Operating Instructions
Universal Sample Pump
Cat. No. 224-44XR
SKC Inc.
863 Valley View Road
Eighty Four, PA 15330
Form 37711 Rev 1303
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 ..........................................12
Maintenance ....................................................................................... 15
Pump Inlet Filter .........................................................................15
Battery Pack Care ......................................................................15
Installing the Battery Pack .......................................................... 16
Replacing the Battery Pack ........................................................16
Pump Service .............................................................................17
Parts Descriptions ............................................................................. 18
Replacement Parts ............................................................................ 20
Optional Accessories ........................................................................ 22
Warranty ............................................................................................. 23
Indicates a warning or caution
Indicates a premier feature of the pump
Indicates a reminder or note
Description
The 44XR 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.
Rechargeable Battery
Tamper-resistant Cover
prevents changes to settings.
Recessed Flow Adjustment
adjusts fl ow rate between
1000 and 5000 ml/min.
Durable RFI-shielded Case
provides protection from
radio frequency interference
between 27 and 1000 MHz.
Air Discharge Port
(beneath cap screw)
On/Off
Switch
Accessory Mounting Screws
allow sampling accessories
such as impinger holders to be
secured to pump.
Low Flow Regulator Screw
(beneath cap screw) allows
pump to be switched from
high to low fl ow.
Built-in Particulate Trap
in see-through housing
protects pump.
Built-in Rotameter
provides a visible check
of relative fl ow rate during
sampling from 0.5 to 5 L/min.
44XR Universal Sample Pump
1
Performance Profi le
Flow Range: 1000 to 5000 ml/min (UL Listed)
(5 to 500 ml/min requires adjustable low fl ow holder)
Weight: 34 oz (964 gm)
Dimensions: 5.1
(13 x 11.9 x 4.8 cm)
Compensation Range:
x 4.7 x 1.9 in
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 3.0
Filter/Pore Size (μm)
25-mm MCE, 0.8 6 9 12 15 18
25-mm MCE, 0.45 14 22 28 35 40
37-mm MCE, 0.8 23456
37-mm PVC, 5.0 11222.5
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 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.
MSHA-approved models available. Contact SKC.
2
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.
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.
Tubing: Requires 1/4-inch ID tubing
CE marked
UL Listed
ATEX-approved models available
MSHA-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 **
Filter Diameter
37 mm 25 mm
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.
Note:
Increases in back pressure during sampling due to buildup of sample on
Filter Diameter
37 mm 25 mm
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
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
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.
4
Operation
6
5
4
3
2
1
FLOW
ADJ
ON
AIRCHEK SAMPLER
MODEL 224-44XR
U
L
¨
LISTED 124U
11
TOP
FRONT
BACK
15
1
4
5
13
13
AIRCHEK
SAMPLER
12
High Flow Applications (1000 to 5000 ml/min)
1 On/Off switch
4 Flow adjustment screw
5 Accessory mounting screws (2)
6 Intake fi lter housing
11 Cap screw to regulator
12 Cap screw to air discharge port
13 Battery pack screws (2)
15 Charging jack
Figure 1
Front, back, and top views of 44XR Sampler
For additional drawings, see pages 19-21.
Setup
Install battery (see Installing the Battery Pack on page
16). For optimum charge, ensure pump is not running.
Charge the battery by connecting the charger plug to
the sampler charging jack (Figure 1, #15). Ensure that
the battery is fully charged before sampling.
1
A er charging the ba ery 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 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.
The battery pack may be kept on the SKC-approved charger for an indefi nite
time.
5
Charger and battery
pack connected
Deactivating the Regulator
To ensure the pump is set for high fl ow,
remove the cap screw (Figure 1, #11)
covering the regulator valve and turn
the exposed screw clockwise until it
stops. (Do not overtighten.)
2
3
Replace the cap screw. The pump is
now set for high fl ow.
For high fl ow,
turn valve screw
clockwise.
Setting or Verifying Flow Rate
Ensure pump has run for fi ve minutes before proceeding with calibration.
Before use, allow pump
to equilibrate after
moving it from one
temperature extreme to
another.
Using 1/4-inch Tygon®
tubing, connect the sampling
medium to the pump intake
(Figure 1, #6).
Connect a calibrator to
the intake of the sampling
medium.
Flow
adjustment
screw
Sampling
medium
On/Off
switch
Calibrator
Calibration train with fi lter cassette
Tubing
Remove the tamper-resistant cover. Start the pump using the on/off
switch (Figure 1, #1), and set the fl ow rate using the fl ow adjustment
screw (Figure 1, #4).
When the fl ow rate is set, turn off the pump and disconnect the
calibrator.
Replace the sampling medium used for calibration with an unexposed
medium for sample collection.
6
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