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Introduction

Introduction 

Your new flow controller has a variety of innovative features:

• 

High-accuracy performance for all your gases.

 Use your flow controller with any of the 

30 calibrated gases

• 

1000 readings per second 

guarantees high resolution data

• 

Monitor live pressure and temperature 

during flow control

• 

Change your STP 

to match any standard temperature and pressure reference

• 

Control pressure while monitoring flow rate

. Set the closed loop control algorithm to 

pressure control

• 

Log data to your PC 

with a serial data connection to control the device and capture data 

for logging and analysis.

• 

Totalize and batch dispense

 flow with high precision

• 

Monitor valve position

 to maintain your process and identify failures before they occur. 

This manual covers the following instruments:

• 

IMC-Series:

 gas mass flow controllers

• 

IM-Series:

 gas mass flow meters.

For support or questions regarding the use or operation of this device, please contact us 

using the information on 

page 2

.

Alicat offers many combinations of device sizes, accessories, connections, and configurations. 

These custom solutions can meet a variety of application challenges brought forth by users 

pushing the boundaries of our standard offerings. If you have an idea for a new process or a 

challenging application, contact Alicat for specialized engineering and application support. 
This manual covers the general operation of factory OEM devices. Custom setups may not 

be covered by this document. If you need further assistance, please contact Alicat support.

Summary of Contents for ALICAT IM

Page 1: ...OPERATING MANUAL FOR MASS FLOW DEVICES Models IM and IMC...

Page 2: ...a 91 022 41248010 Recalibrate your mass flow controller every year Annual calibration is necessary to ensure the continued accuracy of readings and to extend the Limited Lifetime Warranty Fill out the...

Page 3: ...tor valve position to maintain your process and identify failures before they occur This manual covers the following instruments IMC Series gas mass flow controllers IM Series gas mass flow meters For...

Page 4: ...9 Data Format 10 Changing the Setpoint 10 Totalizer 11 Batch Dispensing 11 Changing the Gas 11 Control Loop 11 Command Quick Reference 12 Advanced ASCII Commands 12 Modbus RTU 13 Communicating Via Mo...

Page 5: ...r overrange etc Mounting The flow controller can be mounted in any position including upside down Mount the device so that flow passes through the flow body in the direction shown by the flow arrow Th...

Page 6: ...usly to both sides of the instrument without causing damage Warning Using the flow controller above the maximum specified common pressure will permanently damage the internal pressure sensors If the l...

Page 7: ...s 4 Analog Setpoint Input meters Ground to tare 5 Tx or A Sends RS 232 Tx or RS 485 A signals 6 Analog Signal Output 0 5 Vdc output signal 7 Power in Powers the device 8 Ground Common ground for power...

Page 8: ...tuning to adjust response speed and stability for some applications Establishing Communication To connect your device to FlowVision 2 0 1 Download FlowVision 2 0 from alicat com flowvision and instal...

Page 9: ...unit id command unit_id desired_id Taring the Device Taring gives the device a zero reference for flow measurements ensuring that the device provides its most accurate measurements It is recommended t...

Page 10: ...dable If the device does not receive a valid command it will ignore it If in doubt hit and start again The default streaming interval is 50 ms This can be increased by changing Register 91 while the d...

Page 11: ...use the reset totalizer command unit_idT Additional Totalizer functions and options are available in the Serial Primer manual alicat com manuals Batch Dispensing For controllers batch dispensing flow...

Page 12: ...se a different gas unit_idGgas_number Note For more information on our serial communication commands please see the Serial Primer at alicat com manuals Advanced ASCII Commands The command set on IM de...

Page 13: ...nts are written to 1003 and 1004 The command arguments are variables that influence how the commands modify the device Analog Signals Alternative to the digital communications described above the devi...

Page 14: ...ranges that start at 0 Vdc a no flow condition is output at approximately 0 010 Vdc The full scale of the device is output by the top of the range 5 Vdc for 0 5 Vdc 10 Vdc for 0 10 Vdc or 20 mA for 4...

Page 15: ...lessen this sensitivity by increasing the flow averaging Controllers use PD or PD I control loop algorithms to reach the setpoint given These parameters are adjustable in the field Issue My controlle...

Page 16: ...ility page 2 Serial Communications Issue I can t communicate with the device when it is connected to my PC Action 1 Make sure the baud rate your software and COM port required is the one your flow con...

Page 17: ...erial has entered your device do not take apart the flow body to clean it as this will negate its NIST traceable calibration Please contact support for cleaning page 2 Recalibration The recommended pe...

Page 18: ...oxide 5 C2H6 Ethane 6 H2 Hydrogen 7 He Helium 8 N2 Nitrogen 9 N2O Nitrous Oxide 10 Ne Neon 11 O2 Oxygen 12 C3H8 Propane 13 nC4H10 Normal Butane 14 C2H2 Acetylene 15 C2H4 Ethylene Ethene 16 iC4H10 Isob...

Page 19: ...h Liter per hour US GPM US gallon per minute US GPH US gallon per hour CCS SCCS NCCS Cubic centimeter per second CCM SCCM NCCM Cubic centimeter per minute cm3 h Scm3 h Ncm3 h Cubic centimeter per hour...

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