Meriam M2110F User Manual

9R142 Dated 2/1/11

The Battery model is powered by its internal lithium batteries. This model does not provide any outputs or RS-232 communications.

SetPoint and Current Loop models have outputs that can be used for control or indicating functions. Both models also have RS-232 communications capability. In addition to configuring the gauge, the RS-232 port can be used to monitor and log the measured flow data and output status. It can also be used as part of a control system with digital capabilities.

The SetPoint model provides two relay outputs. These relays can be connected in normally open or normally closed configurations for fail-safe operation. SetPoint detection can be set from 0 to +120% of the full scale flow range and is powered by 115VAC, 230 VAC, or 24VDC.

The Current Loop model provides a 4 to 20 mA output, and is intended to be used as a flow transmitter on a three or four wire loop. Zero and span are set through user-programmable registers, from 0 to +120% of the full scale flow range. The Current Loop model is powered by 24VDC only.

M2110F SMART FLOW GAUGE

OPERATING INSTRUCTIONS

Meriam’s M2110F Smart Flow Gauge is a microprocessor-based pressure sensing device with algorithms to calculate flow. The gauge provides laminar flow element, Accutube and Orifice Plate flow measurements. Three configurations are available: Battery, SetPoint, and Current Loop models.

All models are programmable through the front keypad. The user’s program information is stored in non-volatile memory, and is retained when the power to the gauge is removed. SetPoint and Current Loop models can also be programmed through the RS-232 serial communication connection.

Table of Contents

1 OVERVIEW.......................................................................................................................................................4

1.1 FEATURES ...................................................................................................................................................4

1.2 MODELS ......................................................................................................................................................4

1.3 FLOW CALCULATION MODEL......................................................................................................................4

1.3.1 Laminar Flow element...........................................................................................................................4

1.3.2 Accutube or Orifice Plate element.........................................................................................................4

2 SAFETY WARNINGS.......................................................................................................................................5

3 CERTIFICATION / SAFETY / WARNINGS.................................................................................................6

4 FRONT PANEL.................................................................................................................................................7

4.1 FLOW METER DISPLAY .........................................................................................................................7

4.1.1 Indicators...............................................................................................................................................7

4.1.2 Display Refresh Rate ............................................................................................................................. 8

4.1.3 Display Resolution.................................................................................................................................8

4.2 KEYPAD OPERATIONS ..........................................................................................................................8

4.2.1 ON/OFF or BACKSPACE.....................................................................................................................8

4.2.2 ENGINEERING UNITS or UP ARROW...............................................................................................9

4.2.3 BACKLIGHT or DOWN ARROW..........................................................................................................9

4.2.4 PRGM or ENTER ................................................................................................................................10

4.2.5 ZERO FUNCTION...............................................................................................................................10

5 PROGRAMMING...........................................................................................................................................11

5.1 PROGRAMMABLE REGISTER LIST ...................................................................................................12

6 STARTUP REQUIREMENTS.......................................................................................................................13

6.1 POWER-UP SEQUENCE...............................................................................................................................13

6.2 POWER-UP ERROR CONDITIONS................................................................................................................13

6.2.1 Register Range Errors.........................................................................................................................13

6.2.2 Non-Register Data errors....................................................................................................................13

6.3 MEASUREMENT MODEL ............................................................................................................................13

6.4 LOW FLOW CUTOFF..................................................................................................................................14

6.5 B COEFFICIENT/FLOW CONSTANT.............................................................................................................14

6.6 C COEFFICIENT.......................................................................................................................................... 14

6.7 ZERO FLOW REFERENCE ...........................................................................................................................14

7 ZERO REFERENCE.......................................................................................................................................14

7.1 AFFECT ON OUTPUTS..........................................................................................................................14

7.1.1 RE-ZEROING THE GAUGE / OUTPUTS DISABLED (P5= 0): .........................................................14

7.1.2 RE-ZEROING THE GAUGE / OUTPUTS ENABLED (P5=1, 2 or 3):...............................................15

7.2 FACTORY ZERO....................................................................................................................................15

7.3 RANGE CHECK......................................................................................................................................15

8 ENGINEERING UNITS..................................................................................................................................16

8.1 CHANGING ENGINEERING UNITS.....................................................................................................16

9 PROGRAMMABLE REGISTERS................................................................................................................17

9.1 P0 – LOCKOUT CODE............................................................................................................................17

9.2 P1 – SHUTOFF TIMER...........................................................................................................................17

9.3 P2- DISPLAY DAMP RATE...................................................................................................................18

9.4 P3 – MEASUREMENT MODEL.............................................................................................................18

9.5 P4 – LOW FLOW CUTOFF..................................................................................................................... 19

9.6 P5 – SETPOINT OPTIONS......................................................................................................................20

9.7 P6 AND P7 – SETPOINT (SET1 AND SET2).............................................................................................20

9.7.1 Setpoint Model.....................................................................................................................................20

9.7.2 Current Loop Model............................................................................................................................20

9.7.3 Data Entry ...........................................................................................................................................21

9.7.4 Scaling Dependency.............................................................................................................................21

9.8 P8 – DEADBAND....................................................................................................................................22

9.9 P9 – FLOW MEASUREMENT B-COEFFICIENT..................................................................................23

9.10 P10 – FLOW MEASUREMENT C-COEFFICIENT................................................................................24

10 REGISTER SECURITY .................................................................................................................................25

10.1 DESCRIPTION........................................................................................................................................25

10.2 VIEW-ONLY STATUS ...........................................................................................................................25

11 SERIAL PORT SERVICE..............................................................................................................................26

11.1 THE MENU..............................................................................................................................................26

11.2 ACCESSING THE MENU.......................................................................................................................26

11.3 IMPACT ON OPERATION.....................................................................................................................26

11.4 TIMEOUT................................................................................................................................................27

11.5 DATA MONITORING ............................................................................................................................27

11.6 LOCKOUT...............................................................................................................................................27

12 ERROR CODES ..............................................................................................................................................28

13 SUPPLEMENTARY INFORMATION.........................................................................................................29

13.1 APPLICATION EXAMPLE ............................................................................................................................29

13.1.1 Laminar flow element......................................................................................................................29

13.1.2 Accutube/Orifice Plate flow element...............................................................................................29

13.2 MAINTENANCE..........................................................................................................................................29

13.2.1 Battery Model Smart Gauge............................................................................................................29

14 INSTALLATION.............................................................................................................................................30

14.1 ELECTRICAL CONNECTIONS.............................................................................................................31

14.1.1 Power Supply Options.....................................................................................................................31

14.1.2 Setpoint Model Interface Connections............................................................................................31

14.2 CURRENT LOOP MODEL WIRING......................................................................................................32

14.2.1 Current Loop Model Interface Connections ...................................................................................32

14.3 OUTLINE DIMENSIONS .......................................................................................................................33

14.3.1 Panel Mounting...............................................................................................................................33

15 PRODUCT SPECIFICATIONS.....................................................................................................................34

16 SERVICE AND CALIBRATION...................................................................................................................36

1 OVERVIEW

The Meriam Instrument M2110F Gauge is a microprocessor based flow-sensing device that can be used in conjunction with a primary flow element to measure flow rate of clean dry gases. Compatible primary elements include Laminar Flow Elements (LFE), Accutube and Orifice plates. The gauge operates on the principle of measuring differential pressure across the primary element then calculating the flow rate based on user scaling input. The calculated flow rate is then displayed in the selected engineering unit or output for process control or monitoring.

1.1 Features

• Microprocessor –control for reliability and flexibility

• Remote control via RS232 serial link using ASCII character transfer

• Parameters to allow easy configuration of the unit

• Built-in non-volatile memory for storing register settings

• 4-½ digit LCD display with backlight for flow readout

1.2 Models

• Battery Powered Display Indicator only

• Current Loop Model with 4-20 mA Flow Rate Output and RS232 serial interface port

• 10 inH

• AC powered models have an RS232 serial interface port and SPDT outputs

1.3 Flow Calculation Model

O sensors available

1.3.1 Laminar Flow element

Flow = B_Coefficient * dP + C_Coefficient * dP Where: dP = Differential pressure (inH

B-Coefficient and C-Coefficient are provided with the LFE

1.3.2 Accutube or Orifice Plate element

Flow = Flow Constant * √dP Where: dP = Differential pressure (inH

O @ 4 ºC)

O @ 60 ºF)

Warning

The user must scale the gauge for the correct flow measurement display by entering the proper values of the Measurement Model, B-Coefficient, C-Coefficient and or Flow Constant.

2 Safety Warnings

The table below defines the safety symbols, signal words and corresponding safety messa ges used in the manual to identify potential hazards and are intended to warn persons about hazards that could result in personal injury or equipment damage.

This is the Read Instruction Manual symbol. This symbol indicates h that you must read the instruction manual.

This is the Safety Alert symbol. This symbol indicates a WARNING. Warnings alert you to actions that can cause personal injury or pose a physical threat. Please read these carefully.

This is the Safety Glasses symbol. This symbol indicates that you must wear approved safety glasses during the task.

This is the Safety Gloves symbol. This symbol indicates that you must wear approved safety gloves during the task.

Indicates a potentially hazardous situation which, if not avoided, will result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury.

Indicates information essential for proper product installation, operation or maintenance.

Information in this document is subject to change without notice. Check the Meriam web site (www.meriam.com

For customer assistance please call your local Meriam representative or Meriam directly.

) for the latest manual revision.

Meriam Process Technologies

10920 Madison Avenue

Cleveland, Ohio 44102

Telephone: (216) 281-1100

Fax: (216) 281-0228

E-mail: meriam@meriam.com

Web: www.meriam.com

3 Certification / Safety / Warnings

Fire/Explosion Hazard. This instrument is not intrinsically safe. DO NOT use or service in areas that may contain flammable gas or vapors, combustible dusts or

ignitable fibers where an unintended spark can cause a fire/explosion.

Do not exceed the Pressure Limits listed in the Specifications section of this manual. Failure to operate within the specified pressure limit could result in

death or serious injury.

 Do not exceed the Maximum Input Voltage listed under “Input Power” in the Specification section of this manual

 Do not exceed the Switch Rating listed under “I/O” in the Specifications section of this manual.  Disconnect power before servicing.  Substitution of components may impair operation and safety.

4 FRONT PANEL

Warning

All settings must only be entered by qualified personnel, paying particular attention to the safety and precautionary warnings. Changes to the register settings may cause incorrect flow rate display values.

4.1 FLOW METER DISPLAY

4.1.1 Indicators

When the gauge is in the normal measurement mode of operation it will display the Flow Rate, Engineering Unit and Time Base on the LCD display. The top of the display will show the following possible status indicators:

PRGM, SET1/SET2 or 4-20mA, which will be described below.

PRGM:

When the gauge is in Program Mode the display will illuminate the PRGM indicator, which prom pt s the user for further keypad entry data.

SET1/SET2: The SetPoint models will illuminate the SET1 or SET2 indicators to show active level sensing relay outputs. This indicator is also used to indicate that the register that is being edited is used to configure the relay level sensing function. These configuration registers include P5, P6 and P7 for the M2110F Relay Output Model.

4-20mA: The Current Loop models will display the 4-20mA indicator when the 4-20 mA analog output is enabled or when the user is editing the 4-20mA configuration register. These configuration registers include P5, P6, and P7 for the M2110F Analog 4-20mA Output Model.

Decimal Point: The decimal point is used to indicate the status of the Low Flow CutOff detection. If the Low Flow CutOff is active the display will show a flashing decimal point.

4.1.2 Display Refresh Rate

/ O

The M2110F Flow gauge converts signal data from the differential pressure sensor at a rate of ten conversions per second depending on the operating mode of the gauge

. The display is then refreshed at a rate of approximately three

updates per second with a value that can be filtered by a user selectable time constant.

Note: All internal calculations, analog and contact outputs, and serial interface values are updated at the maximum sampling rate.

4.1.3 Display Resolution

The differential pressure sensor range and the A/D conversion hardware in the device define the display resolution. Note that since the Flow Gauge display is user-scaled to flow units, the full scale and resolution depends on the calibration scaling. If a specific value will not fit on the 4½-digit display the auto-range feature will decrease the resolution to allow the display value to fit the available digits.

4.2 KEYPAD OPERATIONS

The front panel keypad incorporates multifunction keys where the functionality will depend on the mode of operation of the gauge.

• Measure Mode is the normal operating display mode of the gauge. This mode is always default after

power-up or reset.

• Program Mode is used to configure the gauge for operation. A PRGM indicator on the display denotes

this mode.

4.2.1 ON/OFF or BACKSPACE

Mode of Operation

Document Symbol: (Backspace←)

Measure Mode

• Battery models: Toggles the gauge ON and OFF.

• SetPoint and Current Loop models: “Resets” the gauge.

Program Mode Backspace function:

Program Mode (P# displayed): backspace key will exit to Measure Mode. Data Edit Mode: Backspace key is used to abort edit operation and exit the register

without making any changes. Note:

When editing a multi-digit value, each backspace key press will backup one digit, until finally exiting the register.

4.2.2 ENGINEERING UNITS or UP ARROW

Mode of Operation

ENG

UNITS

Document Symbol: (Up↑)

Measure Mode No function in this mode. Will generate error code if pressed. Program Mode

Program Mode (P# displayed): Scrolls up through the available programmable registers.

Data Edit Mode: This key allows editing the register value by increasing the value of the flashing digit.

As part of the P9 editing process the Engineering Unit selection can be changed. While changing the units the current unit indicator remains solid, and the newly selected unit indicator will flash. Scrolling through the available units is done by pressing the Up↑ or Down↓ keys. The flashing unit is selected using the PRGM/ENTER→ key, or the process may be aborted by using the Backspace← key.

4.2.3 BACKLIGHT or DOWN ARROW

Mode of Operation

Document Symbol: (Down↓)

Measure Mode Toggles the display Backlight on and off. Note that the default Backlight status for the

Battery model is OFF to conserve battery life. The other models will retain the prior Backlight status as default.

Program Mode

Program Mode (P# displayed): Scrolls down through the available programmable registers.

Data Edit Mode: This key allows editing the register value by decreasing the value of the flashing digit.

4.2.4 PRGM or ENTER

Mode of Operation

Measure Mode Selects Program Mode, which allows access to the programmable registers P0-P10. Program Mode Program Mode (P# displayed): Opens the selected register for editing.

PRGM

Data Edit Mode: When the desired value is selected, pressing the PRGM/ENTER→ key accepts and stores the value.

When editing a multi-digit value, each key press will accept the current digit and proceed to the next until finally accepting the complete value and closing the register.

Document Symbol: (PRGM/Enter→)

4.2.5 ZERO FUNCTION

Mode of Operation

Measure Mode

ENG

UNITS

In Measure Mode, pressing the Up↑ and Down↓ keys at the same time resets the zero reference of the gauge (see page 16).

Document Symbol: (Up↑ and Down↓)

Program Mode In Program Mode, for convenience, this function will reset to P0.

Program Mode (P# displayed): Function will reset the register index to P0. Data Edit Mode: After opening a register for editing, this function will reset the

pressed to accept the new value. This allows for further editing after reset of the value.

5 PROGRAMMING

IMPORTANT:

Programmable registers above P0 cannot be adjusted unless the correct lockou t code is entered or the lockout code is disabled.

PROGRAM MODE ACCESS

[1] [2] [3] [5] [6] [8]

yes no no

yes yes

Notes

[1] Enter program register selection mode [2] Select register number to change [3] View the value of the register currently selected [4] Do you want to change the value? If not go to [6] [5] Increase or decrease the value of the blinking digit, enter PRGM after each digit adjustment is made [6] After modifying the final digit, PRGM will “store” the new value into memory [7] Do other programmable registers need to be changed? If so, return to [2] [8] Exit the program select mode and return to measurement display mode

Key Functions Backspace : This key can be used to abort data entry and escape back to the measure mode display Program : Enters data for storage or mode change Up Arrow : Increments menu selections or digits being edited Down Arrow : Decrements menu selections or digits bein g edi t e d

Press Prgm

Press

Press Prgm

[4] Change

Press

Press Prgm

[7] Change

Press ON/ OFF

5.1 PROGRAMMABLE REGISTER LIST

All M2110F Flow Gauges have programmable registers that allow the gauge to be configured to fit the flow measurement application. The programmable registers are numbered P0 through P10 and each register controls a specific aspect of the gauge’s performance.

During any register editing operation the display will return to the measure mode display after one minute of keypad activity. This will ensure that the gauge will be available for flow measurement observation even if it was unintentionally left in the program display mode.

P0 Lockout Code Lockout for security. 00 to 99 00 = Disabled.

P1 Time-out Automatic shutoff in minutes of

P2 Damp Rate Exponential damping time in seconds. 0.1, 0.2, 0.5, 1, 2, 5,

P3 Measurement

P4 Low Flow

P5 SetPoint

P6 SET1 Controls SET1 relay or 4.00 mA

P7 SET2 Controls SET2 relay or 20.0 mA

P8 Deadband Sets the amount of deadband in

P9 B-Coefficient /

P10 C-Coefficient

Name Description Value Range Notes

Pg. 14

Mode

CutOff

Options

Flow Constant Scaling

Engineering Units

Scaling

keypad inactivity.

Identifies the primary element characteristic (Square Root or Linear)

Minimum display value that will be viewed on the LCD and Serial I/O.

SetPoint Model: defines which relay outputs are active.

Current Loop Model: defines the status of the 4 - 20 mA outputs.

value.

percent of full scale for relays. The scaling constant required to

calibrate the flow measurement equation.

After the entry of numeric data, access to the units selection is allowed.

The scaling constant required to calibrate the flow measurement equation.

0 (disabled), 1, 2, 5, 10, 15, 25

10, 15, 25, 50

0) inH2O display

1) Laminar Flow Element

2) Square Root Element

-19999 to Max. Full Scale

0 = Disabled. 1 = SET1 only. 2 = SET2 only. 3 = Both enabled. 0 = 4-20 disabled 1 = 4-20 enabled –20% to +120% FS User defined value.

–20% to +120% FS User defined value.

0 (disabled), 0.1, 0.2,

0.5, 1, 2, 5, 10% Mantissa range

+/- 9,999 Exponent Range E+9 to E-9 Total Range 0 to 2250

Mantissa range +/- 9,999 Exponent Range E+9 to E-9 Total Range +/- 2.0

Battery models only. Pg. 14

0.1 = No Damping. Pg. 15

Std. InH2O @ 20ºC Pg. 15

LFE InH2O @ 4ºC

SQRT InH2O @ 60ºF Decimal flashes when

activated. Pg. 16 Setpoint and Current

Loop models only. Pg. 17

Pg. 17

Pg. 17 SetPoint model only. Pg. 19 A valid P9 setting is

required for P3=1 or 2.

User can scroll through possible engineering units.

Pg. 20 P10 required for LFE

devices. P3 = 2 only. Pg. 21

6 STARTUP REQUIREMENTS

The initial power up of the M2110F Flow Gauge will require register configuration to match the requirements of the application. The user will be required to enter data to properly characterize the connected flow element. This information can be obtained from the supplier of the primary element.

6.1 Power-Up Sequence

After applying power to the units the gauge will perform the following functions:

Sequence of power-up or reset

1. Display test is performed; all segments of the LCD display are turned on

2. Firmware revision is displayed

3. Full-scale flow is displayed in the selected Engineering Units

4. All prior register values are restored and activated

5. Measure Mode displays the flow in Engineering Units

6.2 Power-Up Error Conditions

6.2.1 Register Range Errors

After power-up of the unit, the gauge will do a self-check of register settings to determine proper settings. If register data is determined to be out of range, the gauge will reset those values to in-range defaults. The user will then be notified of improper configuration settings with an error code display, see Error Code section for details.

Note:

If at power-up the register P9: B-Coefficient / Flow Constant is at a value of zero, the gauge will display inH units in measure mode. If the user attempts to toggle the display to engineering units using the UP ARROW the gauge will display an error and prompt the user to enter the P9 register value.

6.2.2 Non-Register Data errors

If the error condition is a not a register range error, the gauge will display the error code and then lock-up in the error state. Clearing the error condition can only be accomplished through a power down reset of the unit. This will involve removing the battery connection on battery models and unplugging Setpoint and Current Loop models. If the error cannot be cleared and an error code indicating a fatal fault is present, the units may have a hardware problem that can only be corrected by servicing the unit.

6.3 Measurement Model

1. Access P3: Measurement Model

2. Configure the device for the connected primary element

P3 = 0 (Standard inH2O display @ 20ºC)

• Direct differential pressure reading from primary element

P3 = 1 (Laminar Flow Element @ 4ºC)

• Elements requiring measurement equation: Flow = B_Coeff*dP + C_Coeff*dP

P3 = 2 (Square Root Flow Element @ 60ºF)

• Elements requiring measurement equation: Flow = Flow Constant*√dP

Where: B_Coeff and C_Coeff and Flow Constant are calibration constant supplied with the primary element device.

6.4 Low Flow CutOff

1. Access P4: Low Flow CutOff

2. Sets a flow level for which the readout LCD and serial port devices will display a clamped measurement

value.

• For P4 >= 0.0 (Positive or Zero)

• If the measured flow value is below the Low Flow CutOff, the unit display will be forced to a zero

display value. The decimal point will flash to indicate an active

• For P4 < 0.0 (Negative)

• If the measured flow value is more negative than the Low Flow CutOff, the unit will display the

P4 value. The decimal point will flash to indicate an active

Low Flow CutOff.

6.5 B Coefficient/Flow Constant

1. Access P9: B Coefficient/Flow Constant

2. Scales the primary element modeling equation / sets engineering units

• Input the proper setting of this register for both modeling types

3. Select the proper engineering units to match the scaling coefficients see Engineering Units below

6.6 C Coefficient

1. Access P10: C Coefficient

2. Input the proper setting of this register for P3=0 (Laminar Flow Element Modeling)

3. Return to measure mode and verify display for configured units

6.7 Zero Flow Reference

1. Zero the gauge with zero flow through the primary element

2. Press the UP AND DOWN ARROW KEYS simultaneously

3. If lockout is in-active

• Gauge returns to MEASURE MODE

4. If lockout is active

• Enter Lockout Code

• Display will flash 0000 during zero sampling

5. Setpoints might be active(See page 12 for details)

display will flash 0000 during zero sampling

prompt will be L 00

7 ZERO REFERENCE

The gauge zeroing process requires that a flow generating less than 5% of the differential pressure sensors full-scale range be present. This differential pressure generated from the primary element as the zero reference will be measured by the pressure sensor and used as a zero reference for all future flow calculations. Prior to zeroing the gauge all flow should be cut off to the primary element used as the differential pressure source for the gauge sensors.

7.1 AFFECT ON OUTPUTS

The SetPoint and Current Loop outputs are calculated based on the displayed flow. Since re-zeroing the gauge may change the calculated flow, these outputs may be affected by the zeroing procedure. For safety purposes the process should be in a zero flow condition with static pressure when the zeroing is initiated. After the zeroing the threshold settings for the relay or current loop outputs should be checked for proper operation.

7.1.1 RE-ZEROING THE GAUGE / OUTPUTS DISABLED (P5=0):

1. Gauge in MEASURE MODE with zero flow through pri m ary element

2. Press the UP AND DOWN ARROW KEYS simultaneously

3. If lockout is in-active

• Gauge returns to MEASURE MODE

4. If lockout is active

• Enter Lockout Code

• Display will flash 0000 during zero sampling

• Gauge returns to MEASURE MODE

display will flash 0000 during zero sampling

prompt will be L 00

7.1.2 RE-ZEROING THE GAUGE / OUTPUTS ENABLED (P5=1, 2 or 3):

1. Gauge in MEASURE MODE with zero flow through pri m ary element

2. Press the UP AND DOWN ARROW KEYS simultaneously

3. If lockout is in-active

• Press PRGM/ENTER before count reaches 0000 to acknowledge warning

• The display will again count from 0005 to 0000

• Press the UP AND DOWN ARROW keys before count reaches 0000

• The display will flash 0000 several times while sampling the new zero

• Gauge returns to MEASURE MODE

4. If lockout is active

• Enter Lockout Code

• Display will flash 0005 and count down to 0000

• Press PRGM/ENTER before count reaches 0000 to acknowledge warning

• The display will again count from 0005 to 0000

• Press the UP AND DOWN ARROW keys before count reaches 0000

• The display will flash 0000 several times while sampling the new zero

• Gauge returns to MEASURE MODE

display will flash 0005 and count down to 0000

prompt will be L 00

Warning

Never re-zero the gauge when connected to an active controlle d proces s or when known flow is present. The rezeroing process will alter the instrument's measurement output and could cause a sudden change in analog or relay contact outputs.

7.2 FACTORY ZERO

The “Factory Zero” can be restored through the serial interface on the SetPoint and Current Loop gauge models. This is the factory zero value determined during sensor calibration and is typically 0.0.

7.3 RANGE CHECK

The Smart Gauge can be zeroed only when the measured differential pressure is within ±5% of sensors full-scale rating. If the applied differential pressure is greater than 5% of the rated value then an error code will be disp layed when zeroing is attempted.

8 ENGINEERING UNITS

The Engineering units are modified as part of the P9: B-Coefficient/Flow Constant editing process . The purpo se of this dependency is to require the user to enter the required unit scaling prior to selecting the engineering units. Note that the P10: C-Coefficient value may also need to be entered to provide proper scaling to the units selected.

The following engineering units are available on the M2110F Flow Gauge:

1. Gallons /Minute or /Hour

2. Pounds /Minute or /Hour

3. Cubic Feet /Minute or /Hour

4. Liters /Minute or /Hour

5. Percent /Minute or /Hour

6. Kilograms /Minute or /Hour

7. Cubic Meters/Minute or /Hour

8. InH

9. User Units

Notes: [1] When InH

to the display scaling. The InH temperature compensation.

[2] The menu selection indicated by all units flashing and is considered the USER UNITS selection. In measure

mode, indication that the USER UNITS are selected is shown by the absence of all unit indictors.

8.1 CHANGING ENGINEERING UNITS

The user should only change the engineering units at the time of setup and calibration. The engineering unit display value is a direct function of the measurement model P3, and the scaling coefficients that are entered into the P9 and P10 register values.

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

• If lockout is in-active

• If lockout is active

2. When P9 is displayed press PRGM/ENTER to access P9 value

• Modify the P9 decimal value used for the mantissa of the scaler

• Press PRGM/ENTER when finished modifying value

• Modify the P9 decimal value used for the exponent of the scaler

• Press PRGM/ENTER when finished modifying value

• The current engineering units will now be flashing

• Press ON/OFF to return to MEASURE MO DE

O Units1 –Sensor differential pressure

–User Defined Units

O units are selected the P9: B-Coefficient/Flow Constant and P10: C-Coefficients are not applicable

O display data is a direct read of the pressure sensor with the applied P3 related

prompt will be P0

• Increment P# using UP or DOWN ARROW until P9 is displayed

prompt will be L 00 with first digit flashing

• Enter Lockout Code

• Increment P# using UP or DOWN ARROW until P9 is displayed

• Use the UP/DOWN ARROWS to select the new engineering units

• Press PRGM/ENTER after selecting the new units

9 PROGRAMMABLE REGISTERS

9.1 P0 – LOCKOUT CODE

This feature provides security in the Smart Gauge. It is designed to prevent unauthorized personnel from tampering with or inadvertently changing the configuration of the gauge. The lockout is con trolled by a 2-digit setting in the P0 register. If the lockout code is active, the gauge will prompt for the lockout code before allowing any changes to register value. If the correct code is not entered when prompted, an error message will be displayed. If the operator action was to re-zero the gauge, the gauge will simply return to normal Measure Mode operation, without accepting any change. If the operator action was entering Program Mode, the gauge will enter a “view-only” status (see page

25), denoted by the PRGM indicator flashing.

In Program Mode (and during lockout code prompting), the register value is shown as “L xx” to assist in identifying the register. The “L ” indicates “Lockout”, and “xx” will consist of the current value.

All Models

P# P0

Name Description Value Range Notes

Lockout Code Lockout for security. 00 to 99 00 = Disabled.

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

• Press PRGM/ENTER to access P0 value

• Press the UP or DOWN ARROWS to change each digit

• Press PRGM/ENTER to enter each digit

• Press the BACKSPACE to return to MEASURE MODE

3. If lockout is active

• Enter Lockout Code then continue as in 2) above

9.2 P1 – SHUTOFF TIMER

This register sets the automatic shutoff time. The Battery model will automatically shutoff if there is no keypad activity for this length of time. This feature can be disabled by selecting zero in the P1 register. This will allow the gauge to remain on until the ON/OFF key is pressed. Please note that usable battery life will be reduced if the unit remains powered even when not in use. During programming, the choices found in the register correspond to the actual time-out values, in minutes.

prompt will be P0

prompt will be L 00

Battery Models Only

Name Description Value Range Notes

Time-out Automatic shutoff in minutes of

keypad inactivity.

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

• Increment P# using UP ARROW until P1 is displayed

• Press PRGM/ENTER to access P1 value

• Press the UP or DOWN ARROWS to change the selection

• Press PRGM/ENTER to enter the time-out selection

• Press the BACKSPACE to return to MEASURE MODE

3. If lockout is active

• Enter Lockout Code then continue as in 2) above

prompt will be P0

prompt will be L 00

0 (disabled), 1, 2, 5, 10, 15, 25

Battery model only.

9.3 P2- DISPLAY DAMP RATE

The Smart Gauge has a selectable damping rate, which is used to filter the display. The damp rate setting is approximately the time it will take for the gauge to ramp from one stable value to another. The filter characteristic is exponential; changing at a slower rate as the final value is approached.

The “time constant” of the exponential equation is roughly one-fifth of the damp rate setting. This means that the damped value will be roughly 63% of final value after a time equal to one-fifth of the register setting.

The damping function only affects the LCD display and RS 23 2 data val ue s. It does not outputs or the 4 to 20 mA outputs.

Name Description Value Range Notes

affect the action of the relay

Damp Rate Exponential damping time in seconds. 0.1, 0.2, 0.5, 1, 2, 5,

10, 15, 25, 50

0.1 = No Damping.

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

• Increment P# using UP ARROW until P2 is displayed

• Press PRGM/ENTER to access P2 value

• Press the UP or DOWN ARROWS to change the selection

• Press PRGM/ENTER to enter the damp rate selection

• Press the BACKSPACE to return to MEASURE MODE

3. If lockout is active

• Enter Lockout Code then continue as in 2) above

9.4 P3 – MEASUREMENT MODEL

The M2110F Flow Gauge will correctly measure flow when used with a primary element: LFE, Accutube or Orifice plate by measuring the differential pressure across the primary element. Register P3 is used to describe the primary element measurement characteristics as either square root or linear function. If P3=0 then the gauge will display the differential pressure developed across the primary element.

Name Description Value Range Notes

prompt will be P0

prompt will be L 00

All Models

P3 Measurement

Mode

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

• Increment P# using UP ARROW until P3 is displayed

• Press PRGM/ENTER to access P3 value

• Press the UP or DOWN ARROWS to change the selection

• Press PRGM/ENTER to enter the measurement model selection

• Press the BACKSPACE to return to MEASURE MODE

3. If lockout is active

• Enter Lockout Code then continue as in 2) above

Identifies the primary element characteristic ( Square Root or Linear)

The measured differential pressure is automatically compensated for the temperature reference defined for each selection.

prompt will be P0

prompt will be L 00

0) inH2O display

1) Laminar Flow Element

2) Square Root Element

Std. inH2O @ 20ºC P9 and P10 not used.

LFE inH2O @ 4ºC

SQRT inH2O @ 60ºF P10 not used

9.5 P4 – LOW FLOW CUTOFF

This register is used by the gauge to set a minimum active displayable flow value. Once the flow measurement falls below this value the LCD on the front panel and the serial port will show zero flow. This will allow the user to set a low flow threshold so that erroneous or noisy data at the low end of the measurement element will not be displayed by the gauge. A typical setting value for this register might be 0.0 to prevent system noise from causing negative flow measurements from being displayed.

The decimal point is used to indicate the status of the Low Flow CutOff detection. When the unit is in the measure mode of operation and the flow rate falls below the Low Flow CutOff value. The display will show zero with a flashing decimal point.

All Models

P# P4

Name Description Value Range Notes

Low Flow Display CutOff

Flow threshold at which the display will be held at zero.

-19999 to Max. Full Scale

Display shows zero with flashing decimal when measurement falls below this threshold.

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

• Increment P# using UP ARROW until P4 is displayed

• Press PRGM/ENTER to access P4 value

• Press the UP or DOWN ARROWS to change each digit

• Press PRGM/ENTER to enter each digit

• When the flashing decimal point is displayed, press the UP or DOWN ARROWS to change the decimal

point position and sign

• Press the BACKSPACE to return to MEASURE MODE

3. If lockout is active

• Enter Lockout Code then continue as in 2) above

prompt will be P0

prompt will be L 00

9.6 P5 – SETPOINT OPTIONS

This register defines the output action for SetPoint and Current Loop models. Note that if an output is disabled by this register the SetPoint value in its corresponding register (P6, P7) has no impact.

In Measure Mode, the indicators “SET1” and/or “SET2” will illuminate when the corresponding relay is energized. The “4-20mA” indicator will illuminate when the Current Loop output is enabled. In Program Mode, the indicators “SET1”, “SET2”, and “4-20mA” will illuminate as appropriate to assist when scrolling through the register’s choices. Note that if P5 is set for active, the outputs will continue to update even in Program Mode, according to the currently programmed values.

Name Description Value Range Notes

SetPoint & Current Loop Models Only

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

3. If lockout is active

SetPoint Options

• Increment P# using UP ARROW until P5 is displayed

• Press PRGM/ENTER to access P5 value

• Press the UP or DOWN ARROWS to change the selection

• Press PRGM/ENTER to enter the setpoint option selection

• Press the BACKSPACE to return to MEASURE MODE

• Enter Lockout Code then continue as in 2) above

SetPoint Model: defines which relay outputs are active.

Current Loop Model: defines the status of the 4 - 20 mA output.

prompt will be P0

prompt will be L 00

9.7 P6 and P7 – SETPOINT (SET1 and SET2)

9.7.1 Setpoint Model

0 = Disabled. 1 = SET1 only. 2 = SET2 only. 3 = Both enabled.

0 = 4-20 disabled 1 = 4-20 enabled

SetPoint & Current Loop Models Only

Not found on Battery model.

These programmable registers define the flow values at which the relay outputs will energize. The relay will energize when the flow exceeds its corresponding value, and de-e ner gize when the flow drops below the value minus the deadband. Register P6 defines the SET1 relay detection threshold and P7 defines the SET2 relay detection threshold.

9.7.2 Current Loop Model

These programmable registers define the 4 to 20 mA output scaling and range. The P6, SET1 value defines the flow rate that will be represented by a 4.00 mA output signal. The P7, SET2 value defines the flow rate that will be represented by a 20.00 mA output signal. Other flow values provide an output that is linearly scaled between the two end points P6 and P7. For values beyond the defined range the output is li mited from 4.00 to 20.38 mA. The P6 (4-mA) register can be set greater than the P7 (20-mA) register, to create a reverse acting output. The limits are –20% to +120% full scale, but P6 and P7 cannot be set at equal values.

9.7.3 Data Entry

These programmable registers are entered in the current Engineering Unit used by the gauge, which are illuminated during edit of these programmable registers. For example, if the gauge is set to read in gallons/minute, and a value of 110 is put into the P6 register the SET1 relay will energize at 110 gallons.

In Program Mode, the indicators “SET1”, “SET2”, and “4-20mA” will illuminate as appropriate to assist in identifying the edited register. For example, when scrolling to and/or editing P6, “SET1” will illuminate indicating that SET1 is being edited. The same indication applies to the access of the P7/“SET2” value. The “4-20mA” will be illuminated if the gauge is a Current Loop model to indicate that the 4-20mA range is being edited.

9.7.4 Scaling Dependency

If the Engineering Unit is changed along with the appropriate scaling factors the value in the P6 and P7 programmable registers may also require correction to reflect the changes to the scaling and un its.

P# P6

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

3. If lockout is active

Name Description Value Range Notes

SET1 Controls SET1 relay or 4.00 mA

SET2 Controls SET2 relay or 20.0 mA

• Increment P# using UP ARROW until P6 or P7 is displayed

• Press PRGM/ENTER to access the register value

• Press the UP or DOWN ARROWS to change each digit

• Press PRGM/ENTER to enter each digit

• When the flashing decimal point is displayed, Press the UP or DOWN ARROWS to change the decimal

point position and sign

• Press PRGM/ENTER to enter the decimal and sign

• Press the BACKSPACE to return to MEASURE MODE

• Enter Lockout Code then continue as in 2) above

value.

prompt will be P0

prompt will be L 00

–20% to +120% FS User defined value.

P6 cannot equal P7

–20% to +120% FS User defined value.

P6 cannot equal P7

9.8 P8 – DEADBAND

This register is found on the SetPoint model only. The deadband can be set to 0 (disabled), 0.1, 0.2, 0.5, 1, 2, 5 and 10% of full scale flow. The relay will energize at the value in its corresponding P6 and P7 programmable registers for increasing flow values. The relay will de-energize at a value equal to the corresponding P6 and P7 register, minus the deadband value for decreasing flow values. With a 0% deadband setting, the relays will energize and reset precisely at the values in the corresponding P6 and P7 programmable registers. The programming choices found in the register menu correspond to the actual deadband values in percent full scale.

SetPoint Models Only

P# P8

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

3. If lockout is active

Name Description Value Range Notes

Deadband Sets the amount of deadband in

percent of full scale for relays.

prompt will be P0

• Increment P# using UP ARROW until P8 is displayed

• Press PRGM/ENTER to access P8 value

• Press the UP or DOWN ARROWS to change the selection

• Press PRGM/ENTER to enter the deadband setting selection

• Press the BACKSPACE to return to MEASURE MODE

prompt will be L 00

• Enter Lockout Code then continue as in 2) above

0 (disabled), 0.1, 0.2,

0.5, 1, 2, 5, 10%

SetPoint model only.

9.9 P9 – FLOW MEASUREMENT B-COEFFICIENT

All Models

The Flow Gauge calculates flow based on the differential pressure that develops across the primary element used in the flow path. By defining the characteristics of the differential pressure drop as a square root or linear function the smart gauge can calculate the flow rate from the sampled differential pressure. The P9 register defines the scaling for the square root primary element, while the P9 and P10 programmable registers together specify the linear coefficients for the LFE primary elements.

The P9 register is entered in multiple parts, decimal digit (mantissa) and x10 factor (exponent). This is required because of the wide range of the B-coefficient values depending upon the size, type and rating of the primary element. This register is entered first as the decimal (mantissa) part using the normal entry method. Following the entry of this value the display will prompt the user for a x10 factor (exponential) value in the range of E-9 to E+9. Only after the user has edited the P9 value will access to the unit selection list be allowed.

Example : B-Coefficient = .000123 : From primary element data sheet

B-Coefficient = .000123 = 1.23 x 10

Data Entry Display for P9: 1.230 (After Program mode enter)

- E3 (After Decimal digit enter)

Name Description Value Range Notes

-4

= 1.23 E -4

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

3. If lockout is active

B-Coefficient Scaling

• Increment P# using UP ARROW until P9 is displayed

• Press PRGM/ENTER to access the register value

• Press the UP or DOWN ARROWS to change each digit

• Press PRGM/ENTER to enter each digit

• When the flashing decimal point is displayed, Press the UP or DOWN ARROWS to change the sign

• Press PRGM/ENTER to enter the value and sign

• Enter Lockout Code then continue as explained in 2) above

The scaling constant required calibrating the flow measurement equation.

Engineering Units Selection List

prompt will be P0

prompt will be L 00

Mantissa range +/- 9.999 Exponent Range E+9 to E-9 Total Range 0 to 2250

Gallons /Minute /Hour Pounds /Minute /Hour Cubic Feet /Minute /Hour Liters /Minute /Hour Percent /Minute /Hour Kilograms /Minute /Hour Cubic Meters /Minute /Hour InH

O Units

User Units

1) P9 is required for

2) If P5 = setpoints

Pg. 25 The actual Flow

display magnitude will depend on the scaling values entered in to P9 and P10.

LFE and Square Root devices.

enabled ,and P9 is set to zero

4. The display shows the exponent value for P9. Press the UP or DOWN ARROWS to change the exponent

digit.

• Press PRGM/ENTER to enter the digit, the decimal point will flash

• Press the UP or DOWN ARROWS to change the sign of the exponent

• Press PRGM/ENTER to enter the exponent value

• The present engineering units will be flashing. Press the UP or DOWN ARROWS to scroll through the

possible units.

• Press PRGM/ENTER to enter the selected units

5. The current engineering unit will now be flashing

• Use the UP/DOWN ARROWS to select the new engineering unit

• The user can rotate through the list of possible units and time bases

• Press PRGM/ENTER after selecting the new units

6. Press the BACKSPACE to return to MEASURE MODE

9.10 P10 – FLOW MEASUREMENT C-COEFFICIENT

All Models

The Flow Gauge calculates flow based on the differential pressure that develops across the primary element in the flow path. By defining the characteristics of the differential pressure drop as a square root or linear function, the smart gauge can calculate the flow rate from the sampled differential pressure. The P9 register defines the scaling for the square root primary element, while the P9 and P10 programmable registers together specify the linear coefficients for the LFE primary elements.

The P10 register is entered in multiple parts, decimal digit (mantissa) and x10 factor (exponent). This is required because of the wide range of the C-coefficient values depending upon the size, type and rating of the primary elements. This register is entered first as the decimal (mantissa) part using the normal entry method. Following the entry of this value the display will prompt the user for a x10 factor (exponential) value in the range of E-9 to E+9.

Example: C-Coefficient = .000123: From primary element data sheet

C-Coefficient = .000123 = 1.23 x 10

Data Entry Display for P10: 1.230 (After Program mode enter)

- E4 (After Decimal digit enter)

Name Description Value Range Notes

-4

= 1.23 E -4

P10

C-Coefficient Scaling

The scaling constant required calibrating the flow measurement equation.

Mantissa range +/- 9.999 Exponent Range E+9 to E-9 Total Range +/- 2.0

P10 required for LFE devices.

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is in-active

• Increment P# using UP ARROW until P10 is displayed

• Press PRGM/ENTER to access the register value

• Press the UP or DOWN ARROWS to change each digit

• Press PRGM/ENTER to enter each digit

• When the flashing decimal point is displayed, Press the UP or DOWN ARROWS to change the sign.

• Press PRGM/ENTER to enter the value and sign

3. The display shows the exponent value for P10. Press the UP or DOWN ARROWS to change the exponent

digit.

• Press PRGM/ENTER to enter the digit, the decimal point will flash

• Press the UP or DOWN ARROWS to change the sign of the exponent

• Press PRGM/ENTER to enter the exponent value

• Press the BACKSPACE to return to MEASURE MODE

4. If lockout is active

• Enter Lockout Code then continue as in 2) above

prompt will be P0

prompt will be L 00

10 REGISTER SECURITY

10.1 DESCRIPTION

When a gauge is “locked” for security purposes, it does not allow access to register data without first providing the lockout code. A gauge is “locked” by entering a lockout code into the P0 register. After pressing a key on a locked gauge for a desired function “L 00” will appear on the display, with the first 0 flashing. This is the prompt to enter the lockout code.

10.2 VIEW-ONLY STATUS

If a user attempts to enter Program Mode without providing a correct lockout code, the gauge briefly provides an error message, and then enters a “view-only” status, denoted by the PRGM indicator flashing. In this mode, all programmable registers except the lockout code register itself can be viewed, but not changed.

In this view-only status, the operator navigates through the programmable registers exactly the same as if programming the programmable registers. However, the keys that would change a value are simply ignored by the gauge. Thus, the PRGM/Enter→ key will open a register normally; the Backspace← key will close the register, and then return to Measure Mode as expected. The Up and Down Arrow keys do nothing within the register.

GAUGE IN MEASURE MODE

1. Press PRGM/ENTER to access P0 prompt

2. If lockout is active

• Enter Lockout Code

• Press the UP or DOWN ARROWS to change each digit

• Press PRGM/ENTER to enter each digit

If the correct code was entered, the gauge will perform the requested function. Otherwise, an error message is displayed, and the gauge either returns to Measure Mode, or enters a “view-only” status for the programmable registers (if Program Mode was requested).

prompt will be L 00

11 SERIAL PORT SERVICE

SetPoint & Current Loop Models Only

The M2110F Smart Flow Gauge SetPoint and Current Loop models provide RS-232C communication capability. To use the serial service, connect a standard “dumb terminal” or personal computer with terminal software as shown in the wiring diagram on page 29. Set the terminal communication for 9600 baud, 8 data bits, no parity, one stop bit, and no handshaking. The terminal should be able to display at least 24 lines and 70 columns.

11.1 THE MENU

All programmable items of the gauge are available from the menu. Included with the menu is a complete summary of all data representing the current programming and operating status.

A sample view of the menu is shown below for reference. The top line identifies the gauge, firmware revision, and copyright. The second line displays the gauge model, the full-scale sensor range, and the sensor identifier. Next is a reminder notice to the operator (explained below).

Finally, all programmable registers and functions are formatted on the menu. The menu item includes its menuselection character, and the current register data as applicable. To change an item, simply select its character from the terminal keypad; the appropriate sub-menu, notes, and instructions are presented for operator entry. Note that the serial menu typically provides more flexibility for entering data values, compared with the gauge’s keypad.

-------------------------------------------------------------------Notice! Changing any value will PAUSE Gauge Operation; see manual!

-------------------------------------------------------------------Current Full Scale: 25.00 Cu.Ft./hour

-------------------------------------------------------------------A) P0, LockOut Code = Disabled B) P2, Damp Rate = 0.2 Seconds C) P3, Measurement Mode = Square Root D) P4, Minimum Display = 1.0000 Cu.Ft./hr. E) P5, SetPoint Ctrl = Disabled F) P6, SET1 = 0.0000 Cu.Ft./hr. G) P7, SET2 = 0.0000 Cu.Ft./hr. H) P8, Dead Band = 0.0 % Full Scale I) P9, B Coefficient = 1.2340E-01 & Units J) P10,C Coefficient = Not Available P3=2(Square Root) L) Restore Factory Zero M) ReZero Gauge X) EXIT Interactive Menu

Select Choice:

11.2 ACCESSING THE MENU

When the gauge is powered up or reset, it will print the menu to the serial port. Also, hitting the ENTER key from the terminal will reprint the menu. If the terminal is not connected when the gauge prints the menu after power up, the user will see no screen text until he/she presses the ENTER key to establish communications with the device.

11.3 IMPACT ON OPERATION

Use of the serial port service is independent of the operating mode of the gauge, and vice versa. It is not necessary to change to Program Mode to use any of the menu’s features, editing programmable registers or re-zeroing. The gauge continues its active operation regardless of the serial port service, except for the pausing explained in the next paragraph. Any keypad activity from the front panel of the gauge will also be processed regardless of the serial port status. If entries are made through the keypad and the serial port simultaneously, the last entry received will be active.

While the serial port is transferring data, the other functions of the gauge are paused to allow this task to complete. In this paused state, the display is frozen and the outputs are not updating. Typically, the data transfers are very short and thus the interruption is minimal. However, selecting a register for edit will completely stop normal gauge operation, because the gauge is awaiting the operator’s input. During this state, the display is blanked and as soon as the operator selection or entry is complete, the gauge resumes normal operation.

Warning

The Notice of “PAUSE Gauge Operation” near the top of the menu is a reminder about this explanation. It is particularly important when a gauge is in service as an in-process instrument, since the gauge will not respond to process conditions while it is paused.

11.4 TIMEOUT

When the menu is displayed, it has no impact on gauge operation or performance. Therefore, the menu will remain displayed indefinitely, or until the operator takes action or the gauge is reset. When the gauge is stopped awaiting operator input the gauge’s display is blanked and the outputs are frozen. In this state, if there is no terminal keyboard activity for approximately one-minute, the operation will time-out and the gauge is returned to its operating mode.

11.5 DATA MONITORING

Selecting “X” from the menu will EXIT the menu and begin data monitoring. If the gauge was in Program Mode, it will be returned to Measure Mode to allow data monitoring.

During data monitoring, every analog-to-digital conversion from the pressure sensor is displayed on the terminal. The additional load of the continuous serial communication will slightly reduce the overall performance of the gauge. The resulting data rate will typically be about ten (10) conversions per second, depending on various operating conditions. Note that the data sent to the terminal will be damped according to the damp rate set in register P2.

The data includes the pressure value and Engineering Units, as well as the output status of either the relay SET1 ON, SET2 ON or the 4-20 mA output value, if set. Note that this status indication is the internal calculated value, as there is no feedback hardware on the gauge. "Over Pressure!” is indicated if the input pressure exceeds 120% of the full-scale sensor range. This indication acts on the direct measurement of pressure regardless of the damp rate setting.

If the gauge is taken out of serial Measure Mode the data monitoring function will pause with a message. The menu is available at this time, as it is at any time, by hitting ENTER from the terminal. When the gauge is returned to Measure Mode, if the menu was not activated, data monitoring will automatically resume.

Data logging can be accomplished be invoking the appropriate logging function of the terminal software.

To EXIT the data monitoring function, simply hit ENTER on the terminal to restore the menu.

11.6 LOCKOUT

If the lockout feature is active, see register P0, the serial menu will prompt for the lockout code if necessary. For security purposes, an asterisk (*) is displayed instead of the character as it is typed. When entering a new lockout code through the serial port, however the code is displayed as it is typed, since there is no confirmation step.

12 ERROR CODES

All Smart Gauge models have an error/message feature to inform the operator of problems with the operation or programming of the gauge. These Error Codes and messages are identified and described in the table below.

ERROR DESCRIPTION “OP” Overpressure warning. The measured pressure exceeds the full-scale pressure by 20% of full scale or

more. Sensor is at risk of permanent damage!

E001 Automatic Shutoff timer has expired (Battery model only); gauge is shutting down normally. E002 Requested ZERO value is not within 5% of full-scale pressure, and therefore ignored. E003 Requested SET1 or SET2 is out of range. Must be greater than 0 and less than +120% Full Scale. E004 SET1and SET2 values are equal. This configuration is not acceptable on Current Loop models. To

disable the output, Set register P5 = 0 (see page 1).

E005 User register found to be out of range after powerup. The register was forced to a default value and

then re-saved to memory by the initialization function.

E006 User entered incorrect Lockout Code. Gauge is locked. A view-only status will be entered if Program

Mode was requested. E007 Access to P10 register was rejected because P10 is invalid when P3 = 0 or P3=2. E008 Entry of the P9 or P10 register value was out of range. Access to P9 was rejected because of P3 = 0

setting. The output functions P5 were disabled because user entered P9 = 0. E009 Access to P5, P6, or P7 was rejected because the value of P9 = 0.0. The user must enter a usable value

into P9 before access to P5-P7 is allowed. E010 Full Scale Range for Engineering Units selected is beyond scale of display (>19,999) or the full-scale

range is equal to zero because of incorrect P9 or P10 register setting. E011 User attempted to use the ENG arrow key in measure mode. This key has no function in this mode,

see P3 setup and P9 entry for units selection process. E012 User attempted to enter P4 Low Flow Cut Off value greater than or equal to the Full Scale Units. E020 Low Battery (or power supply) Warning. This error will show repeatedly approximately every 10

seconds, so long as the voltage supply remains low.

E030* EEProm Error. Display alternates between “E030” and a sub-Ecode. This error is generated if the

EEProm data is out of range after power-up. Units can recover from these errors by OFF/ON reset.

The variables are forced into range after the OFF/ON reset. If the unit cannot recover from the

Error, the fault may be due to hardware malfunction. Please consult the factory for assistance.

All programmable registers should be rechecked for valid data after power-up.

E110 Displayed flow or pressure range error. The value to be displayed is out of range. Check the settings

E210* Internal display error. Cannot display character . Consult factory, possible hardware problem. E211* Internal display error. E213* Internal display error. Attempting to display 2.0000 on the display.

• These Error codes may indicate a hardware or other internal problems; if the problem cannot be corrected by

cycling the input power supply on and off, please take note of the error code and operating conditions, and contact Meriam Instrument at (216) 281-1100.

SUB-

ECODE

1 Factory sensor detection error: Sensor range or type is invalid

2 Not Used

4 Not Used

8 Factory or User Zero value is out of range

16 User register found out of range

32 Factory configured data pressure incorrect

64 Factory configured temperature data incorrect

128 EEProm data storage error

of P3, P9 and P10. Note: P9 cannot equal zero when P3 = 1 (LFE) or 2 (Sq.Rt) modes.

DESCRIPTION

Note: Ecode is accumulation of errors. Example: ECode 129 = Error 1 and Error 128

13 SUPPLEMENTARY INFORMATION

13.1 Application Example

13.1.1 Laminar flow element

Primary Element: Laminar Flow Element (LFE) Model 50MJ10-9 Nominal Air flow Range = 3.00 cubic feet/minute B-Coefficient = 4.2847E-1 C-Coefficient = -5.0523E-3

Gauge requirement: M2110F with 10.00 inH2O sensor

Application requirements: Monitor airflow in units of cubic feet/minute Setup Relay outputs to detect low limit at 1.25 cu.ft/min

Settings: P3 = 1 : Measurement Model = LFE P5 = 1 : Setpoint Option = SET1 Only P6 = 1.250 : SET1 limit = 1.250 cu.ft/min P9 = 4.285 : Rounded deci mal part of the B-Coefficient = - E1 : Exponent of B-Coefficient P10 = -5.052 : Rounded decimal part of the C-Coefficient = - E3 : Exponent of C-Coefficient

13.1.2 Accutube/Orifice Plate flow element

Primary Element: Accutube Flow Element Maximum Air flow Range = 750 SCFM DP at maximum air flow = 15 inH

Application requirements: Monitor airflow in units of cubic feet/minute Setup Relay outputs to detect low limit at 25 cu.ft/min

Gauge requirement: M2110F with 28.000 inH

Settings: P3 = 2 : Measurement Model = Square Root Device P5 = 1 : Setpoint Option = SET1 Only P6 = 25 : SET1 limit = 25 cu.ft/min

P9 = 193.65 : Flow Constant =

O sensor

FlowRangeMaximumAir

mAirFlowDPatMaximu

13.2 Maintenance

13.2.1 Battery Model Smart Gaug e

The battery can be changed by removing the front face cover on the smart gauge and then removing the PC board assemblies as described below.

1. Remove the four (4) front face screws.

2. Carefully fold down front face cover and slide electronics board assembly forward until the sensor ribbon cable

can be unplugged.

3. Slide the assembly completely out of the housing, unplug battery board and attach replacement.

4. Re-assemble the unit in reverse order.

5. Check to ensure that the sensor cable, battery board and front panel

the front faceplate.

are re-connected properly before reattaching

14 INSTALLATION

Differential pressure sensors have two pressure connections on the back of the gauge. The diagram below shows the correct connections to obtain the desired type of pressure measurement.

The SetPoint model utilizes the multifunction terminal strip shown at the left. This terminal strip has a NEMA 1 rating. The SPDT relays are not powered internally by the gauge. Jumpers from the 24Vdc, 110Vac or 220Vac power sources can be used if required.

The Current Loop model uses a cannon connector that is designed to meet NEMA 4X requirements. The charts at the left show the terminal and wiring arrangement. See wiring schematics for the three and four wire, 4 to 20 mA loops shown.

Note: The Smart Gauge comes with 1/8” FNPT pressure port(s). Gauge and Absolute models only use one pressure port. The unused port vents the enclosure/sensor to atmosphere. DO NOT REMOVE THE SINTERED PLUG (ALLEN HEAD FITTING). The Smart Gauge should be panel-mounted or held firmly in one hand while a small wrench is used to tighten the 1/8” MNPT pipe thread. Do not tighten the fitting without using a wrench on the manifold.

14.1 ELECTRICAL CONNECTIONS

Setpoint models come with a terminal block interface while the Current Loop model comes with an eight-pin circular connector/cable interface. Note: The cable is supplied with the Current Loop model.

14.1.1 Power Supply Options

The M2110F SMART GAUGE can be supplied in three possible hardware configurations.

1. Battery Model ..………….Unit powered by internal batteries

2. Setpoint Model …………..Unit includes two programmable relay outputs

3. Current Loop Model …….Unit includes 4-20 mA output

14.1.2 Setpoint Model Interface Connections

Terminal

1 2 SET1 / C Relay1 output Common

3 SET1 / NC Relay1 output Normally closed 4 SET2 / NO Relay2 output Normally open 5 SET2 / C Relay2 output Common 6 SET2 / NC Relay2 output Normally closed 7 No Connection None 8 RS232 Common RS232 interface common connection 0 VDC 9 RS232 Tx RS232 transmit output connection For Serial Menu 10 RS232 Rx RS232 receive input connection For Serial Menu

A B GND AC Ground

Description Function Notes

SET1 / NO Relay1 output Normally open

Frame Ground Earth Connection

NO EXTERNAL POWER SUPPLY REQUIRED

EXTERNAL POWER SOURCE: 24 VDC, 115 VAC or 230 VAC

EXTERNAL POWER SOURCE: 24 VDC

C 0 VDC Common Connect only if not using AC inputs D +24 VDC IN +24 VDC Input Nominal Connect only if not using AC inputs

E Reconnectable Transformer Primary Jump er E to H NC F Reconnectable Transformer Primary Jumper F to J NC H L2 Reconnectable Transformer Primary (See E above) L2 / 230 VAC J Reconnectable Transformer Primary (See F above) Jumper J to K K N Transformer Primary Fused Input Line Neutral L L1 / L Transformer Primary Fused Input L 115 VAC L1 / 230VAC

DC POWER SUPPLY CONNECTIONS

AC POWER SUPPLY CONNECTIONS Reconnectable 115/230 Primary

115 VAC INPUT

230 VAC INPUT

Note: See Appendix for wiring specifics.

14.2 CURRENT LOOP MODEL WIRING

14.2.1 Current Loop Model Interface Connections

The Current Loop Model connections are made through the supplied interface cable. The cable is connected to an eight (8) pin circular receptacle on the back of the unit. These connections will be defined by wire color coding of the cable.

Pin # Wire

Description Function Notes

Color

1 2 WHITE -LOOP 4-20 mA Analog Return (+) mA output to receiver 3 RED +LOOP 4-20 mA Loop Power Input 4 GREEN +24VDC IN Gauge Power Supply Input + 24 VDC Input Nominal 5 NOT USED 6 BROWN RS232 Common RS232 interface common connection 0 VDC 7 BLUE RS232 Rx RS232 receive input connection For Serial Menu 8 ORANGE RS232 Tx RS232 transmit output connection For Serial Menu

BLACK

0 VDC IN Gau ge Power Supply Common 0 VDC Input

Note: See Appendix for wiring specifics.

2110F

24 VDC/ 50 mA Power Supply

Gauge & Loop Power

2110F

24 VDC/ 50 mA Power Supply

Gauge & Loop Power

3 WIRE SINKING

4 WIRE SOURCING

2110F

FLOW GAUGE

LOOP + Power Supply 24 VDC

20mA

GAUGE Power Supply 24 VDC/ 30 mA

4 WIRE FLOATING

Note: R = Receiving Device

14.3 OUTLINE DIMENSIONS

14.3.1 Panel Mounting

1. Make a ¼ DIN panel cutout per drawing.

2. Remove the two 6-32 socket head screws in

the grooves at the rear of the gauge.

3.60 in. (92mm)

PANEL MOUNT CUTOUT

3.60 in. (92mm)

3. Slide the panel mount jacks out of the groove.

4. Insert the gauge through the front of the panel.

5. From the rear, insert the panel mount jacks in

the grooves on the side of the gauge, and slide them firmly against the panel.

6. Replace the two 6-32 socket head screws.

7. Tighten the panel mount jack against the panel

with the two socket head screws.

8. Refer to the note on page 30 when making

pressure connections.

15 PRODUCT SPECIFICATIONS

TYPE & RANGE:

DN: Differential Non-Isolated CI: Compound Isolated GI: Gauge Isolated AI: Absolute Isolated DI: Wet/Wet Differential Isolated

MEDIA COMPATIBILITY: clean, dry, non-corrosive gases. Isolated sensor for fluids compatible with 316SS. DI sensors have viton o-rings (consult factory for further options).

ACCURACY*: (includes combined effects of linearity, repeatability, hysteresis and temperature). Analog output: ± 0.05% of Full Scale + 3 counts. AC-powered gauges require 15 minute warm-up. NIST certification supplied.

ZERO DRIFT: to measurement eliminates this effect.

TEMPERATURE: Storage: -40 °F to 140 °F (-40 °C to 60 °C) Operating: -4 °F to 122 °F ( -20 °C to 50 °C)

PRESSURE LIMITS: sensors. 2x range for DN sensors when pressurized on high side only; 150 PSI static when applied to both sides of the sensor simultaneously. 3x range for DI sensors when pressurized on high side only, 1000 PSI static when applied to both sides of the sensor simultaneously. 3x range or 150 PSI on low side whichever is less.

Indication: ± 0.05% of Full Scale

± 0.015% of full scale. Zeroing prior

Non-isolated sensor for

2x range for AI, GI, and CI

DISPLAY: 4 1/2 digit, 0.6 inch (15.24 mm) LCD. PRESSURE CONNECTIONS:

Brass on non-isolated, 316SS on isolated sensors. INPUT POWER:

selectable 110V AC 50/60 Hz, 220V AC 50/60 Hz, or 24V DC power. Included are an RS 232C interface and two programmable SPDT relays, rated 1.0 amp resistive @ 24V DC, 0.5 amp resistive @ 115V AC.

Battery models are powered by two Lithium “D” Cells. Battery Life is approximately 100 days at a 100% duty cycle.

I/O:

Included are an RS 232C interface and two programmable SPDT relays, rated 1.0 amp resistive @ 24V DC, 0.5 amp resistive @ 115V AC.

Option 1: Lithium Battery model with

replaceable battery board with automatic shut-off

(programmable). No outputs available.

Option 2: Current Loop model with 4-20mA

output, 24V DC (50mA) power and RS 232C. ENCLOSURE:

aluminum enclosure with epoxy finish. Standard model is NEMA 4X on front panel only. Battery and Current Loop models are NEMA 4X throughout.

MOUNTING: Options: 2" pipe mount bracket; or portable handle.

SetPoint model is standard with

4 lbs. 1/4 DIN (3.8" X 3.8" X 6.5")

1/4 DIN panel mounting standard.

1/8" female NPT.

Sensor Ranges

Sensor Type Available Ranges Native Engineering Units

DN = Differential Non Isolated 0-10, 0-28, 0-200, 0-415, 0-2000 Inches of H2O @ 20°C GI = Gauge Isolated 0-15, 0-30, 0-50, 0-100, 0-300, 0-

500, 0-1000, 0-3000

CI = Compound Isolated -15 to 15, -15 to 30, -15 to 50, -15

to 100, -15 to 500. -15 to 1000, -15

to 3000 AI = Absolute Isolated 0-17, 0-38, 0-100, 0-1000 PSIA DI = Differential Isolated 0-5, 0-15, 0-30, 0-100, 0-300, 0-

500, 0-1000

DN/DI Pressure Manifold DI with Optional Flushing Ports AI, GI, or CI Pressure Manifold

PSI

PSID

Range Limits and Indication

Sensor Type

DN Under

Hard Soft Certified Soft Hard Under Under Range Over Over Range Range (F.S.) Range Range

-20 to 0% 0 to 100% 100 to

-20%

120%

Over

120%

Under

-20%

Under

-20 to 0% 0 to 100% 100 to 120%

-20

0 to 100% 100 to

120%

0 to 100% 100 to

120%

0 to 100% 100 to

120%

Over

120%

Over

120%

Over

120%

Over

120%

Notes:

DN units will measure to -20% (or -10 PSID, whichever is greater pressure relative to absolute zero) and +120% of full scale pressure. Calibration certification is for 0 – F.S. (Full Scale Only).

DI units will measure to -20% (or -150 PSI, whichever is greater pressure relative to absolute zero) and +120% of full scale pressure. Calibration certification is for 0 – F.S. (Full Scale Only).

GI units will measure to -20% (or -10 PSIG, whichever is greater pressure relative to absolute zero) and +120% of full scale pressure. Calibration certification is for 0 – F.S. (Full Scale Only).

CI units will measure to negative barometric pressure (typically -14.7 PSIG) and to +120% of full scale pressure. Calibration certification is for

-14.5 PSIG to F.S. (Full Scale Only).

AI units will measure to +120% of full scale pressure. Calibration certification is for 0 PSIA to F.S. (Full Scale Only).

Hard Over & Under: Display will read "OP" (Under -20% or Over 120%).

Soft Over & Under: Display will still read out at (± 20%).

16 Service and Calibration

In the event an M2110 requires service or needs to be returned for factory recertification, battery replacement, or recalibration, please contact Meriam at the numbers listed below. The battery board should only be replaced by properly trained technicians in a controlled environment. Contact Meriam for further details

DO NOT send any unit in for service without first contacting Meriam for a Return Material Authorization (RMA) number. If this number has not been obtained and clearly marked on the return packaging, the unit will be returned at the shipper’s expense. An RMA number will be provided by the Meriam Repair Department

when you call, fax or e-mail your information. Certification for Non-Hazardous Materials will also be required. The RMA number must accompany all incoming packages to insure proper tracking, processing and repair work.

To assist us in processing your service request, please have the Model & Serial Number of the unit available when you call. This information is located on the product label.

Meriam Process Technologies

10920 Madison Avenue

Cleveland, Ohio 44102

TELEPHONE: (216) 281-1100 FAX: (216) 281-0228

E-mail: service1@meriam.com Web Site: www.meriam.com

Meriam M2110F User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual