Appendix A : SPECIFICATIONS (Continued)
Pressure Measurement
Selectable Ranges
mbar, kPa and inH2O
Range
- 150 mbar to + 150 mbar
-15 kPa to + 15 kPa
-60 inH
2
O to 60 inH
2
O
Resolution
0.01 mbar, 0.001 kPa, 0.001 inH
2
O
Accuracy
+/- 0.5% fsd
Temperature Measurement
Input Type
K-Type thermocouple
Range
-58°F to 1832°F (-50°C to 1000°C)*
Resolution
1°F (1°C)
Accuracy
+/- (0.3% of rdg + 2°F) or +/- (0.3% of rdg +
1°C)
* The thermocouple supplied (GK11M) has the ability to measure tempera-
tures in the -50°F to 950°F range. The 712 accepts industry standard K-type
thermocouple probes with sub-mini connectors.
COMBUSTION ANALYSIS (Continued)
5.1 Procedure
1. Turn the 709R on as outlined in section 4.1. At any time you can activate
the Backlight by holding down the Func/Backlight Key for 2 seconds. The
backlight will automatically shut off after 20 seconds to preserve battery life.
2. Ensure you have connected the Mini Pump Protection Filter assembly and
Temperature Sampling Probe complete with In-Line Filter to the Gas Sample
Port (see 3.2 or 3.4) and the 'K' Type Thermocouple Plug into Thermocouple
(T1) Socket (see 3.4). The GK11M ambient air temperature probe must be
connected to the (T2) socket. (refer to figure below for correct hookup)
WARNING
: - Ensure that the In-Line Filter hangs in a vertical position when
readings are being taken, particularly if water is visible. Failure to comply may
result in damage to the instrument.
WARNING
: - There is ONLY one correct way to connect the 'K' type thermo-
couple plug into the socket (see 2.4). Forcing the plug into the socket the
wrong way round may result in damage to the instrument.
3. Insert the flue probe into the test location of the device under test. The
probe tip should be in the middle of the flue pipe or exhaust stream. Refer to
figures 1 through 3 for typical test locations.
Mini Pump
Protection Filter
Assembly
Ambient Air
Connection (T2)
GK11M Probe
Flue Probe
Connection (T1)
In-line Filter
Assembly
Flue Probe
Tubing
