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RPM4-AD™ OPERATION AND MAINTENANCE MANUAL
2.3.4
REMOTE [ENT] CONNECTION (FOOTSWITCH OR OTHER
SWITCH)
Connect the optional remote ENTER footswitch, if available or a user supplied switch fitted to
the optional cable (see Section 7.1).
connection labeled REMOTE ENTER. Closing the switch is equivalent to pressing the [ENT]
key on the front panel (see Section 3.1.3).
2.3.5
CONNECTING TO MEASURE PRESSURE (P
PORTS)
Using a pressure connecting hose or tube of appropriate pressure rating, connect the device
or system to be tested to the RPM4-AD TEST (Pt) and/or TEST (Ps) ports.
The RPM4-AD TEST (Pt) and TEST (Ps) connections are AN4 (1/4 in.) male.
See Table 3 for instructions on how to connect to the RPM4-AD TEST ports depending on
what is to be measured. See Section 5.6 for schematics of RPM4-AD TEST ports, Q-RPTs
and internal valve configurations. Typically, when testing an air data device, the air data
device Ps port is connected to the RPM4-AD Ps port and the air data device Pt port is
connected to the RPM4-AD Pt port.
TYPE OF
MEASUREMENT
Airspeed at varying
altitude (true Ps
and Pt differential
operation)
Altitude only, best
uncertainty
and
absolute pressure
Airspeed at ground
altitude only
(A160K/A160)
and
gauge pressure
Gauge pressure
or
negative gauge
pressure
RPM4-AD includes the SDS Self Defense System on both of its Q-RPTs. SDS, operated
properly, allows a the Q-RPT TEST port to be left connected to a pressure up to
10 MPa (1 500 psi) without damage to the Q-RPT. Do NOT attempt to use SDS in this
manner without first becoming thoroughly familiar with its operation and limitations (see
Sections 3.2.8, 3.3.8, 3.5.4).
© 2005-2007 DH Instruments, a Fluke Company
Connect the cable to the RPM4-AD rear panel
Table 3. Making pressure connections to RPM4-AD
RPM4-AD A160K/A160K
TEST(Pt)
TEST(Ps)
VENT
Connect to
Connect
Not used
DUT Pt
to DUT Ps
port
or altitude
port
Not used.
Connect
Not used
May be
to DUT
connected
Ps,
to DUT Pt
altitude or
port
abs port
Connect to
Not used.
Not used.
May be
May be
DUT Pt
connected
connected
port
to DUT or
to DUT or
Ps port
Ps port
Connect to
Not used
Connect
DUT (+) or
to DUT (-)
gauge port
port
(optional)
Page 8
AND P
S
RPM4-AD A350K/A160K
TEST(Pt)
TEST(Ps)
Connect to
Connect to
DUT Pt
DUT Ps or
port
altitude port
Not used.
Connect to
May be
DUT Ps,
connected
altitude or
to DUT Pt
abs port
port
Connect to
Not used. May
be connected
DUT Pt
port
to DUT or Ps
port
Connect to
Connect
to
DUT
(+)or
DUT
(+)or
gauge port
gauge port to
to measure
measure with
with
Hi
Lo Q-RPT
Q-RPT
T
VENT
Not used
Not used
Not used
Connect to
DUT
(-)
port
(optional)
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