RP-3R Pump for
GX-3R and GX-3R Pro
Operator’s Manual
Part Number: 71-0495
Revision: P1
Released: 5/13/19
www.rkiinstruments.com
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.
a) Absorbent cartridges d) Batteries
b) Pump diaphragms and valves e) Filter elements
c) Fuses
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.
RP-3R
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pump Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Rubber Sample Nipple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Optional Hose & Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Switching Flow Rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacing the Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacing the Hydrophobic Disk Filter and Wire Mesh Disk. . . . . . . . . . . . . . . . . 11
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
WARNING: Understand manual before operating and for proper battery type.
Substitution of components may impair intrinsic safety. To prevent
ignition of a ha zardous atmo sphere , batteries must only be chan ged
in an area known to be nonhazardous. Not tested in oxygen
enriched atmospheres (above 21%).
CAUTION: Read and understand the GX-3R and GX-3R Pro Operator’s Manual
before using the RP-3R.
RP-3R
Overview
This manual describes: the RP-3R pump, RP-3R maintenance, and operation of
the RP-3R with the GX-3R and GX-3R Pro. A parts list at the end of this manual
lists replacement parts and accessories for the RP-3R.
Specifications
Table 1 lists specifications for the RP-3R pump.
Table 1: Specifications
Power Supply 1 AA size alkaline
Operating Time Higher-flow mode: 10 hours minimum at 25°C
Lower-flow mode: 16 hours minimum at 25°C
Operating Temperature
& Humidity
Dimensions 29 (D) x 82 (W) x 96 (H) mm, rubber sample nipple not included
Weight Approximately 120 g (including alkaline battery)
Sample Flow Rate Higher-flow mode: 0.50 LPM (liters per minute)
Alarm Indications Low Flow & Low Battery
Safety/Regulatory
(when used with the
GX-3R or GX-3R Pro)
-20°C to +50°C, 0 - 95% Relative Humidity (non-condensing)
Lower-flow mode: 0.35 LPM (liters per minute)
ATEX
(Certificate Number Presafe 17 ATEX 11584)
• II1G Ex ia IIC T4 Ga (-20°C to +50°C Toshiba LR6)
• II1G Ex ia IIC T4 Ga (-20°C to +40°C Duracell MN1500)
• II1G Ex ia IIC T3 Ga (-20°C to +50°C Duracell MN1500)
IECEx
• Ex ia IIC T4 Ga (-20°C to +50°C Toshiba LR6)
• Ex ia IIC T4 Ga (-20°C to +40°C Duracell MN1500)
• Ex ia IIC T3 Ga (-20°C to +50°C Duracell MN1500)
(Certificate Number IECEx PRE 17.0070)
4 RP-3R
Description
Inlet Fitting
Sensor Adapter
Rubber Sample
Nipple
White LockingLever
Retaining T ab Lev er
Ba t ter y Cap
POWER
Exhaust Fi tting
Buzzer Opening
FLOW
Front
Bottom
RESET
POWER
RP-3R
The RP-3R pump is a sample drawing accessory for the GX-3R and GX-3R Pro. It
consists of the pump unit and the rubber sample nipple.
Figure 1: RP-3R Pump Component Location
Pump Unit
The pump unit is housed in a red plastic case. The silver inlet fitting on the right
side of the pump unit allows for connection of a rubber sample nipple or a hose
and probe. The inlet fitting’s clear holder retains 2 hydrophobic membranes and a
mesh disk.
The black cap at the bottom right of the pump unit allows for battery
compartment access. The pump unit needs one AA alkaline battery.
The exhaust fitting is located on the bottom left of the pump unit, next to the
battery compartment.
A POWER button, a buzzer opening, a POWER LED, and a FLOW LED are
located along the middle front of the pump unit.
RP-3R 5
The sensor adapter at the top of the pump unit mates to the GX-3R or GX-3R Pro.
There are different sensor adapters for each instrument type. When installed, the
text on the front of the GX-3R/GX-3R Pro and RP-3R should be facing the same
way.
A white locking lever on the left side of the pump unit helps ensure the pump
unit stays connected to the GX-3R or GX-3R Pro.
Rubber Sample Nipple
A cone-shaped 4-inch long rubber sample nipple is included with the RP-3R. It
can be installed by pushing the larger end over the inlet fitting. The smaller end
can be inserted in a hole or some other access point to sample the environment.
Optional Hose & Probe
A sample hose and probe (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-3R because of flow rate reduction.
Normal Operation
1. Start up the GX-3R or GX-3R Pro and enter normal operation as described in
the appropriate Operator’s Manual.
2. Slide the white locking lever down and push the bottom of the black retaining
tab toward the pump unit.
WARNING: Installing the GX-3R or GX-3R Pro onto the RP-3R with the white
locking lever in the “LOCK” position may result in damage to the
RP-3R.
3. Be sure the front labels on the GX-3R or GX-3R Pro are facing the same way as
the front labels on the RP-3R.
4. When viewing the GX-3R or GX-3R Pro and RP-3R from the front, engage the
RP-3R’s right-hand retaining clip with the GX-3R or GX-3R Pro.
5. Push the left side of the GX-3R or GX-3R Pro down until the instrument is
seated in the RP-3R and both retaining clips are fully engaged. When fully
engaged, the GX-3R or GX-3R Pro should not move around at all.
CAUTION: If the RP-3R is not fully engaged, the unit will not respond to the target
gases properly.
6 RP-3R
A
I
R
FLOW
POWER
RESET
POW ER
P
O
W
E
R
M
O
D
E
G
X
-
3
R
1. Slide white locking
lever down
2. Push black retaining tab
lever toward pump unit
C
O
/
H
2
S
L
E
L
O
2
RP-3R
4. Push left side down
until fully seated
3. Engage right-hand
retaining clip.
6. Release the black retaining tab and the white locking lever to secure the GX-3R
Figure 3: Connecting the RP-3R to the GX-3R
or GX-3R Pro in the RP-3R.
RP-3R 7
7. Attach the rubber sample nipple or optional hose and probe to the inlet fitting.
POWER
MODE
AIR
POWER
CO/H2S LEL O2
POWER
GX-3R
RP-3R
RESET
FLOW
Figure 5: Connecting the Optional Hose & Probe
8. Turn on the RP-3R by pressing and holding the POWER button until the RP3R beeps and the POWER LED turns green.
WARNING: While the GX-3R or GX-3R Pro is installed in the RP-3R, the pump
must be on for the GX-3R or GX-3R Pro to function as a gas
detection monitor.
9. Go to the area to be sampled.
Rubber sample nipple
: Insert the rubber sample nipple into the vessel or
enclosed area. Allow the RP-3R to sample for 90 seconds before observing the
reading on the GX-3R or GX-3R Pro.
Hose and probe: Hold the probe in the area to be sampled. If necessary, the
hose and probe may be lowered into the sample area. Allow the pump unit to
sample for 90 seconds before observing the reading on the GX-3R or GX-3R
Pro.
NOTE: The hose and probe do not have their own hydrophobic filters. Take
care to not draw liquid through the hose and probe.
10. Monitor the GX-3R or GX-3R Pro’s gas r eadings and take appropriate act ion if
gas alarms occur.
8 RP-3R
11. When sampling is complete, turn off the RP-3R by pressing and holding the
A
I
R
POWER
RESET
POWER
FLOW
P
O
W
E
R
M
O
D
E
G
X
-
3
R
1. Slide white locking
lever down
2. Push blac k reta ining tab
lever toward pump unit
C
O
/
H
2
S
L
E
L
O
2
RP-3R
3. Pull up on left side
POWER button until the RP-3R sounds a long beep and the POWER LED
turns off.
12. Turn off the GX-3R or GX-3R Pro.
13. Slide the white locking lever down and push the bottom of the black retaining
tab toward the pump unit.
WARNING: Removing the GX-3R or GX-3R Pro from the RP-3R with the white
locking lever in the “LOCK” position may result in damage to the
RP-3R.
14. Pull up on the left side of the GX-3R or GX-3R Pro when viewing the
instrument from the front.
RP-3R 9
Figure 7: GX-3R Removal
Switching Flow Rates
The RP-3R can operate in a higher-flow mode (standard) or a lower-flow mode.
Flow Mode LED Indication
Higher-flow mode FLOW LED steadily yellow
Lower-flow mode FLOW LED flashes yellow
1. With the RP-3R turned on, press and hold the POWER button for 1 second.
2. The FLOW LED will change state (ie. from flashing to steady or vice versa).
NOTE: At temperatures below -10°C, the RP-3R must operate in higher-flow
mode. If operating in lower-flow mode, the RP-3R will automatically
switch to higher-flow mode at -10°C. Any attempt to switch to lowerflow mode will be blocked.
Alarms
The table below outlines the alarms that may occur on the RP-3R.
Alarm Type
Low Battery POWER
Dead Battery POWER
Low Flow
NOTE: A low flow alarm
may get combin ed with a
low or dead battery
alarm since a low battery
voltage may cause the
pump to stop working.
Visual
Indications
LED flashing
LED flashing
FLOW LED
quickly
flashing
Audible
Indications
none none Replace the battery.
constant
buzzer
intermittent
buzzer
Other
Indications
none Replace the battery.
pump stops • Check the rubber
Recommended
Action
sample nipple and
filters to make sure
they are clear.
• If a hose and probe
are used, check
them for kinks or
obstructions.
• Press and release
the POWER button
to reset the alarm.
• If the low flow
condition persists,
the pump may need
servicing.
10 RP-3R
Maintenance
Filter Holder
RESET
Rubber Gasket
Hydrophobic D isk Filter
Hydrophobic D isk Filter
Wire MeshDisk
RP-3R
POWER
FLOW
POWER
Holein
Spacer
Clear Spacer (for GX-3R
Versions Only)
Replacing The Battery
1. Push down and rotate the black battery cap counterclockwise until it stops.
2. Pull the battery cap away from the pump unit.
3. Remove the old battery.
4. Insert the new AA alkaline battery + end first into the pump unit. The battery
orientation is shown on the back of the pump unit.
5. Reinstall the black battery cap by pushing it down and turning it clockwise
until it stops.
Replacing the Hydrophobic Disk Filter and Wire Mesh Disk
1. Grasp the clear filter holder (under the inlet fitting) and turn it 1/4 of a turn
counterclockwise.
2. Pull the filter holder away from the pump unit.
3. The hydrophobic disk filters and wire mesh disk are located in the pump unit
and are retained by a rubber gasket. Gently pull out the rubber gasket with
needle nose pliers taking care not to damage the gasket. The GX-3R version of
the RP-3R has a clear spacer below the gasket that may come out. The GX-3R
Pro version of the RP-3R does not have this spacer.
RP-3R 11
Figure 8: Changing the Hydrophobic & Wire Mesh Filters
4. Remove the old hydrophobi c filters an d/or wire mesh disk fr om the gasket. A
hydrophobic filter is located on either side of the wire mesh disk.
5. 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.
6. For the GX-3R version: If the clear spacer below the rubber gasket came out
when you removed the gasket, reinstall the spacer. Be sure the hole in the
spacer lines up with the hole in the housing.
7. Reinstall the gasket/filters/mesh into the pump unit.
8. 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 1/4 turn
clockwise until it snaps into place.
Parts List
Table 2 lists replacement parts and accessories for the RP-3R pump.
Table 2: Parts List
Part Number Description
07-2006 Gasket, filter/screen retaining
07-6051 O-ring, for battery compartment
17-1001RK Rubber sample nipple
21-1833RK Filter holder, clear plastic, with inlet fitting
21-1957 Battery cap
21-1958 Clear spacer underneath the filter/screen retaining gasket,
for GX-3R versions only
33-0159RK Hydrophobic disk 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-3R are 10, 15, 20, 25, & 30
feet.
80-0150RK Sample probe with dust filter (optional)
12 RP-3R
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