SKC Limited Universal MTX Pump Operating Instructions - Manual (Page 18)

Page 16 224-UMTXM Issue F www.skcltd.com
Operating the Timer (224-PCMTX8 Only)
9. Press the MODE key to cycle to the SAMPLE PERIOD setting option. The right hand digit will be flashing.
10. The timer is set in minute values. Calculate the required sample period in minutes - 8 hours = 480 minutes.
Thefore the right hand digit should set to 0.
11. Press the DIGIT SELECT key to select the second digit from the right.
12. Press the DIGIT SET key to increment the digit to 8.
13. Press the DIGIT SELECT key to select the third digit from the right.
14. Press the DIGIT SET key to increment the digit to 4. The digits should now read 0480.
15. Note that if a SAMPLE PERIOD time is entered, but the PUMP PERIOD is left at 0000, the pump will run
continuously for the duration of the SAMPLE PERIOD.
16. The pump is now set to start after a delay of 2 hours, run for 8 hours and then switch off. To start the
timed run press the START/HOLD key. The LCD screen will show the legend DELAYED START flashing in
the bottom left of the screen and the start delay time will count down from 120 minutes. At the end of the
start delay the pump will automatically start and the legend SAMPLE PERIOD will flash on and off in the
top right of the LCD screen. At the end of the 8 hours (480 minutes) the pump will automatically stop and
the display will show the legends HOLD and SAMPLE OVER, and the elapsed run time. Should the pump
prematurely stop during the sample period the actual elapsed run time will be displayed.
Setting an Intermittent Sample
Intermittent sampling allows a sample to be taken over a period of up to 9999 minutes (approximately one
week) and can prove extremely useful for environmental or ambient monitoring. To sample over a period of one
week and produce an average measurement, the pump is set to actually draw air for a period that the battery
can handle such as 8 hours over the 7 day period.