SKC 224-44MTX User manual
www.skcltd.com
Universal Air Sampling Pump
Operating Instructions
This manual covers the following models:
224-44MTX, 224-PCMTX4, 224-PCMTX8
Page 2 224-UMTXM Issue K www.skcltd.com
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 a minimum service interval of one year for this product. The first service is due one year from
the date of purchase, and then at yearly intervals on this date. However, it is the responsibility of the user to
perform a risk assessment to determine the necessary frequency of servicing that is required.
Service Date Service Date Service Date
159
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
www.skcltd.com 224-UMTXM Issue K Page 1
Contents
Intrinsic Safety Information.............................................................................................................................2
Specifications ................................................................................................................................................4
General Information .......................................................................................................................................8
Diagram of the Universal MTX Pump ...........................................................................................................10
Pump Controls Layout.................................................................................................................................12
Getting Started............................................................................................................................................13
Operating the Timer (224-PCMTX8 Only).....................................................................................................16
Low Flow Sampling .....................................................................................................................................20
Troubleshooting...........................................................................................................................................22
Care of the Battery Pack..............................................................................................................................24
Universal MTX Pump Components ..............................................................................................................26
Universal MTX Pump Replacement Parts.....................................................................................................27
Universal MTX Pump Accessories................................................................................................................28
Intrinsic Safety Certification..........................................................................................................................30
Warranty Information ...................................................................................................................................36
Page 2 224-UMTXM Issue K www.skcltd.com
Intrinsic Safety Information
The Universal MTX pump range
• Complies with the EU ATEX Directive 2014/34/EU on equipment intended for use in potentially explosive
atmospheres, as intrinsically safe to EEx ia
II
C 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,
II
B &
II
C 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 2014/34/EU
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. It is the responsibility of the user to ensure that the pump is in an
acceptable condition for use in hazardous locations.
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.
www.skcltd.com 224-UMTXM Issue K Page 3
Blank Page
Page 4 224-UMTXM Issue K www.skcltd.com
Specifications
All models
• Weight: 915 g
• Casing IP rating: IP20
• Flow range:
1000 - 4000 ml/min (constant flow operation)
5 - 500 ml/min with adapter (constant pressure operation)
• 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
• Storage & operating temperature: -20°C to +40°C
• Operating humidity: 0 to 95% RH
• Compensation range:
Flow rate
(l/min)
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
1 5 - 30
2 0 - 25
3 0 - 20
4 0 - 10
131mm 57mm
133mm
www.skcltd.com 224-UMTXM Issue K Page 5
Specifications
• 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
Note:
SKC Limited reserve the right to make changes to the specification and design of this product at any time
without prior notice to the end user.
Page 6 224-UMTXM Issue K www.skcltd.com
Specifications
Pump Features
All Models
Battery charging options
SKC offer two battery charger options for the Universal MTX series pumps, a single
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.
Mains power option
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.
Anti-tamper cover The pump controls are situated beneath a clear anti-tamper cover, requiring a tool for
removal. This helps prevent tampering during a sample run.
Low battery shutdown Automatic pump shutdown in the event of a low battery condition. Prevents degradation
of battery pack due to over-discharge.
Flow indicator
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.
Particulate trap Built in replaceable filter to trap particles that would otherwise contaminate the pump
mechanism.
www.skcltd.com 224-UMTXM Issue K Page 7
Specifications
Pump Features
224-PCMTX4 & 224-PCMTX8 Only
LCD screen
LCD screen indicates elapsed sample run time in minutes up to 9999 minutes
(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.
Sample hold function Enables pausing and restarting of the pump during a sample.
Flow fault function
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.
224-PCMTX8 Only
Programmable run time
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.
Programmable delayed start time Sample start delay time programmable in minutes, via keypad and LCD screen. Start
delay countdown display on LCD screen in operation.
Intermittent sampling function Automatically calculates and controls on/off timing for multiple sample periods.
Page 8 224-UMTXM Issue K www.skcltd.com
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. 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 10
and 11) 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.
General Information
This manual suits for next models
2
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