Sierra Monitor Corporation Sentry 1200-26 - Manual (Page 2)

Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 (408) 262-6611 800-727-4377 FAX: (408) 262-9042
Visit our Web site at: www.sierramonitor.com E-Mail: [email protected]
© 2006 by Sierra Monitor Corporation Printed in U.S.A. Rev. A 5/23/06
ACCESSORIES
SAMPLE DRAW PRODUCTS
Sample draw products are used in applications in which the sensor
cannot be installed directly at the gas sensing location due to poor
accessibility or the harshness of the environment. Sample is con-
tinuously drawn from the sensing location to the sensor at a more
suitable location.
The primary component of the sample draw product is a venturi
manifold that uses a continuous flow of driver air to pull a slight vacuum
through the sample supply line drawing the sample into the manifold
cavity connected to the sensor.
5399-01 Sample Draw Fitting
The sample manifold assembly is the 5399-01 Sample Draw Fitting.
Sample stream draw and flow control is provided by the user.
5398-01 Sample Draw Assembly
The 5398-01 Sample Draw Assembly is a complete sample draw
assembly including the sample draw fitting, flow metering assembly,
plus the driver air, sample and exhaust fittings. This allows accurate
adjustment of sample flow using the signal flow meter located on the
flow metering assembly.
5398-02 Sample Draw/Dilution Assembly
For applications where the expected gas concentration is either higher
than maximum range of the sensor or sufficiently high to significantly
reduce sensor life with extended exposure, the 5398-02 Sample Draw/
Dilution Assembly is recommended. This assembly adds a second
flow meter for control of dilution air. Adjustment of sample and dilu-
tion air flow meters achieves the dilution ratio required. Concentra-
tions displayed on the sensor controller must then be multiplied by
the dilution factor to arrive at actual consecrations.
SENSOR MOUNTING PRODUCTS
5360-00 Calibration Gas Delivery Fitting
The Calibration Gas Delivery Fitting provides the ability to deliver the
gas to the sensor module in a remote location. A tube fitting enables
the operator to direct calibrations gas flow to the sensor at any time
desired.
5311-00 Rainshield
The Rainshield is mounted over the sensor head to protect the sen-
sor from direct exposure to rain, hosedown and other splashing liq-
uids.
5394-00 Duct Mount Fitting
The Duct Mount Fitting facilitates installation of the gas sensor mod-
ule onto an air duct. The fitting also includes the 5360-00 calibration
gas delivery fitting so that calibration gas can be delivered to the
sensor with out removing the module from the duct.
Gas Sensor Accessories
CALIBRATION ADAPTERS
The Sierra Monitor Gas sensor modules are designed for easy cali-
bration. The standard calibration adapter screws over the head of
sensor. Then calibration gas is fed through a tube connected onto
the adapter.
Most Sierra Monitor gas sensor modules are equipped with a mag-
netic switch to signal the sensor module that calibration is being per-
formed. The magnetic calibration adapter is used to control this
switch. When the adapter is attached to the sensor the switch closes
to indicate the tart of calibration. The sensor module will then hold
the present output until the magnetic calibration adapter is removed
signaling completion of calibration.
There are two calibration adapters available, the 5358-00 Magnetic
Calibration Adapter and the 5358-01 Standard (non-magnetic) Cali-
bration Adapter. The magnetic adapters are needed when the user
needs to hold the current value during calibration to avoid nuisance
alarms and the standard (non-magnetic) adapter if necessary dur-
ing global calibration.
5311-00
5394-00 5360-00
5398-01
5399-01
5398-02