TSI Instruments 4000 Series Guide

Mass Flowmeters
TSI Series 4000/4100
High Performance
Linear OEM Mass Flowmeter
(TSI Models 4021, 4024,
4121, and 4122)
Design Guide
1980430, Revision H
August 2010

SHIP/MAIL TO:
TSI Incorporated
500 Cardigan Road
Shoreview, MN 55126-3996
USA
USA
Sales and Customer Service:
[phone]/[phone]
Fax:
[phone]
E-mail address:
[e-mail]
Website:
http://flowmeters.tsi.com
INTERNATIONAL
Sales and Customer Service:
([phone]
Fax:
([phone]

3
Copyright
TSI Incorporated / 2004-2010 / All rights reserved.
LIMITATION OF WARRANTY AND LIABILITY (effective July 2000)
Seller warrants the goods sold hereunder, under normal use and service as described in the
operator's manual, shall be free from defects in workmanship and material for 90 days for OEM
components, 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:
a. Batteries and certain other components when indicated in specifications are warranted for
a period of 90 days from the date of shipment to the customer.
b. 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.
c. 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.
d. 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. All goods returned under warranty shall be at the Buyer’s risk of loss, Seller’s
factory prepaid, and will be returned at Seller’s risk of loss, Buyer’s factory prepaid.
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.

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 NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL,
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 as they are to our
customers, our service policy is designed to give prompt attention to any problems. If any mal-
function is discovered, please contact your nearest sales office or representative, or call TSI at
[phone] (USA) and (1) 651 490-2811.

i
CONTENTS
Chapter 1 - Models and Accessories..............................................1
Accessories..................................................................2
Model Designations .....................................................3
Chapter 2 - Measurements Available..............................................4
Flow Rate Measurement..............................................4
Temperature Measurement .........................................4
Volume Measurement..................................................5
Chapter 3 - Mechanical Interface.....................................................6
Overall Dimensions......................................................6
Inlet / Outlet Connections.............................................7
Inlet / Outlet Adapter Dimensions................................8
Chapter 4 - Design Considerations, Mechanical ...........................9
Important Safety Notes................................................9
Filtration Requirements................................................9
Inlet / Outlet Screens .................................................10
Inlet Flow Conditioning...............................................11
Liquids........................................................................11
Flow Reversal/Direction - Pumps...............................12
Mounting Orientation..................................................12
Pressure Drop............................................................12

ii
Chapter 5 - Design Considerations, Electrical............................ 13
Power Requirements................................................. 13
Grounding Scheme................................................... 13
Output Signal, Analog............................................... 13
Digital Interfaces........................................................ 14
Pin-out for Mini-DIN Connector................................. 16
Chapter 6 - I/O Signal Description................................................ 18
RS-232 Bi-Directional Interface................................. 18
Analog Output of Mass Flow Rate............................ 18
Optional User-Supplied Pressure Signal .................. 18
Chapter 7 - Specifications............................................................. 20
Appendix A - Back-Pressure and Barometric Pressure -
Effect on Accuracy................................................ 28
Appendix B - Standard Flow Rate vs. Volumetric Flow rate...... 32
Appendix C - Digital Serial Interface............................................ 34
Command Set Summary........................................... 34
Command Set ........................................................... 38
Error Codes............................................................... 62

1
Chapter 1 - Models and Accessories
The TSI Series 4000/4100 High Performance Linear OEM Mass
Flowmeter is available in the following model numbers: 4021, 4024,
4121, and 4122.
Models 4121
4122

2
Models 4021
4024
Accessories
Interface Cable, mini-DIN -to- tinned wire: TSI Part Number 1303584

3
Model Designations
Model Gas Calibration Flow Range Inlet Adapter Outlet Adapter
40211 Air 0 to 300
standard L/min
22 mm ISO
tapered
Male
22 mm ISO
tapered
Male
40212 Oxygen
40241 Air 0 to 300
standard L/min
0.75 inch
(19.1 mm)
straight
0.75 inch
(19.1 mm)
straight
40242 Oxygen
40246 Nitrogen*
41211 Air 0.01 to 20
standard L/min
0.25 inch
(6.4 mm)
straight
0.25 inch
(6.4 mm)
straight
41212 Oxygen
41216 Nitrogen*
41221 Air 0.01 to 20
standard L/min
0.375 inch
(9.53 mm)
straight
0.375 inch
(9.53 mm)
straight
41222 Oxygen
41226 Nitrogen*
*Nitrogen models are calibrated in air and a nitrogen correction is applied by the meter.

4
Chapter 2 - Measurements Available
Flow Rate Measurement
Flow rate data can be obtained through the linearized analog output
or via the serial interfaces.
Flow rate can be output in units of standard liters per minute (Std
L/min*) or in volumetric units of liters per minute (L/min). Refer to
Appendix C for a description of the two measurements. Selecting
between the two measurements is accomplished through the serial
interfaces. Refer to the Command Set section for instructions.
*TSI instruments define standard conditions as 21.1°C (70° F) and
101.3 kPa (14.7 psia, 1 bar).
Temperature Measurement
These flowmeters have an independent sensor in the flow tube to
measure the gas temperature. The information is used for internal
temperature compensation of the flow sensor element and for
converting flow from standard to volumetric units. This flow