mA, across the red/white stripe (pin 14) wire and any of the analog
grounds: pin 1, 3, or 10. The maximum load is 500 Ohms.