Tvoc Setup; Selector Pins - ION TVOC Instrument User Manual

TVOC MANUAL
4

TVOC Setup

4.1 Selector Pins

TVOC has a number of settings that can be selected by the user
via a row of 4 selector pins mounted on the reverse side of the
main PCB. Diagram 4.1 shows the location of the functional
selector pins labelled - A, B, C & D.
The selector pins absence or presence determines the chosen
setting.
TVOC is shipped with all 4 selector pins fitted as shown in
diagram 4.2.
Diagram 4.2
Diagram 4.3 demonstrates the removal of 1 selector pin.
Diagram 4.3
The following table shows the selector pin combinations and the corresponding function.
= Selector pin fitted
 = Selector pin removed
Selector pin
A B
(n/a) 
(n/a) 
(n/a) x
(n/a) 
(n/a) 
(n/a) x
Selector pin 'B' and 'C' selects the ranges
Selector pin 'D' selects the units
Selector pin 'A'
C D
 
x

 
x

x x
x

Range Displayed units
1000 ppm
100 ppm
10 ppm
3
2280 mg/m
3
228 mg/m
3
22.8 mg/m
- 10ppm, 100ppm or 1,000ppm
- ppm' or 'mg/m
- Currently not used
Page 9 of 28
Diagram 4.1
Diagram 4.1
(Default)
3
Ion Science Ltd