Ashcroft ATE-100 Handheld LCD Digital Calibrator - Manual (Page 28)

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Revision 4.6 3/2004
Step 4 next, press the port select to deactivate the
display of flow measurement data on the side that
you wish to maintain displayed measurement data in
terms of ft/min. A pressure display is deactivated when
it is replaced by a milliamp (mA), Voltage (V) or a
blank (------).
See Section 5.0 for details on the port select function.
In this case we have decided that the left side of the
display will be in meters/second and the right side will
remain in ft/min.
Pressing the port select one time will deactivate the left
pressure display converting it to an mA measurement
field. Pressing the port select a second time will deacti-
vate the right side, converting it to an mA measurement
field and returning the left side of the display to the
function of flow measurement.
Since we want the right side to remain ft/min we will
deactivate it in the ft/min mode by pressing the port
select key once.
PORT
SEL
The HHC will respond with the following display:
ft/min mA
+12345 +1234
Step 5 With the right side deactivated from flow mea-
surement activities press the engineering unit key.
ENG
UNIT
The HHC will respond by displaying:
ft/min ft/sec
MPH MeterSec
Step 6 Using the arrow keys select the desired engi-
neering unit for the data on the left side of the display. In
this example we have opted to display the flow measure-
ment data on the left side in terms of meters/second rep-
resented by MeterSec on the display. With the MeterSec
engineering unit selected the display will look as follows
with the text “MeterSec” flashing:
ft/min ft/sec
MPH MeterSec
Step 7 With the text “MeterSec” selected and flashing
press the enter key.
ENT
The HHC will respond by displaying the following:
MeterSec mA
+12345 +1234
Step 8 Reactivate the right side of the display for
flow measurement by pressing the Port Select key, as
required.
First press of the
PORT
SEL
HHC will respond by displaying the following:
mA ft/min
+1234 +123456
Second press of the
PORT
SEL
HHC will respond by displaying the following:
MeterSec ft/min
+1234 +123456
To Exit Flow Measurement and Return to Basic Pressure
Measurement Press the Clear Entry Key (CE).
Using this process, any engineering unit may be selected
for display of the right or left Quick Select module mea-
surement data.
Section 14.7 Simultaneous Display of
Measurement Data for Flow
(Volume or Velocity) and Pressure
The HHC can simultaneously display a flow measure-
ment from one installed Quick Select pressure module
and a pressure measurement from a second installed
Quick Select Pressure module. For example, the mea-
surement of flow can be displayed in ft/min for one
installed Quick Select pressure module and the second
installed pressure module can be used to simultaneously
display the measured value in terms of inches of water.
This ability eliminates the need for “on-the-fly” change
between flow and pressure measurement functions when
doing airflow testing.
To set the HHC up to present simultaneous display of
pressure and flow (velocity or volume) data follow the
steps below.
Step 1 With the HHC on and displaying pressure
measurement data from both modules, if necessary,
select the desired engineering unit to be displayed for
the pressure measurement. This is done by activating the
Engineering Unit library accessed by pressing the EnG