RKI Instruments RP-6 User manual

RKI Instruments, Inc. 1855 Whipple Road Hayward, CA 94544
Phone: [phone] Fax: [phone]
RP-6 Pump for the GX-2001
Operator’s Manual
Part Number: 71-0068RK
Edition: First, Revision P0
Released: 9/25/02

• 2 RP-6 Pump for the GX-2001
Product Warranty
RKI Instruments, Inc., warranties gas alarm equipment sold by
us to be free from defects in materials, workmanship, and
performance for a period of one year from date of shipment
from RKI Instruments, Inc. Any parts found defective within
that period will be repaired or replaced, at our option, free of
charge. This warranty does not apply to those items which by
their nature are subject to deterioration or consumption in
normal service, and which must be cleaned, repaired, or
replaced on a routine basis. Examples of such items are:
Warranty is voided by abuse including mechanical damage,
alteration, rough handling, or repair procedures not in
accordance with the operator’s manual. This warranty indicates
the full extent of our liability, and we are not responsible for
removal or replacement costs, local repair costs, transportation
costs, or contingent expenses incurred without our prior
approval.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER
WARRANTIES AND REPRESENTATIONS, EXPRESSED OR IMPLIED,
AND ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF
RKI INSTRUMENTS, INC., INCLUDING BUT NOT LIMITED TO, THE
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. IN NO EVENT SHALL RKI INSTRUMENTS,
INC., BE LIABLE FOR INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
LOSS OR DAMAGE OF ANY KIND CONNECTED WITH THE USE OF
ITS PRODUCTS OR FAILURE OF ITS PRODUCTS TO FUNCTION OR
OPERATE PROPERLY.
This warranty covers instruments and parts sold to users by
authorized distributors, dealers, and representatives as
appointed by RKI Instruments, Inc.
We do not assume indemnification for any accident or damage
caused by the operation of this gas monitor, and our warranty is
limited to the replacement of parts or our complete goods.
a) Absorbent cartridges d) Batteries
b) Pump diaphragms and valves e) Filter elements
c) Fuses

RP-6 Pump for the GX-2001 • 3
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Pump Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Coiled Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sample Adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Rubber Sample Nipple. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Optional Hose & Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Low Flow Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Replacing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacing the Cotton Dust Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacing the Hydrophobic Disk Filter and Wire Mesh Disk . . . . . . 12
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
WARNING: Understand manual before operating and for proper
battery type. Substitution of components may impair
intrinsic safety.To prevent ignition of a hazardous
atmosphere, batteries must only be changed in an area
known to be nonhazardous. Not tested in oxygen
enriched atmospheres (above 21%).

RP-6 Pump for the GX-2001 • 4
Overview
This manual describes the RP-6 Pump. This manual also
describes how to operate the RP-6 with the Model GX-2001 and
maintain the RP-6. A parts list at the end of this manual lists
replacement parts and accessories for the RP-6.
Specifications
Table 1 lists specifications for the RP-6 Pump.
Table 1: Specifications
Power Supply 1 ea. AA size alkaline
Operating Time 5 hours minimum at 20°C
Operating
Temperature &
Humidity
-10°C to +40°C, 0 - 80% Relative Humidity (non-
condensing)
Dimensions 33 (D) x 34 (W) x 134 (H) mm, tapered nozzle not
included
Weight Approximately 150 g (including alkaline battery)
Sample Flow Rate 0.5 LPM (liters per minute)
Alarm Indications Low Flow & Low Battery
Safety/Regulatory
C US
186718
CSA classified, “C/US”, as Intrinsically Safe. Exia.
Class I, Groups A, B, C, &D. Class I, Zone 0.
Temperature Code T4C.

RP-6 Pump for the GX-2001 • 5
Description
The RP-6 Pump is a sample drawing accessory for the RKI
Instruments Inc. Model GX-2001 Gas Monitor. It consists of the
pump unit, the sample adapter, the coiled hose, and the rubber
sample nipple.
Figure 1: RP-6 Pump Component Location
Pump Unit
The pump unit is housed in a red plastic case. AGX-7 type male
quick connect fitting is located on one end of the pump unit.
This is the inlet fitting to the pump unit. The GX-7 quick connect
is installed in a removable clear plastic filter holder. A cotton
dust filter is inside the filter holder. The filter holder may be
removed by turning it counterclockwise and pulling it away
Inlet Fitting
(GX-7 Type)
Filter Holder
Sample Adapter
Coiled Hose
ExhaustFitting
Low Flow LED
BatteryCap
Pump Unit
On/Off Switch
Rubber Sample
Nipple
Power LED

RP-6 Pump for the GX-2001 • 6
from the pump unit. Two flat membrane disk hydrophobic
filters and a wire mesh disk are located in the pump unit on the
filter holder end.
The battery compartment is located on the other end of the
pump unit. An AA alkaline battery is installed in the battery
compartment and held in place by a black plastic battery cap.
The battery cap may be removed for access to the battery by
pushing it down, turning it counterclockwise, and pulling it
away from the pump unit.
The exhaust fitting, a male quick connect, is located near the
battery cap end of the pump unit and is smaller than the inlet
fitting.
A rotating ON/OFF switch, a power indication LED, and a low
flow LED are located near the inlet end of the pump unit. The
power LED is on when the pump unit is on. The low flow LED
flashes when the pump is experiencing a low flow condition.
Inside the pump unit case are the circuit board and diaphragm
pump. There are no user serviceable components inside the
pump unit case except for the battery accessible through the
battery cap and the wire mesh and hydrophobic disk filters
accessible through the filter holder.
Coiled Hose
A6 ft. coiled polyurethane hose is provided with the RP-6. It has
a female quick connect fitting on each end. This hose connects to
the pump unit exhaust fitting on one end and to the sample
adapter on the other end.
Sample Adapter
The sample adapter is a black plastic cup which snaps onto the
sensor face of the GX-2001. When installed, it seals to the sensor
face with integral O-rings. It has a label on the front of it to
indicate the gas names
O2 , HC , CO , and H2S . These gas names
must match up with the same gas names on the front of the GX-
2001 when the sample adapter is installed.

RP-6 Pump for the GX-2001 • 7
A male quick connect fitting is located on the top of the sample
adapter which mates to the coiled hose.
Rubber Sample Nipple
A cone shaped 4 inch long rubber sample nipple is included
with the RP-6 and is normally installed on the inlet fitting by
pushing the larger end over it. The smaller end can be inserted
in a hole or some other access to an enclosed area to sample the
environment.
Optional Hose & Probe
When desired, the rubber sample nipple may be removed and a
sample hose and probe with GX-7 fittings (optional accessories)
may be connected to the inlet fitting. Sample hose lengths are
available from 10 feet to 30 feet (see Parts List at the end of the
manual).
CAUTION: Sample hose lengths of more than 30 feet are not
recommended for the RP-6 because of flow rate reduction.

RP-6 Pump for the GX-2001 • 8
Operation
Normal Operation
1. Start up the GX-2001 and enter normal operation as
described in the GX-2001 manual.
2. Snap the sample adapter onto the sensor face of the GX-2001.
Make sure the gas name labels on the GX-2001 match up with
the gas name labels on the sample adapter and that the
sample adapter is fully engaged on the instrument. When
fully engaged, there should be no gap between the GX-2001’s
red plastic case and the sample adapter.
CAUTION: If the sample adapter is not fully engaged, the unit will
not respond to the target gases properly.
3. Connect the coiled hose to the sample adapter and to the
exhaust fitting on the pump unit.
Figure 2: Connecting the RP-6 to the GX-2001
Flow
O2
HC
02
H2S
CO
HC
POWER
MODE DISP AIR
GX-2001
RKI
H2S
CO

RP-6 Pump for the GX-2001 • 9
Figure 3: Connecting the Optional Hose & Probe
4. Attach the rubber sample nipple or an optional hose and
probe to the inlet fitting.
5. Attach the GX-2001 to your belt or clothing using the belt
clip.
6. Turn on the pump unit by turning the ON/OFF switch to the
ON position.
CAUTION: While the sample adapter is installed on the GX-2001, the
pump unit must be on and connected to the sample
adapter for the GX-2001 to function as a gas detection
monitor.
7. Go to the area to be sampled.
If the rubber sample nipple is used, use the pump unit to
Flow
02O2
RKI
CO
H2S
H2S
CO
Optional Probe
MODE DISP AIR
POWER
HC HC GX-2001
Optional Hose

RP-6 Pump for the GX-2001 • 10
sample the area of interest by holding it in the area. If
sampling from a vessel or an enclosed area is desired, insert
the rubber sample nipple into the vessel or enclosed area.
Allow the pump unit to sample for 90 seconds for a full
response on the GX-2001.
If an optional hose and probe are used instead of the rubber
sample nipple, hold the pump unit in one hand while
holding the probe in the area to be sampled. To sample from
a well or other similar sample area, the hose and probe may
be lowered into the sample area. Allow the pump unit to
sample for 1 1/2 minutes for a full response on the GX-2001.
NOTE: Although the RP-6 pump does have a hydrophobic
filter built in, the optional probe does not have a
hydrophobic filter. It has a dust filter only.
8. Monitor the GX-2001 display for the gas readings and take
appropriate action if gas alarms occur.
9. When sampling is complete, go to a fresh air area and turn off
the pump unit.
10.Remove the sample adapter from the GX-2001.
11.Remove the GX-2001 from your belt or clothing.
12.Turn off the GX-2001.
13.For convenience, you may leave the pump unit and the
sample adapter connected to the hose for storage of the RP-6.
Low Flow Alarm
When pump unit experiences a low flow condition, the Low
Flow LED starts flashing and the pump stops operating. Check
the rubber sample nipple and filters to make sure they are clear.
If a hose and probe are used, check them for kinks or
obstructions. To reset the low flow condition, turn the pump
unit off and restart it. If the low flow condition persists, the
pump may need servicing.

RP-6 Pump for the GX-2001 • 11
Maintenance
ReplacingThe Battery
NOTE: To maintain the CSA classification of the RP-6, use
Eveready Energizer E91, Duracell MN1500, or Duracell
PC1500 alkaline AA batteries.
1. Locate the black plastic battery cap on one end of the pump
unit.
2. Push down and rotate battery cap counterclockwise until it
stops, 1/8 of a turn.
3. Pull the battery cap away from the pump unit.
4. Remove the old battery from the pump unit. It will slide right
out.
5. Insert the new battery + end first into the pump unit. Use an
AA alkaline. The battery orientation is shown on the pump
unit between the serial number label and the battery cap.
6. Slide the battery cap over the battery onto the pump unit,
push it down and turn it clockwise unit is stops.
Replacing the Cotton Dust Filter
1. Locate the clear plastic filter holder at one end of the pump
unit.
2. Grasp the two ridged sides of the filter holder and turn it
about 1/8 of a turn counterclockwise.
3. Pull the filter holder away from the pump unit.
4. Remove the old cotton dust filter from the filter holder and
replace it with a new cotton dust filter.
5. Reinstall the filter holder. Align the two tabs on the bottom of
the filter holder with the two slots in the pump unit. Push the
filter holder into the pump unit and turn it about 1/8 turn
clockwise until it snaps into place.

RP-6 Pump for the GX-2001 • 12
Replacing the Hydrophobic Disk Filter
andWire Mesh Disk
1. Locate the clear plastic filter holder at one end of the pump
unit.
2. Grasp the two ridged sides of the filter holder and turn it
about 1/8 of a turn counterclockwise.
3. Pull the filter holder away from the pump unit. Do not lose
the cotton dust filter.
4. The hydrophobic disk filters and wire mesh disk are located
in the pump unit and are retained by a rubber gasket. Pull
out the rubber gasket with needle nose pliers.
Figure 4: Changing the Hydrophobic & Wire Mesh Filters
5. Remove the old hydrophobic filters and/or wire mesh disk
from the gasket. A hydrophobic filter is located on either side
of the wire mesh disk.
Wire Mesh
Disk
Filter Holder
Rubber Gasket
Hydrophobic Disk Filter
Cotton Dust Filter

RP-6 Pump for the GX-2001 • 13
6. Install the new hydrophobic filters and/or wire mesh disk
making sure a hydrophobic filter is located on each side of
the wire mesh disk.
7. Reinstall the gasket with the parts into the pump unit.
8. Reinstall the filter holder with the cotton dust filter. Align the
two tabs on the bottom of the filter holder with the two slots
in the pump unit. Push the filter holder into the pump unit
and turn it about 1/8 turn clockwise until it snaps into place.

RP-6 Pump for the GX-2001 • 14
Parts List
Table 2 lists replacement parts and accessories for the RP-6 Pump.
Table 2: Parts List
Part Number Description
07-2005RK Gasket, filter/screen retaining
07-6001RK O-ring, for battery compartment
13-0112RK Wrist strap
17-1001RK Tapered rubber nozzle
21-1829RK Battery cap
21-1832RK Filter holder, clear plastic
33-0159RK Hydrophobic disk filter
33-1031RK Cotton ball 25 pack, for replacement of cotton
dust filter
33-1112RK Wire mesh disk filter
49-1120RK AA alkaline battery
80-0009RK-XX Sample hose (optional). Replace “XX” with
length in feet. Available lengths for the RP-6 are
10, 15, 20, 25, & 30 feet.
80-0020RK Coiled sample hose, RP-6 to sample adapter
80-0150RK Sample probe with dust filter (optional)
81-1106RK Sample adapter, rigid plastic