Meriam M2110P User Manual
M2110P SMART PRESSURE GAUGE
Meriam’s M2110P Smart Pressure Gauge is a microprocessor-based pressure sensing
device. The various ranges available provide measurement of differential (dry/dry or wet/wet),
gauge, compound or absolute pressure. 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 configured through the RS-232 serial
communication connection.
The Battery models are powered by internal lithium batteries. This model has an LCD for
indication only; it does not support any outputs or RS-232 communications.
SetPoint and Current Loop models have outputs that can be used for control or
indicating/recording 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 pressure data and output status. It can also be used as part of a control system
with digital capabilities.
The SetPoint model provides two SPDT relay outputs with adjustable deadband. This
configuration provides normally open or normally closed contact operation. Switch SetPoints
can be set from –20% to +120% of the full scale pressure range. The SetPoint model is
powered by 120/240 VAC, or 24VDC.
The Current Loop model provides a 4 to 20 mA output three or four wire pressure transmitter
operation. LRV and URV are set through user-programmable registers from –20% to +120%
of the full scale pressure range. The output is capable of normal and reverse action. The
Current Loop model is powered by 24VDC only.
User’s Manual Dwg No. 9R141-IR (1/2011)
USER’S MANUAL
Safety Information
Failure to follow all instructions could result in injury. Read, understand and follow all safety
warnings and instructions provided with this product. Also, meet or exceed your employer’s
safety practices.
In no event shall Meriam be liable for any indirect, special, incidental, consequential or punitive
damages or for any lost profits arising out of or relating to any services provided by Meriam or its
affiliates. It is not possible for Meriam to identify all foreseeable uses/misuses, therefore all persons
involved in commissioning, using or maintaining this product must satisfy themselves that each
intended application is acceptable.
Safety Warnings
The table below defines the safety symbols, signal words and corresponding safety messages 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 the latest manual revision.
For customer assistance please call your local Meriam representative or Meriam directly.
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
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Table of Contents
1. Certification / Safety / Warnings.....................................................................4
2. Pressure Display............................................................................................5
3. Keypad Functions..........................................................................................6
4. Programmable Register Overview.................................................................8
5. Engineering Units ..........................................................................................9
6. Zero Reference............................................................................................10
7. P0 – Lockout Code All Models...................................................................11
8. P1 – Time Out Value Battery Models Only................................................12
9. P2 – Damp Rate All Models.......................................................................13
10. P3 – Density of Water Reference Temperature All Models........................ 14
11. P4 – User Scale All Models .......................................................................15
12. P5 – SETPOINT Options Set Point & Current Loop Models Only..............17
13. P6 & P7 – SETPOINT (Set1 & Set2)...........................................................19
14. P8 – DEADBAND Set Point Models Only..................................................21
15. Lockout Code Prompt..................................................................................22
16. Serial Port Service.......................................................................................23
17. Error Codes .................................................................................................26
18. Installation & Wiring.....................................................................................27
19. Outline Dimensions......................................................................................29
20. Panel Mounting............................................................................................29
21. Product Specifications .................................................................................30
22. Range Limits and Indication ........................................................................31
23. Service and Calibration................................................................................32
User’s Manual Dwg No 9R141-IR
3
1. 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 Product 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 Req uirements” 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 servicin g.
Substitution of components may impair operation and safety.
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2. Pressure Display
Indicators
During normal operation, the gauge disp lays the pressure value in large numerals, and the bottom of
the display shows the current Engineering Unit. The top of the display will show PRGM wh en the
gauge is in Program Mode (flashing when “view only”). For SetPoint models, the top of the display
will show SET1/SET2 to indicate activated outputs (or corresponding register opened in Program
Mode). For Current Loop models, the top of the display will show 4-20mA when the output is
enabled (or corresponding register opened in Program Mode). Finally, an ABS indicator illuminates
when an Absolute Isolated sensor is used.
Performance
The M2110P Smart Gauge retrieves analog data from its pressure sensor, and performs an analog-to-
digital (A/D) conversion for microprocessor-based data handling. The rate of A/D conversion will
typically be between 10 to 14 conversions per second, depending on the various operating conditions.
To make the display easier to read, only every fourth sample is updated on the display. (This results in
a display update rate of about 3 updates per second.) The intern al calculations, outputs, and serial
interface are updated at the full conversion rate.
Resolution
The display is limited to 4½ digits, and the resolution of the d ata (decimal po int po sition ing) is de fined
by the range and sampling process. If a specific value will not fit on the 4½ digit display, however, the
auto-range feature will decrease the resolution to allow the value to fit the display (for example,
increasing past 199.99 becomes 200.0). The auto-range feature restores the decimal resolution with a
built-in deadband of 5 display counts (for example, 200.0 must drop to 199.95 before the two-digit
decimal resolution is restored).
Note that the full scale display indication during power-up will not necessarily have the same decimal
resolution found during actual pressure monitoring.
User’s Manual Dwg No 9R141-IR
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3. Keypad Functions
/
The keys on the front panel perform multiple functions. Their function differs depending on whether the gauge
is in Measure Mode or Program Mode.
• Measure Mode is the normal operating mode for measuring and displaying pressure. This mode is
always default after power-up or reset.
• Program Mode is used to configure the various options of the gauge. This mode is denoted by a
PRGM indicator on the display.
ON/OFF /
Backspace
ON
Document Symbol: (Backspace←)
OFF
Key
Measure Mode
Program Mode
ENG
UNITS/Up
Arrow Key
Measure Mode
• Battery models: Toggles the gauge ON and OFF.
• SetPoint and Current Loop models: “Resets” the gauge.
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 range of sensor is displayed in the last Engineering Unit used.
4. All prior register values are restored and activated.
5. Measure Mode displays pressure in the last Engineering Unit used.
Backspace function:
From Program Mode, this key will exit to Measure Mode.
When editing a register, this key is used to abort a programming operation and exit the
register without making any changes.
When editing a multi-digit value, each key press will backup one digit, until finally
exiting the register.
ENG
UNITS
Allows the Engineering Units to be changed. During Engineering Unit selection, the
current unit indicator remains solid, and the “new” unit indicator is flashed. 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.
Document Symbol: (Up↑)
Program Mode
(and EU Selection)
Scroll up function. Scrolls up through the available programmable registers. Once a
register is opened, this key allows editing by scrolling up through the values in the
register.
6
Backlight/Do
wn Arrow Key
Document Symbol: (Down↓)
Measure Mode
Program Mode
(and EU Selection)
PRGM/Enter
Key
Measure Mode
(and EU Selection)
Program Mode
Re-ZERO Key
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.
Scroll down function. Scrolls down through the available programmable registers. Once
a register is opened, this key allows editing by scrolling down through the values in the
register.
PRGM
Selects Program Mode, which allows access to the programmable registers. This key
is also used to accept a new Engineering Unit selection.
Opens the selected programmable register for editing.
When the desired value is displayed, pressing the PRGM/Enter→ key accepts and
stores the value, and closes the register.
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.
ENG
UNITS
Document Symbol: (PRGM/Enter→)
Document Symbol: (Up↑ and Down↓)
+
Measure Mode
Program Mode
(and EU Selection)
In Measure Mode, pressing the Up↑ and Down↓ keys at the same time resets the zero
reference of the gauge (see page Error! Bookmark not defined.).
In Program Mode, for convenience, this function will reset the current value to default.
For example, in Program Mode (but before opening a register), this function
will reset the register scroll to P0.
After opening a register for editing, this function will reset the register’s data
value to default (typically 0).
Similarly, when selecting a new Engineering Unit, this function will reset the
selection to the first unit (InH
Note that even when using this “reset” function, the PRGM/Enter→ key must be
pressed to accept the new value (this allows for further editing after reset of the value).
O).
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User’s Manual Dwg No 9R141-IR
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4. Programmable Register Overview
All M2110P Smart Pressure Gauges have programmable registers that allow the gauge to be configured to fit
the pressure measurement application. Programmable registers are numbered P0 through P8. Each register
controls a specific aspect of the gauge’s performance.
A description of all programmable registers, and step by step instructions for their use, is included below. Each
register is found on all M2110 series models, and performs the same function described for all models, ex cept
as noted otherwise.
Px
Name Description Value Range Notes
Lockout Code Lockout for security. 00 to 99 00 = Disabled.
P0
Timeout Automatic shutoff in minutes of keypad
P1
Damp Rate Exponential damping time in seconds. 0.1, 0.2, 0.5, 1, 2, 5,
P2
Density of Water
P3
Reference
Temperature
User Units
P4
Full Scale
SetPoint Options
P5
SET1 Controls SET1 relay or 4.00 mA value. –20% to +120% FS User defined value.
P6
SET2 Controls SET2 relay or 20.0 mA value. –20% to +120% FS User defined value.
P7
Deadband Sets the amount of deadband in percent
P8
inactivity.
Sets reference temperature for water
density when gauge is set for water
column units.
Enables gauge to display units other
than factory defined Engineering Units.
SetPoint Model: defines which relay
outputs are active.
Current Loop Model: defines the status
of the 4 - 20 mA output.
of full scale for relays.
0 (disabled), 1, 2, 5,
10, 15, 25
10, 15, 25, 50
20°C, 4°C, or 60°F
0 to 9,999 (Keypad)
0 to 19,999 (Serial)
0 = Disabled.
1 = SET1 only.
2 = SET2 only.
3 = Both enabled.
0 = 4-20 disabled
1 = 4-20 enabled
0 (disabled), 0.1,
0.2, 0.5, 1, 2, 5, 10%
Battery model only.
0.1 = No Damping.
User defined value.
Not found on
Battery model.
SetPoint model
only.
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5. Engineering Units
The following Engineering Units are available on the M2110P:
1. InH
2. PSI – Pounds per Square Inch
3. Kg/cm2 – Kilograms per Centimeter squared
4. kPa – KiloPascals
5. mBar – milliBar
6. Bar – Bar
7. cmH
8.
9.
10.
O – Inches of Water Column (ref. temp. selections: 20°C, 4°C, 60°F)
2
O – Centimeters of Water Column (ref. temp. selections: 20°C, 4°C, 60°F)
2
inHg – Inches of Mercury Column (ref. temp. 0°C)
mmHg – milliMeters of Mercury Column (ref. temp. 0°C)
User Units – User Defined Units
STEP BY STEP: CHANGING ENGINEERING UNITS
Step Action Display
1
2
3
4
Notes
Gauge should be in the normal Measure Mode. Normal Pressure Display.
Press the ENG UNITS (Up↑) key.
If the lockout is active, the gauge will now prompt for entry of
the lockout code. Refer to “STEP BY STEP: ENTERING A
LOCKOUT CODE (When Prompted)” on page 22.
Press the Up↑ or Down↓ keys repeatedly to scroll
to the desired Engineering Unit.
The Zero function (Up↑ and Down↓) will reset the scroll to the
first unit and allow selection to continue.
Press the PRGM/Enter→ key when the desired
unit is flashing.
1. When scrolling through Engineering Units, User Units are denoted by all units flashing.
2. In Measure Mode, User Units are denoted by no Engineering Unit indicators shown on the bottom
of the display.
3. Changing the Engineering Unit will automatically update the setpoint registers as appropriate (refer
to the Automatic Update section on page 19 for furt he r e xplanation).
4. At any time, the Backspace← key will abort the process and return to Measure Mode.
5. If there is no keypad activity for approximately 1 minute, the operation is aborted and the gauge
returns to Measure Mode unchanged.
Current Engineering Unit1 indicator flashes.
The current Engineering Unit indicator remains
solid since it is active, and the unit to be selected
flashes as the list is scrolled.
The display switches to the new Engineering Unit
and returns to Measure Mode.
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User’s Manual Dwg No 9R141-IR
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6. Zero Reference
p
y
Zeroing the gauge consists of accepting the current pressure value as the zero pressure reference. To set the
zero reference pressure, all pressure sources should be disconnected from the gauge, and its temperature should
be stable.
The pressure reading of the gauge is linearly offset from the zero reference value. Absolute-Isolated pressure
sensors are theoretically zero-referenced to absolute zero pressure (perfect vacuum), and cannot be re-zeroed
without a vacuum source.
AFFECT ON OUTPUTS
The SetPoint and Current Loop outputs are calculated based on the displayed pressure. Since re-
zeroing the gauge may change the displayed pressure, the outputs may change accordingly. For safety
purposes, an extra step is required to warn the operator and confirm the desired action. For clarity,
both scenarios are described below, step-by-step.
FACTORY ZERO
The “Factory Zero” can be restored through the serial port service only (SetPoint and Current Loop
models only). This is the value set during calibration of the sensor, and is typically 0.0.
RANGE CHECK
The M2110P can be zeroed only when the applied pressure is within ±5% of full scale. If the applied
pressure is greater than 5% of full scale, an error code will be displayed when zeroing is attempted.
STEP BY STEP: RE-ZEROING THE GAUGE (Disabled Outputs, P5=0)
Step Action Display
1
2
1
2
Gauge should be in normal Measure Mode, and the
applied pressure is ready for zeroing (typically
vented, or vacuumed for absolute sensors).
Press the Up↑ and Down↓ keys simultaneously.
If the lockout is active, the gauge will now prompt for entry of
the lockout code. Refer to “STEP BY STEP: ENTERING A
LOCKOUT CODE (When Prompted)” on page 22.
WHEN OUTPUTS ARE ACTIVE (P5>0) ...
Gauge should be in normal Measure Mode, and the
applied pressure is ready for zeroing (typically
vented, or vacuumed for absolute sensors).
Press the Up↑ and Down↓ keys simultaneously.
If the lockout is active, the gauge will now prompt for entry of
the lockout code. Refer to “STEP BY STEP: ENTERING A
LOCKOUT CODE (When Prompted)” on page 22.
Normal pressure display, near 0.0.
The display will flash “0000” several times while
the new zero is taken, and then return to Measure
Mode with the new zero activated.
SetPoint and Current
Loo
models onl
Normal pressure display, near 0.0.
The display will begin countdown from
“0005” to “0000”.
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