Calib rtmodule dp meas, Dp meas mode: none l-r l+r – Ashcroft ATE-100 Handheld LCD Digital Calibrator User Manual

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Revision 4.6 3/2004

Section 21.3

Setting Up Dual Module Summation

Pressure Measurement

Step 1

With the calibrator off, install the two Quick

Select pressure modules in the calibrator. As this is a
summation process the modules may be in either
sensor bay.

Step 2

With the modules installed, turn the calibrator

on by pressing the on/off key.

OFF

Step 3

With the calibrator on and displaying pressure

measurement data from the two installed Quick Select
modules press the Set Up key.

SET

Step 4

Using the up/down and left/right arrow keys

locate the section of the set up menu that includes dp
measurement set up. This menu will appear on the cali-
brator screen as follows:

Calib Rtmodule

dp Meas

Step 5

Use the arrow keys to highlight the text “dp

Meas”. When highlighted the text will flash on the dis-
play.

Calib Rtmodule

dp Meas

Step 6

With the text “dp Meas” flashing press the enter

key.

ENT

The calibrator will respond with the following:

dp Meas Mode:

NONE L-R L+R

Step 7

To perform pressure measurement using the

dual sensor summation mode select “L+R”; to exit this
dp set up and return to basic pressure measurement
select “nOnE”. To proceed, with use the arrow keys to
select the text “L+R”

dp Meas Mode:

NONE

L-R

L+R

Step 8

With the text “L+R” flashing press the enter key.

ENT

After pressing the enter key the calibrator will return to
basic pressure measurement.

Step 9

To activate the dual sensor dp mode of opera-

tion press the port select key one time after the set up
has been complete. The calibrator will display the fol-
lowing text

L+R PSI PSI

xxxx

for a calibrator displaying measurement values in the psi
engineering unit.

When the dual module summation firmware is active the
following measurement sequence will result from press-
ing the PORT SELECT key

First press of the port select key:

L+R PSI PSI

xxxx

Second press of the port select key:

PSI L+R PSI

xxxx

Third press of the port select key:

PSI mA

xxxx

Fourth press of the port select key:

PSI

xxxx xxxx

Fifth press of the port select key:

PSI PSI

xxxx

The Sixth press of the port select key will return to the
first dp screen as shown below and allow repeating the
choice of available port select configurations

L+R PSI PSI

xxxx

notes on interpreting the displayed measurement values:

1 –

On a display set up with an L+R indication on one

side of the display and a straight engineering unit des-
ignation on the other side of the display the value under
the L+R designation is the resulting measurement for
the summation product of the left Quick Select measure-
ment added to the measurement value of the right Quick
Select module. The value on the opposite side of the dis-
play, under the engineering unit without the L+R prefix,
represents the pressure measurement from the Quick
Select pressure module installed in the corresponding
side of the calibrator. By using the port select function it
is possible to read the summation pressure measurement
value as well as either of the inputs independently.

2 –

Due to the length of the engineering unit designa-

tion when the d/p is expressed in a user engineering unit