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Device Setup 

January 2023 

• 

Rev. 0 

• Standard Devices User Manual

 25

STP/NTP Reference Values 

Mass Flow Devices

MENU 

→ 

SETUP 

 Sensor 

 STP 

Flow Ref 

or

 NTP Flow Ref

A mass flow device references a given temperature and 

pressure combination to calculate flow. Standard mass flow 

uses an STP (standard temperature and pressure) reference 

point and normal mass flow uses an NTP (normal temperature 

and pressure) reference point. Depending on the engineering 

units selected, either STP or NTP will be editable from this 

menu. For example, if SLPM (Standard liters per minute) is 

selected, STP is editable. If NLPM (normal liters per minute) is 

selected, NTP is editable.

Reference options:

• 

Stan T

:

 Standard Temperature

• 

Stan P

:

 Standard Pressure

• 

Norm T

:

 Normal Temperature

• 

Norm P

:

 Normal Pressure

• 

Ref temp units

 changes the temperature 

units used for STP and NTP calculations. 

• 

Ref pressure units 

changes the pressure 

units used for STP and NTP calculations

Unless otherwise requested, your flow controller ships with 

a default STP of 25°C and 1 atm (which affects flow units 

beginning with “S”), and an NTP of 0°C and 1 atm (which affects 

flow units beginning with “N”).

 

!

 

Caution:

 Changes to STP or NTP references 

alters your mass flow readings.  

Flow and Pressure Averaging

MENU 

→ 

SETUP 

 Sensor 

 Flow Averaging

MENU 

→ 

SETUP 

 Sensor 

 Pressure Averaging

Averaging the flow over a longer time may be useful in 

smoothing fluctuating readings. This menu changes the 

time constants of the geometric running averages for flow 

and pressure. Values roughly correspond to the time constant 

(in milliseconds) of the averaged values. Higher numbers 

generate a greater smoothing effect. The device is capable 

of a maximum 255 ms.

Zero Band

MENU 

→ 

SETUP 

 Sensor 

 Zero Band

The zero band threshold is an amount of flow or pressure 

under which measurements are displayed as 0. The maximum 

zero band is 6.38%. For example, a 20 SLPM controller with a 

zero band value of 0.25% displays as 0 SLPM for all readings 

below 0.05 SLPM. This function also applies to gauge pressure 

readings when using the optional barometer.

Totalizer Options 

Flow Devices

 

The totalizer measures the total flow over a given time and 

is one of the display screens. For more information on the 

totalizer display, se

page 14

.

Totalizer Mode

MENU 

 SETUP 

 Sensor 

 Totalizer 

 

Totalizer 1 

or

 Totalizer 2 

 Mode

All devices have 2 options for calculating flow:

•  Positive Flow Only:

 The totalizer only counts 

flow that passes left to right through the flow body 

of the device. If any negative flow (right to left) 

moves through the system, it is not counted.

•  Reset After No Flow:

 When flow is completely 

stopped, the totalizer holds the current value 

of the measured flow until flow begins again. 

Once flow begins, the totalizer resets to zero.

Bidirectional dual valve controllers can have 2 further options 

for calculating flow:

•  Negative Flow Only:

 The totalizer only counts negative 

flow (flow that passes right to left through the flow body 

of the device). Positive flow (left to right) is not counted.

•  Bidirectional:

 The totalizer adds flow that 

moves positively through the system and 

subtracts flow that moves negatively.

Totalizer Limit and Format

MENU 

 SETUP 

→ 

Sensor

 → 

Totalizer

 → 

Totalizer 1 

or

 Totalizer 2

 → 

Limit and Format 

The totalizer can report up to a maximum of 10 digits. By 

default, it uses 7 digits and the placement of the decimal is 

the same as the live flow rate. 
The limit of the totalizer sets where the decimal is placed 

in the total amount of measured flow. Most devices can 

be configured to measure to the hundredths position. It is 

possible to limit measurement to a length of time. The options 

allow for as little as 10 minutes to as long as 10 years. When 

set, the totalizer measures the flow for that length of time and 

then stops until reset. How the totalizer reacts is based on 

the 

Totalizer Limit

 settings.

Configuring the zero band.

Adjusting the flow averaging 

time constant.

Totalizer options.

Totalizer 

Limit and 

Format

 

screen.

Содержание ALICAT SCIENTIFIC M Series

Страница 1: ...OPERATING MANUAL FOR STANDARD FLOW AND PRESSURE DEVICES Models M MC P PC L LC...

Страница 2: ...d the Limited Lifetime Warranty Fill out the Service Request Form at alicat com service or contact us directly when it is time to send in your device for recalibration For devices ordered with CSA ATE...

Страница 3: ...rol Loop 20 Controlled Variable 20 PD PDF or PD I Control Algorithms 21 Flow Limit while Controlling Pressure Flow Controllers 21 Control Deadband for Pressure Control 22 Device Setup 23 Gas Selection...

Страница 4: ...7 Maintenance 38 Cleaning 38 Repair 38 Recalibration 38 Appendix A Pinouts 39 8 Pin Mini DIN Default 39 Locking Industrial Connector Pinout 39 9 Pin D Sub Connector Common Pinouts 40 15 Pin D Sub Conn...

Страница 5: ...ight page 11 Change your STP to match any standard temperature and pressure reference for your mass flow page 25 Log data to your PC with a serial data connection to control the device and capture dat...

Страница 6: ...SETUP Sensor Totalizer 1 or Totalizer 2 See page 25 Connectors and Buttons The drawing to the right represents a typical configuration of a standard controller Your device s appearance and connection...

Страница 7: ...and process connection if present For pressure controllers refer to Appendix C page 45 for diagrams on plumbing specific controllers Face seal fittings do not need Teflon tape applied to the threads...

Страница 8: ...5 12 Vdc Output as the standard 0 5 Vdc analog output signal Pin 2 is normally a constant 5 12 Vdc Controller 8 Pin Mini DIN Pinout Meter and Gauge 8 Pin Mini DIN Pinout Pin Function Pin Function 1 No...

Страница 9: ...r gauge remotely by momentarily grounding pin 4 When the switch is closed the device tares Operation resumes when the switch is released You can also tare with the front controls page 12 or serial com...

Страница 10: ...the upstream bleed port screw 1 to 2 turns or until liquid begins to leak from the threads Do not remove the screw as it has pressure behind it is very small easy to lose and delicate to rethread 2 G...

Страница 11: ...se button 5 Pressure and liquid devices do not measure mass flow Highlight temperature mass flow and liquid devices use button 2 Pressure devices do not measure temperature Changing the setpoint contr...

Страница 12: ...W BEFORE PRESSING TARE may display on some devices If so press TARE to confirm taring the flow Taring Pressure TARE PRESS or MENU TARES TARE PRESS Taring pressure requires the device to be open to atm...

Страница 13: ...anti corrosive line of mass flow devices As soon as you press SET from the gas list your device reconfigures its flow rate calculations to the newly selected gas properties There is no need to restart...

Страница 14: ...17 for setpoint instructions NEXT moves to the totalizer screen if enabled or MENU opens the device menu Totalizer Screens Flow Devices MENU SETUP Sensor Totalizer Totalizer 1 or Totalizer 2 Mass flow...

Страница 15: ...tions RED Parameters are displayed in red when its value exceeds 128 of the device s specifications YELLOW Menu items that are ready to be selected appear in yellow The color replaces the symbol in se...

Страница 16: ...Initials of the person who calibrated the device SW Firmware version Device Full Scale Ranges MENU ABOUT Full Scale Ranges This displays the maximum calibrated range of available flow and pressure re...

Страница 17: ...e taring Delay Before Tare manages how much time the controller waits before taring Make sure the delay provides enough time for the process to stop flow and settle Caution Auto tare typically is not...

Страница 18: ...tpoint Limits The setpoint limits menu configures upper and lower limits for selecting a setpoint By default the limits are the controller s measuring range but more strict limits may be beneficial in...

Страница 19: ...t volume of gas flows through the controller the valve closes and flow stops You can repeat batches with a single button press To utilize batching at least one totalizer must be enabled The BATCH butt...

Страница 20: ...n the main display and or as part of transmitted serial data There are four valve display options None No valve information is displayed Main Screen Only on the main display Digital Data Only in the s...

Страница 21: ...ill predict needed future corrections based on the current rate of change in the system This often results in slowing the system down to minimize overshoot and oscillations Troubleshooting Valve Perfo...

Страница 22: ...OL Control Deadband Deadband The controller must first reach the setpoint for the deadband to engage If the process variable drifts outside a deadband limit active control resumes until the setpoint i...

Страница 23: ...erties and exits to the setup menu COMPOSER Gas Mixes MENU SETUP Active Gas COMPOSER Mixes To remain accurate your mass flow device needs to reference the viscosity of the gas you are flowing through...

Страница 24: ...a second page use the PAGE button to see the remaining list Viewing Deleting and Creating Similar Mixes MENU SETUP Active Gas COMPOSER Mixes Select mix INFO The current configuration of any existing C...

Страница 25: ...troller with a zero band value of 0 25 displays as 0 SLPM for all readings below 0 05 SLPM This function also applies to gauge pressure readings when using the optional barometer Totalizer Options Flo...

Страница 26: ...lizer Digital Data MENU SETUP Sensor Totalizer Totalizer 1 or Totalizer 2 Digital Data This setting enables the device to report the totalizer value whenever it is polled by the serial terminal page 2...

Страница 27: ...d can be set in seconds up to 99999 9 seconds 1 day 3 hours 46 minutes 39 9 seconds Baud Rate SETUP RS 232 Serial or RS 485 Serial Baud Rate Baud rate is the speed at which digital devices transfer in...

Страница 28: ...will be on when the device powers on On color displays press LESS BRIGHT or BRIGHTER to adjust the brightness level Display Rotation MENU SETUP Display Display Rotation The device has the option of in...

Страница 29: ...l Alicat devices Within its features is a terminal that allows for direct serial communication with connected devices Flowvision 2 0 can be downloaded along with its user manual from alicat com flowvi...

Страница 30: ...nual taring can be accomplished through two separate commands for flow and pressure Taring flow sets the zero flow reading and must be done when no flow is passing through the device Tare flow unit_id...

Страница 31: ...POSER gas mixes have a mix number between 236 and 255 Choose a user mix unit_idGGas Number Example AG255 reconfigures for user mix 255 Defining a new COMPOSER gas mix is faster using serial commands t...

Страница 32: ...red_unit_id Set streaming interval unit_idNCS number_of_ms Query live data info unit_id D Manufacturer info unit_id M Firmware version unit_idve Lock the front display unit_idL Unlock the display unit...

Страница 33: ...RTU Serial Protocol Alicat uses the Modbus standard of offsetting registers by 1 from addresses meaning register 1 is equivalent to address 0 However some systems expect data to be mapped as 0 indexed...

Страница 34: ...send a command to register 1000 without sending an argument to 1001 the device will interpret the command with a default argument of 0 At any time after sending a special command to registers 1000 10...

Страница 35: ...Controllers 0 65535 10 Change I in PID Loop 0 Mass Flow Controllers 1 Mass Flow and Liquid Controllers 2 PSID Controllers 3 Abs Press Controllers and Mass Flow Controllers 4 Gauge Pressure Controller...

Страница 36: ...ering Units From this menu you can adjust any variable s units For more information see page 24 Issue My controller won t reach its setpoint Action This is often caused by not enough supply pressure i...

Страница 37: ...o check before changing gases or liquids is the chemical and material compatibility of the gas being used with the wetted materials inside the controller We also recommend contac ting suppor t page 2...

Страница 38: ...device can be cleaned with a soft dry cloth Warning If you suspect that debris or other foreign material has entered your device do not take apart the flow body to clean it Please contact support for...

Страница 39: ...Serial RS 232 RX RS 485 Input Signal receive 3 Serial RS 232 RX RS 485 Input Signal receive 4 Analog Setpoint Input Controllers Remote Tare Meters and Gauges 4 Analog Setpoint Input Controllers Remot...

Страница 40: ...log Out RX or A Analog Out NC Analog Out 3 Ground Analog In NC NC NC Ground NC 4 NC Ground NC NC NC Analog Out NC 5 Power In Ground Power In Ground Ground Power In Ground 6 NC Ground NC Analog Out NC...

Страница 41: ...t Input Controllers Ground to Tare Meters and Gauges Analog Setpoint Input Controllers Ground to Tare Meters and Gauges 5 Serial RS 232TX RS 485 output signal send Serial RS 232TX RS 485 output signal...

Страница 42: ...r L s SL s NL s Liter per second LPM SLPM NLPM Liter per minute L h SL h NL 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 NC...

Страница 43: ...2 150 Bio30M 30 CH4 70 CO2 151 Bio35M 35 CH4 65 CO2 152 Bio40M 40 CH4 60 CO2 153 Bio45M 45 CH4 55 CO2 154 Bio50M 50 CH4 50 CO2 155 Bio55M 55 CH4 45 CO2 156 Bio60M 60 CH4 40 CO2 157 Bio65M 65 CH4 35 CO...

Страница 44: ...Deuterium D2 Ethane C2H6 Ethylene Ethene C2H4 Helium He Hydrogen H2 Krypton Kr Methane CH4 Neon Ne Nitrogen N2 Nitrous Oxide N2O Oxygen O2 Propane C3H8 Sulfur Hexafluoride SF6 1 Xenon Xe Breathing Gas...

Страница 45: ...lenoid is energized pressure is delivered to the shutoff valve causing it to open When the solenoid is returned to a relaxed state the gas vents to atmosphere allowing the shut off valve to close Pres...

Страница 46: ...re Differential Pressure Control Differential pressure controllers have two ports for connecting to points in the system where the differential pressure is measured The upstream port is for the higher...

Страница 47: ...menus available on the screen Integration of the vacuum sensor control valve and PID algorithm in a single device eliminates the need for an external vacuum sensor and throttle valve in your system T...

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