Test Products International 709 - Manual (Page 8)

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
3.4 Top View
T1 T2
P (+) P (-)
Gas Sampling Port
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 Sample Port Connection for Gas Sampling Probe (see 5.2)
P (+) Port Connections for Pressure Tubing (see 6.2)
P (-) Port Connections for Pressure Tubing (see 6.2)