Setra Systems SRIMV Operating instructions

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Setra Velocity Monitor
SRIMV
Installation and Operation Manual

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Table of Contents
1.0 Features and Intended Use
2.0 SRIMV Included parts
3.0 Installation
4.0 Menu Navigation and Configuration
5.0 Setting up the SRIMV menu

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1.0 FEATURES
The SRIMV is a multi-mode (air velocity, flow, pressure, temperature and humidity) monitor. It has a 3
color backlight display, a digital input for a door switch, 2 analog inputs for temperature and humidity,
1 relay output for remote alarm indication and an internal pressure sensor. It can display and alarm on
Velocity, Flow, Pressure, Temperature and Humidity parameters.
User Interface
•Large LCD 2 line display shows values of the monitored parameters
•Green (Normal), Yellow (Warning), Red (Alarm) Backlit display for indicating the status
•Membrane keypad for ease of configuration and menu navigation
•Password Protection for security
Audible Visual and Remote Alarms
•Color Backlight LEDs
•Alarm on Pressure, Velocity, Flow, Temperature and Humidity
•Audible Buzzer
•Alarm delay, mute timeout, alarm enable/disable, buzzer enable/disable
•SPDT Relay for remote alarms, including Setra Remote Annunciator (SRAN)
Ease of Installation and Calibration
•Flush mount (mounts flush to wall surface) and duct mount (surface mount) versions; both are
wipe-down compatible for decontamination
•Rotate-able pressure fittings to eliminate crimping of pressures hoses, allows installation
flexibility
•Snap on cover, no visible fasteners
•Modular plug-in design using sub-base. Simultaneous electrical and plumbing connections
reduce initial installation and calibration costs. Unit can be calibrated in house or sent for
calibration service without removing the wiring or plumbing
•Push button zero and span calibration, no potentiometer adjustments
•PG9 and Conduit fitting in same unit, field selectable
Versatile
•Field selectable outputs, 4-20 mA, 0-5 VDC or 0-10 VDC
•One unit that can be field configurable for almost all duct and room measurement applications

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2.0 SRIMV Included Parts
Fig. 2-1 Parts Provided
The SRIMV parts list includes:
•SRIMV Velocity Monitor
•Accessories: ordered separately
For Velocity and Flow measurement a Pitot tube, averaging probe or flow station is required as an input
to the pressure ports on the SRIMV. Setra offers the following averaging probe.
Averaging Flow sensor: Part # 242915-xx
The SRIMV can be used with any manufacturer’s probe. The “k” factor flow coefficient must be
entered into the SRIMV at commissioning. The default setting as shipped is K=1. K factor changes
based on probe length.
Installation
The 242915-xx units utilizes 1/4  ID, 3/8  OD tubing. First check that there are
no sharp bends in the tubing at any connection. Connect the “H” Port to the high input on the SRIMV
units. Connect the “L” Port to the low input on unit.

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Approximate K factors for models:
242915-01: 1.32
242915-02: 1.39
242915-03: 1.46
242915-04: 1.46
242915-05: 1.58
242915-06: 1.67
Mounting
1. Install the unit horizontally to ensure accurate readings for units ranging
from 3-5/32  to 9-29/32 . If using a unit longer than the 242915-05, which is 9-
29/32 , vertical mounting is recommended.
2. Determine the duct’s flow direction and install the model 2429150-xx based on
the unit’s flow arrow imprint.
3. Cut a 7/8  hole in the ducting to accept the unit; tip should be at least to the center of duct.
4. Attach using two self-tapping screws inserted in the 3/16  mounting hoes.
3.0 Installation
The SRIMV is available in two models suitable for wall (flush mount) and surface
mounting (panel mounting). The front panel of the product and the rear housing are snapped
together. The two snaps are located on the left and right sides of the front panel. A 1.5mm（1/16
inch）Allen wrench or paper clip can be used to open the concealed snap fastening system.
The rear housing can be used to mount to a wall or into a 3 gang “off the shelf” electrical box.
Conduit (1/2”) or a PG9 cable connection are available for wiring to the terminals at the rear of the
unit. The rear housing acts much like a thermostat sub-base that does not have to be removed once
installed.
The front bezel contains the pressure sensor, PCBAand display. It is a complete module that can
be calibrated. The pressure and electrical connectors are disconnected simultaneously when the
front bezel is removed.
Before installing, determine a good installation location. For flush mount applications, the corridor
outside the room is preferred. For surface mount applications the unit may be mounted on the duct
work (avoid high vibration), a stable surface near the ductwork or inside a panel.

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Fig 3-2 SRIMV Wall (Flush) mount housing rear
view of pressure fittings and electrical terminations
Unpack the product box. Do not remove the protective film on the front display screen until after
installation to prevent scratching of the display during the installation process. Remove parts and place
them on flat surface. Apply pressure on the side of the box to open the snap fit or use an Allen wrench
or paper clip as shown See Figure 1-2. First one side then the other, then pull the bezel forward to
remove it from the housing.
Fig 3-1 Wall (Flush) mount housing dimensions, front view

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Fig. 3-4 Removing bezel from the base
Plumbing and Wiring to the Electrical Box (Rough in)
Flush mounting:
Use a 3 gang electrical box RACO 697 or equivalent or mount directly into the wall. If mounting directly
into the wall create an opening approximately 2.8” (71 mm) by 5.4” (134 mm). If using the 3 gang box
use #6 machine screws to mount the ears of the SRIM rear housing to the electrical box. If mounting
directly into the wall without an electrical box, use drywall screws to mount the 4 ears of the SRIMV
box to the wall.
Fig. 3-5 Rough Plumbing and Wiring to Rough-in box, Flush Mount Unit

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Fig. 3-6 Wiring Diagram SRIMV

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Terminal Function
EXC 18-30 VDC, 24 +/- 20% VAC
COM Power Supply COM and Analog Out COM
VOUT Analog Output + (VDC mode) 0-5 VDC, 0-10 VDC
mA Analog Output (mA output mode) 4-20mA
D1 Door status, wire to one side of NO contact
D_COM Door status, wire to other side of NO contact
DI2 Not used
AN1 + output of temperature sensor (if used) 0-5, 1-5, 0-10 VDC
A_COM Common output of temperature and humidity sensors (if
used)
AN2 + output of humidity sensor (if used) 0-5, 1-5, 0-10 VDC
COM 15V Power Common (return)
+15VDC Power for remote annunciator (if used) 15 VDC, 50mA
RLY1 NO Relay 1 Normally open contact, 3A 120 VAC, 28 VAC,
resistive load
RLY1
COM Relay 1 Common contact
RLY1 NC Relay 1 Normally closed contact
RLY2 NO Not used
RLY2
COM Not used
RLY2 NC Not used
Table 1 Wiring SRIMV
Fig 3-7 Pressure ports and electrical terminals, SRIMV
Pull wires through the openings in the
bottom of the base. ½” Conduit or
PG9 fitting openings are provided.
Rotating pressure Fittings, can point
up or down, SRIMV only
+(High)
Pressure
- Pressure

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Figure 3-8 Wiring, SRIMV
Notes:
Relay 1 (RLY1) is a SPDT relay that can be used to signal a remote unit of an alarm condition. The
relay contacts are rated for 3 A, 120 VAC, 3A, 28VDC

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Fig. 3-9 Installed plugs on unused openings in the base.
Connect the pressure tubes to the high and low pressure ports. Wire to the electrical terminals on the back
of the housing. If desired, place electrical plugs on the unused holes in the base.
Complete the installation by installing the bezel onto the base by aligning the two and pushing the
bezel into the base until the bezel snaps to the base on the 2 sides. Be sure to carefully align the 2 parts
and push straight in. There are alignment features on the front bezel and rear housing.
4. 0 Menu Navigation and Configuration
The LCD display is standard on the SRIMV and the display provides valuable feedback during
configuration and for user feedback in the normal and alarm modes.
Apply 24 VDC or 24 VAC power.
Menu Flow Chart. The SRIMV flow chart is available on the setra.com web site to help with set up and
configuration. Use the QR code to get to setra.com.

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Display Parameters
Unit in the normal state, line 1 indicates differential pressure, velocity or flow and the corresponding
engineering units. Line 2 indicates the temperature and humidity reading, if enabled. The green
backlight indicates that the velocity (or pressure or flow), the temperature and humidity is within the
allowable alarm limits. Note that the alarm will occur if any of the 3 monitored parameters are outside
of their respective limits.
Unit shown in alarm state. There will be a red backlight with an arrow indicating which parameter is in
alarm and if it is above or below alarm limits. The audible buzzer will also be active if it has been
enabled.

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Menu Operation
Menu key – Provides access to the menu structure
Down arrow key – Allows selection of numerical parameters. Pushing the down arrow causes the digits
to move upwards in a 1 digit count and will wrap around. The cursor below the indicated item in the
current menu item indicates that this is the digit that is being changed. If you don’t need to make a
change to that position press the enter key to move to the next position to the right.
Enter key – Use this key to move left to right in a current menu screen. It is also used to save the
current menu items selected settings, or to confirm the current menu operation. Press the Enter key to
save the current settings; the display will show the current setting value and flash twice, and prompt the
user that the value currently set has been saved. There is no “back” button, so if the user proceeds past
the desire parameter they must go back to the start of that menu screen.
Return/Silence button – This button provides a quick way to return to the home screen from anywhere
within the menu structure. It has the secondary purpose of temporarily silencing the audible alarm. If
the mute timeout setting is reached the audible alarm will again sound.
Menu Screens
1. Common Configuration
Menu Setup
Runs through the setup screens to set all
parameters to desired set points. Below are all of
the parameters that must be selected.
Engineering Units
User selectable for either English or Metric
units. Choose “enter” to activate the engineering
units menu. The engineering units will flash and
then press the “down arrow” to select desired
units. Press “enter” to select.
Output Mode
User selectable output mode: 0-5V, 0-10V or 4-
20mA. Choose “enter” to activate the output
mode menu. The output mode will flash and then
press the “down arrow” to select desired mode.
Press “enter” to select.

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Velocity, Flow, Pressure, ACH Selection
User Selectable for Velocity, Flow, Pressure or
Air Changes per Hour. Whichever option is
chosen in this menu will be shown as the default
in the secondary menu under the
V/Flow/Pressure section. Choose “enter” to
activate the V/Flow/Press menu. The menu will
flash and then press the “down arrow” to select
desired mode. Press “enter” to select.
Alarm Delay
Set the desired time for Alarm Delay. Choose
“enter” to activate the Alarm Delay menu. The
menu will flash, then press the “down arrow” to
select correct digit: “enter” moves to next digit.
Mute Timeout
Sets the desired amount of time to engage Mute
Timeout. Choose “enter” to activate the Mute
timeout menu. The menu will flash, then press
the “down arrow” to select correct digit: “enter
moves to next digit.
Buzzer Enable
Enables or disables the audible buzzer alarm.
Choose “enter” to activate the Buzzer Enable
menu. The menu will flash, then press the “down
arrow” to select enable or disable. Press “enter”
to select.
Door Switch
Door switch enable/disable. Enable if used with
a door switch to detect if door is open.

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Password Enable
Enables or disables the 4 digit numeric
password.
Filter Setting
(0-99) is the filter setting.This is the number of
samples used to take an average; it is a weighted
rolling average, so the higher the number the
more filtering is done to smooth out the output
and display readings. Thus, for turbulent flows it
is recommended to use a higher filter number. For
faster response you would use smaller setting.
2. V/Flow/Pressure/ACH
If Velocity is chosen:
After choosing to display and monitor Velocity
from the Common Configure section, set the
parameters for that output.
K Factor
The K factor is provided by the manufacturer of
the static pressure probe or Pitot tube
Barometric Pressure
Set current barometric pressure conditions. This
can either be entered manually or it will be set to
the standard default of 29.92 in Hg. Barometric
Pressure effects the flow rate due to changes in
air density. Choose “enter” to activate the
Barometric Pressure menu. The menu will flash,
then press the “down arrow” to select desired
digit. Press “enter” to select and move to next
digit.

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Temperature Source
Choose between an analog sensor input (from
external sensor) or “set-up”. The sensor input
comes from the external sensor, whereas the
“set-up” option is added manually if there is no
temperature sensor used. Temp is used to
calculate air density; Default is 70 degrees
Fahrenheit or 21.1 degrees Celsius. Choose
“enter” to activate the Temp Source menu. The
menu will flash, then press the “down arrow” to
select desired temp source. Press “enter” to
select.
Enter Temperature
If Temp Source “set up” is chosen, manually
enter the temperature. Choose “enter” to activate
the Enter Temp menu. The menu will flash, then
press the “down arrow” to select desired digit.
Press “enter” to select and move to next digit.
Zero Calibration
“Tares” out any Zero pressure error. This must
be done with Zero pressure applied to the unit.
Velocity Alarm High Limit
Sets the alarm for the high side velocity limit.
Choose “enter” to activate the V Alarm H Limit
menu. The menu will flash, then press the “down
arrow” to select desired digit. Press “enter” to
select and move to next digit.

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Velocity Alarm Low Limit
Sets the alarm for the low side velocity limit.
Choose “enter” to activate the V Alarm L Limit
menu. The menu will flash, then press the “down
arrow” to select desired digit. Press “enter” to
select and move to next digit.
Velocity Alarm Enable
Enables or disables the velocity Alarm. Choose
“enter” to activate the V Alarm menu. The menu
will flash, then press the “down arrow” to select
desired mode. Press “enter” to select.
Velocity Range
Sets velocity range in either ft/min or m/s.
Choose “enter” to activate the Velocity Range
menu. The menu will flash, then press the “down
arrow” to select desired units. Press “enter” to
select.
If Flow is chosen:
After choosing to display and monitor flow from
the Common Configure section, set the
parameters for that output.
K Factor
The K factor is provided by the manufacturer of
the static pressure probe or Pitot tube and varies
by probe length.

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Barometric Pressure
Set current barometric pressure conditions. This
can either be entered manually or it will be set to
the standard default of 29.92 in Hg. Barometric
Pressure effects the flow rate due to changes in
air density. Choose “enter” to activate the
Barometric Pressure menu. The menu will flash,
then press the “down arrow” to select desired
digit. Press “enter” to select and move to next
digit.
Temperature Source
Choose between an analog sensor input (from
external sensor) or “set-up”. The sensor input
comes from the external sensor, whereas the
“set-up” option is added manually if there is no
temperature sensor used. Temp is used to
calculate air density; Default is 70 degrees
Fahrenheit or 21.1 degrees Celsius. Choose
“enter” to activate the Temp Source menu. The
menu will flash, then press the “down arrow” to
select desired temp source. Press “enter” to
select.
Enter Temperature
If Temp Source “set up” is chosen, manually
enter the temperature. Choose “enter” to activate
the Enter Temp menu. The menu will flash, then
press the “down arrow” to select desired digit.
Press “enter” to select and move to next digit.
Zero Calibration
“Tares” out any Zero pressure error. This must
be done with Zero pressure applied to the unit.

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Duct Area
Manually enter the area of the duct where the
probe is mounted. The ducts area is necessary
for calculating the flow rate. The menu will
flash, then press the “down arrow” to select
desired digit. Press “enter” to select and move to
next digit.
Flow Alarm High Limit
Sets the alarm for the high side flow limit.
Choose “enter” to activate the F Alarm H Limit
menu. The menu will flash, then press the “down
arrow” to select desired digit. Press “enter” to
select and move to next digit.
Flow Alarm Low Limit
Sets the alarm for the low side flow limit.
Choose “enter” to activate the F Alarm L Limit
menu. The menu will flash, then press the “down
arrow” to select desired digit. Press “enter” to
select and move to next digit.
Flow Alarm Enable
Enables or disables the flow Alarm. Choose
“enter” to activate the F Alarm Enable menu.
The menu will flash, then press the “down
arrow” to select desired mode. Press “enter” to
select.
If Pressure is chosen:
After choosing to display and monitor pressure
from the Common Configure section, set the
parameters for that output.
Pressure Alarm High Limit
Sets the alarm for the high side pressure limit.
Choose “enter” to activate the P Alarm H Limit
menu. The menu will flash, then press the “down
arrow” to select desired digit. Press “enter” to
select and move to next digit.