Series RPME Room Pressure Monitor
1/8 FEMALE
NPT
SURFACE MOUNTING
Specications - Installation and Operating Instructions
NPT HIGH PRESSURE
1/2 [12.70]
1-9/32
[32.54]
11/16
1/8 FEMALE
LOW PRESSURE
CONNECTION
[17.46]
CONNECTION
11/16
[17.46]
30Ø
1-3/4
[44.45]
1/2
[12.70]
[3]Ø3/16 [4.77] HOLES EQUALLY
SPACED ON A 4-1/8 [104.78] B.C.
1/8 FEMALE
NPT HIGH PRESSURE
CONNECTION
1.250
[31.75]
1/8 FEMALE
NPT LOW PRESSURE
CONNECTION
2-1/16
[52.39]
2
[50.80]
2-1/2
[63.50]
4-31/64
[113.79]
1/8 [3.18]
Bulletin P-RPME
4-47/64
[120.14]
Ø4 [101.60]
FACE
The Series RPME Room Pressure Monitor is designed for low differential pressure
applications that require stringent pressure monitoring and alarming. The Series RPME
can be congured to monitor positive or negative pressure in protected environments
and clean manufacturing areas. The RPME is a complete system with a xed segment
LCD which enables access to pressure, security, calibration, and alarm setup. The
RPME room pressure monitor has a brushed stainless steel bezel that allows for easy
cleaning.
The RPME room pressure monitor has built-in status indication LEDs that will appear
green when within the user-dened pressure set range and will appear orange when
outside of the pressure set range. 2 SPDT independent control relays with adjustable
deadbands are also provided along with a 4-20 mA process output.
FEATURES/BENEFITS
• 2 SPDT relays allow for capability of local alarming and alarming to control system
• Automatic or manual alarm reset
• Visual LED alarms provide immediate local alert allowing corrective action to be
taken quicker to eliminate the problem from becoming widespread
• Stores peak and valley process readings
• Same installation diameter as Magnehelic
RPME room pressure monitor
• Password protected setup menu ensures no errors by untrained personnel
INSTALLATION LOCATION: Select a clean, dry location free from shock and vibration
where temperature limits will not be exceeded. Distance from the transmitter to the
receiver is limited only by total loop resistance. See ELECTRICAL CONNECTIONS.
Tubing feeding pressure to the instrument can be practically any length required, but
long lengths will increase response time slightly.
POSITION: All standard models are calibrated for use in a vertical mounting position.
Standard models will perform properly at other angles but should be spanned and
zeroed in the position in which they will be used. WARM-UP: It is recommended to
power up the RPME room pressure monitor and allow a 1-hour warm-up period before
taking measurements. This will stabilize the measurements and provide the best
accuracy.
®
gage which simplies eld upgrade to
SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Measurement Technology: Piezoresistive.
Wetted Materials: Consult factory.
Housing Material: Die cast aluminum case and SS bezel.
Accuracy: ±0.5% RSS (includes non-linearity: ±0.49%, hysteresis: ±0.05% and
non-repeatability: ±0.05%), or ±1% RSS (includes non-linearity: ±0.99%, hysteresis:
±0.05% and non-repeatability: ±0.05%).
Pressure Limits: Ranges 0.5 and 1.0 in w.c: 9 psi; Ranges 2.5 and 5 in w.c.: 1.5
psi.
Compensated Temperature Limits: 32 to 140°F (0 to 60°C).
Thermal Effects: 0.030%/°F (0.050/°C) from 77°F (25°C).
Power Requirements: 12-28 VDC, 12-28 VAC 50 to 400 Hz.
Power Consumption: 3 VA max.
Output Signal: 4-20 mA DC into 900 Ω max.
Zero and Span Adjustments: Accessible via menus.
Response Time: 8 ms.
Display: Backlit 4 digit LCD 0.4˝ height LED indicators for set point and alarm
status.
Electrical Connections: 15 pin male high density D-sub connection. 18˝ (46 cm)
cable with 10 conductors included.
Process Connections: 1/8˝ female NPT. Side or back connections.
Mounting Orientation: Mount unit in vertical plane. Size: 4-3/4˝ (120.7 mm) OD x
2-21/32 (67.5 mm).
Weight: 1.75 lb (794 g).
SWITCH SPECIFICATIONS
Switch Type: 2 SPDT relays.
Electrical Rating: 1 A @ 30 VAC/VDC.
Set Point Adjustment: Adjustable via keypad on face.
PRESSURE CONNECTIONS: For installation convenience two sets of 1/8˝ female
NPT pressure ports are supplied. Be sure to seal the unused ports with pipe plugs
included.
Positive Pressure - Connect tubing to HIGH PRESSURE port and vent LOW
PRESSURE port to atmosphere.
Negative (Vacuum) Pressure - Connect tubing to LOW PRESSURE port and
vent HIGH PRESSURE port to atmosphere. (When operating this device in a dusty
environment, install an optional A-331 Filter Vent Plug in the vented port to keep
interior clean.)
Differential Pressure - Connect tubing from the higher source to HIGH PRESSURE
port and from the lower source to LOW PRESSURE port.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219-879-8000
Fax: 219-872-9057
www.dwyer-inst.com
e-mail: info@dwyermail.com
MOUNTING: The RPME room pressure monitor may be either panel (ush) mounted
[3] Ø3/16 [4.77] HOLES
LOW PRESSURE CONNECTION
HIGH PRESSURE CONNECTION
INWC
1.000
SP1
SP2
ALHI
ALLO
SP/AL
RST
MENU
E
X1K
FRONT PANEL
SOME VELOCITY
SP/AL
MENU
EE
RST
or surface mounted.
1-1/2
3/4
[19.05]
1-3/32
[27.78]
[38.1]
5/16
[7.94]
11/16
[17.46]
Ø1/2 [12.70] HOLE FOR
1/2
[12.70]
1-3/4
[44.45]
EQUALLY SPACED ON
A 4-1/8 [104.78] B.C.
Ø1/2 [12.70] HOLE FOR
Figure A
Panel Mounting - Provide 4-9/16˝ (115.9 mm) OD opening in panel. Insert gage and
secure with supplied mounting hardware.
WIRING: The RPME room pressure monitor uses a standard 15 pin male high density
D-Sub connector available from most electronic distributors. A pre-wired 18˝ cable is
included with each unit. See below table for cable color wiring information.
15 PIN
Function
12-24 VAC/VDC Power
12-24 VAC/VDC Power
4-20 mA XMTR Output 4-20 mA XMTR Output +
SP1 Relay N/O
SP1 Relay Com
SP1 RELAY N/C
SP2 or Alarm Relay N/O
SP2 or Alarm Relay Com
SP2 or Alarm Relay N/C
Connector
Terminal
1
6
2
11
12
13
14
15
10
5
Cable
Color
Brown
Yellow
Black
Red
Vilolet
Grey
White
Blue
Green
Orange
NOTES:
1. If 12-24 VDC power is used, the polarity is unimportant.
2. Wire in accordance with an equivalent national standard or code. Use copper
conductors only rated for 60°C.
3. All terminals are rated CLASS 2.
4. ISOLATION: All inputs and outputs to each other: 500 VAC.
5. 4-20 mA Transmitter – Check the specications for the device receiving this signal
for input resistance. Typical 250 to 600 Ω, 600 Ω maximum.
SP2 DESCRIPTOR
SP1 DESCRIPTOR
MULTIPLIER
DESCRIPTOR
VISABLE WITH
AND FLOW
RANGES
X1K
SP2
SP1
ALHI
ALLO
INWC
ALARM
DESCRIPTOR
UNITS
INPUT VALUE
1.000
MENU
SP/AL
E
RST
Surface Mounting - Drill (3) 3/16˝ (4.76 mm) diameter holes for mounting and cut a
9/16˝ x 1-1/2˝ (14.3 x 38.1 mm) opening for access to terminal block as indicated in
Figure B. If rear pressure connections are to be used, also provide 1/2˝ diameter holes
as shown in Figure A and Figure C. Insert 6-32 machine screws from rear of mounting
surface, thread into tapped holes on back of transmitter and tighten.
Figure B
Figure C
KEY FUNCTIONS
Keys Home Position Function Main Menu Function Sub Menu Function
Sequences the display
SP/AL
through SET POINT and
SP/AL
ALARM settings
Allows access to the
MENU
menus
MENU
UP
Return to home
position
Return to home
position
Sequences through
menus
Return to home
position
Return to previous
menu
Increments a value
ARROW
DOWN
Sequences through
menus
Decrements a value
ARROW
Displays full-scale
range of unit
ENTER
Enter into
SUB MENU
Changes a value or
setting. Press
ENTER and display
will blink. Adjust with
UP or DOWN arrows.
Press ENTER to
store. Display will
stop blinking.
RST
RESET
Clears or resets an Alarm
(alarm set for manual
reset)
Peak/Valley SUB
MENU resets display
to present value.
LED and Display Behavior - The RPME room pressure monitor is designed to
CONTROL MODE
CONTROL MODE
CONTROL MODE
E
TIME
1.0
PRESSURE
provide the room pressure status of the room being monitored to personnel with visual
indication of the LED status lights and backlit 4 digit LCD. All LED on the front of the
RPME are dened by the alarm setpoints in “AL (Alarm Type) SUB MENU”.
The desired measurement should be between ALLO and ALHI settings, which would
equate to SP1 and SP2 LEDs lighting up a green color. If the measurement is below
ALLO or above ALHI, the corresponding LED will blink an orange color and the 4 digit
LCD will ash the number segments. Please refer to the table below for the operation
and LED functions.
Menu Map
SETTINGSMAIN MENUS SUB MENUS
LED Light
SP1 LED Light
SP2 LED Light
ALLO LED Light
ALHI LED Light
4 Digit LCD
Reading below
ALLO
LED OFF
LED OFF
Blink, Orange
LED OFF
Flash Segments
Reading between
ALLO to ALHI
LED ON, Solid Green
Reading below ALLO
LED OFF
LED OFF
Normal, Solid Segments
Reading above
ALHI
LED OFF
LED OFF
LED OFF
Blink, Orange
Flash Segments
SETTING SET POINTS AND ALARMS
SP/AL
The
hot key provides direct access to the Set Point and Alarm MENU. The
Set Point and Alarm MENUS that are displayed are based upon the Control (CtrL)
SUB MENU.
SP/AL SP/AL
SP/AL SP/AL
SP/AL SP/AL
SP/AL
SP/AL
SP/AL
SP/AL
SP/AL
Visible when
SP/AL
SP/AL
Visible when
Visible when
mode =
mode =
mode =
MENU
SET POINT ADJUSTMENT
Adjusting the RPME Set Points is quick and simple. Instead of setting a set point and
deadband, simply adjust
adjust
In the above graph, an instrument with a 1.0˝ range would have the SP1 relay turn
on at 0.8˝ and off at 0.4˝.
turn off point. The relays outputs normally function in the direct acting mode, which
means the relays turn on with an increase in pressure. SP1 may be congured to act
as a reverse acting relay (refer to the 1SP SUB MENU setting, page 15). When set
for reverse acting,
ON point. SP2 is always direct acting.
SP1L
or
[IN. W.C.]
SP1H
or
SP2H
SP2L
for the desired relay turn off point.
for the desired relay turn on point, and then
0.8
0.6
0.4
0.2
0
0
SP1H
sets the relay turn on point, and
SP1H
sets the relay turn OFF point, and
SP1L
sets the relay
SP1L
sets the relay turn
CONTINUED
SETTINGSSETTINGS
MAIN MENUS SUB MENUS
E
Main Menu Selections (Upper Right Display Reads
SECr
Security - Lock out access to Set Point and Alarm settings, or lock out access
to all settings.
OPEr
Operation - Selection of Pressure engineering units.
OUt
Output - Select a Single Set Point, 2 Set Points, or a Set Point and an Alarm
mode of operation.
d.S
Display - Monitor and adjust display related settings: Peak, Valley, display
resolution, % output and dampening.
AdU
Advanced functions - Modify advanced function parameters, transmitter
output scaling, Maintenance Set Point settings and calibration.
MAIN MENUS and SUB MENUS
SECr
(Security) MAIN MENU
SECr
is the only SUB MENU in the security MENU. When the security SUB MENU
is selected, the present security level is displayed in the upper right hand
display. To change the security level, adjust the number displayed to the
number shown in the following table for the desired security level.
MENU
)
CONTINUED
MENUS PRESENT ONLY
IN PRESSURE OPERATION
Security Level
Displayed Access
1
2
3
4
OPEr
Operation MAIN MENU
The
OPEr
PrES
(Pressure) SUB MENU
For pressure measurement, the following units are available:
INWC
- Inches of water column
MMWC
- Millimeters of water column
MBAR
- Millibar
PA
- Pascal
INWC MMWC MBAR PA
0.1000
0.2500
0.5000
1.000
2.500
Table 1 - Pressure Range vs. Available Units
Note:
OVFL
exceeded above or below full-scale by 2%.
All menus access
Menu Access
SP/AL Locked
SP/AL Access
Menus Locked
All settings locked
MENU veries the measurement type of the instrument,
2.540
6.350
12.70
25.40
63.50
(over ow) or UnFL (under ow) will appear when the ranges have been
0.2491
0.6227
1.245
2.491
6.227
Password
Value to Enter
10
70
90
111
24.91
62.27
124.5
249.1
622.7
PrES
- Pressure.
MENU
CtrL
DIRECT ACTING
REVERSE ACTING
(Control) SUB MENU
1SP
- Single set point
2SP
- Two fully independent set points
SPAL
- Single set point and alarm
1SP
(SP1 Reverse or Direct Acting) SUB MENU
The following alarm function SUB MENUS are activated when
AL
(Alarm Type) SUB MENU
HI
- High alarm
LO
- Low alarm
HILO
- For a high/low guardband type alarm
CtrL
is set to
SPAL
:
DIR
- Direct. Relay turns on with increasing pressure
REV
- Reverse. Relay turns on with decreasing pressure
100
PROCESS
0
RELAY INACTIVE
RELAY ACTIVE
100
SPH
TIME
SPL
SPH
ALARM ADJUSTMENT
Alarm settings are dependent upon the selected alarm mode. The RPME differential
pressure controller alarm may be congured as a High Alarm, Low Alarm, or High/Low
Alarm. Alarm settings are all absolute and may be set to anywhere within the range of
the instrument. The dead bands of the alarms are xed at 1% of full-scale.
HIGH ALARM FUNCTION
MIN. PRESSURE
MIN. PRESSURE
Relay ON Relay OFF
MIN. PRESSURE
Relay ON Relay OFF Relay ON
ALLO
ALLO
Relay OFF Relay ON
ALHI
MAX. PRESSURE
LOW ALARM FUNCTION
MAX. PRESSURE
ALHI
HIGH/LOW ALARM
FUNCTION
MAX. PRESSURE
PROCESS
0
RELAY INACTIVE
RELAY ACTIVE
SPL
TIME
AL0S
(Alarm Output State) SUB MENU
CL0S
- Alarm relay contacts close upon alarm condition
0PEN
- Alarm relay contacts open upon alarm condition
Pd.S
(Process Display) SUB MENU
STD
- Display reads pressure, velocity, or ow values
PCT
- Display reads % of full-scale value
ALrE
(Alarm Reset) SUB MENU
ONOF
- Automatic reset
HOLD
- Manual reset. An alarm is reset by the RESET key on the front panel.
AL.H
(Low Alarm Inhibit) SUB MENU
ON
- Alarm inhibit is on
OFF
- Alarm inhibit is off
If
AL.H
the process value passes through the alarm set point once.
ALDL
Sets the amount of time an alarm condition must be continuously met before the
alarm condition is recognized. The alarm delay is adjustable from 0-3600 seconds.
d.S
PEAK
The Peak feature stores the highest pressure reading the instrument has measured
since the last reset or power up. At power up
reading. To manually reset the
VALy
is selected ON, a low alarm condition is suspended upon power up until
(Alarm Delay) SUB MENU
(Display) MAIN MENU
PEAK
- Peak value
VALy
- Valley value
ZERO
- Zero
(Peak) SUB MENU
PEAK
SUB MENU.
(Valley) SUB MENU
Pd.S
rESO
- Process display
- Resolution
DAMP
- Dampening level
PEAK
value, press the RESET key while in the
PEAK
is reset to the present pressure
When the display is reading percent,
display. The percent display is only available in pressure operation.
DAMP
(Dampening) SUB MENU
Adjust from 1-16
Dampening stabilizes the display from instabilities due to things such as vibration
and excessive pressure uctuations. The dampening setting adjusts the amount of
readings that are averaged for each display update. Adjust the dampening value until
the display reads a stable value for the application.
AdU
(Advanced) MAIN MENU
POL
- Process output low
POH
- Process output high
MSP1
- Maintenance set point 1
MSP2
- Maintenance set point 2
POL
and
POH
(Process Output Low and High) SUB MENUS
Process output low and high are used to scale the 4-20 mA output. Set
desired display reading for 4 mA output, and set
for 20 mA output.
minimum scale up to
scale.
MSP1
and
Adjust for the desired maintenance set points when the unit is placed in the
maintenance mode. The deadband is xed at 2% of full-scale. To enter or leave the
maintenance mode, press and hold the for 8 seconds.
POH
must be higher than
POH. POH
MSP2
(Maintenance Set Point 1 and 2) SUB MENUS
PCT
is displayed in the upper right of the
ZERO
SPAN
POH
POL. POL
may be adjusted from
- Zero calibration
- Span calibration
POL
to the desired display reading
may be adjusted 2% BELOW
POL
to 2% ABOVE maximum
to the
The valley feature stores the lowest pressure reading the instrument has measured
since the last reset or power up. At power up
reading. To manually reset the
VALy
SUB MENU.
rESO
(Resolution) SUB MENU
The RPME room pressure monitor is capable of displaying four digits of resolution.
However, at very low pressures the instability of the pressure may cause uctuations
in the least signicant digit causing the least signicant digit to be of little value.
Three digit resolution (
right of a decimal.
3DIG
- Set display for 3 digit resolution
4DIG
- Set display for 4 digit resolution
VALy
3DIG
) can only be active when there is at least one digit to the
VALy
value, press the RESET key while in the
is reset to the present pressure
ZERO
and
SPAN
(Calibration of Zero and Span) SUB MENUS
The lower display reads
ZERO
Calibration
Note: For accurate calibration, do not apply any pressure when performing this
function.
With the display reading ZERO, press the ENTER key. The upper display will blink.
Press ENTER again to complete the zeroing of the instrument or press the MENU
key to cancel.
SPAN
Calibration
With the display set to
key. The upper display will blink. Press ENTER again to complete the calibration or
press the MENU key to cancel.
MAINTENANCE/REPAIR
Upon nal installation of the Series RPME, no routine maintenance is required. The
Series RPME is not eld serviceable and is not possible to repair the unit. Field repair
should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact
customer service to receive a Return Materials Authorization number before shipping
the product back for repair. Be sure to include a brief description of the problem plus
any additional application notes.
CAL
in this mode.
SPAN
, apply full-scale pressure to the unit. Press the ENTER
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Printed in U.S.A. 12/20 FR# 444584-00 Rev. 2©Copyright 2020 Dwyer Instruments, Inc.
Phone: 219-879-8000
Fax: 219-872-9057
www.dwyer-inst.com
e-mail: info@dwyermail.com
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