Operating Instructions
Universal Sample Pump
Cat. No. 224-PCXR4
SKC Inc.
863 Valley View Road
Eighty Four, PA 15330
Form 37712 Rev 1302
Table of Contents
Description ........................................................................ 1
Performance Profi le ............................................................................................2
Operation ........................................................................... 5
High Flow Applications .......................................................................................5
Low Flow Single-tube Applications .....................................................................9
Low Flow Multiple-tube Applications ................................................................13
Maintenance .................................................................... 17
Pump Inlet Filter ...............................................................................................17
Battery Pack Care ............................................................................................17
Installing the Battery Pack ................................................................................18
Replacing Battery Pack ....................................................................................18
Pump Service ...................................................................................................19
Parts Descriptions ............................................................................................20
Replacement Parts ...........................................................................................22
Optional Accessories ..................................................... 24
Warranty .......................................................................... 25
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Indicates a premier feature of the pump
Universal Sample Pump Operating Instructions
are also available in Spanish, German, and French Canadian.
Description
The PCXR4 Universal Sample Pump is a constant fl ow air sampler suitable for a broad
range of applications. It is ideal for industrial hygiene studies as well as environmental
testing.
Durable RFI-shielded Case
provides protection from radio
Rechargeable Battery
Digital LCD
shows run time,
battery check, and
fault conditions.
frequency interference
between 27 and 1000 MHz.
Air Discharge Port
(beneath cap screw)
Low Flow Regulator Screw
(beneath cap screw)
allows pump to be switched
from high to low fl ow.
Accessory Mounting
Screws
allow sampling accessories
such as impinger holders
to be secured to pump.
Built-in Particulate
Trap
in see-through
housing
protects pump.
Tamper-resistant Cover
prevents changes to
settings.
Recessed Flow
Adjustment
adjusts fl ow rate between
1000 and 5000 ml/min.
On/Off
Switch
Touch Keypad
PCXR4 Universal Sample Pump
1
Built-in Rotameter
provides a visible check of
relative fl ow rate during
sampling, from 0.5 to 5 L/min.
Performance Profi le
Flow Range: 1000 to 5000 ml/min (UL Listed model)
(5 to 500 ml/min requires adjustable low fl ow holder)
Weight: 34 oz (964 gm)
Dimensions: 5.1 x 4.7 x 1.9 in (13 x 11.9 x 4.8 cm)
Compensation Range: 1000 to 2500 ml/min at 40 inches water back pressure
3000 ml/min at 35 inches water back pressure
4000 ml/min at 20 inches water back pressure
5000 ml/min at 10 inches water back pressure
Typical Back Pressure of Sampling Media (inches water)
Flow Rate (L/min) 1.0 1.5 2.0 2.5
Filter/Pore Size (μm)
25-mm MCE, 0.8 6 9 12 15
25-mm MCE, 0.45 14 22 28 35
37-mm MCE, 0.8 2345
37-mm PVC, 5.0 1122
Compare the information in this table to pump compensation range to determine appropriate applications.
Flow Control: Holds constant fl ow to ± 5% of the set point
Run Time: NiCad Battery: 8 hrs minimum at 4000 ml/min and 20 inches water
back pressure; dependent on media used. See Table 1 on page 4.
NiMH Battery: 12 hrs minimum at 4000 ml/min and 20 inches water
back pressure; dependent on media used. See Table 2 on page 4.
Battery Eliminator: Pump provides extended runs.
Flow Indicator: Built-in rotameter with 250-ml division; scale marked at 1, 2, 3,
4, and 5 L/min
Power Supply: 6.0-V plug-in NiMH battery pack, rechargeable, 3.5-Ah capacity or
6.0-V plug-in NiCad battery pack, rechargeable, 2.0-Ah capacity
A battery eliminator is available (see Optional Accessories); use
voids the UL Listing for intrinsic safety.
Charging Time: 6 to 8.5 hrs with PowerFlex charger
(varies with battery capacity
and level of discharge)
Intrinsic Safety: UL Listed for: Class I, Division 1 and 2, Groups A, B, C, D;
Class II, Division 1 and 2, Groups E, F, G; and Class III,
Temperature Code T3C
ATEX-approved models available. Contact SKC.
Operating Temperature: 32 to 113 F (0 to 45 C)
Storage Temperature: -4 to 113 F (-20 to 45 C)
Charging Temperature: 50 to 113 F (10 to 45 C)
Operating Humidity: 0 to 95% non-condensing
Protect sample pump from weather when in use outdoors.
Multiple-tube Sampling: Built-in constant pressure regulator allows user to take up to
four simultaneous tube samples at different fl ow rates up to
500 ml/min each using optional adjustable low fl ow holder.
2
RFI/EMI Shielding: Complies with requirements of EN 55022, FCC Part 15 Class
B,
EN 50082-1; frequency range of the radiated susceptibility test
was 27 to 1000 MHz.
Flow Fault: If the pump is unable to compensate for longer than 15 seconds due
to excessive back pressure, the pump enters fl ow fault. During fl ow
fault, the pump stops, displays FLOW FAULT, pauses timing functions, and displays elapsed time. Auto-restart is attempted up to 5
times.
Low Battery Fault: Pump stops, displays LO BATT, pauses timing functions, and dis-
plays elapsed time.
Battery Test: LCD shows battery condition prior to sampling.
Time Display: LCD displays up to 9999 minutes (6.8 days) at which point the
display rolls over to 0.
Timing Accuracy: ± 0.05% (± 45 seconds per day)
Sampling Pause (Hold): Allows user to temporarily halt sampling without loss of timing data.
Restart does not require resetting time.
Tubing: Requires 1/4-inch ID tubing
CE marked UL Listed
ATEX-approved models available
3
Table 1. Pump Run Time in Hours with NiCad Battery
Following are typical run times achieved when using a fully charged nickelcadmium (NiCad) battery pack. Data is sorted by type of sample media. All run
times are listed in hours. Results obtained using a new pump and new fully
charged battery. Pump performance may vary.
Mixed Cellulose (MCE) fi lter, 0.8-μm pore size
Flow Rate (L/min)
2.0 24.1 16.3
2.5 21.4 14.5
3.0 19.1 11.0
3.5 17.8 10.7
4.0 15.4 **
4.5 14.6 **
Polyvinyl Chloride (PVC) fi lter, 5.0-μm pore size
Flow Rate (L/min)
2.0 31.6 21.7
2.5 27.7 24.0
3.0 27.0 18.6
3.5 22.8 16.4
4.0 19.4 16.2
4.5 19.0 14.6
** Filter back pressure exceeded pump capability during testing.
Filter Diameter
37 mm 25 mm
Filter Diameter
37 mm 25 mm
Note
Increases in back pressure during sampling due to buildup of sample
on the fi lter can decrease ba ery life.
Table 2. Pump Run Time in Hours with NiMH Battery
Following are typical run times achieved when using a fully charged nickel-metal
hydride (NiMH) battery pack. Data is sorted by type of sample media. All run times
are listed in hours. Results obtained using a new pump and new fully charged
battery. Pump performance may vary.
Mixed Cellulose (MCE) fi lter, 0.8-μm pore size
Filter Diameter
37 mm 25 mm
Filter Diameter
37 mm 25 mm
Note
Flow Rate (L/min)
2.0 37 33
2.5 34 26
3.0 31 21
3.5 29 18
4.0 25 15
4.5 20 14
Polyvinyl Chloride (PVC) fi lter, 5.0-μm pore size
Flow Rate (L/min)
2.0 47 41
2.5 38 33
3.0 35 30
3.5 26 27
4.0 22 25
4.5 21 23
Increases in back pressure during sampling due to buildup of sample
on the fi lter can decrease ba ery life.
4
Operation
High Flow Applications (1000 to 5000 ml/min)
1
8
9
5
4
3
2
1
14
9
15
BACK
AIRCHEK
SAMPLER
1
2
SAMPLE PERIOD Ñ MINUTES
3
START
HOLD
4
5
FRONT
16
18
16
LISTED 124U
FLOW
AND
BATTERY
CHECK
AIRCHEK SAMPLER
MODEL 224-PCXR4
ON
FLOW
ADJ
7
TOP
Figure 1
Front, back, and top views of PCXR4 Sampler
For additional drawings, see pages 21 and 23.
Setup
Install battery (see Installing the Battery Pack on page
18). For optimum charging, ensure pump is not running.
Charge the battery by connecting the charger plug to the
sampler charging jack (Figure 1, #18). Ensure that the
battery is fully charged before sampling.
After charging the battery pack, it is good practice
to run the pump for approximately fi ve minutes
before calibrating. This ensures the battery is in
more steady-state conditions and improves the
agreement in pre and post-sampling calibrations.
Do not charge or operate pump from charger in hazardous locations.
Use only an SKC-approved charger designated for this model to
ensure reliable performance. Failure to do so voids any warranty.
Ensure proper orientation of charging cable before plugging it into
the charging jack. Improper orientation/contact will short-circuit the
battery and voids any warranty.
Short-circuiting the battery pack will render it immediately inoperative.
Failure to follow warnings and cautions voids any warranty.
1 LCD
2 Flow and Battery
Check Key
3 Start/Hold Key
4 On/Off Switch
5 Tamper-resistant Cover
7 Flow Adjustment Screw
8 Accessory Mounting
Screws (2)
9 Intake/Filter Housing
14 Cap Screw to Regulator
15 Cap Screw to Air
Discharge Port
16 Battery Pack Screws (2)
18 Charging Jack
Charger and battery
connected
The battery pack may be kept on the SKC-approved charger for an
indefi nite time.
5
2
De-activating the Regulator
To ensure the pump is set for high fl ow,
remove the cap screw (Figure 1, #14)
covering the regulator valve and turn the
exposed screw clockwise until it stops.
(Do not overtighten.)
Replace the cap screw. The pump is now
set for high fl ow.
Setting or Verifying Flow Rate
Before use, allow pump to
equilibrate after moving
it from one temperature
extreme to another.
Ensure pump has run for
fi ve minutes before proceeding with calibration.
Sample
medium
For high fl ow,
turn valve screw
clockwise.
3
Using 1/4-inch Tygon®
tubing, connect the
sampling medium to the
pump intake (Figure 1,
#9).
Remove the tamper-resistant cover. Start the pump using the on/
off switch (Figure 1, #4). Press Start/Hold (Figure 1, #3). Press
Flow and Battery Check (Figure 1, #2). Adjust fl ow using the fl ow
adjustment screw (Figure 1, #7) until the built-in rotameter reads
2 L/min. The LCD should indicate BATT OK in the upper left
corner (if it doesn’t, recharge battery). Press Flow and Battery
Check to place pump in Hold.
Connect a calibrator to the intake of the sampling medium.
Press Flow and Battery Check to start pump, and set the fl ow rate
using the fl ow adjustment screw (Figure 1, #7).
When the fl ow rate is set, press Flow and Battery Check to place
pump in Hold. Disconnect the calibrator.
Replace the sampling medium used for calibration with an
unexposed medium for sample collection.
Flow
adjustment
screw
6
On/Off
switch
Calibrator
Calibration train with fi lter cassette
Tubing
4
Sampling
Before use, allow pump to equilibrate after
moving it from one temperature extreme to
another.
Protect sample pump from weather when in
use outdoors.
Use of any device other than the approved
battery pack to power the pump voids the
UL Listing for intrinsic safety and any
warranty.
For personal sampling, clip the sample collection media to the worker in the breathing
zone.
While the LCD displays HOLD, start sampling by pressing Start/
Hold. SAMPLE RUNNING will display. Record the start time. The
LCD will automatically track sampling period time elapsed.
At the end of the sampling period, press Start/Hold and record the
stop time.
User Options During Sampling
Pause - Pause (shutdown) the pump by pressing Start/Hold. All
timing data will freeze. To resume sampling, press Start/Hold;
timing data will resume.
Flow or Battery Fault Shutdown - If the pump is unable to
compensate due to excessive back pressure or a low battery condition
exists the sampler will shut down. HOLD will display on the LCD
and timing functions will pause, but continue to display elapsed time.
LO BATT or FLOW FAULT will display on the LCD depending
on the cause of the shutdown. Fifteen seconds after fl ow fault shut
down, the pump will attempt to restart up to fi ve times. To restart
from fl ow fault, correct the blockage and press Start/Hold. If LO
BATT is displayed, recharge the battery before sampling.
Clip sample medium to
worker and pump to belt.
continued on page 8
7
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