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30-0951RK-02, 30-0951RK-HS-02,
30-0951RK-OC-02, and 30-0951RK-IR-02
Flow Through Adapters
Part Number: 71-0296RK
Revision: P1
Released: 10/31/13
www.rkiinstruments.com
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Description
The attached detector head operator’s manual can be used in conjunction with this
supplement for the 30-0951RK-02, 30-0951RK-HS-02, 30-0951RK-OC-02, or the
30-0951RK-IR-02 flow through adapter. The flow through adapter includes a flowmeter, a
sensor adapter, and a sensor chamber with two com pression fi ttings. A sensor adapter
gasket seals to the 1/2” NPT combustible sensor when installed. A sensor adapter O-ring
seals to all other types of detectors whe n installed. This O-ring is different for different
types of detectors. A detector chamber O-ring seals the sensor chamber to the sensor
adapter. This O-ring is the same for all versions. A flowmeter is installed in the inlet line.
The flowmeter allows you to view the flow rate through the flow through adapter but
does not let you adjust the flow.
Calibration instructions are the same as those outlined in the attached detector head
manual with the exception that the calibration gas must be conn ected either to th e inlet
fitting tubing or to the pump inlet (if the flow through adapter is on the pressure side of
the pump) as opposed to a calibration cup. Insta llation instructions are slightly different
and are outlined below.
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Installation
r
ScrewOntoS ensor
r
Quick Connect
Sensor Adapte
O-Ring
Sensor
Chamber
O-Ring
Sensor Adapte
Sensor
Chamber
Fitting
Thumbscrew,
3x
8.0 max
1/4 inch OD
Tube Sample
Exhaust Fitt ing
Flowmeter
1/4inchOD
Tube
Sample Inlet
Fitting
5.3 max
Figure 1: Outline and Mounting Dimensions/Component Location
1. The flow through adapter is normally shipped uninstalled from the detector and the
flowmeter is separated from the sensor adapter. Insert the fitting at the top of the
flowmeter into the quick connect fitting connected to the sensor a d apter. Screw the
flow through adapter onto the detector, tightening firmly by hand.
CAUTION: Make sure the flow through adapter is installed tightly and after installation is
complete, verify that the flow through adapter is still tightened firmly onto the
detector to avoid possible leaks.
2. If necessary, re-orient the sensor chamber so the fitting from the sensor chamber to the
flowmeter does not hit the mounting surface by unscrewing the three thumbscrews,
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rotating the sensor chamber, and tightening the three thumbscrews.
3. Install and startup the detector head as described in the detector head operator’s
manual. Make sure there is sufficient room between the detector and the mounting
surface for the flow through adapter.
4. The inlet and exhaust fittings accept 1/4” OD rigid metal tubing such as copper,
aluminum, or stainless steel. The inlet fitting is located at the bottom of the flowmeter
and the exhaust fitting is located on the bottom of the sensor chamber. Insert the
desired length of tubing into each fitting and tighten the fittings so that the ferrules
crimp onto the tubing.
5. Install appropriate device(s) (pump , aspirator, etc.) to dra w sample to th e detector.
The ideal flow rate for the flow through adapter is 3.0 SCFH.
NOTE: Be sure to use the inlet and exhaust ports as intended to ensure correct sensor
response and to allow any accumulated liquid to drain out the bottom of the flow
through adapter.
6. Calibrate the detector head as described in the attached manual and in the next
section.
NOTE: Calibrate the detector head with the flow through adapter installed to ensu re an
accurate reading.
Calibration
A demand flow regulator should be used for calibration.
1. Follow the calibration instructions outlined in the attached detector head manual.
2. When the instructions call for applying gas, connect the cylinder.
• If you are drawing sample through the system, connect the cylinder to the inlet
fitting on the flowmeter.
• If you are pushing sample through the system, connect the cylinder to the pump
inlet.
3. Perform a calibration as outlined in the attached detector head manual.
4. When the instructions call for removing the gas, disconnect the cylinder.
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Parts List
Part Number Description
See the table below for spare parts not listed in the attached detector manual.
Table 1: Parts List
07-0107RK Gasket, 0.75 OD x 0.58 ID x 0.093 thick, for 1/2” NPT combustible
sensor adapter
07-7120RK O-ring, 0.987 ID x .103, buna, for O
07-7218RK O-ring, 0.734 x .139, buna, for IR and H
/CO sensor adapter
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S sensor adapters
2
07-7225RK O-ring, 1.243 ID x .139, buna, for sensor chamber
13-1070RK Captive panel screw, 10-32 x 1.75
81-1054RK R e gulator, demand flow, for 58- and 103-liter calibration cylinders
81-1055RK Re gulator, demand flow, for 17- and 34-liter calibration cylinders
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