Setra Systems SRIM1, SRIM2 Operating Instructions Manual
SRIM
Operating Instructions
Setra Systems, Inc.
159 Swanson Road, Boxborough, MA 01719
800.257.3872 • www.setra.com
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Table of Contents
1.0 Introduction .................................................................................................................... 3
1.1 Intended use .............................................................................................................. 4
2.0 Mechanical installation ................................................................................................ 4
3.0 Electrical installation ..................................................................................................... 5
3.1 Plumbing and wiring to the electrical box (rough in) .............................................. 6
4.0 Operation ...................................................................................................................... 10
5.0 Calibration and adjustment of zero output .................................................................20
6.0 Maintenance & troubleshooting .................................................................................. 20
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1.0 Introduction
The SRIM1 has a non backlit LCD display and alarms on pressure. It is capable of true 2 wire
4-20 mA loop powered operation. The SRIM2 is a 3 wire has a 3 color backlight, a digital input
for a door switch, 2 analog inputs for temperature and humidity and 1 relay output for remote
alarm indication. It can alarm on Pressure, temperature and humidity parameters.
Monitor room parameters
• Room pressure
• Temperature
• Humidity
• Door status (open or closed)
User interface
• Large LCD 2 line display, room pressure, temperature (optional) and humidity (optional) as
well as room status indication.
• Green (normal), yellow (warning), red (alarm) backlit display for indicating the room status
for SRIM2, monochrome for SRIM1.
• Membrane keypad for ease of conguration and menu navigation.
• Password protection for security.
Audible visual and remote alarms
• Color backlight LEDs.
• Alarm on pressure, 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 use and calibration
• Flush mount and duct mount versions, both wipe down for decontamination.
• Rotate-able pressure ttings 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 to
calibration service without removing the wiring or plumbing.
• Push button zero and span calibration, no potentiometer adjustments.
• PG9 and conduit tting in same unit, eld selectable.
Versatile
• Field selectable outputs, 4-20 ma. 0-5 VDC and 0-VDC
• Unidirectional or bidirectional ranges, eld selectable
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1. 1 Intended use
The Setra SRIM Room Isolation Pressure Monitor is designed for critical low differential
pressure applications that require stringent pressure monitoring and alarming. The SRIM can
be congured to monitor positive, negative or neutral pressures in protected environments.
The SRIM is a complete system that includes a 2 line LCD display with large characters for
the pressure, temperature and humidity indication and room status. The membrane keypad
user interface enables access to setup, security, calibration, and alarm setups. Backlight
LED’s (SRIM2) provide a local visual indication of the room pressure alarm status and a local
audible alarm (with time delay feature) alert personnel to system status. Analog outputs are
available in 4-20 mA, 0-5 or 0-10 VDC in the same unit. True differential pressure is displayed
with a resolution of up to .0001” as well as the room status. Setra’s patented very low pressure
capacitance sensor is dead ended and avoids the potential for cross contamination of the room
and reference space as well as eliminating drift that results from fouling of flow based sensors,
which by nature have a flow path connecting the protected and reference spaces.
2.0 SRIM included parts
The SRIM parts list includes:
• SRIM isolation room monitor
• Electrical plugs for ½” conduit or PG9 strain relief connector.
• RPS pressure taps 0, 1 or 2 as ordered, including mounting screws.
The RPS is mounted to a single gang box. One is typically located in the isolation room and the
second is mounted in a corridor (reference pressure). The back of the RPS has a barbed tting
for plastic tubing to be connected to the SRIM.
Fig. 2-1 Parts
Fig. 2-2 RPS pressure taps
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Fig. 3-1 Wall (flush) mount housing dimensions, front view, SRIM1,2
Fig. 3-2 SRIM2 wall (flush) mount housing rear view of pressure ttings
and electrical terminations.
3.0 Installation
The SRIM is available in two models suitable for wall (flush mount) and surface mounting (or
panel mounting). The front panel of the product and product 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 sub-base that does not have to be removed once
installed.
The front bezel contains the pressure sensor, PCBA and 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 isolation 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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Unpack the product box. Do not remove the protective lm on the front panel 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 t 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. 3-3 Removing bezel from the base
Fig. 3-4 Rough plumbing and wiring to rough-in box, flush mount unit
3.1 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 SRIM box to the wall.
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