Universal Air Sampling Pump
This manual covers the following models:
224-44MTX, 224-PCMTX4, 224-PCMTX8
www.skcltd.com
Operating Instructions
Purchase Details and Service History
Thank you for choosing an SKC product. Your purchase is covered by our warranty, details of which can be
found inside the rear cover of this manual.
Product Model Number Product Serial Number Date of Purchase
SKC recommends annual servicing of this product. The first service is due one year from the date of purchase,
and then at yearly intervals on this date.
Service Date Service Date Service Date
1 5 9
2 6 10
3 7 11
4 8 12
Please note that SKC Ltd are the only authorised service centre in the UK, guaranteeing you access to the full
range of genuine SKC replacement parts. For all other areas a full list of SKC approved distributors and service
centres can be found at www.skcltd.com
SKC UK service centre - Tel: +44 (0)1258 480188 Fax: +44 (0)1258 480184 Email: info@skcltd.com
Page 2 224-UMTXM Issue F www.skcltd.com
Contents
Intrinsic Safety Information .............................................................................................................................2
Specifications ................................................................................................................................................3
General Information .......................................................................................................................................6
Diagram of the Universal MTX Pump .............................................................................................................8
Pump Controls Layout .................................................................................................................................10
Getting Started ............................................................................................................................................11
Operating the Timer (224-PCMTX8 Only) ..................................................................................................... 14
Low Flow Sampling .....................................................................................................................................18
Troubleshooting ...........................................................................................................................................20
Care of the Battery Pack ..............................................................................................................................22
Universal MTX Pump Components ..............................................................................................................24
Universal MTX Pump Replacement Parts .....................................................................................................25
Universal MTX Pump Accessories................................................................................................................26
Intrinsic Safety Certification ..........................................................................................................................28
Warranty Information ...................................................................................................................................34
www.skcltd.com 224-UMTXM Issue F Page 1
Intrinsic Safety Information
The Universal MTX pump range
• Complies with the EC ATEX Directive 94/9/EC on equipment intended for use in potentially explosive
atmospheres, as intrinsically safe to EEx ia IIC T4, for use in Europe.
• The equipment may be used in zones 1 and 2 with flammable gases and vapours with apparatus groups
II
A, IIB & IIC and with temperature classes T1,T2,T3,T4.
• The equipment is only certified for use in ambient temperatures in the range -20 to +40°C and should not
be used outside this range.
• The battery pack should not be charged in a hazardous area.
• Use only SKC approved chargers designated for the model.
• The equipment has not been assessed as a safety related device (as referred to in Directive 94/9/EC
Annex II, clause 1.5).
• The equipment should not be used if damaged in a way that could invalidate intrinsic safety. Such
defects might include cracking of the battery pack enclosure and internal encapsulant such that internal
components or cells are exposed.
Important note about intrinsic safety
If you are unsure as to whether the Universal pump you have purchased is suitable for your environment, check
with your site manager or responsible person BEFORE USE that the intrinsic safety rating on the product meets
your site requirements. SKC personnel are unable to recommend the appropriate safety rating for your site.
Page 2 224-UMTXM Issue F www.skcltd.com
Specifications
All models
131mm 57mm
• Weight: 915 g
• Casing IP rating: IP20
• Operating range: 5 - 4000 ml/min (5 - 500 requires adapter)
• Flow control: ±5% set point constant flow
• Flow indicator: Scale range 0.5 - 5.5 l/min
• Battery pack: NiMH rechargeable, 2.0 Ah, 4.8 V
133mm
• Storage & operating temperature: -20°C to +40°C
• Operating humidity: 0 to 95% RH
• Compensation range:
Flow rate
(l/min)
1 5 - 30
2 0 - 25
3 0 - 20
4 0 - 10
Back Pressure
(inches of water)
Typical sample media back pressure:
IOM sampler with GFA filter at 4 l/min =
approximately 10 inches of water
IOM sampler with 0.8µm MCE filter at 2 l/min =
approximately 15 inches of water
• Typical run time: 8 hours minimum at 3000 ml/min and 20 inches of water back pressure
224-PCMTX4 & 224-PCMTX8 only:
• Timer: Run time display 0 to 9999 minutes
Hold feature to pause pump and timer
Fault shutdown for low battery and high back pressure with timer freeze
224-PCMTX8 only:
• Timer: Delayed start up to 9999 minutes
Timed shut down
www.skcltd.com 224-UMTXM Issue F Page 3
Specifications
Pump Features
All Models
SKC offer two battery charger options for the Universal MTX series pumps, a single
Battery charging options
Mains power option
Anti-tamper cover
Low battery shutdown
Flow indicator
Particulate trap
Page 4 224-UMTXM Issue F www.skcltd.com
charger (Part No. 223-203A) and a five station charger (Part No. 223-103A). Both charger
models provide optimum charging of the NiMH battery packs used in the Universal MTX
series pumps, based on a timed (16 hour) constant current charging phase followed by
a switch to a trickle charging rate to prevent overcharging.
The Universal MTX series pumps can also be powered from the electrical mains supply
using a ‘battery eliminator’ (Part Nos. 223-305B - Euro 2 pin plug, 223-305C UK 3 pin
plug). This accessory comprises a mains adaptor and dummy battery pack which is fitted
to the pump in place of the standard battery pack. Please note that the pump’s ATEX
certification is invalidated when using the battery eliminator, and therefore must not be
used in hazardous areas when the battery eliminator is fitted.
The pump controls are situated beneath a clear anti-tamper cover, requiring a tool for
removal. This helps prevent tampering during a sample run.
Automatic pump shutdown in the event of a low battery condition. Prevents degradation
of battery pack due to over-discharge.
Built in rotameter to indicate airflow during sampling. Gives visual indication of changes in
flow rate during a sample due to filter loading or constricted tubing for example. Note the
flow indicator must not be used to calibrate the sample flow rate.
Built in replaceable filter to trap particles that would otherwise contaminate the pump
mechanism.
Specifications
Pump Features
224-PCMTX4 & 224-PCMTX8 Only
LCD screen indicates elapsed sample run time in minutes up to 9999 minutes
LCD screen
Sample hold function Enables pausing and restarting of the pump during a sample.
Flow fault function
224-PCMTX8 Only
Programmable run time
Programmable delayed start time
Intermittent sampling function Automatically calculates and controls on/off timing for multiple sample periods.
www.skcltd.com 224-UMTXM Issue F Page 5
(approximately one week). Also displays operating mode, battery condition and flow fault
condition. Elapsed sample time is retained on screen in the event of low battery or flow
fault shutdown.
Indicates flow fault due to obstructed tubing or excessive filter loading. Shuts the pump
down if the condition persists for longer than 15 seconds. Automatically attempts four
restarts before shutting down completely.
Sample run time programmable in minutes, via keypad and LCD screen. Pump
automatically shuts down at end of sample and elapsed run time is retained on LCD
screen.
Sample start delay time programmable in minutes, via keypad and LCD screen. Start
delay countdown display on LCD screen in operation.
General Information
1) Pump Models
224-44MTX Standard pump with simple on/off control.
224-PCMTX4 Intermediate pump with on/off control, sample hold and elapsed run time display.
224-PCMTX8 Deluxe pump with full timer control and timer display.
2) Care of Universal MTX Series Pumps
• Always use the correct SKC batteries and battery chargers designated for the Universal MTX series pumps.
• Never run the pump long term without a tube or filter medium in place.
• When carrying out sampling using long term colour change tubes always use a tandem tube holder with trap tube
(Part No. 222-3D-2 and cover 224-29T). This will prevent the aggressive fumes generated by these tubes from
entering and damaging the pump mechanism.
• When carrying out sampling using impingers always fit a trap between the impinger and pump inlet. This will
prevent the possibility of the fluid used in the impinger from entering and damaging the pump mechanism. As a
further precaution always ensure that the pump flow rate is set to below 1 litre/min before connecting the trap and
impinger to the pump inlet. For stability use the accessory mounting screws (refer to pump diagram on pages 8
and 9) to fix the impinger bracket to the front of the pump.
• The Universal MTX series pump cases are IP20 rated, they are not rated as water or splashproof and therefore
must not be used where it is possible for water to enter the pump casing.
• Universal MTX series pumps are fitted with a particulate filter which is easy to replace. For general maintenance
replace the filter every 2-3 months or if it appears dirty. New filters are white in colour (order Part No. P2240901).
Warning - Failure to follow these guidelines will void the product warranty.
Page 6 224-UMTXM Issue F www.skcltd.com
General Information
3) Non ATEX Certified Variants of the Universal Pump
The Universal pumps are also produced in a variant range which is UL certified for intrinsic safety and these pumps
are therefore not suitable for use in potentially explosive atmospheres in Europe where ATEX approval is mandatory.
Pump components vary between the UL and ATEX certified variants, therefore components must not be interchanged
between these pumps. If in any doubt please contact SKC Ltd customer services for advice.
4) Sampling Methods
This instruction manual provides the necessary information to set up and operate the Universal MTX series pumps. For
more detailed information on specific sampling methods please refer to SKC’s Step-By-Step Guide to Air Sampling
(Part No. 224-G1). To obtain a free copy please contact SKC Ltd customer services on +44 (0) 1258 480188 or
download at www.skcltd.com.
5) The WEEE Directive
This product is marked with the crossed out wheelie bin symbol, which identifies that it falls within the
scope of the EC Directive 2002/96/EC on waste electrical and electronic equipment (WEEE). At the end of
it’s useful life, this product must be disposed of in an environmentally sound way as detailed in the Directive.
Note that the battery pack must be separated from the pump and disposed of as detailed in the Batteries
Directive (see below). Please contact your local distributor or SKC Ltd for further details on how to comply
with the requirements of the WEEE Directive. SKC Ltd’s producer registration number is WEE/KH0054TQ.
6) The Batteries Directive
The NiMH battery pack supplied with this pump and any spare battery packs purchased for it, fall within the scope of
the EC Directive 2006/66/EC on batteries and accumulators and waste batteries and accumulators. At the end of the
battery pack’s life it must be disposed of in an environmentally sound way as detailed in the Directive. Please contact
your local distributor or SKC Ltd for further details on how to comply with the requirements of the Batteries Directive.
SKC Ltd’s batteries producer registration number is BPRN00454.
www.skcltd.com 224-UMTXM Issue F Page 7
Diagram of the Universal MTX Pump
20 19
1
2
3
4
5
6
7
8
109
Page 8 224-UMTXM Issue F www.skcltd.com
11
18
17
16
15
14
13
12
22
23
24
21
20
25
Key to Pump Diagram
1. LCD screen
2. Flow and battery check key
3. START / HOLD key
4. SET-UP key
5. MODE key
6. SELECT key
7. SET key
8. Flow adjust control screw
9. Anti-tamper cover retaining screw
10. On/off switch
11. Accessory mounting screws
12. Flow indicator
13. Filter housing screws (4qty)
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14. Filter O ring seal
15. Inlet protection filter
16. Inlet protection filter housing
17. Air inlet
18. Exhaust port cover
19. Low flow mode screw cover
20. Battery pack
21. Low flow mode regulator cover
22. Belt clip
23. Main case screws (4qty)
24. Battery pack charging jack socket
25. Battery pack screws (2qty)
Pump Controls Layout
Standard Control
Panel : 224-44MTX
Intermediate Control
Panel : 224-PCMTX4
INTERMEDIATE
BATT SAMPLE RUNNING BATT SAMPLE RUNNING
SAMPLE PERIOD - MINUTES
START
HOLD
FLOW
ADJ
FLOW
AND
BATTERY
CHECK
ON
OFF
Deluxe Control
Panel : 224-PCMTX8
DELUXE
SAMPLE PERIOD - MINUTES
START
HOLD
SET-UP
DIGIT
SELECT
TOTAL
ELAPSED
TIME
FLOW
ADJ
FLOW
AND
BATTERY
CHECK
MODE
DIGIT
SET
PUMP
RUN
TIME
ON
OFF
Page 10 224-UMTXM Issue F www.skcltd.com
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