TVOC SYSTEM PLUS MANUAL
Ion Science Ltd
Page 12 of 13
Unrivalled Detection. www.ionscience.com
Spare Parts List
Part
Description
Order Number
Mini Pump
Pump 24V DC 31/Min Brey
150-175
Water Trap Filter
Polycap TF Filter
WHAT2603T
VOC Stripping Filter
Zeroing in-line Filter
150-173
Lamp and stack
Replacement PID Sensor &
lamp
1/EO-02
Flow Fail Switch (15V)
Flow Switch Range 1000
ml/min
901-001
PTFE Tubing
(available in 1 metre
lengths)
PTFE tubing 6mm OD 4mmID
TUBE-06
Maintenance
Flow Fail Switch
The flow switch is factory pre-set to fail at 200cc’s. This setting can be checked with a
Multimeter using the SET terminal on the flow switch which should give a reading of 2.6V
at the 200cc rate. The SET terminal is marked ‘S’ on the drawing below and is located
between the DC Supply terminals.
The flow failure rate can be changed if required depending on the circumstances of the
sampling regime.
For example an adjusted reading of 3.5V will give an approximate flow fail at 500cc’s..
When adjusting the flow fail rate the results should be verified for accuracy with a
calibrated air sampling pump.
