TSI 4140 General Purpose Thermal Mass Flowmeter User Manual

June 5, 2024
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TSI 4140 General Purpose Thermal Mass Flowmeter

TSI-4140-General-Purpose-Thermal-Mass-Flowmeter-
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Copyright
TSI Incorporated / 2003-2022 / All rights reserved.

Address
TSI Incorporated, 500 Cardigan Road, Shoreview, MN 55126 USA

WARNING
TSI® Incorporated flow meters employ a heated platinum sensor. They should not be used with flammable or explosive gasses or mixtures.

CAUTION
TSI® Incorporated flow meters are not medical devices under FDA 510k and in no situation should they be utilized for human respiration measurements.

LIMITATION OF WARRANTY AND LIABILITY
(effective February 2015) (For country-specific terms and conditions outside of the USA, please visit www.tsi.com.)

Seller warrants the goods, excluding software, sold hereunder, under normal use and service as described in the operator’s manual, to be free from defects in workmanship and material for 12 months, or if less, the length of time specified in the operator’s manual, from the date of shipment to the customer. This warranty period is inclusive of any statutory warranty. This limited warranty is subject to the following exclusions and exceptions:

  1. Hot-wire or hot-film sensors used with research anemometers, and certain other components when indicated in specifications, are warranted for 90 days from the date of shipment;
  2. Pumps are warranted for hours of operation as set forth in product or operator’s manuals;
  3. Parts repaired or replaced as a result of repair services are warranted to be free from defects in workmanship and material, under normal use, for 90 days from the date of shipment;
  4. Seller does not provide any warranty on finished goods manufactured by others or on any fuses, batteries or other consumable materials. Only the original manufacturer’s warranty applies;
  5. This warranty does not cover calibration requirements, and seller warrants only that the instrument or product is properly calibrated at the time of its manufacture. Instruments returned for calibration are not covered by this warranty;
  6. This warranty is VOID if the instrument is opened by anyone other than a factory authorized service center with the one exception where requirements set forth in the manual allow an operator to replace consumables or perform recommended cleaning;
  7. This warranty is VOID if the product has been misused, neglected, subjected to accidental or intentional damage, or is not properly installed, maintained, or cleaned according to the requirements of the manual. Unless specifically authorized in a separate writing by Seller, Seller makes no warranty with respect to, and shall have no liability in connection with, goods which are incorporated into other products or equipment, or which are modified by any person other than Seller.

The foregoing is IN LIEU OF all other warranties and is subject to the LIMITATIONS stated herein. NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE. WITH RESPECT TO SELLER’S BREACH OF THE IMPLIED WARRANTY AGAINST INFRINGEMENT, SAID WARRANTY IS LIMITED TO CLAIMS OF DIRECT INFRINGEMENT AND EXCLUDES CLAIMS OF CONTRIBUTORY OR INDUCED INFRINGEMENTS. BUYER’S EXCLUSIVE REMEDY SHALL BE THE RETURN OF THE PURCHASE PRICE DISCOUNTED FOR REASONABLE WEAR AND TEAR OR AT SELLER’S OPTION REPLACEMENT OF THE GOODS WITH NON-INFRINGING GOODS. TO THE EXTENT PERMITTED BY LAW, THE EXCLUSIVE REMEDY OF THE USER OR BUYER, AND THE LIMIT OF SELLER’S LIABILITY FOR ANY AND ALL LOSSES, INJURIES, OR DAMAGES CONCERNING THE GOODS (INCLUDING CLAIMS BASED ON CONTRACT, NEGLIGENCE, TORT, STRICT LIABILITY OR OTHERWISE) SHALL BE THE RETURN OF GOODS TO SELLER AND THE REFUND OF THE PURCHASE PRICE, OR, AT THE OPTION OF SELLER, THE REPAIR OR REPLACEMENT OF THE GOODS. IN THE CASE OF SOFTWARE, SELLER WILL REPAIR OR REPLACE DEFECTIVE SOFTWARE OR IF UNABLE TO DO SO, WILL REFUND THE PURCHASE PRICE OF THE SOFTWARE. IN NO EVENT SHALL SELLER BE LIABLE FOR LOST PROFITS, BUSINESS INTERRUPTION, OR ANY SPECIAL, INDIRECT, CONSEQUENTIAL OR INCIDENTAL DAMAGES. SELLER SHALL NOT BE RESPONSIBLE FOR INSTALLATION, DISMANTLING OR REINSTALLATION COSTS OR CHARGES.

No Action, regardless of form, may be brought against Seller more than 12 months after a cause of action has accrued. The goods returned under warranty to Seller’s factory shall be at Buyer’s risk of loss, and will be returned, if at all, at Seller’s risk of loss. Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY, which contains the complete and exclusive limited warranty of Seller. This LIMITATION OF WARRANTY AND LIABILITY may not be amended, modified or its terms waived, except by writing signed by an Officer of Seller.
Service Policy
Knowing that inoperative or defective instruments are as detrimental to TSI attention to any problems. If any malfunction is discovered, please contact your nearest sales office or representative, or call TSI’s Customer Service department at 800-680-1220 (USA) or (001 651) 490-2860 (International) or visit www.tsi.com.

Trademarks
TSI and the TSI logo are registered trademarks of TSI Incorporated in the United States and may be protected under other country’s trademark registrations. HyperTerminal is a registered trademark of Hilgraeve, Incorporated. Windows is a registered trademark of Microsoft Corporation.

Unpacking and Parts Identification

Carefully unpack the instrument and accessories from the shipping container. Check the individual parts against the list of components in Table 1. If any parts are missing or damaged, notify TSI® Incorporated (TSI®) immediately.

Qty

|

Item Description

| Part/ Model
---|---|---
1| Mass Flow meter, 0.25 inch inlet/outlet (Air, Oxygen, Nitrogen)

Mass Flow meter, 0.25 inch inlet/outlet

(Air, Oxygen, Nitrogen, Nitrous Oxide)* Mass Flow meter, 0.375 inch inlet/outlet

(Air, Oxygen, Nitrogen)

Mass Flow meter, 0.375 inch inlet/outlet (Air, Oxygen, Nitrogen, Nitrous Oxide)*

| 4140

41403

4143

41433

1| Filter

Model 4140: 60 mm ULPA filter with 0.25 inch barbed fittings

Model 4143: 63 mm HEPA filter with 0.375 inch

barbed fittings

|

1602317

1602342

1| AC Adapter

100 to 240 V, N. America NEMA 5-15 plug, grounded 100 to 240 V, Europlug, CEE 7/16, grounded

100 to 240 V, Great Britain, grounded, fused

100 to 240 V, Australia/NZ

|

8918-NA

8918-EC

8918-GB

8918-AT

1| Operation and Service Manual for Model 4140/4143| 1980383
1| RS232 Serial Command Set Manual, 4000/4100| 1980340

Other than the specifications in Appendix A, all references to 4140 and 4143in this manual apply to the 41403 and 41433, respectively.

Item Description Part/Model
Computer Cable, mini-DIN to 9-pin RS-232 1303583
Analog Cable, mini-DIN to cable with tinned wires 1303584
Carrying Case for Model 4140/4143 1319201

Parts Identification

  1. On/Off Switch
  2. Display
  3. Mounting Inserts (2)
  4. DC Power Input
  5. Flow Inlet
  6. Computer Serial Interface, Analog Output, and Optional Power Input Connection

Setting-Up

Supplying Power
The flow meter can be powered in one of two ways: through the power jack using the supplied AC adapter or through the mini-DIN connector. The DC power input connector is shown below along with the power requirements. Power Supply: 7.5 VDC ± 1.5 V, 300 mA maximum

When supplying power through the optional TSI® interface cable, line up the arrow on the connector with the bottom side of the flow meter. Flow meter connector pin-out designations are shown below.

Connector Pin-out and Color Code for TSI® Cable PN 1303584

PIN

|

Function

| Cable Color Code
---|---|---
1| Power Input (+)| Black
2| Power Ground (-)| Green
3| Analog Output (+)| Red
4| Analog Ground (-)| Brown
5| (no connection)| Blue
6| RS232 Receive (in)| White
7| RS232 Transmit (out)| Yellow
8| Logic Ground| Gray

Connecting Filter and Flow Tubes
The Model 4140/4143 has a thermal sensor exposed to the gas flow that must be protected from foreign matter and particles. TSI® supplies a filter that should be connected to the inlet of the flow meter, however, any filter will work as long as it has a minimum efficiency of 99.9%.

CAUTION
Always use a filter on the inlet of the flow meter. Failure to filter the gas flow may change the calibration and/or permanently damage the sensor.

NOTICE
Flow direction is identified by the large arrow printed on the bottom side of the flow meter.

After attaching the filter connect the flow tube to the inlet of the filter. Connecting a tube to the outlet of the flow meter will create back pressure. See Appendix A for flow meter accuracy specifications when operating at various pressures. In general, minimize back pressure on the flow meter to maintain higher accuracy.

RS232 Configuration and Operation
Many flow meter operating parameters can be easily configured through the RS232 serial port. Likewise, the flow rate, temperature, pressure, and volume can be read through the serial port. Refer to the Series 4000/4100 RS232 Serial Command Set manual for a detailed description of the commands and command syntax.

RS232 Settings:

  • Baud Rate …….. 38.4 k
  • Data Bits ………. 8
  • Parity ……………. None
  • Stop Bits ………. 1
  • Flow Control ….. None

Changeable Operating Parameters

Function Command
Select Gas Calibration air, O2, N2, or N2O (if available) SGn
Select Standard or Volumetric Flow Measurement SUn
LCD Display Update Rate (controls averaging) SURnnnn
Select Measurement Display Scroll Mode SDMFTPn
Select Measurement Displayed on LCD Display SDMm
Select Measurement Units on LCD Display SDUn
Select Data Update Rate for Analog Output SSRnnnn
Set Analog Output Full-Scale Flow Rate Value SASnnn
Set Analog Output Zero Value SAZnnn

Configuration Software
TSI® has several software utilities to help you communicate with your flow meter to change parameters and to obtain flow data. You can download the latest versions of these at no charge from our website: https://tsi.com

  1. If you only want to change one or more of the operating parameters shown in Table 4 (above), the easiest way is to use the software utility called “TSI setup.” This uses convenient dropdown menus to help change these parameters. After you have made your changes, be sure to click on “Send” to store the changes in the flow meter’s memory. TSI-4140-General-Purpose-Thermal-Mass-Flowmeter-4
  2. If you want to communicate directly with the flow meter using the basic RS232 commands shown in the Serial Command Set Manual, you can use a terminal program. HyperTerminal® program is a common terminal program that is included with most versions of the Microsoft® operating system. Setting up HyperTerminal® program to communicate with your flow meter can sometimes be confusing. You can download a document from our web site that helps you configure HyperTerminal®. Download the document called “Using HyperTerminal to communicate with TSI Flow meters.”
  3. If you plan to develop a more sophisticated program for data collection and control using LabVIEW™ program can download a demonstration program called “Real-time Demo Program” and the source code “Source Code for Real-time Demo Program.” This program is intended to be a basic demonstration program and not a practical laboratory tool. It does, however, have a convenient implementation of the VOLUME measurement function that can be useful for basic tests.

Operation

CAUTION
TSI® flow meters ARE NOT medical devices under FDA 510k and in no situation should they be utilized for human respiration measurements.

Overview
The Model 4140/4143 flow meter measures mass flow rate, temperature and absolute pressure of the gas inside the flow tube. All measurements made by the Models 4140/4143 are NIST traceable.

ON/OFF Switch
Slide the switch to the ON position. The power switch is marked in the international symbols ‘|’ for on and ‘O’ for off.

Warm-up Time
The flow meter will provide readings immediately upon power-up. Recommended warm-up time of the flow meter is 5 minutes.

Flow Rate Measurement
Flow rate data can be obtained from the Model 4140/4143 through the LCD display, RS232 serial port, or the linearized analog output. The analog output is a 0 to 10 volt DC linear signal representing 0 to 20 Std L/min. The analog output scaling is user selectable. Refer to the Series 4000/4100 RS232 Serial Command Set manual for instructions on how to obtain flow data through the serial port.
Gas calibrations (air, 100% O2, 100% N2 or 100% N2O) can be selected through the RS232 serial port. Refer to the Series 4000/4100 RS232 Serial Command Set manual. The LCD display will indicate the calibration being utilized: air, O2, N2, or N2O. Flow can be displayed in units of standard liters per minute (Std L/min*) or in volumetric units of liters per minute (L/min). Refer to Appendix B for a description of the two measurements. Selecting between the two measurements is accomplished through the serial port. Refer to the Series 4000/4100 RS232 Serial Command Set manual for instructions on how to select between flow units. The Model 4140/4143 has an independent temperature sensor in the flow tube to measure the gas temperature. The temperature sensor is used for temperature compensation of flow rate and for converting flow from standard to volumetric units. Temperature can also be displayed on the LCD and is available through the RS232 serial port in the units of degrees Celsius (°C).

NOTICE
At low flow rates, the temperature inside of the flow tube will increase because of the heat generated by the thermal flow sensor. This effect is normal and the temperature of the incoming gas will be measured once flow resumes.

Pressure Measurement
The Models 4140/4143 measure absolute pressure near the outlet of the flow meter in the SI units of kilo-Pascals (kPa). Pressure measurements are required when converting from standard to volumetric flow. Absolute pressure can be displayed on the LCD and is available through the RS232 serial port.

Select Measurement Displayed
By using RS232 commands the LCD display can be set up to continuously display either flow rate, temperature, or pressure. See the SDMm command in the Series 4000/4100 Serial Command Set manual.

Display “Scroll” Mode
By using RS232 commands the LCD display can be set up to continuously scroll between flow rate, temperature, and pressure. The scroll rate is adjustable and the user can specify the parameters to be displayed. See the SDMFTPn command in the Series 4000/4100 Serial Command Set manual.

Volume Measurement
These flow meters measure total volume by integrating flow over time. This is a calculated measurement performed by the flow meter and is only available using the RS232 serial port. Volume is not displayed on the LCD display. Refer to the Series 4000/4100 RS232 Serial Command Set manual for instructions on using the volume function.

Maintenance

Flow Sensor
Periodically inspect the flow sensor by looking into the outlet of the flow meter. Remove dust, particles and fibers from the sensor with clean, dry compressed air. The flow sensor will break if touched. Never run liquids through the flow meter and never touch the sensor with a brush. Dust or other deposits on the flow sensor will degrade the 4140/4143 flow meter’s flow accuracy.

CAUTION
The flow meter must be switched off for cleaning. Only use clean, dry, compressed air when attempting to remove contamination from the sensor.

Re-certification
To maintain a high degree of confidence in the measurements made by the Model 4140/4143, TSI® recommends that the instrument be returned to TSI® every 12 months for re-certification. The flow meter will be recalibrated and returned with a certificate of calibration to US National Institute of Standards Technology (NIST) traceable standards. This “annual checkup” assures you of consistently accurate readings; it is especially important in applications where strict calibration records must be maintained.

Cases
If the instrument case or storage case needs cleaning, wipe it off with a soft cloth dipped in isopropyl alcohol or mild detergent. NEVER submerge the flow meter or allow liquids to enter the flow tube.

Storage
When storing the flow meter, always cover the ends of flow tubes with the caps provided to prevent dust or other foreign matter from entering the tube.

Troubleshooting

Table 5 lists the symptoms, possible causes, and recommended solutions for common problems encountered with Series 4100 flow meters. If the symptom is not listed, or if none of the solutions solves the problem, please contact TSI® Customer Support at 1-800-680-1220 or 651-490-2860.

Symptom Possible Causes Corrective Action
No display. Unit not switched on. Switch on the unit.
No power to instrument. Plug in AC adapter or check power source on mini-

DIN connector.
Temperature reads high at low or zero flows.| Temperature sensor is being heated from the flow sensor.| The temperature value will track the actual gas temperature once the flow rate through the flow meter exceeds 1 Std L/min.
Flow readings fluctuate greatly.| The flow is fluctuating.| Improve inlet conditions or increase display averaging time.
Display shows flows over-range with no flow passing through flow tube.| The sensor may be damaged or broken.| Return flow meter to TSI® for service.

Specifications

Flow Measurement

Measurement Range …….

Accuracy

Air and 100% O2 …………….

| 0.01 to 20 Std L/min.


2% of reading or .005 Std L/min, whichever is greater.

3% of reading or .010 Std L/min, whichever is greater, see note 1 below.

3% of reading or .010 Std L/min, whichever is greater, see note 1 below.

Accuracy stated at standard conditions (21.1°C and 101.3 kPa)

See notes 2 through 6 below.

0.001 Std L/min between 0.01 and 9 Std L/min

0.01 Std L/min between 9 and 20 Std L/min

Less than 4 msec, 63% of final value at full scale flow

100% N2 ………………….
100% N2O ……………….

(41403 and 41433 only)


Resolution (Display)………

Response…………………….
Temperature Measurement
Measurement Range …….| 0 to 50°C
Accuracy ……………………..| ±1°C, at flows greater than 1 L/min. See note

3 below.

Resolution (Display)………| 0.1°C
Response…………………….| Less than 75 msec, 63% of final value for 20°C step change in temperature at full scale flow
Static Pressure Measurement (Measured inside flow tube near the exit)
Measurement Range …….

Accuracy ……………………..

Resolution (Display)………

Response…………………….


Over Pressure………………

| 50 to 199 kPa Absolute

±1 kPa, See notes 8 and 9 below.

0.1 kPa

Less than 4 msec.

63% of final value for 30 kPa step change 620 kPa

Burst Pressure
Tested to 690 kPa without rupture. DO NOT exceed 690 kPa.
Pressure Drop
See chart.
Volume

Measurement Range …….

Accuracy

Air and 100% O2 ………


100% N2 ………………….


100% N2O ……………….

(41403 and 41433 only)

| 0.001 to 99.99 Liters


2% of Reading at flows greater than

2.5 Std L/min

3% of Reading at flows greater than

2.5 Std L/min

3% of Reading at flows greater than

2.5 Std L/min

See notes 2 through 6 below.

Instrument Temp. Range
Operation, Ambient………

Storage, Ambient…………

| 0 to 50°C

-20 to 60°C

Gas Calibrations
Air, O2, N2, N2O (41403 and 41433 only), User selectable through serial port
Physical Dimensions
External Dimensions…….

Tube Adapters …………….

(Inlet & Outlet)

Weight ……………………….

Flow Body Material ………

Mounting Threads………..

| See diagram

Model 4140/41403: 0.25 inch O.D. straight Model 4143/41433: 0.375 inch O.D. straight 86 grams

Polycarbonate

6-32, 0.25 in. (6 mm)

Computer Interface
Connector …………………..

Type ………………………….

Baud Rate ………………….

Data Bits …………………….

Parity …………………………

Stop Bits …………………….

Flow Control ……………….

| 8 pin mini-DIN RS232 Serial 38,400

8

None 1

None

Analog Output (Flow Only)
Range………………………..

Resolution ………………….

Maximum Current ………..

Flow Accuracy …………….

| 0 to 10 V

13 bit

5 ma

See note 7 below.

Power
AC adapter or power supplied through mini-DIN

7.5 VDC ± 1.5 V, 300 mA maximum

NOTES:

  1. Nitrogen and Air/O2 gas mixtures are corrections from the Air calibration.
  2. Accuracy stated at standard conditions of 21.1°C and 101.3 kPa.
  3. Add an additional 0.0003 Std L/min or 0.075% of reading, whichever is greater, per 1°C away from standard conditions when operating within the range of 0°C to 50°C.
  4. Add an additional 0.015% of reading per 1 kPa above 101.3 kPa or
  5. Add an additional 0.022% of reading per 1 kPa below 101.3 kPa when operating within the pressure range of 70 kPa to 101.3 kPa.
  6. Accuracy stated with gas temperature and flow body temperature within ±10°C of one another.
  7. Accuracy stated measuring dry gas (less than 10% R.H.).
  8. Includes ±0.5% of reading repeatability.
  9. Volumetric flow rate is calculated from the mass flow measurement. Add an additional 0.25% of reading to the flow accuracy to account for the uncertainty in measuring gas temperature and pressure.
  10. For analog output, accuracy offset increases from 0.005 to .02 Std L/min. To achieve accuracy, analog zero needs to be changed from factory defaults to be 0.020V or higher. See Appendix C.
  11. Add uncertainty of 0.2 kPa for every 10°C away from 21.1°C.
  12. Radiated immunity events can shift absolute pressure reading up to 40%.

TSI-4140-General-Purpose-Thermal-Mass-Flowmeter-5

Standard Flow Rate vs. Volumetric Flow Rate

Since thermal flow sensors are sensitive to changes in air density and air velocity, all thermal flow meters indicate flow rates with reference to a set of standard conditions. For TSI® instruments, standard conditions are defined as 21.1° C (70° F) and 101.3 kPa (14.7 psia). Other manufacturers may use different values. Standard flow rate is the flow rate the air would be moving if the temperature and pressure were at standard conditions. It is usually the most useful measure of airflow because it defines the heatcarrying capacity of the air. Volumetric flow rate is the true volume flow of the gas exiting the flow meter. In some instances, volumetric flow rate rather than standard flow rate may be of interest. To display volumetric flow rate, the Model 4140/4143 will multiply the standard flow measurement by the following density correction factor:

Where Tm = Gas temperature measured in flow tube in units of degrees Celsius Pm = Absolute pressure measured in flow tube in units of kPa To demonstrate the difference in output, consider the following. Measured flow displays 10 Std L/min at 15C and 117kPa. The volumetric flow as calculated by the Model 4140/4143 would be as follows.

Optimal Use of the 4000/4100 Series Analog Out Capability

Introduction
TSI® Incorporated’s 4000/4100 series flow meters have a feature that allows you to determine the flow rate based on a 0-10 Volt Analog out signal. This feature has programmable options that can improve its use accuracy.

Function of the Analog Out Feature
The 4000/4100 series meter has an analog out circuit that outputs a voltage signal that is linearly proportional to the flow measurement displayed on the front screen. The voltage signal has a 0-10 volt range. This output is configurable so the user can change the voltage output at zero flow and at the span flow.

The factory defaults for the analog out are as follows:

  • 0 volts at zero flow
  • 10 volts at span flow (300 SLPM for 4000 Series meters, 20 SLPM for 4100 Series meters)

The graph below shows the factor default relationship. This relationship results in an easy conversion from voltage to flow.

Considerations When Needing to Read Zero and Low Flow Accurately
If the application requires accurate flow measurement at or near zero flows then it is recommended that the zero flow voltage be changed from its factory default of 0 volts to 100 mV. This is due to a slight offset of the ground voltage that could be interpreted as a low-level flow. By setting 100 mV (0.1 V) to be the zero-flow voltage, this gets out of the region around 0 volts (ground) where the slight offset can shift the reading. The graphic below shows the change in zero voltage to move out of the ground region.

NOTICE
The conversion equation changes if the zero is change to 100 mV.

Considerations for Setting the Span Flow Voltage
If the application does not require the flow meter to read up to its span flow then it is recommended that the analog span be set to the maximum limit that is required by the application. This will make for a better voltage to flow conversion due to more resolution per change in measured flow. The graphic compares examples with a span flow set to 300 SLPM (factory default for 4000 Series meters) and a 150 SLPM example. For the factor default settings, each 1 SLPM change in flow will cause a 0.0333 change in voltage. If the application allows for the setting of 150 SLPM span, then for each 1 SLPM change in flow will cause a 0.0666 change in voltage. This will allow the voltage measurement device employed by the customer to be less precise.

Process for Changing the Analog Zero and Span
The TSI® setup program, provided free of charge, makes changing the analog zero and span easy. The graphic below shows where to enter the analog zero and span in the TSI® setup program.

TSI-4140-General-Purpose-Thermal-Mass-Flowmeter-11

Reference the instrument manual for more details on how to use the TSI® setup Optimal Use of the 4000/4100 Series Analog Out Capability

TSI Incorporated – Visit our website www.tsi.com for more information.

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P/N 1980383 Rev K Copyright © 2022 by TSI Incorporated Printed in U.S.A.

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