Test Products International 708 - Manual (Page 9)

3.3 Side Views
Exhaust Port Port for connection of Exhaust Adapter
Infrared Window Window for sending stored data to IR Printer
(see 9)
Rubber Boot Protects the instrument from accidental damage
Exhaust
Port
Infrared
Window
Rubber
Boot
T1 Socket Connection for thermocouple plug on flue
probe (see 5.2)
Connection for any 'K' type thermocouple
probe (see
6.1)
T2 Socket Connection for any 'K' type thermocouple
probe (see 5.2 & 6.1)
Gas Sampling Port Connection for Gas Sampling Probe (see 5.2)
3.4 Top View
T1
T2
Gas Sampling Port