GrayWolf IAQ SURVEYOR II, Operating Instructions Manual

Page: 45 / 100

45
MAN IAQ Surveyor Issue 11 2004
3. MICROMANOMETER AND THERMOCOUPLE
3.1 GENERAL
The IAQ Surveyor PRO, but not the IAQ Surveyor II, has a
built-in Micromanometer and type k Thermocouple socket.
The Micromanometer can be used to measure differential
pressure or, in conjunction with a pitot static tube, to provide
a direct indication of velocity and volume
fl ow rate.
3.2 THERMOCOUPLE
Any Type k thermocouple or thermocouple probe may be
connected to the thermocouple socket. Simply connect the
thermocouple probe to the instrument and locate the probe in
the environment to be measured. The instrument can display
temperature in the range -80
o C to +1100 o C.
3.3 MICROMANOMETER
3.3.1 General
Differential pressure is applied between the two input
ports (
+VE
and
-VE
, see Section 3.1) and the resultant
measurement is displayed in user selected units. The
instrument is factory calibrated using a deadweight tester
which is designed to accurately apply a pressure differential
between the two ports. Note that if a negative pressure
differential is applied to the
+VE
port the measurement
accuracy may not be within speci fi cation.
External
Equipment
Socket
Thermocouple
Socket
+VE Port -VE Port