Dwyer Instruments DFM-39010-V-ALA2, DFM-32010-V-ALA2, DFM-43010-V-ALA2, DFM-37010-V-ALA2, DFM-48010-V-ALA2 User manual

...

Download

Technical Data Sheet No.

TD-DFM-0917

Date of Issue:

1/2/20

OPERATING MANUAL

Dwyer Instruments, Inc. DFM

Digital Multi-Parameter Mass

Flow Meter

www.GlobalTestSupply.com

Dwyer is a registered trademark of Dwyer Instruments, Inc.

NOTE: Dwyer reserves the right to change designs and dimensions at its sole discretion at any time without notice. For certified dimensions, please contact Dwyer.

www.GlobalTestSupply.com

TABLE OF CONTENTS

Unpacking the DFM Mass Flow Meter....................................... 3

1.1 Inspect Package for External Damage...................................3

1.2 Unpack the Mass Flow Meter.................................................3

1.3 Returning Material for Repair.................................................3

Installation..................................................................................3

2.1 Safety Instructions...................................................................3

2.2 Primary Gas Connections.......................................................4

Electrical Connections................................................................6

3.1 Power Supply Connections....................................................7

3.2 Output Signals Connections..................................................7

3.3 Digital Communication Interface Connections.......................8

Principle of Operation..............................................................12

Specifications............................................................................12

5.1 CE Compliance....................................................................14

5.2 DFM Accessories.................................................................14

Operating Instructions...............................................................16

6.1 Preparation and Power Up...................................................16

6.2 Swamping Condition............................................................17

6.3 Meter Process Information (PI) Screens..............................18

6.4 Local User Interface Menu Structure...................................20

6.4.1 Parameter Entry..............................................................21

6.4.2 Submenu “Change PP Password”..................................21

6.4.3 Submenu “Device Information”.......................................22

6.4.4 Submenu “Units of Measure”..........................................22

6.4.5 Submenu “User-Defined Units”.......................................25

6.4.6 Submenu “Select Gas”....................................................27

6.4.7 Submenu “User-Defined Mixture”....................................33

6.4.8 Submenu “Gas Flow Alarm”............................................37

6.4.9 Submenu “Gas Pressure Alarm”.....................................39

6.4.10 Submenu “Gas Temperature Alarm”.............................41

6.4.11 Totalizers Settings.........................................................43

6.4.12 Submenu “Pulse Output”...............................................45

6.4.13 General Settings............................................................46

6.4.13.1 STP/NTP Conditions.................................................46

6.4.13.2 Display and Process Information (PI) Screens.........47

6.4.13.3 Submenu “Communication Port Settings”................50

www.GlobalTestSupply.com

6.4.13.4 S ubmenu “Modbus Interface” (optional)...................52

6.4.13.5 Relay Assignment....................................................54

6.4.13.6 Analog Output Configuration....................................54

6.4.13.7 Status LED Settings.................................................56

6.4.13.8 Signal Conditioner Settings......................................57

6.4.14 Sensor Zero Calibration.................................................57

6.4.14.1 DP Sensor Zero Calibration.....................................58

6.4.14.2 Start AP Auto Tare...................................................59

6.4.15 Submenu “Alarms and Diagnostic”...............................60

6.4.15.1 Alarm Event Register................................................61

6.4.15.2 Diagnostic Events Register......................................65

6.4.15.3 Sensors ADC Reading (read only)...........................68

6.4.15.4 Temperature Sensors Diagnostic (read only)..........69

6.4.15.5 Analog Output & PO Queue Diagnostic (read only).70

6.4.15.6 Reference Voltage & DSP Calculation Diagnostic

6.5 Multi-Functional Push-Button Operation..............................70

7 Maintenance..............................................................................73

7.1 General.................................................................................73

7.2 Cleaning.................................................................................73

8 Recalibration..............................................................................74

9 RS-235/RS-485 Software Interface Commands........................74

9.1 General.................................................................................74

9.2 Commands Structure............................................................74

10 Troubleshooting.......................................................................98

10.1 Common Conditions...........................................................98

10.2 Troubleshooting Guide.......................................................98

10.3 Technical Assistance........................................................101

Appendix I: Component Diagram...............................................102

Appendix II: Dimensional Drawings............................................104

Appendix III: Warranty................................................................106

Appendix IV: Index of Figures....................................................107

Appendix V: Index of Tables......................................................109

.....70

www.GlobalTestSupply.com

UNPACKING THE DFM MASS FLOW METER

1.1

Your DFM Mass Flow Meter was carefully packed in a sturdy cardboard carton, with anti-static cushioning materials to withstand shipping shock. Upon rec eipt, inspect the package for possible external damage. If the unopened package is damaged, contact the shipping company immediately to make a repo rt.

1.2

Open the carton carefully from the top and inspect for any sign of concealed shipping damage. If there is any damage, i n addition to contacting the shipping company, forward a copy of any damage report to your distributor or to Dwyer directly.

When unpacking the instrument, make sure that you have all the items indicated on Packing List. Promptly report any discrepancy.

1.3

Contact the customer service representative at your distributor, or at Dwyer if you purchased your Mass Flow Meter directly, to request a

(RMA). Equipment returned without a RMA will not be accepted.

right to charge a fee to the customer for equipment returned under warranty claims if the instruments are found, when examined and tested, to be free of warrantied defects.

Shipping charges are borne by the customer. Meters returned collect will accepted.

Inspect Package for External Damage

Unpack the Mass Flow Meter

Returning Material for Repair

Return Materials Authorization

the

Dwyer reserves the

not

It is mandatory that any equipment returned for service be purged of any hazardous contents including, but not limited to, toxic, infectious, corrosive or radioactive material. No work shall be performed on a returned product unless the customer submits a fully executed and signed SAFETY CERTIFICATE. Contact the Service Manager at your distributor or at Dwyer to obtain this form prior to returning the product.

2.1

INSTALLATION Safety Instructions

CAUTION

responsibilities of Dwyer Instruments shall be voided if users fail to

follow all instructions and procedures

CAUTION:

use in life cause personal injury. Customers employing this device for use in such applications do so at their own risk and agree to be fully responsible for damages resulting from improper use or sale.

: Dwyer warranties and all

LIFE SUPPORT APPLICATIONS: The DFM is not designed for

support applications where any malfunction of the device may

other direct or implied

described in this manual.

any

www.GlobalTestSupply.com

CAUTION:

may be damaged by improper handling. When adjusting or servicing the

device, always wear a grounded wrist strap to prevent inadver tent damage to

the integral solid-state circuitry.

Some of the IC devices used in the DFM are static-sensitive and

2.2

The DFM Mass Flow Meter will not operate with liquids. Only clean, non corrosive gases may be introduced into the instrument. If gases are contaminated, they must be filtered to prevent the introduction of impediments to the sensor.

For more information, contact your distributor or Dwyer. The DFM Mass Flow Meter can be mounted in any position. It is not required to maintain

straight runs of pipe upstream or downstream of the meter. It is preferable to install the meter in a stable moisture, and drafts.

Prior to connecting gas lines, inspect all parts of the piping system, including ferrules and other fittings, for dust or other contaminants. Do not use pipe grease or sealant on process connections as they can contaminate narrow laminar flow elements that may cause permanent damage to the meter.

W hen connecting the gas system to be monitored, be sure to observe the direction of gas flow as indicated by the arrow on the front of the meter.

Insert tubing into the compression fittings until the ends of the properly sized tubing sit flush against the shoulders of the fittings. Compression fittings are to be tightened 1¼ turns according to the manufacturer's instructions. Avoid overtightening seriously damage the compression fitting.

Primary Gas Connections

CAUTION:

unless specifically cleaned and prepared for such an application.

DFM meters should not be used for monitoring oxygen gas

environment, free of frequent and sudden temperature changes, high

which may

Pressure Requirements

Maximum operating line (common mode) pressure for DFM series flow meters is 120 PSIG (8.3 Bar). If the installation line pressure is more than 120 PSIG (8.3 Bar), a pressure regulator must be installed upstream of the flow meter to bring pressure down to 120 PSIG (8.3 Bar).

CAUTION:

gas line must not exceed 120 PSIG (8.3 bar). Applying pressure above PSIG (8.3 bar) will cause permanent damage to the differential sensor.

For DFM series flow meters, the maximum pressure in the

120

pressure

www.GlobalTestSupply.com

CAUTION: Do not apply upstream – downstream differential pressure

CAUTION: To avoid obstructions and contamination in the sensor

tube and the user should gases. 20

exceeding 12 PSID to DFM series flow meters. Exposure to higher differential pressures may cause permanent damage to the product.

Normally high common mode pressure (within 120 PSIG) will not damage the differential pressure sensor, but pressure transients (momentary pressure variations) on upstream or downstream ports can result in permanent sensor damage to the product.

Avoid instantaneous application of high pressure from quick on/off solenoid valves upstream or downstream of the meter.

CAUTION: The user shall install the instrument only in process lines that meet the DFM meter’s pressure and temperature ratings. A margin of safety should be provided if spikes and surges exist in the process. Proper pressure relief valves and burst plates should be installed in high pressure applications.

narrow flow channels in the laminar flow element, the

install the instrument in process lines that have clean

Upstream particulate filters with maximum particulate size

µ are recommended for all applications.

DFM transducer ports are equipped with 10-32 female thread (DFM-02), 1/8" NPT female thread (DFM-03/05), and 1/4" NPT female thread (DFM-07).

www.GlobalTestSupply.com

ELECTRICAL CONNECTIONS

DFM is equipped with an 8 pin-MiniDIN power, analog/relay output, communication interface connector.

TABLE I: 8-PIN DESIGNATIONS AND NOTES

PIN FUNCTION

1 Solid State SPST Relay NO

(normally open) contact #1

2 Solid State SPST Relay NO

(normally open) contact #2

3 RS-232 RX / RS-485 (–)

Communication Interface input

4 Analog (0-5Vdc,0-10Vdc,4-20

mA) Output reference (-)

5 RS-232 TX / RS-485(+)

Communication Interface input

6 Analog (0-5Vdc, 0-10Vdc or

4-20 mA) Output (+)

7 Power supply, positive (+) 8 Power supply, common (-)

RS-232 Signal Ground

Table I

explains the pin designations. See

NOTE

Do not exceed SSR maximum volt age 48 AC peak/DC and maximum load current 40 0 mA.

Also access i ble via Audio jack con nector (

see Figures 2 & 25)

Common (return) for pin 6 (0-5Vdc or 0-10 Vdc or 4-20 mA)

Also access i ble via Audio jack con nector

see Figures 2 & 25).

( Output. Do not apply exter nal v oltage

current source. Be sure to observe

or any recommende d load

Power input 9 – 26 Vdc. Power input and RS-232 communic ation

common.

Figure 1

for a Pin Diagram

impedance.

CAUTION:

FIGURE 1: DFM 8-PIN Mini-DIN CONNECTOR CONFIGURATION

4-20 mA analog output requires at least 12 Vdc power.

www.GlobalTestSupply.com



NOTE:

The (+) and (-) power inputs are each protected by a 300mA M (medium time fuse unit,

the faulty condition, and reconnect the power. The fuse will

reset once the faulty condition has been

CAUTION: Generally, "Mini-DIN" Connector numbering patterns are standardized. There are, however, some connectors with noncon

forming patterns, so the numbering sequence on your mating

connector may or may not coincide with configuration above. It is imperative that you match the appropriate wires in accordance with the correct sequence regardless of the par

CAUTION:

Make sure power is OFF when connecting or disconnecting

any cables or wires

CAUTION:

exceed the rated values shown in the specifications (see Failure to do so migh if the wiring and the polarity of the power supply turning the power ON. Wiring error may cause damage or faulty operation.

CAUTION:

as this may damage the instrument.

that shown in our pin

ticular numbers displayed on the mat ing connector.

3.1

The AC to DC power supply requirements for DFM transducers are 9 to 26 Vdc, with maximum load current at least 100 mA (unipolar power supply), and maximum ripple below 150 mV P-P.

Power can be applied to the DFM meter either through the power jack (see Figure

49) or the 8-pin Mini-DIN connector (see Figure 1).

Power Supply Connections

Never apply power simultaneously from both connectors,

DC Power (+) --------------- pin 7 of the 8-pin Mi ni -DIN connector

DC Power (-) --------------- pin 8 of the 8-pin Mi ni -DIN connector

CAUTION:

damage the DFM and/or cause faulty operation.

-lag) reset fuse. If a shorting condition or polarity reversal occurs, the will cut power to the flow transducer circuit: disconnect the power to the

correct

Never apply power voltage above 26Vdc. Doing so may

to or from the system.

corrected.

3.2

Output Signals Connections

When connecting the load to the output terminals, do not

t cause damage to this device. Be sure to check

are correct before

www.GlobalTestSupply.com

Section 5).

DFM series Mass Flow Meters are equipped with calibrated 0-5Vdc, 0-10Vdc or

CAUTION:

The 4-20 mA current loop output is self-powered (nonisolated (for example

CAUTION:

When connecting the load to the output terminals, always check actual analog output interface configuration. Connecting low impedance (< 5K damage



CAUTION:

always check actual analog output interface configuration. Connecting high impedance (> 500 may cause non linear or faulty operation of the electronics circuitry.

CAUTION:

connection

actual communication interface type. For devices with OLED display 2 seconds) displayed on the banner screen when power is applied. If your meter does not have can be identified by briefly pressing monitoring status LED

4-20 mA output signals. This linear output signal represents 0-100% of the flow meter’s full scale range. The user may select the desired a nalog interface type using a local OLED/Joystick interface or via digital communication interface.

, sourcing type). Do not connect an external voltage source

, current loop powered systems) to the output signals.

For 0-5 VDC, 0-10 VDC or 4-20 mA output signal connection: External load Plus (+) --------------------------- pin 6 of the 8-pin Mini-DIN co nn ector

External load Mi n us (-)--------------------------- pin 4 of the 8-pin Mini-DIN connector

) loads to the 0-5Vdc or 0-10 Vdc output may cause

to or faulty operation of the electronics circuitry.

NOTE:

4-20 mA analog output r equires at least 12 V dc power input.

When connecting the load to the output terminals,

) loads to the 4-20 mA output

To eliminate the possibility of noise interference, it is recommended that you use a separate cable entry for the DC power, digital communication interface, and analog output interface signal lines.

3.3

The digital interface operates via RS-232 or RS-485 (user-selected) and provides access to all applicable internal configuration parameters and data.

Digital Communication Interface Connections

Before proceeding with communication interface

, verify the meter’s

, the interface type will be briefly (for about

www.GlobalTestSupply.com

a display, the communication interface type

the multi-function button and

response (see

Section 6.5).

Communication Settings for RS-232/RS-485 communication interface

Stop bit:

....................

1 Data bits:

....................

Parity: ....................

None

Flow Control:

....................

None

The default baud rate is 9600 baud (user-selected; see Section 5, Specifications).

RS-232 Communication Interface Connection

Crossover connection must be established: HOST PC RS-232 RX Meter (RS-232 TX)

(pin 2 on the host PC DB9 connector)------pin 3 (Ring) of the 3-pin stereo jack connector (TX+)

HOST PC RS-232 TX Meter (RS-232 RX) (pin 3 on the host PC DB9 connector)------pin 2 (Tip) of the 3-pin stereo jack connector (RX-)

HOST PC RS-232 SIGNAL GND Meter (Digital GND) (pin 5 on the host PC DB9 connector)------pin 1 (Sleeve) of the 3-pin stereo jack connector

Each DFM ordered with RS-232 interface option is supplied with default crossover 6-foot long communication cable (DWYER P/N: A-CBL-A232) DB9 female to stereo 3.5 mm Plug.

If custom length cable is required, it can be assembled using the connection diagram shown in Figure 2.

www.GlobalTestSupply.com

RS-485 Communication Interface Connection

The RS-485 converter/adapter must be configured for: multidrop, 2-wire, half duplex mode (see Figure 3). The transmitter circuit must be enabled by TD or RTS (depending on which is available on the converter/adapter). Settings for the receiver circuit should follow the selection made for the transmitter circuit in order to eliminate echo.

RS-485 A line T(-) or R(-) ............. pin 2 on 3-pin Audio-connector, middle

section or "tip" DFM(RX-), (WHITE wire)

RS-485 B line T(+) or R(+) ........... pin 3 on 3-pins Audio-connector, the

"ring" section DFM (TX+), (RED wire)

RS-485 GND (if available) ............ pin 1 on 3-pin Audio-connector, the

“sleeve” section DFM (

Each DFM ordered with RS-485 interface option is supplied with a default 3foot length of communication cable (DWYER P/N: A-CBL-A485) Stereo

3.5 mm plug to stripped wires. If custom length cable is required, it can be assembled using the connection

diagram shown in Figure 3:

GND), (Shield wire)

www.GlobalTestSupply.com



DWYER

FIIGG

UURRE

DFM RRSS-

When the DFM device is set as the last device on the long RS-485 bus segment, the 120 Ω bus termination resistor must be connected between the RS-485 (+) and (-) terminals close (< 6 feet) to this device.

44885 CCOOMMMM

UUNNIICC

ATTIIOONN IINNTTEERRFFAACCE CCOONNNNEECCTTIIOONN

NOTE:

termination resistor between the RS-485 (+) and (-) pins. On instruments with a local display and joystick interface, the 120Ω termination resistor can be activated (enabled) using General Settings / Communication Port / RS-485 Termination menu selection. By default, the instrument is shipped from the factory with the RS-485 Termination mode set to Disabled.

The DFM instrument offers an integrated switchable 120Ω

www.GlobalTestSupply.com

The DFM series flow meters integrate precision a differential pressure sensor which accurately measures pr essure drop across the special restriction flow element (RFE). The geometry of the RFE is designed to ensure laminar flow in each branch within the entire range of operation of the DFM instrument. According to principles of fluid dynamics, the volumetric flow rates of a gas in the laminar flow conduits are proportional to differential pressure across the restriction flow element. In addition, precision absolute pressure and temperature sensor readings are used to calculate mass flow rate using ideal gas laws.

The DFM flow meter supports multi-gas functionality which allows users on site to select the desired measured gas using local Display/Joystick interface or digital communication interface. See Tables X - XVIII which provide lists of supported gases.

The DFM flow meter can display flow rate in 43 different mass flow or 15 different volumetric flow engineering units. Flow meter parameters and functions can be programmed locally via optional OLED/Joystick interface or remotely via the RS-232/RS-485 interface or optional Modbus RTU interface. DFM flow meters support various functions inc lu ding two programmable flow totalizers; low, high or range flow; temperature and pressure alarms; automatic zero adjustment (activated via local or digital communication interface); programmable solid state relay (SSR); programmable 0-5 Vdc, 0-10 Vdc or 4-20 mA analog outputs; userprogrammable pulse output (via SSR); and self-diagnostic alarms. Optional local OLED readout with adjustable brightness level provides mass and volumetric flow rate, total volume reading in currently selected engineering units, and diagnostic events and indication.

RRIINNCCIIPPLLE OOFF OOPPEERRATTIIOONN

FLOW MEDIUM:

clean gases,

ALIBRATIONS:

unless otherwise requested or stated.

ENVIRONMENTAL (PER IEC 664):

FLOW ACCURACY (INCLUDING LINEARITY):

temperature and pressure.

REPEATABILITY:

FLOW TEMPERATURE COEFFICIENT:

FLOW PRESSURE COEFFICIENT:

FLOW RESPONSE TIME:

SSPPEECCIIFFIICCA

Please note that DFM Mass Flow Meters are designed to work only with

never

TTIIOON N

any corrosive gas and

Performed at standard conditions (14.7 psia [101.4 kPa] and 70 °F [21.1 °C])

+0.15% of full scale.

default 10 ms (user-adjusted).

www.GlobalTestSupply.com

never

any liquid.

Installation Level II; Pollution Degree II.

±(0.5% RD + 0.2% FS) at calibration

0.05% of full scale/ °C or less.

0.01% of full scale/psi (6.895 kPa) or less.

INSTRUMENT W AR M-UP TIME:

< 5 seconds.

MAXIMUM ME ASURABLE FLOW RANGE:

OPERATION RANGE/TURNDOWN RATIO:

133% Full Scale.

0.5% to 100% Full Scale / 200:1.

MASS REFERENCE CONDITIONS (STP): 70°F & 14.696 PSIA (other references available on request).

MAXIMUM INTERNAL GAS PRESSURE (STATIC):

1 20 PSIG.

MAXIMUM INSTANTANEOUS DIFFERENTIAL PRESSURE ACRO S S INLET AND OUTLET:

12 PSID.

PROOF PRESSURE:

OPERATING TEMPERATURE:

MOUNTING ATTITUDE SENSITIVITY:

R ELATIVE GAS HUMIDITY RANGE:

INGRESS PROTECTION:

OUUTT

PPUUT SSIIGGNNAALLSS::

145 P SIG.

Linear 0-5 Vdc (3000

-10 to +60 ˚C (14 to 140 ˚F).

None.

0 to 100% (Non-Condensing).

IP40 .

min. load impedance);

Linear 0-10 Vdc (5000 Ω min. load impedance);

Linear 4-20 mA (550

maximum loop resistance).

Maximum noise 10mV pe ak to p ea k (f or 0-5/0-10 Vdc output).

TRANSDUCER INPUT POWER:

Power consumption: 100 mA maximum.

9 to 26 Vdc, 150 mV maximum peak to peak output noise.

Circuit boards have built-in polarity reversal protection, and a 300mA resettable fuse provides power input protection.

DIGITAL OUTPUT SIGNALS: Standard RS-232 or RS-485 (user-selected). Optional Modbus over isolated RS-485 transceiver.

WETTED MATERIALS:

Stainless steel, FKM

O-rings, high temperature polyamide,

alumina ceramic, epoxy, silicone, glass, gold.

CAUTION:

Dwyer makes no expressed or implied guarantees of corrosion resistance of mass flow meters as pertains to different flow media reacting with any components of the meters. It is solely the customer’s responsibility to select the model best suited for a particular gas, based on the fluid contacting (wetted) materials offered in the different models.

www.GlobalTestSupply.com

INNLLEETT AANND OOUUTTLLEETT NPT female thread, DFM-07 1/4" NPT female thread for user-supplied fittings.

CCOO

NNNNEECCTTIIOONNS S::

DFM-02

10-32 female thread,

DFM-03/05

DISPLAY: Optional 128 x 64 pixels graphic yellow OLED with Esc button and Joystick interface. Simultaneously displays: Mass Flow, Totalizer Volume, Pressure and Temperature or Mass Flow, Volumetric Flow, Pressure and Temperature (user-selectable screens).

5..11

CCEE

Commpp

lliiaannccee

1/8"

MODEL

NO.

DFM-01-DFM-20

DFM-21-DFM-50

DFM-51-DFM-53

DFM-54-DFM-56

5..22

DFM Accessories

MODEL NO.

DFM-01-DFM-20

DFM-21-DFM-50

DFM-51-DFM-53

DFM-54-DFM-56

GFM-110P

GFM-110P24

GFM-220PE

GFM-220P24

GFM-240PUK

TABLE II: DFM FLOW RANGES

FULL SCALE

MASS FLOW RATE

PRESSURE DROP

FULL SCALE

FLOW (PSID)

0.5 to 50 sml/min 1.0

51 sml/min to 20 sl/min 1.0 1/8" NPT female

21 sl/min to 50 sl/min 2.0 1/8" NPT female

51 sl/min to 100 sl/min 2.5 1/4" NPT

TABLE III: DFM ACCESSORIES

FITTING CODE

FITTINGS

F0C2 F2C2 F2C4 F4C4 F4C6

POWER SUPPLIES

10-32 thread, Face Seal, 316 ss 1/8 NPT thread, 1/8 tubing, 3 16 ss 1/8 NPT thread, 1/4 tubing, 3 16 ss 1/4 NPT thread, 1/4 tubing, 3 16 ss 1/4 NPT thread, 3/8 tubing, 3 16 ss

Power Supply, 110 V / 12 Vdc /North America Power Supply, 110 V / 24 Vdc /North America Power Supply, 220 V / 12 Vdc /Europe Power Supply, 220 V / 24Vdc /Europe Power Supply 240 V / 12 Vdc /United Kingdom

10-32 female thread

DESCRIPTION

PROCESS

CONNECTION

female

www.GlobalTestSupply.com

CABLES

CBL-A232

CBL-8MINIDIN-3

Shielded cable 8-pin Min-DIN with stripped ends 3 feet long

CBL-8MINIDIN-12

Shielded cable 8-pin Min-DIN with stripped ends 12 feet long

COMMUNICATION PORT ACCES SORIES

USB-RS-232

MODBUS INTERFACE ACCESSO RIES

ECS803-1

RJ45 shielded Y -adapter (Passive TAP).

TDG1026-8C

RJ45 Modular Coupler.

MOD27T

RJ45 Line Terminator (100 Ω 0.25 W).

JMOD4S-1

Category 5E Patch Twisted Pair Cable, RJ45 / RJ45, Blue 2.0 feet.

TRD815BL-10

TRD815BL-25

Category 5E Patch Twisted Pair Cable, RJ45 / RJ45, Blue 25.0 feet

AAXXIIMMUUMM PPRREESSSSUURREE

DDRROOPP

[

mmmm H2O]

[

ppssiidd] [kkPPaa]]

up to 10

703

1.0

6.894

703

1.0

6.894

1406

2.0

13.789

1406

2.0

13.789

1406

2.0

13.789

1757

2.5

17.236

1757

2.5

17.236

CBL-A485

Communication Cable for DFM with RS-232 Interface 6 FT

3.5mm

stereo audio connector with 3-wire to 9-pin female

D-connector Communication Cable for DFM with RS-485 Interface 6 FT

3.5mm

(included with each DFM).

stereo audio connector with 3-wire to stripped ends.

USB-RS-485

TRD815BL-2

TRD815BL-10

MOODDEELL

DFM-01-DFM-48

DFM-49-DFM-56

USB to RS-232 converter USB to RS-485 converter

RJ45 Splitter fully shiel ded (5xRJ45, 1 input 4 outputs).

Category 5E Patch Twisted Pair Cable, RJ45 / RJ45, Blue 10.0 feet. Category 5E Patch Twisted Pair Cable, RJ45 / RJ45, Blue 25.0 feet. Category 5E Patch Twisted Pair Cable, RJ45 / RJ45, Blue 10.0 feet.

TABLE IV: PRESSURE DROPS

FLLOOW

RRAATTEE

[ssttd

lliitteerrss//mmiinn]

20 30 40 50 60

100

www.GlobalTestSupply.com

TABLE V: APPROXIMATE WEIGHTS

MOODDEELL DFM-01-DFM-20 flow meter DFM-21-DFM-56 flow meter

0.85 lbs. (0.4 kg)

1.15 lbs (0.52 kg)

WEEIIGGHHT

SHHIIPPPPIINNG WWEEIIGGHHTT

2.55 lbs. (1.2 kg)

3.0 lbs (1.36 kg)

6..11

Now that the Mass Flow Meter has been correctly installed and thoroughly tested as described in first turned on, device firmware and on the first line, communication interface type and hexadecimal address value on the second line, Communication Port baud rate on the third line, and Modbus hardware status and decimal address value on the fourth line (see for another

OOPPEERRA

PPrreepp

Section 2

2 seconds. Subsequently, the actual process information (PI) is displayed.

Figure 4: DFM FFiirr

TTII

N NGG IINNSSTTRRUUCC

aarraattiioon aannd PPoo

, make sure the flow source is OFF. Initially, after the power

FFww: AA CCOOMM::RRSS BBaauudd RRaattee: MM

ooddBBuuss: Y AA

mmwwaarree aannd CC

TTIIOON N

wweer UUpp

EEPROM database revisions will be displayed

Figure 4

000011 TTbbll:: AA000011

22332

mmmm

AAdddd:: 1111

dddd:: 1111

uunniiccaattiioon

99660000

IInntteerffaaccee

IInnff

oormation SSccrr

). These are shown

eee e

www.GlobalTestSupply.com

22.67

PSIA

27.7 C

T1: 14726.0 Sml

Sml min

Absolute Pressing

Reading

Current Mass Flow

Totalizer #1 Reading

Temperature

Current Unit of

Totalizer#1



NOTE:

the model and dev



Reading

Rate Reading

Figure 5: DFM Initial Process Information

Actual content of the OLED screen may vary depending on

ice configuration.

The main DFM flow meter screen shows current instrument Pressure, Temperature, Mass Flow, and Totalizer Volume readings in previously select ed units of measure.

NOTE:

the status LED will emit a constant GREEN light (normal operation, ready to measure).

5 seconds after the initial powering of the DFM flow meter,

0.00

Measure for Mass Flow

Units of Measure

6..22 SSwwaa

If a flow of more than 133% the nominal maximum flow rate of the Mass Flow Meter is taking place (displayed mass flow reading is flashing), a condition known as "swamping" may occur. Readings of a "swamped" meter cannot be assumed to be either accurate or linear. Flow must be restored to below 133% of maximum meter range. Once flow rates are lowered to within calibrated range, the swamping condition will end.

mmppiinngg

CCoonnddiittiioon

www.GlobalTestSupply.com

6..33

Press here for Enter command

RIGHT

LEFT

MMeetteer PPrroocceesss IInnffoorrmm

Based on meter configuration, different parameters may be displayed in the Process Information (PI) screen by moving the control joystick (see Figure

6) Up or Down (DN). Process Information screens can be configured to be static or dynamic (see Section 6.4.13.2 “Display and Process Information (PI) Screens”). Using PI Screen Mask settings, the user can enable (unmask) or disable (mask) up to 6 different process information combinations.

FIGURE 6: JOYSTICK

In the Static Mode, moving the joystick Up pages through the PI screens in the forward direction, while moving the joystick DN pages through the PI screens in the reverse direction. When the last PI screen is reached, the firmware “wraps around” and scrolls to the initial PI screen once again.

aattiioon ((PPII)) ss

DOW N

ccrr

eeenns

In the Dynamic Display Mode, the firmware initiates automatic screen sequencing with user-adjusted screen Cycle Time (see Section 6.4.13.2 “Display and Process Inform ation (PI) Screens”). When the last PI screen is reached, the firmware “wraps around” and scrolls to the initial PI screen once again.

www.GlobalTestSupply.com

0..000

222..7777

PSIA

0..000

PI Screen #1 (Pressu re, T emperature,

11::

144772266..00

Sml

22::

0..00

Sml

222..7777

PSIA

255..7

Smmll miinn

255..5

miinn 222..7777

PSIA

0..000

244..5

miinn V::

0..00

mll//mmiin

Mass Flow Rate, Tot alizer #1)

PI Screen #2 (Pressu re, T emperature, Mass Flow Rate, Tot alizer #2)

Smml

PI Screen #3 (Pressu re, T emperature, Mass Flow Rate, Volumetric Flow Rate)

Smmll

PI Screen #4 (Select ed G as, Instrument Full Scale Range, Int erf ac e I nf ormation)

Com. Interface type and device address

Analog Interface Ty pe

Flow, Pressure,

Temperature

Alarms Status

Totalizers Status

Alarm Events Status

DP Sensor Raw Counts AP Sensor Raw Cou nt s

DP Sensor reading mBar

Temperature Sensor

Raw Counts

AAIIR FFSS: 00..22000000 LL//mmiin RRSS

22332

FIGURE 7: DFM PROCESS INFORMATION SCREENS

00--55VVddcc

MMooddbbuuss::

PPOOWWEERR:: AAllmm::DDDDD TT

11::DD TT22::EE PPOO::DD

::00000000

DD:: AA::--

DDPP:

226688335

1199..66 HHrr

RReell::

DDEE

::0000000

116644335533 99001 44110066337

00..00005

2244..8833CC

88998

00..00000011

Currently Selected Gas Name

Instrument Full Scale Range

Modbus interface H/W status (Y, N)

PI Screen #5 (Events Notification screen)

Time elapsed from the power up event Relay assig nment

Pulse Output Status Diagnostic Events St atus Re gister

PI Screen #6 (Instrument Diagnostic)

DP Sensor Temperature Raw Counts AP Sensor Temperature Raw Counts DP sensor rea ding in PSID Temperature Sensor Reading (deg. C)

www.GlobalTestSupply.com

6..44 LLooccaal UUsseerr IInntteerrffaacce

The diagram in Figure 12 (page 26) gives a general overview of the standard top-level display menu structure (when running firmware version A001). The Esc push-button is used to toggle between the Process Mode (PI screens) and the Setup menus, and to return to upper menu level.

In order to move through the menu items, the user must move the joystick UP and DN. When the last item in the menu is reached, the menu “wraps around” and scrolls back to the beginning of the menu items list. Similarly, when the first menu item is highlighted and the joystick is moved UP, the menu “wraps around” and scrolls down to the end of the menu item’s list. In order to select the desired menu item, the user must press the joystick down (this action is equivalent to the Enter button). To go back to upper menu level, the user must press the Esc button.

All process configuration parameter settings are password-protected. In order to access or change them, Program Protection (PP) s h ould be disabled. Each time the device is powered up, the Program Protection is enabled automatically. By default, the device is shipped from t he fa ctor y with the Program Protection (PP) password set to Zero (PP Disabled). If the PP password is set to Zero (Disabled), entering a PP password is not required. A subsequent screen will appear and the Program Protection menu item will be selected:

Fiigguurre 8: Program Protection Screen

MMee

nnuu SS

PRR

OOGG

RRAAMM

PPRROOTTEECCTTIIOONN:

ENNAABBLLEE

DIISSAABBLLEED

uussh UU

pp,,DDn

ttoo

settttiinngg,, EEnnt ttoo SSaavvee

seettttiinngg, EE

ssc

ttrruuccttuurre

cchhaanngg

ttoo EExxiitt

Moving the joystick DN to select the Disabled option and then pushing the joystick (ENT) to save settings wil l disable program protection.

If the PP password is set to any value more than Zero, the firmware will prompt with “Enter Program Protection Password” (see Figure 9).

Enntteerr PPrr

ooggrraam PPrrootteeccttii

Paasssswwoorrdd::

uussh UU

pp,,DDn

ttoo

seettttiinngg, EEnnt ttoo SSaavvee

seettttiinngg, EE

Figure 9: Program Protection Password Screen

The user must enter up to 3 digits for the program protection code, in order to be able to access password protected menus.

ssc

cchhaanngg

ttoo EExxiitt

oonn

www.GlobalTestSupply.com



NOTE:

acceptability. If data is not acceptable, it is reject ed and a messa ge

is generated to indicate that the new data has not been accepted.



NOTE:

Program Protection (PP) password set to Zero (PP Disabled).

By default, the device is shipped from the factory with the

Once the correct password is entered, the Program Protection is turned off until the unit is powered up again.

6..44..11

PPaarraammeetteer EEnn

There are two methods of data entry:

• Direct numerical entry.

• Tabular Input from a menu.

If the menu with direct numerical entry is selected, move the joystick UP or DN to increase or decrease digit value between 0-9. Move the joystick RIGHT or LEFT to move the cursor to another digit position. When the desired value is entered, use joystick equivalent of an ENT butto n to accept (to be saved in the EEPROM) the new value

During data entry, the input values are checked for

If the menu with tabular entry is selected, the available menu options can be set using the joystick UP and DN positions and are accepted by pressing the joystick equivalent of an ENT button.

ttrry

6..44..22 SSuu

In order to get access to “Change Program Protection (PP) Password” menu, Program Protection must be disabled. If PP password is set to Zero (Disabled), entering PP Password is not required and PP can be disabled from “Program Protection” menu (see Figure 8). If PP Password is set to any value more than Zero, the firmware will prompt with “Enter Program Protection Password” (see Figure 9). The user must enter a program protection code (up to 3 digits). If the PP password is lost or forgotten, contact the factory or your distributor.

Once the “Change PP Password” menu is selected, the foll owing screen will appear:

bbmmeennu ““CChhaanngge PPPP PPaasssswwoorrdd”

OOlld PPPP PPaasssswwoorrdd: NNeew PPPP PPaasssswwoorrdd: EEnntteer OOlld

Figure 10: Change PP Passwor d Scree n

PPPP PPaasssswwoorrdd

www.GlobalTestSupply.com

In order to protect device configuration parameters when changing the PP password, the old PP password must first be entered.

Once old and new passwords are entered, the firmware will prompt with a confirmation

message (see

Figure 11

Neeww PPPP PPaasssswwoorrdd

) that the new password has been saved:

aass bbeeeenn ssaavveed

PP PPaasssswwoorrdd iiss CChhaannggeed

Figure 11: PP Password Change Confirmation Screen

..44..33

SSuu

This submenu contains information about the device’s main configuration parameters. These items are informational only, not password-protected, and cannot be changed (read only).

6..44..44

Us Mass Flow, Volumetric Flow, Pressure, and Temperature readings. This option allows configuration of the flow meter with the desired units of measurement. These are global settings and determine what appears on all Process Information screens and in all data log records. Units should be selected to meet your particular metering needs. A total of 44 different mass-based engineering units (Standard, Normal and True Mass) are supported (see Table VI). A total of 15 different volumetric flow rate units are supported (see Table VII).

Supported Pressure units of measure are listed in Table VIII, and Supported Temperature units of measure are listed in Table IX.

bbmmeennu ““DDeevviicce IInnffoorrmm

SSuu

bbmmeennu ““

e the “Units of Measure" Menu to navigate to Measuring Units settings for

UUnniittss

ooff MMeeaassuurree””

aattiioonn””

www.GlobalTestSupply.com

TABLE VI: LIST OF SUPPORTED MASS FLOW UNITS OF MEASURE

Units

STANDARD

1 %FS %s

Percent of Full Scale

2 SuL/min

SuL

Microliters per minute

3 SmL/sec

SmL

Milliliter per second

4 SmL/min

SmL

Milliliters per minute

5 SmL/hr

SmL

Milliliter per hour

6 SL/sec SL

Liter per sec ond

7 SL/min SL

Liter per minute

8 SL/hr SL

Liter per hour

9 SL/day SL

Liter per day

Sm3/min

Sm3

Cubic meter pe r m in ute

Sm3/hr

Sm3

Cubic meter pe r ho ur

Sm3/day

Sm3

Cubic meter pe r da y

Sf3/sec

Sf3

Cubic feet per second

Sf3/min

Sf3

Cubic feet p er m inute

Sf3/hr

Sf3

Cubic feet per hour

Sf3/day

Sf3

Cubic feet per day

TRUE MASS

gr/sec

Grams per second

gr/min

Grams per minute

gr/hr

Grams per hour

gr/day

Grams per day

kg/min

Kilograms per minut e

kg/hr

Kilograms per hour

kg/day

Kilograms per day

lb/min

Pounds per minute

lb/hr

Pounds per hour

lb/day

Pounds per day

oz/sec oz

Ounce per second

oz/min oz

Ounce per minute

NORMAL

NuL/min

NuL

Microliters per minute

NmL/sec

NmL

Milliliter per second

NmL/min

NmL

Milliliters per minute

NmL/hr

NmL

Milliliter per hour

NL/sec NL

Liter per sec ond

NL/min

Liter per minute

NL/hr

Liter per hour

NL/day

Liter per day

Nm3/min

Nm3

Cubic meter pe r m in ute

Nm3/hr

Nm3

Cubic meter pe r ho ur

Nm3/day

Nm3

Cubic meter pe r da y

Nf3/sec

Nf3

Cubic feet per second

Nf3/min

Nf3

Cubic feet p er m inute

Nf3/hr

Nf3

Cubic feet per hour

Nf3/day

Nf3

Cubic feet per day

USER DEFINED

Number Mass Flow Rate

Totalizer Volume Units

Description

USER U

User Defined

www.GlobalTestSupply.com

TABLE VII: LIST OF SUPPORTED VOLUMETRIC FLOW UNITS OF MEASURE

1 %FS %s

Percent of Full Scale

2 uL/min

Microliters per minute

3 mL/sec

Milliliter per second

4 mL/min

Milliliters per minute

5 mL/hr

Milliliter per hour

6 L/sec L

Liter per sec ond

7 L/min L

Liter per minute

8 L/hr L

Liter per hour

9 L/day L

Liter per day

m3/min

Cubic meter pe r m in ute

m3/hr

Cubic meter pe r ho ur

m3/day

Cubic meter pe r da y

f3/sec

Cubic feet per second

f3/min

Cubic feet p er m inute

f3/hr

Cubic feet per hour

f3/day

Cubic feet per day

1 PSIA

psiA

Pound per square inch

2 barA

barA

bar

3 mbarA

mbar

Millibar

4 hPaA

hPaA Hecto Pascal

5 kPaA

kPaA Kilo Pascal

6 MPaA

MPaA Mega Pascal

7 atm

atm

Atmosphere

8 g/cm2A

gcm2

Gram-force per square cen timeter

9 kg/cmA

kgc2

Kilogram-force per square ce ntimeter

inHgA

inHg

Inch of mercury [0˚C]

mmHgA

mmHg

Millimeter of mercury [0˚C]

cmH2OA

cmH2

Centimeter of water [4˚C]

inH2OA

inH2

Inch of water [4˚C]

TorrA

torr

Torr

%FS

%FS Percent of Full Scale

˚F

degree Fahrenheit

˚C

degree Celsius

3 K

Kelvin

˚R

degree Rankine

Number Flow Ra te Units

Totalizer Volume Units

Description

TABLE VIII: LIST OF SUPPORTED ABSOLUTE PRESSURE UNITS OF MEASURE

Number Pressure Units Name Short Name

TABLE IX: LIST OF SUPPORTED TEMPERATURE UNITS OF MEASURE

Number Temperature Units Label

Description

www.GlobalTestSupply.com



NOTE:

Program the Measuring Units first because subsequent menus may be based on the units selec changed, the Totalizer’s Unit of Measure will be automatically updated.

ted. Once Flow Unit of Measure is

6..44..55

““SSuu

bbmmeennuu UUsseerr--DDee

In addition to conventional flow units, user-defined flow engineering units may be selected. Use the “Engineering Units and K-Factor” menu to navigate to the “User-Defined Units” menu option. This option enables userdefined configuration of any engineering unit required for process measurement.

The following three parameters are available for this function:

• UD Unit volume K-Factor (defined in Liters)

• UD Unit time base (defined in Seconds)

• UD Unit use density (units with or without density support)

Before using the User-Defined Unit, be sure the proper conversion factor of the new unit, with respect to one liter, is set. The default entry is 1.00 Liter. Also, proper time-based values for User-Defined Units must be set.

Figure 12 explains by diagram the various upper level display menus.

fifinneed

UUnniittss”

www.GlobalTestSupply.com

Program Protaction (PP)

Change PP Password

Device Information

Units of Measure

Alarm Settings

Totalizers Settings

General Settings

Select Gas

***** Main Menu *****

Alarm Event Menu

Diagnostic Events

Sensors ADC Reading

Temperature Sensors

AnalogOut & POQueue

Miscellaneous Param

Sensor Zero Calibr.

Totalizer #1

Totalizer #2

Pulse Output

Gas Flow Alarm

Gas Pressure Alarm

Gas Temperature Alarm

Mass Flow

Volumetric Flow

Pressure

Temperature

User Defined Unit

Device ID & FS Flow

Analog/Com Interface

Firmware/EE Version

Flow Alarm Settings

Pressure Alarm Set.

Temp Alarm Settings

Totalizer#1 Settings

Totalizer#2 Settings

Pulse Outputs & LEDs

General Settings

Standard Temperature

Standard Pressure

Normal Temperature

Normal Pressure

Display Oper. Mode

Screen Cycle Time

PI Screens Config.

OLED Brightness

Screen Saver Mode

OLED SS Time Out

OLED SS Brightness

Flow Rate Precision

Baud Rate Settings

Dev. ModBus Address

ModBus Com. Parity

ModBus Com. StopBit

Disabled

Low F. Alarm

High F. Alarm

F. Range H - L

Low P. Alarm

High P. Alarm

P. Range H - L

Low T. Alarm

High T. Alarm

T. Range H - L

Totalizer #1 Event

Totalizer #2 Event

Pulse Output

Alarm Events

Diagnostic Events

Manual On

Totalizer #1 Mode

Tot#1 Flow Start

Tot#1 Action Vol.

Tot#1 PowerOn Delay

Tot#1 Auto Reset

Tot#1 AutoRes Delay

Reset Totalizer #1

Tot#1 DP Precision

Totalizer #2 Mode

Tot#2 Flow Start

Tot#2 Action Vol.

Tot#2 PowerOn Delay

Tot#2 Auto Reset

Tot#2 AutoRels Delay

Reset Totalizer #2

Tot#2 DP Precision

PulseOutput Mode

Pulse Flow Start

[Unit]/Pulse

Pulse Active Time

STP/NTP Units Cond

Display & PI Screens

Communication Port

ModBus Interface

Relay Assignment

Analog Output

Status LED Settings

Signal Conditioner

UD Unit K-Factor

UD Unit Time Base

UD Unit Use Density

Pressure Alarm Mode

Low Pressure Alarm

High Pressure Alarm

Pressure Alarm Delay

Pressure Alarm Latch

PA Power Up Delay

Flow Damping

Flow NLEF Mode

Pressure Damping

Pressure NLEF Mode

LCD Flow Average

Gas Temp. Damping

LCD Flow Dead Band

Recent Gases

Standard Gases

Bioreactor Gases

Breathing Gases

Chromatography Gases

Fuel Gases

Laser Gases

O2 Concentrator

Stack Gases

Welding Gases

Use Defined Mixture

Alarm & Diagnostic

Alarm Events Status

Alarm Events Mask Reg.

Alarm Events Latch Reg.

Reset Alarm Events Reg.

Diag. Events Status

Diag. Events Mask Reg.

Diag. Events Latch Reg.

Reset Diag. Events Reg.

Start Auto Zero Now

Start AP Auto Tare

ViewZeroParameters

Default Events

F. Alarm & Tot Events

Alarm Events

Diagnostic Events

Main Com. Interface

Modbus Interface

Analog Output Mode

Analog Output Cal.

Analog Output Test

0-5 Vdc

0-10 Vdc

4-20 mA

Temp. Alarm Mode

Low Temp. Alarm

High Temp. Alarm

Temp. Alarm Delay

TA Power Up Delay

Temp. Alarm Latch

Flow Alarm Mode

Low Flow Alarm

High Flow Alarm

Flow Alarm Delay

Flow Alarm Latch

FA Power Up Delay

UART Tranceiv Mode

Baud Rate Settings

RS-485 Bus Address

RS-485 Termination

See Table VIII

See Table VI

See Table IX

See Table VII

Figure 12 DFM Upper Levels Menu Structure

www.GlobalTestSupply.com

6..44..66

Recent Gases

SSuu

bbmmeennu ""SSeellee

cct GGaass""

The currently active gas can be selected by the user via OLE D/ jo ys ti ck or digit al c omm un ic at io n interface. The gas data are allocated in different gas group s (see

Figure 13

below). The “Recent Gases” group keeps up to 16 recently selected gases. The detailed list of the gases for each group is provided in Tables X through XVIII, be gi nn in g on t he fo ll ow in g pa ge .

For example, to select Nitrogen, the user should nav ig at e to “Select Gas”  “Standard Gases”, then highlight “Nitrogen” and press the joystick equiva le nt of an

Standard Gases Bioreactor Gases Breathing Gases Chromatograpy Gases Fuel Gases Laser Gases O2 Concentrator Stack Gases Welding Gases User Defined Mixture

Ent

button.

Figure 13: Selecting Gas Group

www.GlobalTestSupply.com

TABLE X: Standard Pure Non-Corrosive Gases

Gaa

(µµPPaa--ss))

0 Air

Air

18.259686

1.2000185

0.99963453

1 Ar

Argon

22.377244

1.6555318

0.99932392

2 CO2 Carbon Dioxide

14.743078

1.8322844

0.99473012

3 N2 Nitrogen

17.624584

1.1604245

0.99976728

4 O2 Oxygen

20.3345

1.3261455

0.99930979

5 He Helium

19.668342

0.16568373

1.0004913

6 CO Carbon Monoxide

17.475804

1.1604842

0.99959984

7 C2H4 Ethylene

10.187017

1.168818

0.99401503

8 C2H6 Ethane

9.2398038

1.255226

0.99208387

9 n-C4H10 n-Butane

7.3072193

2.4852646

0.96854578

i-C4H10 i-Butane

7.4018705

2.4755419

0.97234976

C3H8 Propane

8.0415054

1.857567

0.98310908

12 D2

Deuterium

12.473107

0.16672796

1.0005847

13 H2

Hydrogen

8.8198202

0.083436355

1.0005991

N2O Nitrous Oxide

14.654788

1.8332083

0.99430109

CH4 Methane

10.949931

0.66562262

0.99816159

16 Ne

Neon

30.847242

0.83530908

1.0004838

Krypton

24.839148

3.4779701

0.9978346

SF6 Sulfur Hexafluoride

15.042726

6.121213

0.98816832

19 Xe

Xenon

22.710043

5.4674713

0.99450233

C2H2 Acetylene

10.334757

3.4606011

0.99244221

C25

25% CO2 / 75% Ar

20.455223

1.6988495

0.99859725

C10

10% CO2 / 90% Ar

21.609367

1.672811

0.99905731

23 C8

8% CO2 / 92% Ar

21.762981

1.6693503

0.9991131

24 C2

2% CO2 / 98% Ar

22.223694

1.6589828

0.99927304

C75

75% CO2 / 25% Ar

16.611552

1.7870162

0.99639528

He75

75% He / 25% Ar

23.052769

0.53762966

1.0005554

He25

25% He / 75% Ar

23.043143

1.2822075

1.0000347

Ar / 2.5% CO2

30 P5

95% Ar / 5% CH4

22.146573

1.6060633

0.99928305

Nuummbbeer

lll DDaattaa ffoor SStaannddaarrdd CCoonnddiittiioonnss

hhoorrtt

Naamme

Loonng NNaammee

((

770

°°FF aannd 1144..669966 PPSSIIAA)

bbssoolluutte

Viissccoossiitt

Deennssiitt

g/l

Coommpprreessssiibb

iilliittyy

28 A1025

29 Star29

90% He / 7.5%

Stargon CS 9 0%

Ar/8%CO2/2%O2

21.314678

21.730903

www.GlobalTestSupply.com

0.31866435

1.6627585

1.0005383

0.99911456

Gaa

(µµPPaa--ss))

Bio-5M

5%CH4 / 95%CO2

14.653659

1.7701352

0.99498978

Bio-10M

10%CH4 / 90%CO2

14.559299

1.7147013

0.99523243

Bio-15M

15%CH4 / 85%CO2

14.459421

1.6564349

0.99544756

Bio-20M

20%CH4 / 80%CO2

14.353426

1.5978991

0.99567147

Bio-25M

25%CH4 / 75%CO2

14.24079

1.5394019

0.99588751

Bio-30M

30%CH4 / 70%CO2

14.120874

1.4809418

0.9960956

Bio-35M

35%CH4 / 65%CO2

13.992953

1.4225176

0.99629569

Bio-40M

40%CH4 / 60%CO2

13.856199

1.3641278

0.99648773

Bio-45M

45%CH4 / 55%CO2

13.709659

1.3057712

0.99667173

Bio-50M

50%CH4 / 50%CO2

13.55223

1.2474461

0.99684765

Bio-55M

55%CH4 / 45%CO2

13.382616

1.1891512

0.99701551

Bio-60M

60%CH4 / 40%CO2

13.1993

1.1308852

0.99717531

Bio-65M

65%CH4 / 35%CO2

13.000513

1.0726464

0.99732702

Bio-70M

70%CH4 / 30%CO2

12.784241

1.0144337

0.99747066

Bio-75M

75%CH4 / 25%CO2

12.548154

0.95624539

0.9976062

Bio-80M

80%CH4 / 20%CO2

12.289467

0.89808023

0.99773363

Bio-85M

85%CH4 / 15%CO2

12.004793

0.83993679

0.99785292

Bio-90M

90%CH4 / 10%CO2

11.690063

0.78181364

0.99796403

Bio-95M

95%CH4 / 5%CO2

11.340435

0.72370939

0.99806694

Nuummbbeer

lll DDaattaa ffoor SSttaannddaarrdd CCoonnddiittiioonnss

hhoorrtt

Naamme

Loonng NNaammee

TABLE XI: Bioreactor Gases

((

770

°°FF aannd 1144..669966 PPSSIIAA)

bbssoolluutte

Viissccoossiitt

Deennssiitt

g/l

Coommpprreessssiibb

iilliittyy

www.GlobalTestSupply.com

TABLE XII: Breathing Gases

Gaa

(µµPPaa--ss))

56 EAN-32 32%O2 / 68%N2

18.553594

1.2134468

0.99961365

57 EAN-36 36%O2 / 64%N2

18.665372

1.2200749

0.99959516

58 EAN-40 40%O2 / 60%N2

18.77622

1.2267031

0.9995768

59 HeOx-20 20%O2 / 80%He

21.160783

0.39742666

1.000575

60 HeOx-21 21%O2 / 79%He

21.164401

0.40901481

1.0005744

61 HeOx-30 30%O2 / 70%He

21.120337

0.51331687

1.0005531

62 HeOx-40 40%O2 / 60%He

20.99441

0.62923199

1.0005002

63 HeOx-50 50%O2 / 50%He

20.851246

0.7451824

1.0004169

64 HeOx-60 60%O2 / 40%He

20.714981

0.86118182

1.0002995

65 HeOx-80 80%O2 / 20%He

20.499515

1.0934087

0.99993193

66 HeOx-99 99%O2 / 1%He

20.338992

1.3144914

0.99934879

67 EA-40 Enri Air-40%O2

19.15564

1.2505528

0.99951725

68 EA-60 Enri Air-60%O2

19.56039

1.2757473

0.9994476

69 EA-80 Enri Air-80%O2

19.953017

1.3009447

0.99937862

5%CO2 / 0.96%Ar)

TABLE XIII: Chromatography Gases

PSSIIAA)

(µµPPaa--ss))

P-5

5%CH4 / 95%Ar

22.146573

1.6060633

0.99928305

P-10

10%CH4 / 90% Ar

21.899835

1.5565932

0.99924058

Nuummbbeer

lll DDaattaa ffoor SStaannddaarrdd CCoonnddiittiioonnss

hhoorrtt

Naamme

Loonng

((

770

°°FF aannd 1144..669966 PPSSIIAA)

bbssoolluutte

Viissccoossiitt

Deennssiitt

g / l

Compressibility

Metabol

Gaa

Nuummbbeer

hhoorrtt

Naamme

Metabolic Exhalant

(16%O2 / 78.04%N2 /

lll DDaattaa ffoor SStaannddaarrdd CCoonnddiittiioonnss

Loonng Nammee

18.04915

((

770

°°FF aannd 1144..669966

bbssoolluutte

Viissccoossiitt

1.2250145 0.99952679

Deennssiitt

g / l

Compressibility

www.GlobalTestSupply.com

TABLE XIV: Fuel Gases

Gaa

(µµPPaa--ss))

40%H2 / 29%CO /

64%H2 / 28%CO /

70%H2 / 4%CO /

83%H2 / 14%CO /

93%CH4 / 3%C 2H6 / 95%CH4 / 3%C 2H6 /

95.2CH4 / 2.5%C2H6 /

50%H2 / 35%CH4 /

75%H2 / 25%N2

66.67%H2 / 33.33%O2

LPG 96.2%C3H8 /

LPG 85%C3H8 /

Nuummbbeerr

lll DDaattaa ffoor SStaannddaarrdd CCoonnddiittiioonnss

hhoorrtt

Naamme

Loonng NNaammee

((

770

°°FF aannd 1144..669966 PPSSIIAA)

bbssoolluutte

Viissccoossiitt

Deennssiitt

g / l

Coommpprreessssiibb

iilliitty

74 SynG-1

75 SynG-2

76 SynG-3

77 SynG-4

78 NatG-1

79 NatG-2

80 NatG-3

81 82

Coal

Gas

Endo

HHO

HD-5

20%CO2 / 11%CH4

1%CO2 / 7%CH4

25%CO2 / 1%CH4

1%C3H8 / 2%N2 /

1.3%N2 / 0.7%CO2

10%CO / 5%C2H4

3%CH4

1%CO2

1%N2 / 1%CO2

0.2%C3H8 /

0.1%n-C4H10 /

1.5%C2H6 /

0.4%C3H6 /

1.9%n-C4H10

15.253299 0.80779626

14.781416 0.44282577

14.725047 0.5672004

13.737274 0.25149803

11.020257 0.71638178

11.006305 0.69973554

10.99793 0.69890329

12.23411 0.47642496

13.712892 0.35247105

16.838285 0.49714469

8.0566953 1.8596915

0.99952272

1.0003283

0.99990018

1.0005186

0.9979886

0.99804196

0.99804914

0.9988977

1.0005199

1.0004234

0.98305588

HD-10

10%C3H6

/ 5%n-C4H10

www.GlobalTestSupply.com

8.060707 1.8793052

0.98275016

TABLE XV: Laser Gases

lll DDaattaa ffoor SSttaannddaarrdd CCoonnddiittiioonnss

((

770

°°FF aannd 1144..669966 PPSSIIAA)

Gaa

(µµPPaa--ss))

4.5%CO2 / 13 .5 %N2 /

LG-6 6%CO2 / 14%N2 / 80%He

19.810188

0.4041824

1.0005193

LG-7 7%CO2 / 14%N2 / 79%He

19.76977

0.42074815

1.0005058

HeNe-9 9%Ne / 91%He

22.266969

0.22372402

1.0004795

9.4%CO2 / 19.25%N2 /

TABLE XVI: O2 Concentrator Gases

lll DDaattaa ffoor SStaannddaarrdd CCoonnddiittiioonnss

((

770

°°FF aannd 1144..669966 PPSSIIAA)

(µµPPaa--ss))

OCG-89 89%O2 / 7%N2 / 4%Ar

20.276364

1.3277141

0.99934333

100

OCG-93 93%O2 / 3%N2 / 4%Ar

20.373369

1.334345

0.99932581

101

OCG-95 95%O2 / 1%N2 / 4%Ar

20.421571

1.3376605

0.99931705

TABLE XVII: Stack Gases

PPSSIIAA)

(µµPPaa--ss))

2.5%O2 / 10. 8% CO2 /

2.9%O2 / 14% C O 2 /

3.7%O2 / 15% C O 2 /

7%O2 / 12%CO 2 / 80%N2

10%O2 / 9.5% C O 2 /

13%O2 / 7%CO 2 / 79%N2

Nuummbbeer

hhoorrtt

Naamme

LG-4.5

Loonng

Naamme

82%He

bbssoolluutte

Viissccoossiitt

19.875867 0.37436617

Deennssiitt

g / l

Compressibility

1.0005373

Gaa

Nuummbbeer

Gaa

Nuummbbeer

104

105

LG-9 9%CO2 / 15%N2 / 76%He 19.644085 0.46382218

LG-9.4

hhoorrtt

Naamme

hhoorrtt

Nammee

FG-1

FG-2

71.35%He

Loonng

Naamme

lll DDaattaa ffoor SStaannddaarrdd CCoonnddiittiioonnss

Loonng

Naamme

85%N2 / 1%Ar

82.1%N2 / 1%Ar

19.488366 0.51269615

bssoolluuttee

Viissccoossiitt

((

770

°°FF aannd 1144..669966

bbssoolluutte

Viissccoossiitt

17.553974 1.2415291 0.99938947

17.489167 1.2635492 0.99927301

Deennssiitt

g / l

1.0004745

1.0004588

g / l

Compressibility

106

107

108

109

FG-3

FG-4

FG-5

FG-6

80.3%N2 / 1%Ar

/ 1%Ar

79.5%N2 / 1%Ar

/ 1%Ar

www.GlobalTestSupply.com

17.484521 1.2715509 0.99923323

17.642257 1.2569936 0.99932823

17.781725 1.2452832 0.99940281

17.922258 1.2335784 0.99947428

TABLE XVIII: Welding Gases

lll DDaattaa ffoor SSttaannddaarrdd CCoonnddiittiioonnss

((

770

°°FF aannd 1144..669966 PPSSIIAA)

(µµPPaa--ss))

114

C-2

2%CO2 / 98%Ar

22.223694

1.6589828

0.99927304

115

C-8

8%CO2 / 92%Ar

21.762981

1.6693503

0.9991131

116

C-10

10%CO2 / 90%Ar

21.609367

1.672811

0.99905731

117

C-15

15%CO2 / 85%Ar

21.225138

1.6814739

0.99891226

118

C-20

20%CO2 / 80%Ar

20.840474

1.6901531

0.99875902

119

C-25

25%CO2 / 75%Ar

20.455223

1.6988495

0.99859725

120

C-50

50%CO2 / 50%Ar

18.525065

1.7426245

0.99764493

121

C-75

75%CO2 / 25%Ar

16.611552

1.7870162

0.99639528

122

He-25 25%He / 75%Ar

23.043143

1.2822075

1.0000347

123

He-50 50%He / 50%Ar

23.466653

0.90972133

1.0004058

124

He-75 75%He / 25%Ar

23.052769

0.53762966

1.0005554

125

He-90 90%He / 10%Ar

21.816616

0.31445794

1.0005487

90%He / 7.5%Ar /

8%CO2 / 2%O2

Gaa

Nuummbbeer

126

127

hhoorrtt

Naamme

A1025

Star29

Loonng Naamme

2.5%CO2

Stargon CS 9 0% A r /

bbssoolluutte

Viissccoossiitt

21.314678 0.31866435

21.730903 1.6627585 0.99911456

Deennssiitt

g / l

Compressibility

1.0005383

6.4.7 Submenu “User-Defined Mixture”

Submenu “User-Defined Mixture” allows the user to create and save up to 20 custom gas mixtures. Each gas mixture may have from 2 to 5 gases from those listed in Tables X through XVIII.

By default, the instrument has no preset mixtures in the memory, and there is room for 20 user-defined mixtures (see Figure 14). Press the joystick equivalent of an Ent button to assign a name to the new gas mixture (see

Figure 15). The flashing cursor with letter “A” will appear. Move the joystick UP and DN to change letters and numbers. Once the desired letter (or

number) is set, use the joystick RIGHT command to move the cursor to the next position. Use LEFT to toggle the letter case. Press the joystick equivalent of Ent to save the gas mixture name.

Fiigguurre 11:4

www.GlobalTestSupply.com

dddd MMiixxttuurree::

2200 FFrreeee

: AAddd MMiixxttuurre MMeennuu SSeelleeccttii

oon

Enntteerr MMiixxttuurre NNaammee:



NOTE:

and Right and Left to switch between Gas Name and Ratio entry.



NOTE:

gas. Press

MyMix1 G:0 Tot: 0.00%



x 1

_M_

_ _i _

_ _

Usseeto CChhaa

Prree

ssss EEnntt

Figure 15: Assigning a Name to the Mix ture

Once

the gas mixture name is saved, the screen shown in gas component for G1, press the joystick equivalent of an a screen with a list of gases will appear.

nnggee CCaassee

WWhheenn DD

oonnee

G1 0.00% G2 0.00% G3 0.00% G4 0.00% G5 0.00%

Save, Esc to Exit

Figure 16: Add Gas Component and Ratio

Use the joystick Up and Down to select another component,

Figure 16

Ent

w ill appear. To select the

button. As shown in

Figure 17

G:AIR

Air

Ar Argon

Carbon Dioxide N2 Nitrogen O2 Oxygen He Helium CO

Carbon Monoxide

Figure 17: Selecting Gas Component

Use the joystick Up and Down to highli ght the required

the joystick equivalent of Enter to select a gas.

www.GlobalTestSupply.com

MyMix1 G:0 Tot: 0.00%

G2 G3 G4 G5



Save, Esc to Exit

Ent

MyMix1 G:0

Tot: 0.00% G1 G2 G3 G4 G5

1 Ar



NOTE: Use the joystick Up and Down to change numerical value,

and ratio accept it.

G1 Ar G2 G3 G4 G5



Save, Esc to Exit

Figure 18: G1 Component with Selected Gas

Once the gas is selected for component G1, the screen shown in Figure 18 will appear. To select the ratio for component G1, press Right. The screen shown in the top of Figure 19 will appear. To start entering a ratio value in %, press the joystick equivalent of Enter. The G1 component will appear at the bottom of the screen, with a flashing cursor. The user can now enter the desired ratio value for this gas, as shown second screen in Figure 19:

G1 Ar 0.00%

0.00%

Ar 0.00%

Figure 19: G1 Component with Highlighted Ratio Value

Left and Right to change cursor position. Once the required

value is entered, press the joystick equivalent of Enter to

www.GlobalTestSupply.com

0.00%

10.00%

MyMix1 G:0 Tot: 10.00% G1 Ar G2 G3 G4 G5



Save, Esc to Exit

10.00%

0.00%

MyMix1 G:0 Tot: 22.00% G1 Ar G2 He G3 G4 G5



Save, Esc to Exit

10.00%

12.00%

0.00%

MyMix1 G:0 Tot: 10.00% G1 Ar 10.00% G2 He 0.00% G3 0.00% G4 0.00% G5 0.00% 1 He 12.00%

Figure 20: Mixture with 4 Components Ready to be Saved

Cont inue adding up to 5 gases, as required for your application. See example of a mixture of 4 components ready to be saved. The total mixture must be 100% to be accepted. An error message will appear if the user tries to save a mixture that does not total 100%. When it is ready, press will prompt with a

confirmation message (see

************************** NEW MIXTURE HAS BEEN SAVED **************************

Press any key...

Figure 21: Mixture Saved Confirmation Message

MyMix1 G:0 Tot:100.0% G1 Ar G2 He G3 CO2 G4 C2H4 G5



Save, Esc to Exit

Left

to save the mixture. The instrument

Figure 21):

10.00%

12.00%

46.25%

31.75%

0.00%

Figure 20

for an

As directed in the above screen, press any button on the joystick to move to the next screen. Now that the mixture has been saved, it will appear in the “User-Defined Mixture” menu selection (see Figure 22):

www.GlobalTestSupply.com

MyMix1

Add Mixture: 19 Free

Figure 22: “User-Defined Mixture” Menu Selection with new MyMix

Any saved mixture can be edited by the user. In order to edit a saved mixture, highlight it using Up and Down and then pressing Left. The confirmation message shown in Figure 23 will appear. Select “YES” then press the joystick equivalent of Enter.

Edit MyMix1 Mixture?

YES

Figure 23: ""EEddiit MMiixxttuurree"" MMee

In the edit mixture mode, the u ser can cha nge the mixture name, any gas component name, and any ratio value.

6..4 4..8 8

SSuu

bbmmeennu ““GGaass FFlloow w AAllaarr

The DFM provides the user with a flexible Alarm warning system that monitors the Fluid Flow for all conditions that fall outside configurable limits, as well as visual feedback for the user via the OLED, status LED or an SSR output. The Flow Alarm has several attributes which may be configured by the user via OLED/joystick interface or digital communication interface. These attrributes control the conditions that cause the Alarm to occur and specify actions to be taken when the flow rate is outside the specified conditions.

m m””

nnuu SSeelleeccttii

oonn

1 Mixture

Flow Alarm conditions become true when the current flow reading is equal to or higher or lower than the corresponding values of High and Low Flow Alarm lev els. Alarm action can be assigned with a present Delay interval of 0 to 3600 seconds before activating the SSR output. In most applications, the user will want to have a brief delay (2-10 seconds) to qualify that the flow rate is really settled at a chosen level and has n ot spiked because of some interference. The Latch Mode control feature allows SSR output to be latched on or to follow the corresponding Alarm status.

www.GlobalTestSupply.com

The following settings are available for the Flow Alarm (see

NOTE: The value of the High Flow Alarm must be greater than the value of the Low Flow Alarm.

NOTE: The value of the Low Flow Alarm must be less than the value of the High Flow Alarm.



a) Flow Alarm Mode (Tabular entry)

This function determines whether the Flow Alarm is Enabled or Disabled, the only two selections available. The default entry is Disabled. Alarm Mode selections can be set with the joystick UP and DN buttons, and are accepted by pressing the joystick equivalent of the

ENT

button.

b) Low Flow Alarm (Numerical entry)

The limit of the required Low Flow Alarm value can be entered in increments of 0.1%, from 0 to 109.9% FS (Full Scale). If a Low Alarm occurs, and SSR output is assigned to the Low Flow Alarm Event (see Section 6.4.13.5), the SSR output will be activated when the flow falls below the Low Flow Alarm value. The Low Flow Alarm condition is also indicated on the corresponding Process Information screen by alternating every second between units of measure and the alert “Lo!” (meaning Low).

c) High Flow A larm (Nu merical en t ry)

Figure 12

The limit of the required High Flow Alarm value can be entered in increments of 0.1%, from 0 to 110% FS (Full Scale). If a High Alarm occurs, and the SSR output is assigned to the High Flow Alarm Event (see Section 6.4.13.5), the SSR output will be activated when the flo w reading exceeds the High Flow Alarm value.

The High Flow Alarm condition is also indicated on the corresponding Process Information screen by alternating every second between units of measure and the alert “Hi!” (meaning High).

d) Flow Alarm Action Delay (Numerical entry)

The Flow Alarm Action Delay is a time period in seconds that the Flow Rate value may remain above the High limit or below the Low limit before an Alarm condition is activated. Valid settings are in the range of 0 to 3600 seconds. The default value is 0: no delay.

www.GlobalTestSupply.com

e) Flow Alarm Power On Delay (Numerical entry)

Sometimes it is convenient to enable the Flow Alarm only after a specified power-up delay interval. The “Flow Alarm Power On Delay” option allows the user to set a specified time interval which must elapse from the moment of the device power-up event before the Flow Alarm function will be activated. Valid settings are in the range of 0 to 3600 seconds. The default value is 0: no delay.

f) Flow Alarm Action Latch (Tabular entry)

The Flow Alarm Action Latch settings control the Latch features. If SSR output is assigned to the Flow Alarm event, in some cases the Flow Alarm Latch feature may be desirable.

The following settings are available: Enabled or Disabled. By default, the Flow Alarm is nonlatching, which means that the Alarm action is indicated only while the monitored Flow Rate value exceeds the specified conditions that have been set.

6.4.9

The DFM provides the user with a flexible Alarm system that monitors the Fluid Pressure for conditions that fall outside configurable limits and provides visual feedback for the user via the OLED, status LED or an SSR output. The Pressure Alarm has several attributes which may be configured by the user via the OLED/joystick interface or digital communication interface. These attributes control the conditions that cause the Alarm to occur and specify actions to be taken when the pressure reading is outside the specified conditions.

Pressure Alarm conditions become true when the current pressure reading is equal to, higher than or l ower than the levels.

Alarm action can be assigned with a preset Delay Interval (0-3600 seconds) to activate the SSR output. The Latch Mode control feature allows SSR output to be latched on or follow the

The following settings are available for the Pressure Alarm (see

Submenu “Gas Pressure Alarm”

corresponding values of High and Low Pressure Alarm

corresponding Alarm status.

a) Pressure Alarm Mode (Tabular entry)

This function determines whether the Pressure Alarm is Enabled or Disabled, the two selections available. The default entry is Disabled. can be set with the Joystick joystick equivalent of an

ENT

and

button.

buttons and are accepted by pressing the

Figure 12):

Alarm Mode selections

www.GlobalTestSupply.com

b) Low Pressure Alarm (Numerical entry)



NOTE:

value of the High Pressure Alarm.



NOTE:

the value of the Low Pressure Alarm.

The limit of required Low Pressure Alarm value can be entered in currently selected pressure units, in increments of 0.1% of the pressure full scale range from 0.0 to 99.9%.

If a Low Alarm occurs, and SSR output is assigned to the Low Pressure Alarm event (see Section 6.4.13.5) the SSR output will be activated when the pressure is less than the Low Pressure Alarm value.

The Low Pressure Alarm condition is also indicated on the corresponding Process Information Screen by alternating every second between units of measure and the alert "LOW!"

The value of the Low Pressure Alarm must be less than the

cc))HHiigghh PPrree

dd))PPrree

e) Pressure Alarm Power On Delay (Numerical entry)

ssssuurree AAllaarrm

The limit of required High Pressure Alarm value can be entered in currently selected pressure units, in increments of 0.1% of the pressure sensor full scale range from 0.1 to 100%.

If a High Alarm occurs, and SSR output is assigned to the High Pressure Alarm event (see Section 6.4.13.5), the SSR output will be activated when the pressure reading is more than the High Pressure Alarm value.

The High Pressure Alarm condition is also indicated on the corresponding Process Information Screen by alternating every second between units of measure and the alert "HIGH!"

ssssuurree AAllaarrm AAccttiioonn DDeellaay

The Pressure Alarm Action Delay is a time period in seconds that the Pressure Reading value may remain above the High limit or below the Low limit before an Alarm condition is activated. Valid settings are in the range of 0 to 3600 seconds. The default value is 0: no delay.

((NNuummee

rriiccaall eennttrryy)

The value of the High Pressure Alarm must be greater than

((NNuummee

rriiccaall eennttrryy)

Sometimes it is convenient to enable the Pressure Alarm only after a specified power-up delay interval. The “Pressure Alarm Power On Delay” option allows the user to set a specified time interval which must elapse from the moment of the device power-up event before the Pressure Alarm function will be activated. Valid settings are in the range of 0 to

www.GlobalTestSupply.com

3600 seconds. The default value is 0: no delay.

f) Pressure Alarm Action Latch (Tabular entry)

The Pressure Alarm Action Latch settings control the Latch features. If SSR output is assigned to the Pressure Alarm event, in some cases the Pressure Alarm Latch feature may be desirable.

The following settings are available: Enabled or Disabled. By default, the Pressure Alarm is non-latching, which means that the Alarm action is indicated only while the monitored Pressure reading value exceeds the specified conditions that have been set.

6..4 4..110

The DFM provides the user with a flexible Alarm system that monitors the Fluid Temperature for conditions that fall outside configurable limits and provides visual feedback for the user via the OLED, status LED or an SSR output. The Temperature Alarm has several attributes which may be configured by the user via the OLED/joystick interface or digital communication interface. These attributes control the conditions which cause the Alarm to occur and specify actions to be taken when the temperature reading rate is outside the specified conditions.

Temperature Alarm conditions become true when the current temperature reading is equal to, or higher or lower than, corresponding values of High and Low Temperature Alarm levels.

Alarm action can be assigned with preset Delay Interval (0-3600 seconds) to activate the SSR output. The Latch Mode control feature al lows SSR output to be latched on or follow the corresponding Alarm status.

Following settings are available for Temperature Alarm (see Figure 12):

a) Temperature Alarm Mode (Tabular entry)

SSuu

bbmmeennu ""GGaass Tee

This function determines whether the Temperature Alarm is Enabled or Disabled. Two selections are available: Enabled or Disabled. The default entry is Disabled. Alarm Mode selections can be set with the Joystick accepted by pressing the joystick equivalent of an

m mppeerraattuurree AAll

aarr

ENT

m m""

and

button.

buttons and are

b) Low Temperature Alarm (Numerical entry)

The limit for the Low Temperature Alarm value can be entered in currently selected temperature units, in increments of 0.1 degree within the range of

-20 °C to 69.9 °C. If a Low Alarm occurs, and SSR output is assigned to the Low Temperature

Alarm event (see Section 6.4.13.5), the SSR output will be activated when the temperature is lower than the preset Low Temperature Alarm value.

www.GlobalTestSupply.com

The Low Temperature Alarm condition is also indicated on the



NOTE:

the value of the High Pres



NOTE:

High Pressure Alarm must be greater than

the value of the Low Pressure Alarm.

corresponding Process Information Screen by alternating every second between units of measure and the “L” alert, meaning Low.

The value of the Low Pressure Alarm must be less than

sure Alarm.

cc))HHiigghh Teemmppeerraa

The limit of the required High Temperature Alarm value can be entered in currently selected units, in increments of 0.1 degree within the range of

-19.9 °C to 70.0 °C. If a High Alarm occurs, and SSR output is assigned to the High Temperature Alarm event (see Section 6.4.13.5), the SSR output will be activated when the Temperature reading is greater than the High Temperature Alarm value.

The High Temperature Alarm condition is also indicated on the corresponding Proess Information Screen by alternating every second between units of measure and the “H” alert, meaning High .

dd))Teemmppeerraa

The Temperature Alarm Action Delay is a time period in seconds that the Temperature reading value may remain above the High limit or below the Low limit before an Alarm condition is activated. Valid settings are in the range of 0 to 3600 seconds. The default valus is 0: no delay.

ee))Teemmppeerraa

Sometimes it is convenient to enable the Temperature Alarm only after a specified power-up delay interval. The “Temperature Alarm Power On Delay” option allows the user to set a specified time interval that will have to elapse from the device power-up event before the Temperature Alarm function will be activated. Valid settings are in the range of 0 to 3600 seconds. The default value is 0: no delay .

ttuurre AAllaarrm

ttuurree AAllaarrm AAccttiioonn DDeellaay

ttuurree AAllaarrm PPoowweer OOnn DDeellaay

((NNuummeerriiccaal ee

The value of the

((NNuummeerriiccaa

nnttryy

)

ll eennttrryy

((NNuummeerriiccaa

)

ll eennttrryy

)

ff))Teemmppeerraa

TThhe Teemmppeerraattuurre AAllaarrm AAccttiioon LLaatt aa ff

eeaattuurre mmaay bbee ddeessiirraabbllee

ttuurree AAllaarrm AAccttiioonn LLaattcch

ssssiiggnneedd

ttoo tthhe Teemmppeerraattuurre AAllaarrm EEvveenntt, iin ssoomme ccaasseess

www.GlobalTestSupply.com

((TTaa

bbuullaar eennttryy

cch sseettttiinnggs ccoonnttrrool

)

tthhe LLaatt

cch

eeaattuurree. IIf

tthhe Teemmppeerraattuurre AAllaarrm LLaatt

SSSSR oouuttppuut ii

cch

Two settings are available: Disabled or Enabled. By default, the



NOTE: Before enabling the Totalizer, ensure that all Totalizer settings are configured properly. Totalizer Start values must be entered i n the currently active Volumetric or Mass flow engineering unit. The Totalizer will not totalize until the Process Flow Rate becomes equal to or greater than the Totalizer St art value. Tota l izer Event values must also be entered in cu Event (action) is not required at a preset total volume feature, set the Totalizer Event value to zero (which is the default setting).

Temperature Alarm is non-latching. This means that the Alarm Action is indicated only if the monitored Temperature reading exceeds the userspecified conditions.

6..4 4..111 Toottaa

The DFM provides the user with two independent Programmable Flow Totalizers. The total volume (mass) of the flowing fluid is calculated by integrating the actual instantaneous fluid mass flow rate with respect to time. Totalizer reading values are stored in the EEPROM and saved every second. In the case of power interruption, the last saved Totalizer value will be loaded at the next power on cycle, so the Totalizer reading will not be lost. Use the “Totalizer Menu” to navigate to the “Totalizer #1” or "Totalizer #2" menu options. The following settings are available for Totalizer #1 and Totalizer #2 (see Figure 12):

a) Totalizer Mode (Tabular entry)

This option determines whether Totalizer is Enabled or Disabled, the only two selections be set with the joystick equivalent of an

lliizzeerrs SSeettttiinn

available. The default entry is Disabled. Totalizer Mode

ENT

and

button.

ggss

buttons and are accepted by pressing the joystick

selections can

rrently act ive volume- or mass-based engineering units. If the Totalizer

b) Totalizer Flow Start (Numerical entry)

This option allows the start of the Totalizer at a preset flow rate. The Totalizer will not totalize until the process flow rate becomes equal to or greater than the Totalizer Flow Start value. The limit of required Totalizer Flow Start value can be entered in

increments of 0.1%, from 0 - 100% FS.

c) Totalizer Action Volume (Numerical entry)

This option allows the user to activate a preset required action when the Totalizer reaches a preset volume. Totalizer Action Volume value must be entered in currently active volume- / mass-based engineering units. A Totalizer Action Event becomes true when the Totalizer reading is more than or equal to the preset "Totalizer Action Volume”. If the Totalizer feature

www.GlobalTestSupply.com

is not required, set “Totalizer Action Volume” value to zero; this is the default setting.

d) Totalizer Power On Delay (Numerical entry)

Sometimes it is convenient to start the Totalizer only after a specified power-up delay interval. Mass flow meters require some warm-up time from the power-up event in or d er to stabilize the process variable output and to get an accurate reading. The “Totalizer Power On Delay” option allows the user specify and set a time interval which must elapse from the device power-up event before the Totalizer will be activated. Valid settings are in the range of 0 to 3600 seconds. The default value is 0: no delay.

e) Totalizer Auto Reset (Tabular entry)

This option allows the automatic reset of the Totalizer when it reaches a preset Action Volume volume of flui d must be repeatedly dispensed into the process. Two selections are available: Enabled or Disabled. The default entry is Disabled. Totalizer Auto Reset selections can be set with the joystick UP and the joystick equivalent of an

f) Totalizer Auto Re set Delay (Numerical entry)

This option may be desirable when the “Totalizer Auto Reset” feature is enabled and a the range of 0 to 3600 seconds. T he default value is 0: no delay.

value. This feature may be convenient for batch processing, when a predefined

buttons and are accepted by pressing

ENT

button.

predefined delay is required before a new batch cycle starts. Valid settings are in

Reset T otalizer (Tabular entry)

Either Totalizer’s reading can be reset by selecting the “Reset Totalizer” menu option.

YES

A typical Totalizer Reset screen is shown below:

Reset Totalizer #1:

DO YOU WAN T

RESET TOTALIZER?

Figure 24: Reset Totalizer Screen

When the “YES” option is selected, Totalizer #1 will be reset. A confirmation screen will appear (see Figure 25).

www.GlobalTestSupply.com



************************** Totalizer has been reset **************************

Figure 25: Totalizer Reset Confirmation

A local maintenance push button is available to manually reset the Totalizer in the field for DFM meters without the OLED/joystick option. The maintenance push button is located on the “Multi-Functional Push-Button Operation”).

NOTE: If the Totalizer “Lock Reset Function” is enabled, the Reset feature is not functional and therefore the Totalizer cannot be reset. The “Lock Reset Function” parameter can only be changed manually

using supplied "DFM Configuration Utility" software from "Terminal" mode using ASCII "T" command with "L" argument (see ASCII

Command Set in Section 9.2). By default, the Totalizer “Lock Reset Function” is disabled, but it can be enabled by the user if the Totalizer reading in the user application must be preserved for the lifetime of the instrument.

left side of the flow meter (see Section 6.5

Press any key...

h) Totalizer Reading Decimal Point (DP) Precision (Numerical entry)

Sometimes it is convenient to have Totalizer reading decimal point

on much lower than Flow Rate readings (for example, when the

precisi Totalizer accumulates readings over a long period of time). The “Totalizer DP Precision” parameter allows the user to decrease the number of digits after the decimal point for Totalizer readings from 0 to -5. For example, if the Flow Reading has precision of 3 digits after the decimal point, setting the “Totalizer DP Precision” parameter to -2 will result in Totalizer reading precision of 1 digit after the decimal point. Fewer digits after the decimal point allow for more digits in front of it. Totalizer reading field has 10 digits.

6..4 4..112

The flow Pulse Output operates independently from the Totalizers and is based on configuration settings (see Figure 12) which can provide pulse frequency proportional to instantaneous fluid mass flow rate.

SSuu

bbm meennu ““PPuullsse

OOuuttppuutt

”

www.GlobalTestSupply.com

The OLED/joystick interface and digital communication interface commands are



NOTE:

(0.05 milliseconds equal pulse rate to no faster than one pulse every second.



provided to:

•

Enable/Disable Pulse Output

•

Start Pulse Output at a preset flow rate (0.0 - 100.0% FS)

•

Configure Unit/Pulse value (in current engineering units)

•

Configure Pulse Active On Time (50 - 6553 ms)

The Pulse Output minimum Active On time is 50 milliseconds

second). The Pulse Output cannot operate faster than one pulse every 100

(0.1 second). A good rule to follow is to set the Unit/Pulse value

to the maximum flow in the same units per second. This will limit the

For example: Maximum flow rate = 120 gr/min (120 gr/min = 2 gr/sec) If unit per pulse is set to 120 gr per pulse, the Pulse Output will pulse once every minute. If unit per pulse is set to 2 gr per pulse, the Pulse Output will pulse once every second.

The Pulse Output incorporates the pulse output queue, which accumulates pulses if the Pulse Output is a ccu mulat in g pr oce ss flow fast er than the pulse output hardware can produce. The queue will allow the pulses to “catch up” later if the flow rate decreases. A better practice is to slow down the Pulse Output by increasing the value in the Unit/Pulse setting in the Pulse Output menu (see Figure 12).

NOTE:

(SSR) output must be assigned to the “Pulse Output” function (see Section 6.4.13.5). The Pulse output signal will be accessible via SSR output (pins 1 and 2) on the DFM 8-pin MiniDIN connector (see Figure 1 for proper wiring connections).

6..44..113

6..44..1133..1

Thhiis mmee

nnuu sseelleeccttii

pprree

ssssuurree

Foolllloowwiinngg ooppttii

If Pulse Output feature is required, the Solid State Relay

GGeenneerraal SSee

SSTTP / NNTTP CCoonnddiittiioonnss

oon aa

coonnddiittiioonns oo

oonns aarre aavvaa

ttttiinn

lllloows the uusseerr to sseet ddeess rr

nnoorrmmaall

tteemmppeerraattuurre aa

iillaabblle iinn tthhiiss mmee

www.GlobalTestSupply.com

ggss

nnuu sseelleeccttii

iirreed ssttaa

nnddaarrdd tteemmppeerraattuurre aa

nnd pprree

ssssuurree ccoonnddiittiioonnss.

oonn::

nnd

Sttaannddaarrd Teemmppeerraattuurree



NOTE:

PI screens which are not Enabled (ma sked) will be skipped. PI Screen reading) cannot be Disabled.



NOTE:

Once Standard Temperature/Pressure and/or Normal Temperature/ Pressure shown on the i will change as well.



NOTE:

˚F

(21.1



NOTE:

Pressure is 14.696 PSIA (1.0 atm).

Sttaannddaarrd PPrreessssuurr Noorrmmaal Teemmppeerraa Noorrmmaal PPrree

Standard Temperature and Normal Temperature menu selections allow the user to first select desired temperature units of measure: °C, °F, °K, or °R. By default, currently active temperature units will be selected. Once the units are selected, the use can adjust the desired temperature value and press the joystick equivalent of an ENT button to save it. By default, currently stored values will be displayed.

Standard Pressure and Norm al Pressure menu sel ections allo w th e user to first sel ec t the desired pressure units of me asure. By default, c u rrently activ e pr es sure units will be selected. Once the units are selected, the user can adjust the desired pressure value and then press the joystick e quivalent of an displayed.

ttuurree

ssssuurree

The factory default value for the Standard Temperature is 70

˚C), and for Normal Temperature is 32 ˚F (0.0 ˚C).

ENT

button to save it. By default, currently stored values will be

The factory default value for both Standard and Normal

values are changed, the corresponding PI mass flow readings

nstrument display or transmitted via digital or analog interface

6..44..1133..2 DDii

The local OLED Process Information screens can be configured to be static (manual control) or dynamic (automatic sequencing). In the static mode, pressing the joystick UP allows the user to page through the PI screens in the forward direction, while pressing the joystick DN pages through the PI screens in the opposite direction. When the last PI screen is reached, the firmware “wraps around” and scrolls to the initial PI screen once again.

ssppllaay aannd PPrroocceesss IInnffoorrmm

#1 (Mass Flow Rate, Pressure, Temperature and Totalizer #1

www.GlobalTestSupply.com

aattiioon ((PPII)) SS

ccrr

eeeenns

Thhee

PI Screen Config:

Screen #1 [*]

Sccrr

eeeen

##22 [ [**]

ffoolllloowwiinng sseettttiinnggss aarre aavvaa

DDiissppllaay MMoodd

This option determines whether the display screens are in static (manual control) or dynamic (automatic sequencing) mode. Two selections are available: Static or Dynamic. The default entry is Static (manual control).

SSccrr

eeeenn CCyycclle Tiimm

This menu selection defines the time interval in seconds for each PI screen to be displayed in the dynamic mode (automatic sequencing). Screen Cycle Time can be set to any value between 1 and 3600 seconds (numerical entry).

PI Screen Configuration Using Screen Configuration settings, the user can enable (unmask) or disable (mask) up to 6 different process variable combinations (see Figure

26). The screen is Enabled if the checkbox on the same line as the corresponding screen is selected: [*]. If the screen is disabled, it will be skipped. By default, the instrument is shipped from the factory with all PI screens enabled, as indicated in Figure 26.

iillaabblle

ffoor OOLLEEDD DDiissppllaa

yy::

d) OLED Operational Brightness (Numerical entry)

Sccrr

eeeen

##33 [[**]

Sccrr

eeeen

##44 [[**]

Sccrr

eeeen

##55 [[**]

Sccrr

eeeen

##66 [[**]

Figure 26: PI Screen Configuration

As explained, in the example shown above, all PI screens are enabled. Each PI screen is assigned to change PI Screen Configuration the joystick will appear or disappear on the right side of the corresponding screen line. The asterisk signifies that the screen is enabled. In order to disable corresponding asterisk must be removed. To accept and save new PI Screen Configuration settings in the device’s nonvolatile memory, press the joystick button.

Using OLED Operational Brightness settings, the user can adjust the desired level of OLED brightness during normal operation (when the screensaver is not active). The OLED brightness has 256 different levels.

a corresponding bit in the PI Screen Register. In order to

, the user should select the desired screen using

and

buttons and

then press the

RIGHT

button. The asterisk

the screen, the

ENT

www.GlobalTestSupply.com



NOTE:

for

By default, the brightness level is set to 127 which is the optimal level

room temperature (20 °C or 70 °F).

e) OLED Screensaver Mode

OLED is subject to burn-i n. It can retain ima ges on the scree n tempor ar ily and, in some cases even permanently if it is left static for too long. In order to mitigate this potential problem, the screensaver feature is provided.

This feature has 4 different modes:

- Disabled (no screensaver)

- Low Brightness

- Vertical Scrolling (default)

- OLED Off

f ) OLED Screensaver (SS ) Time Out Feature (Numerical entr y )

This menu selection defines a time interval in seconds from the moment the local

Esc

button or joystick interface was last used (or, if neither was used, from the power up activates the local to normal “Oper ational Brightness starting a new delay cycle. The default setting is 900

g) OLED Screen Saver Brightness (Nu merical entry)

Using OLED Screen Saver Brightness settings, the user can adjust the desired level of the screensaver is

event) to the moment the Screensaver is activated. Each time the user

Esc

button or the joystick interface, the OLED bright ness reverts

Level” and the internal timer resets to zero,

seconds (15 minutes).

OLED brightness during "Low Brightness" screensaver mode (when the

active). The brightness has 127 different levels.

www.GlobalTestSupply.com



NOTE: The instrument is shipped from the factory with the

communication interface type set according to your order.



NOTE:

In some cases, selecting “Elevated” precision may result in unstable readings (the last digit constantly changes). In such cases, we recommend switchin g t he decimal point pr ecision to th



NOTE: If Screensaver mode is active and has been changed, new

settings will be activated in the next Screensaver cycle (after the Esc button or joystick interface was activated to disable the currently active screensaver). The OLED “Screensaver Brightness Level”

parameter is

only applicable for “Low Brightness” Screensaver mode. In “Vertical Scrolling” mode, the normal operational brightness level will be activated. If OLED display is not used in the user application (e.g., the meter is installed in a remote encl

osure), we recommend setting the

h) Flow Rate Precision (Tabular entry)

The DFM Flow Meter calculates Flow Rate Precision automatically, based on selected

of measure and current gas full scale flow rate to keep the reading. By default,

units the Flow Rate Precision is set to “Normal”. In cases where more digits after the decimal point are required, the user can change decimal point precision to the “Elevated” level (one more digit

after the decimal point).

e “Normal” level.

6..4 4..11

3 3..3 SSuu

Thhiis mmee

nnuu sseelleeccttii

yypp

ee (RRSS--223322 oor RRSS--448855)), sspp

tt tteerrmmiinnaattii

The following setti

oon moodde ((

UUART Trraann

The DFM instrument is equipped with a universal transceiver which supports both RS-232 and RS-485 interfaces. The following settings are available:

bbm meennu ““

oon aa

oonnlly aa

ngs are available for “Communication Setti

ssc ceeiivveer MMood de ((Taa

• Disabled

• RS-232

• RS-484

CCoom mm m

lllloowwss tthhe ccoonn

pppp

lliiccaabbllee ffoor

www.GlobalTestSupply.com

iffi

gguurraattii

eeeed ((BBaa

RRSS-

bbu ullaar eennt tryy

uunniicca attiioonn PPoo

uud

oonn oo

ff a mmaaiinn ddiiggiittaal ccoo

rraattee) aannd ddeevviicce

44885 iinntteerffaaccee))..

)

rrt SSeettttiinn

mmmm

RRSS-

44885 bbuus aa

ngs” (see Figure 12):

ggss”

uunniiccaattiioon iinntteerffaaccee

ddddrree

sss aa

nnd

bb))BBaauudd RRaattee SSee



NOTE: Before changing the communic ati on inter fa ce ty pe, m ake sure

that the host device (PC or PLC) has the same interface type. Connecting the instrument to the wrong communication interface may cause damage or result in faulty operation of the electronics circuitry.



NOTE: Do not assign the same RS-485 address for two or more devices on the same RS same address are connected to one RS communication communication errors to occur.



NOTE:

Address 00 is reserved for global addressing. Do not assign the global address to any device. When a command with the global address is sent, all devices on the RS command but do not reply with an acknowledgement message.

This option determines the device’s digital communication interface speed (Baud rate). It can be set to one of the following:

• 1200

• 2400

• 4800

• 9600

• 19200

• 38400

• 57600

• 115200

By default, the device is shipped from the factory with its baud rate set to

9600.

c) RS-485 Bus Address (Numerical entry)

The RS-232 interface does not require bus addressing. The RS-485 interface, however, does require 2 hexadecimal characters of the address to be assigned. By default, each flow meter is shipped with its RS-485 address set to 11 hexadecimal. When more than one device is present on the RS-485, each device must have a unique address. The 2 characters of the address in the hexadecimal representation can be changed from 01 to FF.

ttttiinnggss ((TTaa

NOTE:

the baud rate of the host PC and/or PLC that it is connected to.

bbuullaar eennttryy

The baud rate set on the DFM meter should always match

)

-485 bus execute the

-485 bus. If two or more devices with the

-485 network, a

collision will take place on the bus, causing

www.GlobalTestSupply.com

d) RS-485 Termination (applicable to RS-485 only)



NOTE:

Modbus the resulting in commu



NOTE: Do not Enable Termination if the transceiver is set to RS232 mode. Doing im default setting is Disabled.

A reflection in a transmission line is the result of an impedance discontinuity that a traveling wave sees as it propagates down the line. To minimize such reflections from the ends of the RS-485 cable, the user must place a Line Termination (LT) near each of the two ends of the RS-485 bus. If you are connecting a DFM meter as the last device in the end of a long (more than 100 meters) transmission line, you can use this menu selection to internally connect a 120Ω resistor between the RS-485 + and - wires.

so will cause damage to the instrument or

proper operation of the communication interface. The factory

6..4 4..11

3 3..4 SSuu

If the DFM flow meter is equipped with Modbus interface, this menu selection allows the user to change the Modbus device ID (address) and its communication parameters.

Modbus is a standard protocol developed by A.E.G. Schnieder. The DFM supports only the Modbus RTU version. Modbus RTU enable a computer or a PLC to read and write directly to registers containing the meter’s parameters (see technical document TD-DFM CMOD-0118 “Modbus RTU slave interface for DWYER digital mass flow instruments” for a detailed description of supported Modbus functions and registers).

The following parameters are available for “M

bbmmeennu ““

M M

ooddbbuus IInntteerrffaaccee”” ((oppttiioonnaal))

odbus Settings” (see Figure 12

DDeevviiccee IIDD ((AAddddrree

Decimal representation ranges from 1 to 247. By default, all DFM meters are equipped with a Modbus interface shipped from the factory with the Device ID parameter set to decimal 11.

BBaauudd RRaattee SSee

one Modbus network, a communication collision will take place on the

TThhiiss

ooppttii

oonn ddeetteerrmmiinneess the ddeevviiccee’s MM

o oonne oo

ff tthhe

ssss

) ((NNuummeerriiccaa

ttttiinnggss ((TTaa

Do not assign the same ID address for two or more devices on the same

segment. If two or more devices with the same address are connected to

nication errors.

ffoolllloowwiinngg::

11220000 22440000 44880000

ll eennttrryy

bbuullaar eennttryy

)

ooddbbuuss iinntteerffaacce sspp

eeeed ((BBaa

www.GlobalTestSupply.com

uud

rraattee). It ccaan bbe ssee

bus,

99660000

Disabled:

No action (output is not assigned to any events and relay is not energized)

Low Flow Alarm:

(L) Low Flow Alarm condition

High Flow Alarm:

(H) High Flow Alarm condition

Range between H&L:

(R) Range between High and Low Flow Alarm conditions

Low P. Alarm:

(L) Low Pressure Alarm condition

High P. Alarm:

(H) High Pressure Alarm condition

P. Range H-L:

(R) Range between High and Low Pressure Alarm conditions

Low T. Alarm:

(L) Low Temperature Alarm condition

High T. Alarm:

(H) High Temperature Alarm condition

T. Range H-L:

(R) Range between High and Low Temperature Alarm conditions



NOTE:

If multiple meters are connected to the Modbus Master controller device, they all should have the same baud rate settings as the Master.

119922000 338844000 557766000 111155220000

By default, the device is shipped from the factory with its baud rate set at

9600.

cc))MM

ooddbbuuss CCoo

This parameter can be set to either None, Odd, or Even. By default, the Parity parameter is set to None. In real applications, this parameter should follow Parity settings used in the Modbus Master controller.

dd))MM

ooddbbuuss CCoo

This parameter can be set to either One (1) or Two (2). By default, the Stop Bit parameter is set to 2. In real applications, this parameter should follow Stop Bit settings used in the Modbus Master controller.

6..4 4..11

3 3..5 RReellaay AA

mmmm

uunniiccaattiioon PPaarriittyy ((TTaa

mmmm

uunniiccaattiioon SSttoopp BBiit

ssssiiggnnm meenntt

bbuullaar eennttryy

((TTaa

bbuullaar eennttryy

)

One set of the SPST Solid State Relay outputs is provided to actuate users

upplied equipment. It is programmable via digital interface or local OLED/ joystick interface such that the relay can be made to switch when a specified event occurs (e.g., when a low or high flow alarm limit is exceeded or when one of the two totalizers reaches a specified value).

The user can configure relay action from the following 16 options:

www.GlobalTestSupply.com

Totalizer#1 > Limit:

(T1) Totalizer#1 exceeded preset limit volume

Totalizer#2 > Limit:

(T2) Totalizer#2 exceeded preset limit volume

Pulse Output:

Pulse Output Queue is overloaded

Alarm Events:

One or more Alarm Events are active

Diagnostic Events:

One or more Diagnostic Events are active

Manual On (Enabled):

(M) Activated regardless of the Alarm, Totalizers or

other conditions. By default, relay is Disabled (not

energized)

CAUTION: The 4-20 mA current loop output is self-powered (sourcing non source to the output signals. (See Section 3.2 for proper wiring connections.)



NOTE

Before changing “Analog Output Interface” mode, make sure the load impedance is within the corresponding limits stated above. Failure to do so might cause damage to the analog output circuitry or result in erroneous readings.



NOTE: Relay terminals are accessible via the DFM meter’s 8-pin MiniDIN connector (pins 1 and 2) and have maximum 48VDC voltage and 0.4A current ratings. See Figure 1 and Table I for proper wiring connections.

6..4 4..11

3 3..6 AAnnaalloogg OOuuttppuutt CCoonnfifigguu

The DFM series Mass Flow Meters are equipped with calibrated 0-5Vdc, 0-10Vdc, and 4-20 mA output signals. The following options are provided for analog output:

rraattiioon

aa))AAnnaalloogg OO

The user can select one of the following:

bb))AAnnaalloogg OO

The DFM analog output calibration involves calculation and storing the offset and span variables in the EEPROM based on two calibration points (0 and 100% F.S.). The 0-5 and 0-10 outputs have only scale variables, and the 4-20 mA output has offset and scale variables.

uuttppuutt MM

ooddee ((TTaa

bbuullaar eennttryy

• 0-5 Vdc (3000Ω minimum load impedance)

• 0-10 Vdc (5000Ω minimum load impedance)

• 4-20 mA (sourcing type, 500Ω maximum current loop resistance)

-isolated type). Do NOT connect an external voltage

uuttppuutt CCaalliibbrraattiioon

)

www.GlobalTestSupply.com



NOTE:

The analog outputs available in the DFM meter were calibrated at the factory. There is no need to perform analog output calibration unless the analog to digital converter (DAC) IC, output amplifier IC, or passive components from analog output circuitries were replaced or your factory customer support representative suggested recalibration. Any alteration of the analog output scaling variables in the EEPROM will void the calibration warranty supplied with the instrument.

Power up the DFM meter for at least 30 minutes prior to commencing the calibration procedure. Observe the current analog output mode settings.

For 0-5 or 0-10 Vdc output calibration: Connect the corresponding type of measurement device (voltmeter) to pins 6 (plus) and 4 (minus) of the 8-pin MiniDI N c onne ctor .

For 4-20 mA output calibration: Connect the corresponding type of measurement device (ampmeter) to pins 6 (plus) and 4 (minus) of the 8-pin MiniDI N c onne ctor .

Follow firmware prompts and adjust calibr at ion poin t v alue s acc ordin g t o your measurement device reading by use of the joystick UP, DN, LEFT and RIGHT buttons. If you need to abort calibration, press the Esc button. When the calibration is complete, the firmware will display new offset and span values and ask the user to press the joystick ENT button to save the new calibration variables to the EEPROM, or to press the Esc button to abort calibration and exit without saving any changes. When the process is done, the firmware will prompt the user with a confirmation message.

cc))AAnnaalloogg OO

uuttppuutt Teess

This menu selection must be used only for troubleshoo t in g purpos es as requested by your customer support representative. It allows for emulating analog output readings by entering a desired flow rate reading in % of full scale, from 0.0 to 110.0%.

www.GlobalTestSupply.com

CAUTION: When “Analog Output Test” is sel ect ed, the o utp ut reading does not represent

any actual Process Information (PI)

variable (flow rate reading).

Adjust the desire flow output value using the joystick UP, DN, LEFT and RIGHT buttons. Press the joystick ENT button to activate analog output. To abort the analog output test mode, press the Esc button. Once the test mode is deactivated, the analog output should represent actual flow rate readings.

6..4 4..11

3 3..7 SS

ttaattuuss LLEED SSeettttiinn

ggss

DFM series Mass Flow M signaling a variety of different events with combinations of three colors (red, green and amber) and a specific time pattern. Status LED operation can be adjusted/ filtered for the indication of different events based on custom user needs.

Status LED can be set to the following modes (see Figure 12):

1. Normal, which supports the following events:

1.1 Auto Zero Failure (constant RED)

1.2 Fatal Error (constant RED, requiring the system to be reset for recovery)

1.3 User entry via side Push Button (specific pattern limited by a time interval up to 35 seconds)

1.4 Power Up Sensor Warm Up interval (1 to 3 seconds). (Constant

AMBER). This can be interrupted only by User PB entry or Fatal Error.

2. Monitoring Flow Alarm and Flow Totalizer events (default settings):

2.1 High Flow Alarm RED/OFF (alternating every second)

2.2 Low Flow Alarm GREEN/OFF (alternating every second)

2.3 Totalizer#1 Event AMBER/OFF (alternating every second)

2.4 Totalizer#2 Event AMBER/OFF (alternating every second)

2.5 High Flow Alarm and Totalizer#1 Event RED/AMBER (alternating every second)

2.6 High Flow Alarm and Totalizer#2 Event RED/AMBER (alternating every 2 seconds)

2.7 Low Flow Alarm and Totalizer#1 Event GREEN/AMBER (alternating every second)

2.8 Low Flow Alarm and Totalizer#2 Event GREEN/AMBER (alternating every 2 seconds)

2.9 Both Totalizer#1 and Totalizer#2 Events AMBER/OFF (on for 3 seconds, off for 1 second)

2.10 High Flow Alarm and Totalizer#1 & #2 Events AMBER/RED (AMBER

for 3 seconds, RED for 1 second)

2.11 Low Flow Alarm and Totalizer#1 & #2 Events AMBER/GREEN (AMBER

for 3 seconds, GREEN for 1 second)

eters are equipped with dual color LED which allows

www.GlobalTestSupply.com

3. Monitoring Alarm Events only (any active Alarm event will trigger LED



NOTE:

powered established. For better result Zero at least 30 minutes after power was applied to the flow meter.

indication): GREEN/OFF (alternating every second)

4. Monitoring Diagnostic Events only (any active Diagnostic event will trigger LED indication): RED/OFF (alternating every second)

5. Test and Configuration Communication Interface Monitoring:

5.1 Data Received (RX activity) RED LED flashing momentarily (about 200 ms or less)

5.2 Data Transmitted (TX activity) GREEN LED flashing momentarily (about 200 ms or less)

6. Modbus Communication Interface Monitoring (optional):

6.1 Data Received (RX activity) RED LED flashing momentarily (about 200 ms or less)

6.2 Data Transmitted (TX activity) GREEN LED flashing momentarily (about 200 ms or less)

6..44..1133..8 SSiiggnnaall CCoonnddiittiioonneer SSee

CAUTION: The signal conditioner parameters for your meter

were set at the factory to maintain the best performance. Do not change Signal Conditioner parameters unless so instructed by your technical support representative. Consult Dwyer Technical Support for more information.

6..4 4..114 SSeennssoorr ZZeerroo CCaalliibbrraattiioon

The DFM includes an auto zero function that, when activated, automatically adjusts the differential pressure sensors to read zero. The initial zero adjustment for your DFM was performed at the factory.

It is not required to perform zero calibration unless the device has zero reading offset with no flow conditions or the absolute pressure sensor reading is not accurate.

Before performing Zero Calibration, make sure the device is

up for at least 15 minutes and absolutely no flow condition is

ttttiinn

ggss

s, it is recomme nded that you start Auto

www.GlobalTestSupply.com

Shut off the gas flow into the DFM meter. To ensure that no seepage or



NOTE:

Actual differential pressure and temperature Analog to Digital

Converter (ADC) counts readings for

leaking occurs into the meter, it is good practice to temporarily disconnect the gas source. The Auto Zero may be initiated locally using optional OLED/ joystick interface (see Figure 12) or by pressing the multi-functional maintenance push button located on the left side of the meter, or via digital communication interface (see Figure 48: DFM Interface Connectors and Maintenance Push Button).

6..4 4..11

4 4..1 DDPP SSeennssoorr ZZeerroo CCaalliibbrraattiioon

To start DP sensor Auto Zero locally using OLED/joystick interface, navigate to “Sensor Zero Calibration” menu selection, then select “Start Auto Zero Now”. On a DFM meter with optional OLED, the following screen will appear:

Sttaarrtt AAuuttoo

bbssoolluutteelly NNoo FFllooww

STAARRT

Figure 27: Start Sensor Auto Zero

To start Auto Zero, select the YES option and push the joystick ENT button. The status LED will start flashing RED/GREEN (alternating every 2 seconds). The following screen will appe ar:

AUUTTO ZZEERROO IISS OONN

DPPTT::77660088000 99001

Figure 28: Sensor Auto Zero “On” Confirmation

ZZeerroo NNooww::

YEESS

!!!!!

DO YYOOU WAANN

AAUUTTOOZZEERROO?

your instrument may be different.

NOTE:

Internal Auto Zero process may take 5 to 15 seconds.

e DFM’s diiggiittaal ssii

If t

coouunntts

((wwiitthhiin ddeeffaauullt AAuutto ZZeerro Toolleerraannccee)), tthheen AAuutto ZZeerro iis

ggnnaall pprroocceessssoor wwaas aabbllee ttoo aaddjjuuss

www.GlobalTestSupply.com

t tthhe SSeennssoo

ccoonnssiiddeerreed ssuucccceessssffuull.

r rr

eeaaddii

nng wwiitthhiin 0 ±

TThhe sttaatt



NOTE:

powered for at least 15 minutes and absolutely no flow condition is established. For be Tare at least 30 minutes after power was

CAUTION: The AP Auto Tare procedure must be performed with



NOTE

: To initiate Differential Pressure Sensor Auto Zero Calibration

using the multifunctional maintenance push button, see Section 6.5.

uus LLEED ww

iillll

rreettuurrnn ttoo a

ccoonnssttaanntt GGRR

EEEEN

llii

gghht aa

nnd

tthhe ssccrreeeenn bbeelloow wwiillll aa

pppp

eeaarr:

***********************

AUTO ZERO IS

**********************

Press any Key...

Figure 29: Sensor Auto Zero Completed

If the device was unable to adjust the sensor reading to w ithin 0 ±7 counts, then Auto Zero is considered unsuccessful. A constant RED light will appear on the status LED. The user will be prompted with the “Auto Zero ERROR!” screen. If additional Auto Zero procedures yield the same error message, the sensor is most likely defective; arrange to return the meter for service.

6..4 4..11

4 4..2 SS

ttaarrt AAPP AAuuttoo T

The DFM instrument is equipped with a high accuracy, high resolution absolute pressure sensor which was calibrated at the factory and does not require additional calibration. Depending on actual installation conditions, however, during operation it may periodically require the auto tare procedure to increase accuracy.

aarre

DONE!

absolutely no flow conditions. Make sure both inlet and outlet ports of the instrument are connected to the atmosphere.

Before performing AP Auto Tare, make sure the device is

st results, we recommend starting AP Sensor

applied to the flow meter.

www.GlobalTestSupply.com



NOTE

The AP Sensor Tare procedure requires high accuracy (at least 0.2% of reading) absolute pressure sensor reference standard. The AP sensor Tare result will be as accurate as your reference absolute pressure sensor is

To start the AP sensor T are procedure locally using the O LED/joystick interface, select “Sensor Zero Calibration” from the main menu, then navigate to the “Start AP Auto Tare” menu selection. The “Start Absolute Pressure Senor Tare” screen will appear (see Figure 30).

Sttaarrtt

AAPP AAuuttoo Taarree::

YEESS

Oppeen PPoorrtts ttoo AAmmbbiieenn

DO YYOOU WANN STAARRT

AAPP T

Figure 30: Start AP (Absolute Pressure) Sensor Tare

To start the Absolute Pressure sensor tare, select the “YES” option and push the joystick ENT button. The following screen will appear:

Enter Ambient Press. According Refer. Std.

AARREE?

14.696 PSIA

Make Sure Inst. Ports

Are Open to

Atmosphere

Figure 31: Entering Ambient Pressure from Reference Standard

Enter ambient pressure reading according to the reference standard. Once this is done, press the joystick ENT button. The instrument will perform an AP sensor tare process. If it is successful, the screen will prompt the user with a confirmation message.

6..4 4..115

The DFM is equipped with Alarm and Diagnostics Events registers. These are available via digital interface and an optional OLED screen indication. The Alarm Event Register monitors non-critical alarm events related to the meter settings and process variables. The Diagnostic Event Register monitors critical diagnostic events related to meter performance and peripheral hardware conditions.

SSuu

bbmmeennu ““AAll

aarr

m ms aannd DDiiaaggnn

oossttiicc”

www.GlobalTestSupply.com

6..44..1155..1 AAll

CODE

Password Event (attempt to change password)

Thhee

ffoolllloowwiinng aallaarrm eevveennttss aarre

aarrm EEvveennt RReeggiisstteerr

ssuuppppoorrtteedd::

TABLE XIX: ALARM EVENTS REGISTER

EVENT NUMBER

1 2 3 4 5 6 7 8

9 10 11 12 13 14

There are actually three separate registers:

•

The Status Alarm Event Register, which holds each active alarm event (this is read only) The Mask Alarm Event Register, which allows the user to Enable or Disable monitoring for a par ticular event The Latch Alarm Event Register, which allows the user to Enable or Disable the latch feature for a particular event

ALARM EVENTS DESCRIPT ION

High Flow Alarm

Low Flow Alarm

Flow Between High and Low Limits Totalizer#1 Exceed Set Event Vol ume Limit Totalizer#2 E xceed Set Event Vol ume Limit

High Pressure Alarm

Low Pressure Alarm

Pressure between High and Low Limits

Low Temperat ure Alarm

Temperature Between High and Low Limits

Pulse Output Queue overflow

Power On Event (power on delay > 0)

OLED BIT

0 1 2 3 4 5 6 7 8 9 A B C D

aa))SSttaatt

uuss AAllaa

rrm EEvveennt RReeggiisstteerr ((RReeaad OOnnllyy

Each active Alarm E the total number of currently active alarm events will be displayed on the first line. A typical display with no active Alarm Events is shown in Figure 32

vent will be indicated on the OLED screen. In addition,

www.GlobalTestSupply.com

)

llrrmmEEvveenntts SSttaatt

uuss: 0

No AAccttiivvee AAllaarrmmss

Figure 32: Alarm

A typical display with two active Alarm Events is shown in Figure 33:

Figure 33: Alarm Events Register (with two active events)

If more than 7 events are displayed, the user can use the joystick UP and DN buttons to scroll through the record of all indicated events. If the event is not latched in the Latch Alarm Event Register, it may appear and disappear from the status screen; it will be indicated as long as the actual event is taking place.

)) MMaa

sskk AAllaarrm EEvvee

Using the Mask Alarm Event Register settings, the user can individually enable (unmask) or disable (mask) each event. The event is enabled if an asterisk appears in the brackets to the right of the event name. If the event is disabled, it will not be processed or indicated in the events status Register even if actual conditions for the event have occurred. By default, the meter is shipped from the factory with only one event active: “8 – Power On Event”. All other events are disabled. A typical display with Mask Alarm Event Register selection is shown in Figure 34.

nnt RReeggiisstteerr ((TTaa

Events Register (with no alarms)

llrrmmEEvveenntts SSttaatt

LLoow FFllooww AAllaarrm

- PPoowweer OOnn EEvveenn

bbuullaar eennttryy

uuss: 2

)

www.GlobalTestSupply.com

AAllaarrm EEvveennttss MMaa

sskk RReegg::

- RRaa

nngge bb//w HH--L [[**]

- Toott##11> LLiimmii

t [

]

- HHii

gghh Teemmp AAllm [ ]

Allaarrmm EEvveennttss LLaattcch RReegg::

2 - Range b/w H-L [*]

3 - Toott

##11> LLiimmii

t [ ]

- HHii

gghh Teemmp AAllm

[ ]

- Toott##22> LLiimmii

- HHii

gghh PPrree

LLoow PPrreesss AAllm

- PPrraannggee bb//w HH--L [

Figure 34: Alarm Events Mask Register

In the example shown in Figure 34, latch features for all except event #2 are disabled. In o rder to change the Mask Alarm Event Register settings, the user should select the desired event using the joystick UP and DN buttons, an d then press the brackets to the right of the selected event. The asterisk indicates that the event is enabled. To disable an event, remove the corresponding asterisk. Use the button to ac cept and save your new Mask Alarm Event Register settings to the meter’s nonvolatile memory.

)) LLaattcch AAllaarrm EEvveennt RReeggiisstteerr ((TTaa

Using the Latch Alarm Event Register settings, the user can individually enable (unmask) or disable (mask) the latch feature for each event. The event is enabled if an asterisk appears in the brackets to the right of the event name. If the event is not latched (indicated by no asterisk), it may appear and disappear from the status screen. It will be indicated as long as the actual event is taking place. By default, the meter is shipped from Dwyer with the latch feature disabled for all events. A typical display with Latch Alarm Event Register selection is shown in Figure 35:

RIGHT

button. The asterisk will appear in (or disappear from) the

bbuullaar eennttryy

t [

sss AAllm [ ]

[

)

] ]

]

ENT

In the Figure 36 example, latch features for all events are disabled except the Range between High and Low. In order to change Latch Alarm Register settings, the user should select the desired event using the joystick UP and DN buttons, then pressing the RIGHT button. The asterisk will appear in or disappear from the brackets to the right of the corresponding event. The asterisk means that the latch feature is enabled.

4 - Toott

##22> LLiimmii

- HHii

gghh PPrree

LLoow PPrreesss AAllm

- PPrraannggee bb//w HH--L [

Figure 35: Alarm Events Latch Register

t [

sss AAllm [ ]

www.GlobalTestSupply.com

[

] ]

]

To disable a latch feature, the corresponding asterisk must be removed.



NOTE:

Any Alarm Events that may have occurred (Event 0 to Event D) are stored in the internal status register. All detected events (if corresponding bit in the latch register is not masked) remain stored until the register is manually reset (by means of the digital communication interface). If register is masked (disabled), the event will be indicated as long as it is active (no latching). The status Alarm Event Register is mapped to the SRAM (volatile memory). In case of power interruption status Event Register

Use the ENT button to accept and save new Latch Alarm Event Register settings in the meter’s nonvolatile memor y.

d) Reset Status Alarm Event Register (Tabular entry)

The

Status Alarm Event Register

Reg”

menu option. A typical display with the

is shown in

Once the “YES” option is selected, the Event Register will be reset, and the following confirmation screen will appear:

Figure 36

. Note that it requires confirmation from the user:

Reset Alrm Events Reg.:

Figure 36: Resetting Alarm Events Register

can be reset by selecting the

Status Alarm Event Register

YES

DO YOU WANT

RESET EVENT REG?

***********************

Event Reg. Has

been reset!

***********************

“Reset Alarm Event

reset screen

Press any Key...

Figure 37: Alarm Event Register Reset Confirmation Screen

the event corresponding bit in the latch

www.GlobalTestSupply.com

will be automatically reset.

, the

CODE

Absolute Pressure over Permissible Range

..44..1155..2 DDiiaaggnn

Thhee

ffoolllloowwiinng aallaarrm eevveennttss aarre

oossttiicc EEvveennttss RReeggiisstteerr

ssuuppppoorrtteedd::

TABLE XX: DIAGNOSTIC EVENTS REGISTER

EVENT NUMBER

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

There are actually three separate registers:

•

aa))SSttaattuuss DDiiaaggnnoossttiicc EEvvee

DIAGNOSTIC EVENTS DESCRI PT I O N

The Status Di read only) The Mask Diagnostic Event Register, which allows the u se r to Ena bl e or Disab le monitoring for a particular event The Latch Diagnostic Event Register, which allows the use r to Ena bl e or Disab le the latch feature for a particular event

CPU Temperature Too High

DP Sensor Initialization Error

AP Sensor Initi al i zation Error

2.5 Vdc Reference Out of Range Flow Out of Permissible Range

Gas Temperature Out of Range

Analog Output Alarm Flag

UART Serial Communicati on Error

Modbus Serial Communication Er ror

EEPROM R/W Error

Auto Zero Failure Flag

AP Tare Failure Flag

DP ADC Counts Invalid

AP ADC Coun ts Invalid

agnostic Event Register, which holds each active ala rm event (this is

nnt RReeggiisstteerr ((RReeaad OOnnllyy

Fatal Error

)

OLED BIT

0 1 2 3 4 5 6 7 8

9 A B C D

Each active Diagnostic Event will be indicated on the OLED scre en. In addition, the total number of currently active events will be displayed on the first line. A typical display with no active Diagnostic Events is shown in Figure 38:

www.GlobalTestSupply.com

DiiaaggEEvveenntts SSttaatt

DiagEvents Mask Reg.:

uuss: 0

No AAccttiivvee EEvveennttss

Figure 38: Diagnostic Events Status Register (no active events)

A typical display with two active Diagnostic events is shown below:

DiiaaggEEvveenntts SSttaatt

- AAuuttoo ZZeerroo FFaaiilluurr

UUAART EERRRROOR

IFigure 39: Diagnostic Events Status Register (two active events)

If more than 7 events are displayed, the user can scroll with the joystick UP

DN buttons to see all indicated events. If the event is not latched in the

and Latch Diagnostic Event Register, it may appear and disappear from the status screen; it will be indicated as long as the actual event is taking place.

bb))MMaasskk DDiiaa

Using the Mask Diagnostic Event Register settings, the user can individually enable (unmask) or disable (mask) each event. The event is enabled if an asterisk appears in the brackets to the right of the event name. If the event is disabled (no asterisk), it will not be processed or indicated in the Events status Register, even if actual conditions for the event have occurred. By default, the meter is shipped from the factory with only one event active: “0 – CPU Temperature Too High”. All other events are disabled. For a typical display with Mask Diagnostic Event Register selection, see Figure 40:

ggnnoossttiicc EEvvee

nnt RReeggiisstteerr ((TTaa

uuss: 2

bbuullaar eennttryy

)

0 – CPU Temp. High [*] 1 – DP EE Init Err [ ] 2 – AP EE Init Err [ ] 3 – VR Out of Range [ ] 4 – Flow OverLimit [ ] 5 – Pres OverLimit [ ] 6 – Temp O verLimit [ ]

Figure 40: Diagnostic Events Mask Register

www.GlobalTestSupply.com

In the example shown above, latch features for all event s except #0 are

DiagEvents Latch Reg.:

6 – Temp OverLimit [ ]

disabled. In order to change Mask Diagnostic Event Register settings, the user houls select the desired event with the joystick UP and DN buttons, then press the RIGHT button. The asterisk will appear in or disappear from the brackets to the right of the selected event. The asterisk indicates that the event is enabled. Use the ENT button to accept and save the new Mask Diagnostic Event Register settings to the meter’s nonvolatile memory.

cc))LLaattcch DDiiaa

Using Latch Diagnostic Event Register settings the user can enable (unmask) or disable (mask) the latch feature individually for each event. An event is enabled (unmasked) when an asterisk appears in the brackets to the right of the corresponding event. When an event is not latched (no asterisk on the display), it may appe ar and disappear from the status screen. It will be indicated as long as the actual even takes place.

By default, the meter is shipped from Dwyer with the latch feature disabled for all events. A typical display with Latch Diagnostic Event Register selection is shown in Figure 41:

ggnnoossttiicc EEvvee

nnt RReeggiisstteerr ((TTaa

bbuullaar eennttryy

)

0 – CPU Temp. High [*] 1 – DP EE Init Err [ ] 2 – AP EE Init Err [ ] 3 – VR Out of Range [ ]

4 – Flow OverLimit [ ]

5 – Pres OverLimit [ ]

IFigure 41: Diagnostic Events Latch Register

In the example shown above, latch features for all but #0 are disabled. In order to change Latch Diagnostic Event Register settings, the user should select the desired event usin g t he j oy sti ck UP and DN buttons, then press the RIGHT button. The asterisk will appear in or disappear from the brackets to the right of the corresponding event name. The asterisk indicates that the event is enabled. To disable an ev ent, the corresponding asterisk must be removed. Use the ENT button to accept and save the new Latch Diagnostic Event Register settings in the meter’s nonvolatile memory.

dd))RReesseet SSttaattuuss DDiiaaggnnoossttiicc EEvvee

The Status Diagnostic Event Register can be reset by selecting the “Reset DiagEvents Reg.” menu option. A typical display with the Status Diagnostic Event Register Reset screen is shown in Figure 42:

nnt RReeggiisstteerr ((TTaa

bbuullaar eennttryy

)

www.GlobalTestSupply.com



NOTE:

Actual content of the ADC Diagnostic screen may vary depending on the model and device configuration. Consult representative

Reset DiagEvents Reg.:

RESET EVENT REG?

Figure 42: Resetting Diagnostic Events Register

When you select the “YES” option, the Event Register will be reset and the following confirmation scre en will appear:

***********************

Figure 43: Confirmation of Diagnostic Events Register Reset

6..4 4..11

5 5..3 SSeenn

ssoorrs AA

DDC RReeaaddiinng ((rreeaad oonnllyy)

YES

DO YOU WANT

Event Reg. Has

been reset!

Press any Key...

Thhiis mmee aannaalloog innppuu A

yyppiiccaal dii

nnu sseelleeccttii

oon pprroovviiddees

tt cciir

ccuuiittry

ssppllaayy wwiitthh AADDC II

Figure 44: Pressure Sensors ADC Diagnostic

rraaw oor aavveerraagge

ttrroouubbllee

sshhoooottii

nng iin tthhe ddiiffffeerreennt ppaarrtts oo

nnppuut CC

oouunnttss ssccrreeeenn iiss sshhoowwn bbeelloow:

DD:: DDPP: AA::-AAPP::--

for more details about ADC troubleshooting.

((filltteerreedd) vvaalluuees oof tthhe AADDC

117711882255 11771188441

117711778866 99770

33997799662 --

339977883355 99770

your factory customer support

www.GlobalTestSupply.com

33997799661

f tthhe ii

nnssttrruummeenn

t ((rr

ccoouunntts

eeaad

ffoor

oonnllyy)).

6..4 4..11



5 5..4 Teem mppeerraattuurree SSeennssoorrs DDiiaaggnn

This menu selection provides raw or average (filtered) ADC counts for gas temperature and pressure sensor temperature readings, which may be useful for Digital Signal Processing (DSP) troubleshooting (read only). A typical display with Temperature ADC Counts is shown in Figure 45:

GGTT:

5522330 227755889

227755994 2266..9988C

PPUU

::11772266 3344..1 C

DDAT

3300..447 3300..441

Figure 45: Temperature Sensors Diagnostics

NOTE:

Actual content of the ADC Di agnostic screen may vary depending on the

model and device configuration. Cons ult your factory technical support representative for more details about ADC troubleshooting.

6..4 4..11

5 5..5 AAnnaalloogg OOuuttppuutt aannd PPOO

((rreeaad oonnllyy)

This menu selection provides information about the meter’s Analog Output settings and DAC counts, as well as Pulse Output (PO) Queue register value, which may be useful for Analog Output and PO circuitry troubleshooting (read only). A typical display with Analog Output and PO Queue values is shown in Figure 46:

QQuueeuue DDiiaaggnnoossttii

oossttiicc

((rreeaad oonnllyy)

AA..OOuutt

ppuutt: 44--2200mmAA DDAAC UUppdd::EEnnaabbllee DDAAC CCoouunnttss: 334488881 PPOO QQuueeuuee:: 00//11000

Figure 46: Analog Output and PO Queue Diagnostic

NOTE:

Actual content of the Analo g Output and PO Queue Diagnostic screen may vary depending on the model, device configuration, and meter operational state. Consult your factory customer support representative for more details about Analog Output and PO troubleshooting.

www.GlobalTestSupply.com

6..4 4..11



NOTE:

Actual content of the Reference Voltage and DSP Diagnostic screen may vary depending on the model state about

5 5..6 RReeffeerreenncce Vooll

DDiiaaggnn

This menu selection provides information about current 2.5Vdc reference voltage value as well as different parameters of the Temperature/Pressure Compensation Algorithm, which may be useful for meter troubleshooting (r ead only). A typical Reference Voltage and DSP Calculation diagnostic screen is shown in Figure 47:

oossttii

c (rreeaadd oonnllyy

ttaagge aannd DDSSP CCaallccuullaattiioon

)

RREEFF::

33111122 22..55008

00..00000011

1144..7788990

229944..22661111 330000..11551 VVMMCCFF:

00..998855557799

Figure 47: Reference Voltage and DSP Calculation Diagnostic

, device configuration, and meter operational

. Consult your factory customer support representative for more details

Reference Voltage and DSP Calculation troubleshooting.

6.5 Multi-Functional Push-Button Operation

The DFM provides the user with a mic small hole on the right side of the instrument (see Figure 48), which can be used to select/start some important actions for the instrument. The micro push-button switch functionality is available on all DFM models in both analog and digital operation mode.

Pressing a switch briefly (< 6 sec) will not cause unwanted actions but will provide the currently selected mode for this instrument’s communication port. The response will be with one of three signals, as indicated below:

1 AMBER flashing - “Communication Port Disabled” 2 AMBER flashing - “RS-232” 3 AMBER flashing - “RS-485”

ro push-button switch accessible via a

www.GlobalTestSupply.com

FIGURE 48: DFM INTERFACE CONNECTORS

AND MULTI-FUNCTION PUSH-BUTTON ACCESS HOLE

See Table XXI on the following page for explanations.

www.GlobalTestSupply.com

TABLE XXI:

LED Indications using the Multi-Function Push-Button During

Normal Running Mode

STATUS LED INDICATION

Amber flashing On/Off every 2 seconds Com. Port Status: 1 – Port disabled 2 – RS-232 3 – RS-485

Amber flashing On/Off every 2 seconds

Green flashing On/Off every 2 seconds

Red constantly On: the user has 14 seconds to select which Totalizer has to be reset or to toggle Communication port mode. The Com. Port toggle sequence is: Disabled  RS-232 RS-232  RS-485 RS-485  Disabled

TIME PUSHED

1-6 seconds

6-12 seconds

12-18 seconds

18-24 seconds

2 seconds until the Green LED turns Off 2 seconds until the Green LED turns Off 2 seconds until the Green LED turns Off 2 seconds until the Green LED turns Off

INSTRUMENT ACTION

Pressing a switch briefly (<6 sec) will not cause unwanted actions from the device but will provide currently selected mode for Communication port, depending on the number of Amber flashing:

1. Communication port disabled

2. RS-232

3. RS-485 Releasing the switch during this time will Reset the instrument. The instrument’s program will be restarted, and all warning and error messages will be cleared. During start-up, the instrument will perform a self-test. Releasing the switch during this time will start the meter flow sensor Auto Zero Calibration.

NOTE: First make sure there is absolutely no flow and the meter has been connected to power for at least 15 minutes.

Releasing the switch during this time will switch the user push-button to Totalizers Reset Mode or Communication Interface Mode Change. The user can start push-button entry during the next 14 seconds, and then can select which Totali zer to reset or perform Communication Interface toggle action based on the number of times the push-button is pressed. When the push-button is pressed, in order to validate the single push, watch the Green LED turn On, and do not release the push button until the Green LED turns Off (approx. 2 seconds). Pressing the push-button once during the 14second window will Reset Totalizer#1. When the push-button is released, the Red LED turns On (ready to be pressed).

Pressing the push-button twice during the 14second window will Reset Totalizer#2. When the push-button is released, the Red LED turns On (ready to be pressed).

Pressing the push-button 3 times during the 14second window will Reset Totalizer#1 and Totalizer#2.

Pressing the push-button 4 times during the 14second window will initiate single toggle action for Communication Interface. Each single toggle action performs the following change: Disabled  RS-232 RS-232  RS-485 RS-485  Disabled

www.GlobalTestSupply.com



NOTE: If the user does not press the Push-Button within a 10-

second timeframe or keep the push

-button pressed for the

required time (approxi m ately 2 seconds or until Green LED turns Off), no action will ta default state and the

CAUTION:

MANDATORY THAT ANY INSTRUMENT BEING RETURNED FOR SERVICE HAS BEEN COMPLETELY PURGED AND NEUTRALIZED OF TOXIC, BACTERIOLOGICALLY INFECTED, CORROSIVE OR RADIOACTIVE CONTENTS.

ke place. Push-Button entry will reset to the Green LED will be turned On.

7 MAINTENANCE

7..11 GGeenneerraal

It is important that be DFM Mass Flow Meter be used only with clean, dry, non-corrosive filtered gases. Liquids may not be metered. Since the restrictor flow element (RFE) consists of small stainless steel channels, it is prone to occlusion due to impediments of large particles or gas crystallization. Other flow passages are also easily obstructed.

Great care, therefore, must be exercised to avoid the introduction of any potential flow impediment. To protect the instrument, we recommend the use of in-line filters: 5µ (DFM-02) or 20µ (DFM-03/05/47). There is no other maintenance required. It is good practice, however, to keep the meter away from vibration, hot corrosive environments, and excessive RF or magnetic interference. We recommend that meters be returned to Dwyer for repair service and calibration (see Section 1.3).

TO PROTECT SERVICING PERSONNEL, IT IS

7..2 2 CCleeaanniinngg

Before attempting any disassembly of the meter for clearning, we recommend inspecting the flow paths by looking into the inlet and outlet ends of the meter for any debris that may be clogging the flow through the instrument. Remove debris as necessary. If the blockage still exists, contact Dwyer to arrange for repair or cleaning service.

CAUTION:

CALIBRATION needed. Dwyer offers cleaning and recalibration options.

DISASSEMBLY MAY COMPROMISE CURRENT

. After

RFE and flow paths cleaning, a recalibration is professional calibration support. Contact Dwyer for

www.GlobalTestSupply.com

8 RECALIBRATION

RS-485

!<Addr>,<Cmd>,Arg1,Arg2,Arg3,Arg4<CR> Example: !11,F<CR>

RS-232

<Cmd>,Arg1,Arg2,ARg3,Arg4<CR> Example: F<CR>

Where:

Start character ** (must only be used for RS-485 option)

Addr

RS-485 device address in the ASCII representation of hexadecimal (00 through FF are valid). ** (must only be used for R-485 option)

Cmd

The one- or two -c haracter command (see examples below)

Arg1 to Arg4

The command arguments (see examples below). Multiple arguments are comma-delimited.

Carriage Return character

The recommended period for recalibration of the DFM flow meter is once annually.

Dwyer Instruments’ Flow Calibration Laboratory offers professional calibration support for Mass Flow Meters using NIST-traceable precision calibrators under strictly controlled conditions. NIST-traceable calibrations are available.

CAUTION:

DFM flow meters can be only calibrated by Dwyer

Instruments' Flow Calibration Laboratory or an Dwyer authorized trained and certified calibration facility.

9 RS-235/RS-485 SOFTWARE INTERFACE COMMANDS

9..11 GGeenneerraal

The standard DFM meter comes with an RS-232 interface; an RS-485 interface is optional. For the RS-232 interface, the start character is ! and two hexadecimal characters for the address must be omitted. The protocol described below allows for communications with the unit using either a custom software program or a “dumb terminal”. All values are sent as print ASCII characters.

For the RS-485 interface, the start character is always ! . The command string is terminated with the equivalent of a carriage return; line feeds are automatically stripped out by the DFM. (See Section 3.3 for information regarding communication parameters and cable connections.)

9.2 Commands Structure

The structure of the command string is as follows:

www.GlobalTestSupply.com

!12,G<CR> Current Gas is #0, calibrated for AIR)

flow is at 50% FS)

!12,90.00,10.00,<CR>



NOTE:

submit the start character with a two-character hexadecimal device address for the RS-232 option.



NOTE:

The default RS-485 address for all units is 11. Never

Several examples of commands are shown below. All assume that the DFM meter has been configured for decimal address 18 (12 hex) on the RS-485 bus:

1. To get currently selected Gas: The DFM will reply:

2. To get current Flow Rate Alarm status: The DFM will reply:

3. To get a mass and volumetric flow reading: The DFM will reply:

4. Set the High and Low Flow Alarm limit to 90% and 10% of Full Scale flow rate: The DFM will reply:

Address 00 is reserved for global addressing. Do not assign the global address to any device. When commands wi th the global address are sent, all devices on the RS-485 bus execute th e comman d but do not reply with an acknowledgement message.

The global address can be used to change RS-485 addre ss for a parti cul ar device without local display and joystick interface with unknown address:

1. Make sure only one device (whose address must be changed) is connected to the RS-485 network.

!12,G:0,AIR<CR> (assuming the

!12,FA,R<CR> !12,FAR:N<CR> (assuming no flow alarm conditions)

!12,F<CR> !12,50.0,50.3<CR> (assuming the mass

2,FA,C,90.0,10.0<CR>

2. Type the memory write command with the global address: !00,MW,118,XX,<CR> where XX, the new hexadecimal address, can be from 01 to FF.

After the new address has been assigned, a device will accept commands with the new address.

www.GlobalTestSupply.com



NOTE:

dress to two or more devices on the same RS the same address are connected to one RS communication collision on the bus will result, leading to communication errors.

Do not assign the same RS-485 ad

-485 bus. If two or more devices with

-485 network, a

www.GlobalTestSupply.com

TABLE XXII:

Dwyer

SOFTWARE INTERFACE COMMANDS

Note: An “*” indicates power up default settings.

An “**”indicates optional feature not available on all models.

<M Value>, <V Value> (Actual

mass and volumetric ﬂ ow in

current mass and volumetric

engineering units)

<M Value> (Actual mass ﬂ ow

in current mass engineering

units)

<V Value> (Actual volumetric

ﬂ ow in current mass

engineering units)

<MF>,<VF>,<Total#1

Value>,<Total#2 Value>,

COMMAND SYNTAX

DFM ASCII

<Gas Temperature>,

<Gas Pressure>,

<Flow Alarm Status>,

<Temp. Alarm Status>,

<Press. Alarm Status>,

<Alarm Events Register>,

Example:

25.4,23.2,354.2,0.0,24.8,

14.95,D,N,D,0x0,0x0

ARGUMENT

(read only)

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

1 F NO

DESCRIPTION No.

ﬂ ow reading in current MEU and VEU

NAME

COMMAND

Flow Requests the current mass and volumetric

ARGUMENT

(read only)

2 FM NO

reading in current MEU

Mass Flow Requests the current mass ﬂ ow

www.GlobalTestSupply.com

ARGUMENT

(read only)

3 FV NO

Requests the current volumetric ﬂ ow

reading in current VEU

Volumetric

Flow

4 PI NO

Read Process Information (PI) parameters:

Process

ARGUMENT

(read only)

Mass Flow Rate (MEU)

Volumetric Flow Rate (VEU)

Totalizer#1 value (MEU)

Totalizer#2 value (MEU)

Gas Temperature (TEU)

Gas Pressure (PEU)

Flow Alarm Status [D,N,H,L]

Information

(PI)

Alarm Events Register (Hex)

Events Register (Hex)

Temp. Alarm Status [D,N,H,L]

Press. Alarm Status [D,N,H,L]

Current status of the

Current status of Diagnostic

Diagnostic Events below.

NOTE: See list of the Alarm and

COMMAND SYNTAX

AE:<Value>

Example: AE:0x0

(read Alarm Events

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

5 AE NO ARGUMENT

AER:0x0

status register)

(reset Alarm Events

AEM:0x1

NO ARGUMENT

(read current

status register to

0x0000)

(Read/Set Alarm

AEM:0x11

settings)

<Value>

Events Mask

0x0000-0x0FFF

Set new value

NOTE: all 6

characters are

required

AEL:0x1

NO ARGUMENT

(read current

settings)

(Read/Set Alarm

Events Latch

AEL:0x11

<Value>

0x0000-0x0FFF

Set new value

NOTE: all 6

characters are

required

DESCRIPTION No.

Read/Set/Reset value of Alarm Events Registers:

Status Register: (Read/Reset)

Mask Register: (R/W)

Latch Register: (R/W)

See list of the Alarm Events below:

0 FLOW_ALARM_HIGH 0x0001

1 FLOW_ALARM_LOW 0x0002

2 FLOW_ALARM_RANGE 0x0004

NAME

COMMAND

Alarm

Events

Registers

www.GlobalTestSupply.com

3 TOTAL1_HIT_LIMIT 0x0008

4 TOTAL2_HIT_LIMIT 0x0010

5 PRES_ALARM_HIGH 0x0020

6 PRES_ALARM_LOW 0x0040

7 PRES_ALARM_RANGE 0x0080

8 TEMP_ALARM_HIGH 0x0100

9 TEMP_ALARM_LOW 0x0200

A TEMP_ALARM_RANGE 0x0400

B PULSE_OUT_QUEUE 0x0800

C PASSWORD_EVENT 0x1000

D POWER_ON_EVENT 0x2000

COMMAND SYNTAX

DE:<Value>

Example: DE:0x0

(read Diagnostic

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

6 DE NO ARGUMENT

DER:0x0

Events status

(reset Diagnostic

DEM:0x1

NO ARGUMENT

(read current

settings)

Events status regis-

ter to 0x0000)

(Read/Set Diag-

nostic Events Mask

DEM:0x101

<Value>

0x0000-0x0FFF

Set new value

NOTE: all 6

DEL:0x1

characters are

required

NO ARGUMENT

(read current

(Read/Set Diag-

DEL:0x101

settings)

<Value>

0x0000-0x0FFF

Set new value

nostic Events Latch

NOTE: all 6

characters are

required

DESCRIPTION No.

Read/Set/Reset current value of the Diagnostic

Events Registers

Status Register: (Read/Reset)

Mask Register: (R/W)

Latch Register: (R/W)

See list of the Diagnostic Events below:

0 CPU_TEMP_HIGH 0x0001

NAME

COMMAND

Diagnostic

Events

Registers

www.GlobalTestSupply.com

1 DP EE INIT ERROR 0x0002

2 AP EE INIT ERROR 0x0004

3 VREF_OUT_OF_RANGE 0x0008

4 FLOW ABOVE LIMIT 0x0010

5 AP OUT OF RANGE 0x0020

6 G TEMP OUT OF RANGE 0x0040

7 ANALOG OUT ALARM 0x0080

8 SER COMM FAILURE 0x0100

9 MB COMM FAILURE 0x0200

A EEPROM FAILURE 0x0400

B AUTOZERO FAILURE 0x0800

C AP TARE FAILURE 0x1000

D DP PRESSURE INVALID 0x2000

E AP PRESSURE INVALID 0x4000

F FATAL_ERROR 0x8000

<T Value> (Actual gas tem-

COMMAND SYNTAX

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

7 GT NO ARGUMENT

perature in current temp.

engineering units)

Example: 24.51

<P Value> (Actual gas pres-

sure in current pressure

engineering units)

Example: 14.66

(read only)

8 GP NO ARGUMENT

Example: G:0,AIR

0 – Gas Index

AIR – Gas name

(read current active

Gas index and Gas

Name)

9 G NO ARGUMENT

Example: G:5,He

5 – Gas Index

He – Gas name

<Value>

[0-128]

Select new Gas

NOTE: Instruments

w/o Corrosive

Gases support only

129 gases [0-128]

DESCRIPTION No.

Requests the Gas Temperature reading

NAME

COMMAND

Read Gas

in current TEU

Temperature

Requests the Gas Pressure reading

Read Gas

NOTE: Instrument conﬁ gured for non-corrosive

gases support indexes 0 to 128 (see list of all

in current PEU

Pressure

Gas Read / Select Active Gas Indexes:

supported gases).

www.GlobalTestSupply.com

COMMAND SYNTAX

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

DI:5,Helium,0.200,

Sml/min,ml/min,E,D,0,1

5 – Gas index 5(Helium)

0.200 – full scale (L/min)

Sml/min – current MEU

ml/min – current VEU

(Read Only)

10 DI NO ARGUMENT

installed (Not Supported)

E – Totalizer#1 Enabled

D – Totalizer#2 Disabled

0 – Analog Output set to 0-5 Vdc

1 – ModBus interface H/W is not

DESCRIPTION No.

NAME

COMMAND

Device Info Read device conﬁ guration info:

- Currently selected Gas (index, name)

- Full scale range (L/min)

- Mass ﬂ ow Units of measure

- Volumetric ﬂ ow Units of Measure

- Totalizer#1 mode

D – Disabled

E – Enabled

- Totalizer#2 mode

D – Disabled

E – Enabled

-Analog Output Mode

0 – 0-5 Vdc

1 – 0-10 Vdc

2 – 4-20 mA

www.GlobalTestSupply.com

-ModBus H/V status [0/1]

0 – Installed

1 – Not Installed

COMMAND SYNTAX

FAC:40.10,20.50

<Value>

(low limit,

<Value>

(high limit,

(set Mass Flow

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

11 FA C

%F.S.)

[0.0 – 109.9]

%F.S.

%F.S.)

[0.1 – 110.0]

%F.S.

Alarm High

and Low limits

parameters)

FAA:<Value>

Example: FAA:5

<Value>

[0-3600]

(Flow Alarm

action delay in

sec.)

FA:E

(enable ﬂ ow

alarm)

FA:D

(disable ﬂ ow

alarm)*

FAR:N (no alarm)

FAR:H (high alarm)

FAR:L (low alarm)

FAS:M,Hv,Lv,A,L,P

(Read current

status)

Example:

FAS:E,40.00,20.00,2,0,8

FAP:<Value>

Example: FAP:60

<Value>

[0-3600]

(Read current

settings)

(Flow Alarm

Power Up delay

in sec.)

FAL:<Value>

where:

Value = 0 – 1

<Value>

(0-disabled*)

(1-enabled)

(Latch mode)

Example: FAL:0

DESCRIPTION No.

ﬂ ow alarms.

Note: High alarm value has to be more

than Low alarm value.

Meter Flow Alarm conditions:

Flow  High Limit = H

NAME

COMMAND

Flow Alarms Sets / reads the parameters of the mass

www.GlobalTestSupply.com

Flow  Low Limit = L

Low < Flow < High = N

Alarm Settings Reply parameters:

M – mode (E/D)

Hv – High settings value

Lv – Low settings value

A – Action Delay (sec)

L – Latch mode (0-1)

P – Power Up delay (sec)

COMMAND SYNTAX

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

TAC:333.25,263.15

<Value>

(low limit,

Kelvin)

[253.15°K –

343.14°K]

<Value>

(high limit, Kelvin.)

[253.16 °K –

343.15 °K]

(set Temp Alarm

High and Low limits

parameters)

12 TA C

TAA:<Value>

Example: TAA:5

TA:E

<Value>

[0-3600]

(Temp Alarm action

delay in sec.)

(enable Temp Alarm)

TA:D

(disable temp alarm)*

TAR:L (low alarm)

R (read current status) TAR:H (high alarm)

TAP:<Value>

TAS:M,Hv,Lv,A,L,P

Example:

(Read current set-

Example: TAP:60

TAS:E,333.25,263.15,2,0,10

<Value>

[0-3600]

tings)

(Temp Alarm Power

Up delay in sec.)

TAL:<Value>

where:

Value = 0 – 1

Example:

<Value>

(0-disabled*)

(1-enabled)

(Latch mode)

TAL:0

DESCRIPTION No.

Sets / reads the parameters of the

temperature alarms.

Note: High alarm value has to be

more than Low alarm value.

NAME

COMMAND

Temperature

Alarms

www.GlobalTestSupply.com

Meter Temperature Alarm conditions:

Temp.  High Limit = H

Temp.  Low Limit = L

Low < Temp. < High = N

Alarm Settings Reply parameters:

M – mode (E/D)

Hv – High settings value

Lv – Low settings value

A – Action Delay (sec)

L – Latch mode (0-1)

P – Power Up delay (sec)

COMMAND SYNTAX

PAC:60.00,10.00

<Value>

(low limit, PSIA)

<Value>

(high limit, PSIA)

(set Press. Alarm

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

13 PA C

PAA:<Value>

Example: PAA:5

[0.0 –90.99]

PSIA

[0.1 –100.00]

PSIA

<Value>

[0-3600]

High and Low limits

parameters)

(Press. Alarm action

delay in sec.)

PA:E

(enable Press.

Alarm)

PA:D

(disable Press.

Alarm)*

PAR:N (no alarm)

PAR:H (high alarm)

PAR:L (low alarm)

PAS:M,Hv,Lv,A,L,P

Example:

(read current status)

(Read current

PAS:E,60.00,10.00,2,0,5

PAP:<Value>

Example: PAP:60

PAL:<Value>

where:

<Value>

[0-3600]

<Value>

(0-disabled*)

settings)

(Pres. Alarm Power

Up delay in sec.)

(Latch mode)

Value = 0 – 1

Example:

PAL:0

(1-enabled)

DESCRIPTION No.

Sets / reads the parameters of the

pressure alarms.

Note: High alarm value has to be

more than Low alarm value.

NAME

COMMAND

Pressure

Alarms

www.GlobalTestSupply.com

Meter Pressure Alarm conditions:

Press..  High Limit = H

Press..  Low Limit = L

Low < Press. < High = N

Alarm Settings Reply parameters:

M – mode (E/D)

Hv – High settings value

Lv – Low settings value

A – Action Delay (sec)

L – Latch mode (0-1)

P – Power Up delay (sec)

COMMAND SYNTAX

FL R:FL

FH R:FH

FR R:FR

PL R:PL

PH R:PH

PR R:PR

TL R:TL

TH R:TH

TR R:TR

T1 R:T1

T2 R:T2

PO R:PO

R:D

AE R:AE

DE R:DE

M R:MS (read current

settings)

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

14 R D R:D

DESCRIPTION No.

Read / Set SSR Relay

Assignment

NAME

COMMAND

Relay

Assignment

D - no action (SSR disabled*)

FL - Low ﬂ ow alarm

FH - High ﬂ ow alarm

FR - Range between High &

Low ﬂ ow alarms

PL - Low pressure alarm

PH - High pressure alarm

PR - Range between High &

Low pressure alarms

TL - Low temperature alarm

TH - High temperature alarm

TR - Range between High &

Low temperature alarms

T1 - Tot#1 reading > limit

T2 - Tot#2 reading > limit

www.GlobalTestSupply.com

PO - Pulse Output

AE - Alarm Events

DE - Diagnostic Events

M - Manual On (energized)

closed.

the normally open contact is

NOTE: when SSR is energized,

COMMAND SYNTAX

T1Z or T2Z

(Reset to zero)

2 (Totalizer #2)

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

15 T 1 (Totalizer #1)

T1C:2.5, 0.0 (limit not required)

T2C:2.0,20580.5

T1:D or T2:D

T1:E or T2:E

<value> (Limit

volume in current

volume based EU)

<value> (start totalizer

at ﬂ ow)

%FS [0.0 – 100.0]

C –

Start ﬂ ow and Event

Condition

P – Power On Delay <value> (0-3600 sec.) T1P:10 or T2P:20

(disable totalizer)*

(enable totalizer)

T1R:<value> or

T2R:<value>

(in current EU)

T1S:Mode,StartFlow,LimitVolume,

PowOnDelay, AutoResetMode,

AutoResetDelay

(read current totalizer

volume reading)

(read current

settings status)

Example: T1S:E,0.5, 2045.2,10,0,5

T1A:0 - disabled

Or T2A:1 - enabled

T1I:2 Or T2I:0

T1B or T2B

<value> [0-1]

0 – Disable 1 – Enable

<value>

[0-3600 sec.]

Set Auto Reset mode

Set Auto Reset Interval delay

Restore Totalizer

value from EE backup

T1L:0 or T2L:0

T1L:1 or T2L:1

No Argument

(read Lock status)

<value> [0-1]

Set Lock mode

0 - Unlock 1 - Lock

Totalizer Lock status

read / set

DESCRIPTION No.

the ﬂ ow Totalizers.

NAME

COMMAND

Totalizers Sets and controls action of

NOTE:

Start totalizer at Flow value has to

be entered in %FS (0.0 – 100.0)

Limit volume has to be entered in

currently selected mass EU

If Totalizer hit limit event is not

required, set “Limit Volume”

value (argument 4) to zero.

Totalizers support Count

Up mode only.

If Auto Reset mode is Enabled the

Totalizer volume will be reset to

www.GlobalTestSupply.com

zero as soon as Totalizer reading

reaches “Limit Volume” value.

Totalizers reading are stored in

EEPROM (non volatile) memory. Power

cycle will not affect Totalizers reading.

In addition Totalizers reading are

backed up in separate EEPROM

partition with 6 minutes interval. In

case of error Totalizers reading may

be restored from backup location.

Totalizers cannot be reset if Reset

Lock parameter value set to 1.

COMMAND SYNTAX

AOM:<Value>

Example:

(Returns Current

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

16 AO M No Argument

AOM:0

AOM:<Value>

Example:

AOM:1

Analog Output mode

settings)

<Value>[0-2]

Set new Analog

Output mode settings

AOS:N

(Returns Current

Analog Output alarm

status)

S No Argument

DESCRIPTION No.

Sets / Reads Meter Analog Output set-

tings and alarm status.

Device Analog Output mode: Settings:

0 – 0-5 Vdc

1 – 0-10 Vdc

2 – 4-20 mA

NAME

COMMAND

Analog

Output

www.GlobalTestSupply.com

Device Analog Output alarm status:

N – No Alarm (normal operation)

Y – Alarm is On (abnormal conditions

are detected)

COMMAND SYNTAX

PU:<value>

Example:

PU:10

<Value>

(Unit/Pulse)

PT:<value>

In current E.U.

(example:

10 litr/pulse)

<value>

Example: PT:100

[25-3276 ms]

P:D

P:E

val

ime Inter

PS:Mode,FlowStart, Unit

PQ:<value>

(number of pulses in Queue)

PF:1.0

<value>

Pulse, PulseT

(0.0–100.0%FS)

Example:

PS:E,1.0,1.666,100

Set Units Per Pulse

Parameter.

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

17 P U

DESCRIPTION No.

programmable Pulse Output circuitry.

NOTE:

Unit/Pulse value has to be entered

NAME

COMMAND

Pulse Output Sets and controls action of the

Set Pulse active Time

in ms

(disable pulse

output)*

(enable pulse output)

(read current pulse

output Queue value)

Set Flow Start value

in currently selected EU.

EU has to be not time based

It is recommended to set the unit/pulse

value equal to the meter maximum

ﬂ ow in the same units per second

equivalent. This will limit the pulse to

no faster than one pulse every second.

Example:

Maximum ﬂ ow rate:

600 liter/min (600 liter/min = 10 liters

per second)

If Unit/Pulse is set to 10 liters per

pulse, the output will pulse once every

second (F=1 Hz).

www.GlobalTestSupply.com

(read setting status)

Pulse active time in ms has to be at

least twice less than pulse period (1/F).

In this example any value between 50

and 500 ms will be acceptable.

COMMAND SYNTAX

Example:

S:< mode value >

S:0

Example:

S:<mode value>

Set new Status LED

<mode value> [0-5]

Status LED mode)

(Returns Current

S:1

%FS* U: %FS

mode value

Sml/min U: SmL/min

Sml/sec U: SmL/sec

SuL/min U: SuL/min

SL/min U: SL/min

SL/sec U: SL/sec

Sml/hr U: SmL/hr

SL/day U: SL/day

SL/hr U: SL/hr

Sm3/day U: Sm3/day

Sm3/hr U: Sm3/hr

Sm3/min U: Sm3/min

Sf3/hr U:Sf3/hr

Sf3/min U:Sf3/min

Sf3/sec U:Sf3/sec

gr/min U: gr/min

gr/sec U: gr/sec

Sf3/day U:Sf3/day

gr/day U: gr/day

gr/hr U: gr/hr

kg/day U: kg/day

kg/hr U: kg/hr

kg/min U: kg/min

lb/min U: lb/min

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

18 S No Argument

DESCRIPTION No.

2 – Alarm Events only

1 – F. Alarm & Totalizers only

0 – Normal

mode:

NAME

COMMAND

Status LED Read and set current Status LED

19 U

2 – hours

1 – minutes

0 – seconds

Time base argument:

sion value to L/min.

k-Factor value represents conver-

For user deﬁ ned units:

per unit time.

output are mass ﬂ ow units and not

Note: The units of the totalizer

rate and totalizer reading.

Set units of measure for mass ﬂ ow

5 – ModBus interface events

4 – UART interface events

3 – Diagnostic Events

measure

Units of

Mass Flow

www.GlobalTestSupply.com

1 – use density

Density argument:

3 – days

0 – do not use density

COMMAND SYNTAX

U:USER

U:user, K-Factor,

TimeBase,UseDensity

[0 or 1]

0-second

No Argument

Set previously deﬁ ned USER unit

<k-factor value>

[>0.0]

Example:

U:USER,1.5,1,0

U:<EU name>

0 – No

1 – Yes

1-Minute

2-Hour

3-Day

Example: U:SmL/min

lb/hr U: lb/hr

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

DESCRIPTION No.

NAME

COMMAND

lb/day U: lb/day

oz/sec U: oz/sec

oz/min U: oz/min

NuL/min U: NuL/min

Nml/sec U: NmL/sec

Nml/min U: NmL/min

Nml/hr U: NmL/hr

NL/sec U: NL/sec

NL/min U: NL/min

NL/hr U: NL/hr

NL/day U: NL/day

Nm3/min U: Nm3/min

Nm3/hr U: Nm3/hr

Nm3/day U: Nm3/day

Nf3/sec U:Nf3/sec

Nf3/min U:Nf3/min

Nf3/hr U:Nf3/hr

Nf3/day U:Nf3/day

USER

www.GlobalTestSupply.com

(user deﬁ ned)

USER

(user deﬁ ned)

Change parameters of the user

deﬁ ned unit

No Argument (status)

Returns currently selected units.

COMMAND SYNTAX

%FS* VU: %FS

uL/min VU: uL/min

ml/sec VU: mL/sec

ml/min VU: mL/min

ml/hr VU: mL/hr

L/sec VU: L/sec

L/min VU: L/min

L/hr VU: L/hr

L/day VU: L/day

m3/min VU: m3/min

m3/hr VU: m3/hr

m3/day VU: m3/day

f3/sec VU: f3/sec

VU: mL/min

f3/min VU: f3/min

f3/hr VU: f3/hr

f3/day VU: f3/day

No Argument (status)

CS:<Tvalue>,<Pvalue>

Example: S:70.0,14.696

CS:<Tvalue>,<Pvalue>

Example: S:70.0,14.696

CT:<value>

Example: CT:1024.2

CT:Z

<Pres. Value>

[PSIA]

[F]

No Argument (Returns

Current STP values)

No Argument (read

timer)

Reset Timer

Returns currently selected units

Read/Set Units Standard

Conditions Temp [F],

Pressure [PSIA]

Read/Reset Meter main

Calibration / Maintenance Timer

CN:<Tvalue>,<Pvalue>

Example: N:32.0,14.696

CN:<Tvalue>,<Pvalue>

Example: N:32.0,14.696

<Pres. Value>

[PSIA]

[F]

No Argument (Returns

Current STP values)

No Argument CP:148.7

Read/Set Units Normal

Conditions Temp [F],

Pressure [PSIA]

Read Time elapsed from

Meter Power Up in hours

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

20 VU

DESCRIPTION No.

Set units of

NAME

COMMAND

Volumetric

measure for

volumetric ﬂ ow rate

Flow Units of

measure

Sets/Reads Calibration related

parameters.

NOTE: Factory set Standard

conditions: 70.00 "F and 14.6959

Calibration

Settings

www.GlobalTestSupply.com

PSIA

NOTE: Factory set Normal

conditions: 32.00 °F and 14.6959 PSIA

Hours since last time unit was

calibrated.

NOTE: has to be reset to zero after

calibration.

Power Up pilot timer will be set to

zero each time power is removed

or meter is reset.

COMMAND SYNTAX

SCM:<value>

Example: SCM:E

SCM:<value>

Example: SCM:E

SCR:<value>

Example: SCR:1

SCR:<value>

Example: SCR:1

[E/D]

No Argument (Returns

current Mode)

[1-255]

No Argument (Returns

current setting value)

Read/Change Device Flow Sig-

nal Conditioner NLES mode

E – Enabled*

D – Disabled (No Conditioning)

Flow Running Average Damping

[1-255] samples

1 – Disabled*

Example:

SCA:0.20,0.80

<a1_value>

[0.01- 0.99]

<a0_value>

[0.01- 0.99]

No Argument

(Returns Current

AP Sensor Compensated signal

conditioning NLES A0 and A1

parameters (do not change

SCF:4

SCF:<value>

settings values)

<new value> [1-255] SCF:<value>Example:

No Argument (Returns

factory default settings unless

instructed by tech support)

AP Sensor Running Average

Damping [1-255] samples

Example: SCF:4

Example:

SCP:E

Example: SCP:E

SCD:<value>

<D1_value>

Current settings values)

No Argument (Returns

Current settings values)

[E/D]

<D0_value>

1 – Disabled*

Read/Change Device AP Signal

Conditioner NLES mode

E – Enabled*

D – Disabled

Example: SCD:0.20,0.80

SCD:<value>

Example: SCD:0.20,0.80

[0.01- 0.99]

No Argument

(Returns Current

AP Sensor Compensated signal

conditioning NLES D0 and D1

parameters (do not change

SCT:10

SCT:<value>

Example: SCT:10

settings values)

<new value> [1-255] SCT:<value>Example:

No Argument (Returns

current setting value)

factory default settings unless

instructed by tech support)

Temp Running Average Damp-

ing [1-255]

1 – Disabled

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

22 SC

DESCRIPTION No.

Sets/Reads meter Signal

Conditioner Parameters

NAME

COMMAND

Signal

Conditioner

Settings

NOTE: The signal conditioner param-

eters were set on the factory to keep

best performance. Do not change

Signal Conditioner parameters un-

less instructed by factory technical

support representative!

NOTE: NLES parameter a1 must be

more than a0. Similar NLES

parameter D1 must be more than D0.

www.GlobalTestSupply.com

COMMAND SYNTAX

LC:<value>

Example: LM:S

LM:<value>

Example: LM:S

LM:<value>

(Returns Current settings)

No Argument

S or D

D - Dynamic

S - Static

LCD Process Screen Mode:

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

23 L

Example: LO:900

LO:<value>

LB:127

Example: LB:127

LB:<value>

Example: LC:6

[1-36000]

No Argument LB:<value> Example:

[1-255]

No Argument LC:<value> Example: LC:6

[1-128]

OLED Screen Saver Time

Level: [1-255]

OLED operational Brightness

ness Level: [1-128]

OLED Screen Saver Bright-

Example: LP:2

LP:<value>

Example: LP:2

LP:<value>

(Returns Current settings)

No Argument

[0 - 3]

No Argument LO:<value> Ex.: LO:900

3 – OLED off

2 – Vertical Scrolling mode

1 – Low Brightness mode

0 – Screen Saver Disabled

OLED Screen Saver Mode

[1-36000] seconds

Delay before activation:

enabled: 0x01 and 0x02)

(only ﬁ rst two screens are

Example: LS:0x03

ExampleLT:5

Current settings)

No Argument (Returns

No Argument LT:<value> Example:T:5

Mask register

OLED Process Screens

Interval in sec. (for dynamic mode)

OLED Process Screen Time

ExampleLD:1

LD:<value>

ExampleLD:1

LD:<value>

(all 6 screens are enabled)

Example: LS:0x3F

Current settings)

No Argument (Returns

[0-1]

characters are required)

0x0001–0x003F ( all 6

<Value>

1 – Elevated (+1)

point precision: 0 - Normal

OLED Flow Reading decimal

DESCRIPTION No.

parameters**.

Sets/Reads OLED related

NAME

COMMAND

Screens

Process

OLED and

0x20 – Meter Troubleshooting

0x10 – Meter Status Info

0x08 – Meter Conﬁ guration Info

0x04 – M Flow Rate / V Flow Rate

0x02 – M Flow Rate / Totalizer#2

0x01 – M Flow Rate / Totalizer#1

below:

See list of the Process Screens

Clear bit – Disable Screen

Set bit – Enable Screen

0x00FF – screen mask (8 bits wide).

Process Screens Mask register:

Argument 1 = S

Settings**

www.GlobalTestSupply.com

current settings.

submitted, command returns

When Argument #2 is not

N – Display is not Installed

Y – Display Installed

arguments will return OLED status:

“L” command without any

disabled.

NOTE: Screen #1 (0x01) cannot be

COMMAND SYNTAX

LA:<value>

Example: LA:1

[0-25] samples

OLED Flow Running Average

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

LA:<value>

Example: LA:1

LE:<value>

Example: LE:0.01

LE:<value>

Example: LE:0.01

L:Y

No Argument

(Returns Current settings)

[0.0-0.99] %FS

No Argument

(Returns Current settings)

[0-25]

OLED Flow reading Dead

Band in % F.S. [0.0 - 0.99]

No Argument Returns OLED

Example: ZV,589

NOTE: For proper result

meter has to be connected

No Argument ZV:< Value>

No Argument ZN

support status: Y or N

Display current Zero Value

Start Sensor Auto Zero

calibration now.

NOTE: make sure absolutely

24 Z

to power for at least 15

minutes prior to Auto Zero

calibration

Ex: ZS:7492,70581,N

APZ:<OffsetValue>,<ADC

value>,<TempCounts>,<A

No Argument ZS: <T value>,<ADC value>,

No Argument

(Returns Current settings

no ﬂ ow through the meter!

Display Flow Auto Zero

Status

Absolute Pressure Sensor

Zstatus>

Example: APZ:-0.0266,-

640002,839,N

ZA:<value>

Example: ZA.

and status)

[13.1 – 15.99] PSIA

Tare request and status

NOTE: make sure absolutely

no ﬂ ow through the meter!

New AP Value must be taken

from reference AP standard!

DESCRIPTION No.

NAME

COMMAND

parameters

WARNING: make sure absolutely no

ﬂ ow through the meter during Sensor

Zero offset calibration!

NOTE: For proper result meter has to

be connected to power for at least 15

minutes prior to Auto Zero calibration.

Auto Zero Status return parameters:

<T value> - Current Tare value

<ADC value> - Current ADC value

AZ Status:

Auto Zero Sets/Reads Meter Auto Zero related

www.GlobalTestSupply.com

N – Auto Zero Not Started

I – Auto Zero In Process

F – Auto Zero Failed

D – Auto Zero is Done (Success)

WARNING: make sure meter is open to

atmosphere and absolutely no ﬂ ow

through the meter during AP Sensor

tare procedure! New AP Value must be

taken from reference AP standard in PSIA!

COMMAND SYNTAX

barA PU: barA

psiA PU:PSIA

kPaA PU: kPaA

hPaA PU: hPaA

mbarA PU: mbarA

g/cm2A PU: g/cm2A

atm PU: atm

MPaA PU: MPaA

mmHgA PU: mmHgA

inHgA PU: nHgA

kg/cmA PU: kg/cmA

%FS PU: %FS

TorrA PU: TorrA

inH2OA PU: inH2OA

cmH2OA PU: cmH2OA

PU:PSIA

R TU:R

K TU:K

C TU:C

F TU:F

(Return Current settings)

No Argument

TU:F

(Return Current settings)

No Argument

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

25 PU

DESCRIPTION No.

pressure sensor full scale range.

%FS units relative to the absolute

Measure

Sets/Reads Pressure Units of

NAME

COMMAND

Measure

Units of

Pressure

26 TU

Measure

Sets/Reads Temperature Units of

Measure

Units of

Temperature

www.GlobalTestSupply.com

COMMAND SYNTAX

Command Argument 1 Argument 2 Argument 3 Argument 4 Response

MBB:<Baud Rate

Value>Example:

MBB:9600

No Argument

(Return Current

settings)

<Baud Rate

Value >

ModBus interface baud

rate parameter:1200,

2400,4800,9600*,19200,

38400,57600,115200

27 MB

MBP:<Parity Value>

Example: MBP:0

No Argument

(Return Current

settings)

<Parity Value > MBP:0

ModBus interface Parity:

0 – None*

1 – ODD

2 – EVEN

MBS:<Stop Bits Value>

Example: MBS:2

MBA:<Adress Value>

No Argument

(Return Current

settings)

<Stop Bit Value> MBS:2

No Argument

ModBus interface Stop

Bits: [1 or 2*]

Example:MBA:11

MBD: MgCtr,SRSErrCtr,

aveMsgCtr,ORErrCtr

Example:MBD:1,0,0,0

(Return Current

settings

<AddressValue> MBA:11

No Argument

(Return Current

settings

ModBus slave device

address: [1-247]

Factory default address:11

Diagnostic of ModBus state

machine communication

counters

MBR:Done

No Argument

(Reports command

receiving)

Reset ModBus

communication Port and

<Value> Command:

ModBus state machine.

0 to 413 (EEPROM

Memory Index)

115 to 413

28 MR

29 MW

MW,XXX,<Value>

where: XXX= EEPROM

Index

Reply: Example:

MW,101.3

(EEPROM Memory

Index) NOTE: EEPROM

indexes 0-114 are read

only!

DESCRIPTION No.

– Message Counter

Sets/Reads meter ModBus Communication

settings and address (optional)**

Diagnostic Command (argument D) returns following

parameters:

MsgCtr

SRSErrCtr – CRC Error Counter

SlaveMsgCtr – Slave Message Counter

ORErrCtr – Overrun Error Counter

NAME

COMMAND

ModBus **

Communication

settings and

address

(optional)

www.GlobalTestSupply.com

Reads the value in the speciﬁ ed EEPROM memory

location.

Writes the speciﬁ ed value to the speciﬁ ed memory location.

WARNING: Use Carefully, can cause unit to malfunction.

(Note: Some addresses are write protected!)

WARNING: The meter EEPROM parameters were set on

the factory to keep best performance. Do not change

Read EEPROM

Memory

Write

EEPROM

Memory

EEPROM parameters unless instructed by factory

technical support representative!

UART Error Codes:

Code Event Description

Bit position

0 FLOW_ALARM_HIGH

0x0001

1 FLOW_ALARM_LOW

0x0002

2 FLOW_ALARM_RANGE

0x0004

3 TOTAL1_HIT_LIMIT

0x0008

4 TOTAL2_HIT_LIMIT

0x0010

5 PRES_ALARM_HIGH

0x0020

6 PRES_ALARM_LOW

0x0040

7 PRES_ALARM_RANGE

0x0080

8 TEMP_ALARM_HIGH

0x0100

9 TEMP_ALARM_LOW

0x0200

A TEMP_ALARM_RANGE

0x0400

B PULSE_OUT_QUEUE

0x0800

C PASSWORD_EVENT

0x1000

D POWER_ON_EVENT

0x2000

Code Event Description

Bit position

0 CPU_TEMP_HIGH

0x0001

1 DP EE INIT ERROR

0x0002

2 AP EE INIT ERROR

0x0004

3 VREF_OUT_OF_RANGE

0x0008

4 FLOW ABOVE LIMIT

0x0010

5 AP OUT OF RANGE

0x0020

6 G TEMP OUT OF RANGE

0x0040

7 ANALOG OUT ALARM

0x0080

8 SER COMM FAILURE

0x0100

9 MB COMM FAILURE

0x0200

A EEPROM FAILURE

0x0400

B AUTOZERO FAILURE

0x0800

C AP TARE FAILURE

0x1000

D DP PRESSURE INVALID

0x2000

E AP PRESSURE INVALID

0x4000

F FATAL_ERROR

0x8000

1 – Command Not Supported or Back Door is not enab led . 2 – Wrong# of Arguments 3 – Address is Out of Range (MR or MW commands) 4 – Wrong# of the characters in the Argument 5 – Attempt to alter Write-Protected Area in the EEPROM 6 – Proper Command or Argument not found 7 – Wrong value of the Argument 8 – Dwyer-specific information EE access KEY (wrong key or key is disabled)

Alarm Events codes and bit position:

Diagnostic Events codes and bit position:

www.GlobalTestSupply.com

No zero reading, with no flow condition.

Flow Tare procedure was not performed properly.

Stat us LED indicator and OLED Display remain unit is powered up. No response when flow is introduced from analog outputs 0

Power supply is bad or polarity is reversed.

Measure voltage on pins 7 (+) and 8 ( connector. If voltage specified range, then replace power supply with a new one. If polarity is reversed (reading is negative) connection.

PC board is defective.

OLED Display re analog output 0 fluctuate range during flow measurement.

Output 0-5Vdc signal (pins 6 [ connector) is shorted on the GND or overloaded.

Check external connections to pin 6 connector. Make sure the load

resistance is more than 3000 Ω.

0 0

TTRR

OOUUBBLLEESS

0 0..1 CCoommmmoonn

H H

OOOO

TTII

N N

CCoonnddiittiioonnss

Your DFM Mass Flow Meter was thoroughly checked at numerous quality control points during and after manufacturing and assembly operations. It was calibrated according to your desired flow and pressure conditions for a given gas or mixture of gases.

It was carefully packed to prevent damage during shipment. Should y ou feel that the instrument is not functioning properly, please check first for these common conditions:

• Are all cables connected correctly?

• Are there any leaks in the installation?

• Is the power supply correctly selected according to

requirements? When several meters are used, a power supply with appropriate current rating should be selected.

• Were the connector pinouts matched properly?

• When interchanging with other manufacturers’ equipment,

cables and connectors must be carefully wired for correct pin configurations. Check these.

• Is the pressure differential across the instrument sufficient?

Also check the Troubleshooting Guide provided in Section 10.2.

100..2 Trroouubblleesshhoooottiinngg GGuuiidde

TABLE XXIII: TROUBLESHOOTING GUIDE

NO.

INDICATION

blank when

-5Vdc or 4-20 mA.

ading and/or

-5Vdc signal s in wide

LIKELY REASON

-] of the MiniDIN

[+] and 4

SOLUTION

Perform Auto Zero Procedure (see section

6.4.14 "Sensor Zero Calibration").

-) of the 8-pin MinDIN

, make correct

Return DFM to factory for repair.

(+) and 4 (-), of the MiniDIN

www.GlobalTestSupply.com

is out of

Dwyer Instruments DFM-39010-V-ALA2, DFM-32010-V-ALA2, DFM-43010-V-ALA2, DFM-37010-V-ALA2, DFM-48010-V-ALA2 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Inspect Package for External Damage

Unpack the Mass Flow Meter

Returning Material for Repair

Primary Gas Connections

ELECTRICAL CONNECTIONS

Power Supply Connections

Output Signals Connections

Digital Communication Interface Connections

6.4.7 Submenu “User-Defined Mixture”

Submenu “Gas Pressure Alarm”

6.5 Multi-Functional Push-Button Operation

7 MAINTENANCE

8 RECALIBRATION

9 RS-235/RS-485 SOFTWARE INTERFACE COMMANDS

9.2 Commands Structure