Sierra TM100 User manual

TM100 Thermal Mass Flow Meter
Instruction Manual
Document: S-IM-TM100 | Rev B_PN 110068
www.sierrainstruments.com

2

3
Disclaimer TM100
GLOBAL SUPPORT LOCATIONS: WE ARE HERE TO HELP!
For Global Service Centers, go to http://www.sierrainstruments.com/facilities.html
CORPORATE HEADQUARTERS
5 Harris Court, Building L Monterey, CA 93940
Phone [phone] Fax [phone]
[e-mail]
www.sierrainstruments.com
EUROPE HEADQUARTERS
Bijlmansweid 2 1934RE Egmond aan den Hoef
The Netherlands
Phone [phone] Fax [phone]
[e-mail]
ASIA HEADQUARTERS
Second Floor Building 5, Senpu Industrial Park
25 Hangdu Road Hangtou Town
Pu Dong New District, Shanghai, P.R. China
Postal Code 201316
Phone: + 8621 5879 8521 Fax: [phone]
© COPYRIGHT SIERRA INSTRUMENTS 2023
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 Instruments. The information contained
in this manual is subject to change without notice.
TRADEMARKS
TM100™, TM-Cal™, Gas-Mix™, FlowTrak™, TM100-View™, and DigiSense™ are trademarks
of Sierra Instruments, Inc. Other product and company names listed in this manual are
trademarks or trade names of their respective manufacturers.

4
Disclaimer
TM100
Warnings and Cautions
General Safety Information
We use caution and warning statements throughout this book to draw your attention to
important information.
Symbol Key
Symbol Symbol Meaning Description
Warning
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.
Caution/Note
This statement appears with
information that is important for
protecting your equipment’s
performance. Read and follow
all cautions that apply to your
application.
• Warning! Agency approval for hazardous location installations varies between flow
meter models. Consult the flow meter nameplate for specific flow meter approvals
before any hazardous location installation.
• Warning! Hot tapping must be performed by a trained professional. U.S. regulations
often require a hot tap permit. The manufacturer of the hot tap equipment and/or the
contractor performing the hot tap is responsible for providing proof of such a permit
• Warning! All wiring procedures must be performed with the power O.
• Warning! To avoid potential electric shock, follow National Electric Code safety
practices or your local code when wiring this unit to a power source and to peripheral
devices. Failure to do so could result in injury or death. All AC power connections must
be in accordance with published CE directives.
• Warning! Before attempting any flow meter repair, verify that the line is de-pressurized.
• Warning! Always remove main power before disassembling any part of the
mass flow meter.
WARNING

5
Disclaimer TM100
• Caution! Before making adjustments to the TM100, verify the flow meter is not actively
monitoring or reporting to any master control system. Adjustments to the electronics will cause
direct changes to flow control settings.
• Caution! All flow meter connections, isolation valves and fittings for hot tapping must have the
same or higher pressure rating as the main pipeline.
• Caution! The flow meter electronics and sensor probe have been manufactured and calibrated
to operate as a unit. The flow meter will not operate properly if parts are replaced from another
meter.
• Caution! Printed circuit boards are sensitive to electrostatic discharge. To avoid damaging the
board, follow these precautions to minimize the risk of damage:
- before handling the assembly, discharge your body by touching a grounded, metal object
- handle all cards by their edges unless otherwise required
- when possible, use grounded electrostatic discharge wrist straps when handling
sensitive components
CAUTION

6
Disclaimer
TM100
Receipt of System Components
When receiving a Sierra mass flow meter, carefully check the outside packing carton for damage
incurred in 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. Make
sure any spare parts or accessories are not discarded with the packing material. Do not return any
equipment to the factory without first contacting Sierra Customer Service.
Technical Assistance
If you encounter a problem with your flow meter, review the configuration information for each step
of the installation, operation, and setup procedures. Verify that your settings and adjustments are
consistent with factory recommendations. Installation and troubleshooting information can be found in
the Chapter  (Installation) and Chapter  Maintenance sections of this manual.
If the problem persists after following the troubleshooting procedures outlined in Chapter  of this
manual, contact Sierra Instruments by e-mail (see inside front cover). For urgent phone support you
may call () - between : a.m. and : p.m. PST. In Europe, contact Sierra Instruments
Europe at +  . In the Asia-Pacific region, contact Sierra Instruments Asia at + 
. When contacting Technical Support, make sure to include this information:
• The serial number (marked on the meters label)
• The firmware version (visible on the display at startup)
• The problem you are encountering and any corrective action taken
• Application information (flow range, gas, pressure, temperature and piping configuration)
Using This Manual
This manual provides information needed to install and operate the series TM Thermal Mass Flow
Meter.
Additional Resources
Visit Sierrainstruments.com for additional resources. Note: the most current versions of the TM
documents can be found at https://www.sierrainstruments.com/products/downloads.html.

TM100
7
Introduction
1. Introduction Pages 9-21
a. Quick Start Guide .........................................................................p. 9
b. Menu Trees ..............................................................................p. 11
c. General ................................................................................ p. 19
2. Installation (Mechanical) Pages 21-34
a. Lateral Placement........................................................................p. 23
b. Welding Branch Outlet to Pipe (Insertion) ...................................................p. 25
c. Installation Depth ........................................................................p. 26
d. Orientation..............................................................................p. 28
e. Mounting Instructions ....................................................................p. 27
f. Retractor Installation .......................................................................p. 31
3. Wiring (Electrical) Pages 35-45
a. Wiring Access ...........................................................................p. 35
b. Input Power .............................................................................p. 36
c. Signal Wiring and HART Communication Option .............................................p. 37
d. Pulse/Alarm Wiring (optional feature) .......................................................p. 40
e. RS485 Wiring: Modbus RTU ...............................................................p. 42
f. HART Handheld Wiring....................................................................p. 44
4. Operation (Standard Operation) Pages 46-68
a. Start Up ................................................................................p. 45
b. Programming............................................................................p. 48
c. TM-Cal™ ................................................................................p. 63
d. Gas-Mix TM..............................................................................p. 65
5. Communication Protocols Pages 70-83
a. Modbus RTU (RS485).....................................................................p. 69
b. BACnet ................................................................................ p. 81
c. HART...................................................................................p. 83
Table of Contents

TM100 Table of Contents
8
6. Maintenance Pages 85-93
a. Safe Meter Removal from Retractor ........................................................p. 85
b. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 94
7. Appendices Pages 96-107
a. Specifications ...........................................................................p. 99
b. Agency Approvals ......................................................................p. 102
c. Dimensions ............................................................................p. 103
d. Warranty...............................................................................p. 104
e. Returning your meter....................................................................p. 104
8. Definitions Page 110
9. Index Page 113

1. Record inside diameter (ID). Ensure the actual pipe ID
matches the pipe ID shown on the factory calibration
certificate. If IDs do not match, refer to p. 59.
2.
Record up/downstream straight-pipe requirements based on
Pipe ID and meter style (insertion or inline). [refer to p. 23]
3. The Flow Direction Indicator must point in the
direction of flow.
The housing can be rotated for a better view of the meter's
display. Note that the 2 set screws must be loosened before
the housing will turn. [refer to p. 29]
4.
Ensure correct probe depth setting. If using 1 ½" size pipe,
please see note on p. 26.
5.
Open the housing. If needed, the orientation of display can
be rotated in 90° increments for a better view.
[refer to p. 28 for more information]
6. Ensure power wiring [p. 37] and 4-20mA wiring [p. 38
- p. 39] are properly connected. [refer to Wiring section p.
35 for more information]
Verify the output signal wiring based on model type (Pulse/
Alarm or communication protocol) [refer to Wiring section p.
38 for more information]
7.
Apply power to the flow meter.
8. Check the remaining flow meter settings by accessing the meter settings either through the front panel of
the display or by using the TM100-ViewTM Software. Record the settings in the spaces given for items A - F
on the following page.
Use the table below as a guide while using the worksheet on the next page to record your notes.
NOTE! Please read the entire quick-start procedure before beginning installation.
ID OD
FLOW
4X = Inline
10X = Insertion
8X = Inline
15X = Insertion
Pipe ID min.
INDICATOR:
- POINT IN DIRECTION
OF FLOW
- REMOVE TO ROTATE
HOUSING ±90º,
±180º
- REPLACE INDICATOR
WHEN DONE
LOOSEN HOUSING
WITH 2 FRONT SET
SCREWS, RETIGHTEN
WHEN DONE
FLOW
FLOW
PIPE
0.73"
(18.5 mm)
L
C
F1 F2 F3 F4
ACCESS DISPLAY
BY UNSCREWING COVER
REMOVE SCREWS ON
DISPLAY TO ROTATE
DISPLAY ±180°
( - )(+) ( - )(+)(
- )(+)
Power
12-24VDC
4-20mA Pulse
/Alarm
!(
- )(+)
Power
12-24VDC
4-20mA(
-
)
!
4-20mA(+) Common Tx/Rx(
-
)
Tx/Rx(+)
F1 F2 F3 F4
Initializing...
TM100
9
Introduction
Quick Start Guide
9

Item to verify Serial Number: Serial Number: Serial Number: Serial Number:
. What is the Pipe ID? ID = ID = ID = ID =
. Calculate the Upstream/Downstream
straight-pipe requirements
UP =
DN =
UP =
DN =
UP =
DN =
UP =
DN =
.
Is the flow indicator pointed in direction
of flow?
Must the housing be rotated for
easy viewing?
Y / N
Y / N
Y / N
Y / N
Y / N
Y / N
Y / N
Y / N
. Is the probe depth setting correct? Y / N Y / N Y / N Y / N
. Have you rotated the display for easier
viewing? Y / N Y / N Y / N Y / N
. Verify proper power wiring
. Verify proper input/output wiring
After applying power to your meter, check items A - E below by accessing the meter settings either
through the front panel of the meter's display or by using the TM-View™ software tool.
A. Which flow units have been set in
meter? (SCFM, KG/H, etc..)
B. Correct values for reference
temperature and pressure? Y / N Y / N Y / N Y / N
C. Confirm the pipe ID listed above same
as "Pipe_id="
D. Verify mA and mA meter settings mA =
mA =
mA =
mA =
mA =
mA =
mA =
mA =
E. Confirm the correct gas is selected for
your application in the Gas-Mix menu
Before applying power to your meter, use this worksheet to record your notes.
If you are experiencing any problems after completing this procedure, please call the Sierra Instruments Tech Department
at 831-373-0200 to review this information.
Your Notes:
10
TM100 Quick Start Guide

MAIN MENU
I/O FLO DSP EXIT
SET I/O
COM 420 EXIT
Comm=Modbus
NXT OK
None
Modbus
BACnet
mA=Flow
NXT OK
20 mACnt=52900
CHG OK
4 mACnt=2515
CHG OK
20 mA=2345.6 SCFM
CHG OK
4 mA=0 SCFM
CHG OK
Temp
Flow Analog Outputs
Baud=9600
NXT OK
Parity=NONE
NXT OK
Address=02
CHG OK
Modbus
only
1200
2400
4800
9600
19200
38400
57600
76800
115200
NONE
ODD
EVEN
01-247
Enter menu by scrolling to display 4
and entering the password
mA Fault=Not used
NXT OK
Not used
3.6 mA
21 mA
Baud=9600
NXT OK
9600
19200
38400
57600
76800
115200 MAC_add=3
CHG OK
Max_master=127
CHG OK
ID=12345
CHG OK
Name=SITE1
CHG OK
BACnet
only
SET I/O
PUL 420 EXIT
If RS485 hardware detected
/with license
Communicaon
OR
Level 2
only
OR SET I/O
COM PUL 420 EXIT
Comm=HART
OK
Address=0
CHG OK
If pulse/alarm hardware detectedIf HART hardware detected/with license
0-63
Display Menu, p. 15
Flow Menu 1, p. 13
Digital Output Menu, p. 12
TM100
11
Introduction
Menu Trees
Fig. 1.1: TM100 Menu Tree - Main Menu

OUT=Pulse
NXTOK
Notused
Pulse
HiFloAlm
LoFloAlm
HiTempAlm
LoTempAlm
SystemAlm
PulseOutput
P/UU/PFEQEXIT
PLS/UNT=2
CHGOK
UNT/PLS=0.5
CHGOK
MaxFreq=100Hz
CHGOK
MaxFlo=5000SCFM
CHGOK
HiFloAlm=500SCFM
CHGOK
LoFloAlm=100SCFM
CHGOK
HiTmpAlm=250°F
CHGOK
LoTmpAlm=10F
CHGOK
HighFlowAlarm
LowFlowAlarm
HighTempAlarm
LowTempAlarm
Select1of3
methodstoscale
thepulseoutput
Pulse
OUT=HiFloAlm
NXTOK
OUT=LoFloAlm
NXTOK
OUT=HiTmpAlm
NXTOK
OUT=LoTmpAlm
NXTOK
SetI/O
PUL420EXIT
Alarmoutput
MAINMENU
I/OFLODSPEXIT
OUT=SystemAlm
NXTOK
SystemAlarm NOTE!A value of 0 disables the alarms
(See Flow Menu 2, p. 14, for more alarm settings)
TM100 Introduction
12
Fig. 1.2: TM100 Menu Tree - Digital Outputs

FLOW MENU 1
DGN UNT FM2 EXIT
DIAGNOSTIC
SIM TM-Cal EXIT
FloSim=0 SCFM
CHG OK
TmpSim=0 ° F
CHG OK
FLO UNT=SCFM
NXT OK
SCFM
SCFH
NM3/H
NM3/M
KG/H
KG/M
KG/S
LBS/H
LBS/M
LBS/S
NLPH
NLPM
MMSCFD
LBS/D
SLPM
NLPS
MSCFD
SM3/H
MT/H
NM3/D
MMSCFM
MCFD
SCFD
SM3/M
SM3/D
TMP UNT=° F
NXT OK
Deg F
Deg C
TmpRef=60 °F
CHG OK
PRES UNT=Psia
NXT OK
PresRef=14.73
CHG OK
mmHG
Psia
bara
STP
Simulate Flow?
YES NO
Simulate Temp?
YES NO
DNS=1.2323 kg/m3
OK
MAIN MENU
I/O FLO DSP EXIT
ENABLE SIM?
YES NO
Flow Menu 2 Menu, p. 14
TM-Cal™ Menu, p. 16
TM100
13
Introduction
Fig. 1.3: TM100 Menu Tree - Flow Menu 1

FLOW MENU 2
GAS SPC PRM EXIT
K fact = 0%
CHG OK
RESET CRC?
YES NO
Cutoff=12.5 SCFM
CHG OK
Pipe_id=4.026 In
CHG OK
Filter=0.8 Sec
CHG OK
Parameters
Flow cutoffin selected units
Pipe id in inches or mm
Flow Filter in seconds
Min = 0.8, max = 10
HiFloAlm=0 SCFM
CHG OK
LoFloAlm=0 SCFM
CHG OK
HiTmpAlm=0 SCFM
CHG OK
LoTmpAlm=0 SCFM
CHG OK
•
•
These alarms can be used without the digital output assigned to the
alarm.
If that is the case, the alarm status will only be shown on the
display, through serial communicaon or TM100-View.TM
•If the digital output is assigned to an alarm, changing the value here
will change that seng.
Level 2
RESTORE DATABASE?
YES NO
SET NRT?
YES NO
ARE YOU SURE?
YES NO
TOT RST OFF
OK
This message will show for 3 seconds
before returning to the Flow
Parameter 2 Menu.
WARNING: Once the non-reseable
totalizer is acvated, it cannot be
undone.
MAIN MENU
I/O FLO DSP EXIT
FLOW MENU 1
DGN UNT FM2 EXIT
Gas-Mix TM Menu, p. 17
TM100 Introduction
14
Fig. 1.4: TM100 Menu Tree - Flow Menu 2

DISPLAY/PASSWORD
DSPPSWEXIT
DSP1L1=FLorate
NXTOK
FLorate
Total
Elps
Temp
Alarm
DSP1L2=Total
NXTOK
DSP2L1=temp
NXTOK
DSP2L2=Elps
NXTOK
ALTERNATE=Off
NXTOK
On
Off
PASSWD=1234
CHGOK
FLorate
Total
Elps
Temp
Alarm
FLorate
Total
Elps
Temp
Alarm
FLorate
Total
Elps
Temp
Alarm
Whenalternate
"ON",flashes
betweenthe2
displays
Display1
Line1
Display2
Line1
Display2
Line2
MAINMENU
I/OFLODSPEXIT
Display1
Line2
NOTE!All readings updated every second
• Flo Rate = Flow rate of process gas
• Total = Total flow of process gas
• Elps = Elapsed time since reset of flow total
• Temp = Temperature of process gas
• Alarm = Notification of errors; diagnostic errors
TM100
15
Introduction
Fig. 1.5: TM100 Menu Tree - Display Menu

DIAGNOSTIC MENU
SIM TM-Cal EXIT
TM-CalMENU
VER EXIT
Verifying TM-Cal
Please Wait
Verifying TM-Cal
0.512 T=123
TM-Cal=0.259
Pass OK
Displays the test’s
count down mer
Displays a TM-Cal value
during test
VERIFY TM-Cal?
YES NO
TM-Cal=0.911
Warning OK
TM-Cal=2.321
Fail OK
FLOW MENU 1
DGN UNT FM2 EXIT
MAIN MENU
I/O FLO DSP EXIT
TM-CalFail
Greater than ±1.0
TM-CalPass
Less than ±0.80
TM-CalWarning
Between ±0.80 to ±1.0
Flo: Hold value
NXT EXIT OK
Hold value
Go to zero
Take Control
Off-line EXIT OK
TM100 Introduction
16
Fig. 1.6: TM100 Menu Tree - TM-Cal™ Menu

FLOWMENU2
GASSPCPRMEXIT
Propane=0%
UPDNOK
GAS=%Mix
NXTOK
Methane
CO2
Nitrogen
Helium
Nat.Gas(mix)
Argon
Hydrogen
Air
Propane
Butane
Oxygen
Ethane
%Mix
Oxygen=0%
UPDNOK
GasMix(100%)
OK
Onlyfor
gasmix
CO2=30%
UPDNOK
Showsonlyifgasmix
doesnotequal100%.
PressingOKreturnsto
gasentry.
Air=0%
UPDNOK
Argon=0%
UPDNOK
MAINMENU
I/OFLODSPEXIT
FLOWMENU1
DGNUNTFM2EXIT
Err:Mix=(110%)
OK
Err:Max5gas
OK
Methane=65%
UPDNOK
Hydrogen=0%
UPDNOK
Butane=0%
UPDNOK
Nitrogen=5%
UPDNOK
Showsonlyifnoerroris
detected.PressingOK
allowsexittomenu.
Showsonlyiftoomany
gasesareselected.
Onlyfive(5)gasesare
allowed.PressingOK
returnstogasentry.
SelectuptofivegasesforGas
Mix.Besuremixtureequals100%.
OR OR
Helium=0%
UPDNOK
Ethane=0%
UPDNOK
GAS=Methane
NXTOK
TM100
17
Introduction
Fig. 1.7: TM100 Menu Tree - Gas-Mix TM Menu

TM100 Introduction
18
3124.6 SCFM
CSV = 0.3432 Volt
Enter: Press F1 & F2 at the same me
Press F4 to return to normal mode
Screen 10
Screen 11
Screen 12
Screen 13
Pulse=1234.5 cnt
mA_420=5500 cnt
Screen 14
Elp=12.5 HR
Stat(hex)=2800
Screen 15
Alm=None
TM100 v8.2
Screen 16
Screen 17
MB_Sn=P23949
BB_Sn=P23945
Screen 18
MTR_Sn=123456
SNS_Sn=234567
Screen 19
TmpHi=0.0 C
TmpLo=0.0 C
F2 KeyF1 Key
Pwr_Cycl=24
Err_tot=0
FloHi=0.00 SCFM
FloLo=0.00 SCFM
TM-Cal = 0.1
Flow rate measured by the meter
Current Sense Voltage of sensor measurement circuit
Digital control counts of Pulse output
Digital control count of 4-20mA output
Elapsed me of meter operaon
Meter funcon and operaon status code
Meter’s acve alarms
Firmware version of meter
Main board serial number
Bridge board serial number
Meter serial number
Sensor serial number
Alarm seng
Alarm seng
Alarm seng
Alarm seng
Total number of power cycles
Number of errors in total flow measurement
TM-Cal™ measurement value
Fig. 1.8: TM100 Menu Tree - Engineering Screens
3124.6SCFM
csv=0.3432Volt
EnterLogMenu:PressF1&F2atthesametime
PressF4toreturntonormalmode
Display10
Display11
Display12
Display13
Pulse=1234.5cnt
mA_420=234cnt
Display14
Elp=12.5HR
Stat(hex)=2800
Display15
Alarm=None
FT4XV5.3
Display16
Display17
MB_Sn=P23949
BB_Sn=P23945
Display18
MTR_Sn=123456
SNS_Sn=234567
Display19
TmpHi=0.0°F
TmpLo=0.0°F
F3&F4pressedatthesametimewill
initiatea"Total"reset
Pwr_Cycl=24
Err_tot=0
FloHi=0.00SCFM
FloLo=0.00SCFM
CAL‐V=0.1
PwrOff=48.0
LOGMENU1
LOGTOTENGEXIT
Day1=0SCF
NXTPRVEXIT
Day40=0SCF
NXTPRVEXIT
4024‐hourtotalslisted
PressF1tonavigateup
PressF2tonavigatedown
PressF4toreturntonormalmode
Flowratemeasuredbythemeter
CurrentSenseVoltageofsensormeasurementcircuit
DigitalcontrolcountsofPulseoutput
Digitalcontrolcountof4‐20mAoutput
Elapsedtimeofmeteroperation
Meterfunctionandoperationstatuscode
Meter’sactivealarms
Firmwareversionofmeter
Mainboardserialnumber
Bridgeboardserialnumber
Meterserialnumber
Sensorserialnumber
Alarmsetting
Alarmsetting
Alarmsetting
Alarmsetting
Totalnumberofpowercycles
Numberoferrorsintotalflowmeasurement
CAL‐Vmeasurementvalue
Elapsedtimeofmeterpoweroffinhours
ResetTotal?
NOYES
ResettingTotal

Fig. 1.9: TM100 Menu Tree - Reset Flow Total

Welcome
Thank you for purchasing the TM100 Thermal Gas Mass Flow Meter from Sierra Instruments. The
TM100 is one of the most technically advanced flow meters in the world. Extensive engineering
eort has been invested to deliver advanced features, accurate measurement performance, and
outstanding reliability.
This instruction manual contains the electrical and mechanical installation instructions as well as
details for programming, maintaining and troubleshooting the meter. This manual is divided into
the following sections: Introduction, Installation, Wiring, Operation, Communications, Maintenance,
Appendices, Definitions, and Index.
Theory of Operation
The TM100 is an innovative thermal mass gas flow meter and temperature transmitter. It is
microprocessor-based and field programmable. The TM100 thermal sensor operates on the law
that gases absorb heat. A heated sensor placed in an air or gas stream transfers heat in proportion
to the stream’s mass velocity. There are two sensor elements. One sensor element detects the
gas temperature and a second element is maintained at a constant temperature above the gas
temperature. The energy transferred from the heated element is proportional to the mass flow
velocity. The TM100 flow meter maintains accurate flow measurement over a large temperature and
pressure range.
Mass Flow
The TM100 measures mass flow; an advantage over other flow meters which measure volumetric
flow rate. Volumetric flow is incomplete because temperature and pressure are unknown and
must be measured separately. For example, the mass flow of a gas depends on its temperature
and pressure. As temperature and pressure changes, the gas volume changes but not its mass.
Therefore a device measuring mass flow is independent of temperature and pressure changes. The
TM100 provides a direct measurement of gas flow in mass units (kg/hr, lb/hr), standard units (SCFM,
SLPM) or normal units (NM3/hr, NLPM) with no additional temperature or pressure measurements
required.
Calibration Validation
Validate the calibration of the TM100 in the field using the TM-Cal™ test. The goal of Calibration
Validation is to provide operators with the ability to verify that the meter is capturing accurate data
at scheduled recalibration times - or at any time - instead of sending the meter back to the factory
for recalibration. By performing TM-Cal™ in the field, operators can verify that the meter is running
accurately by testing the functionality of the sensor and its associated signal processing circuitry.
This test can be done in the pipe under normal process conditions.
TM100
19
Introduction

Flow Calibration
Every TM100 flow meter is set to the customer's configuration at the factory using an App ID which
is generated by the on-line configurator. The App ID specifies the gas type, flow range, serial
communication and other settings in the meter. If these settings match the final customer application,
the meter is ready to use. Sierra Instruments maintains instrument calibration data on every flow meter.
Calibration files include details on process conditions, customer gas, line size and other information.
All NIST-traceable equipment utilized for the calibration procedure is identified on the Calibration
Certificate, which is sent with every flow meter.
I/O Description
Sierra’s TM100 features a galvanically isolated 4-20mA analog output with HART communication
option on the first channel. The second channel can be a pulse/alarm output, or a serial communication
option for MODBUS RTC (RS-485) or BACnet MS/TP (RS-485). There is also a USB port for interfacing a
laptop or computer.
Sierra’s TM100-View is a free PC-based software program that interfaces to the TM100 through the
USB port. TM100-View can be used to display flow meter readings and change the configuration. The
software is available for download on Sierra Instrument website. .
TM100 Introduction
20