Specifications

DM4E, DM4, DM4 DL Operating ManualPage 18
3.0 Data Logger Operation
indicates a full file, no empty locations.
“nnn” (001 to 999) is the number of the selected file.
When the desired file number is displayed, press
again.
The current active location number of the selected file is
displayed briefly. Then the DM4 DL returns to measurement
mode and is ready to log readings
NOTES: When a file containing differential readings is
selected the DM4 DL switches to dIF mode and uses the
nominal value saved in the file as the current nominal value.
When a file containing HI/LO thickness limits is selected the
DM4 DL switches to THK mode and uses the limits saved in
the as the current limits.
When a file contains data collected using a DIALOG Intelli-
gent Transducer, report sent to a printer or computer auto-
matically include the model and serial numbers of the probe.
Figure 3-3
3.4 Logging Readings into Memory
Measurements taken in THK (normal), dlF (differential), and MIN
(minimum capture) modes can be stored in the Data Logger if a
file with at least one empty location has been selected (Section
3.3). The Data Logger is disabled when an external recording
device is connected to the Serial I/O port (Chapter 4).
A reading is logged by pressing
(Section 2.17). If the
current file location is empty, the Data Logger stores the reading
and briefly displays the location number, “L.nnn” (Figure 3.3) as
confirmation.
After a displayed reading has been sent, the SEND key is
disabled until a new reading is taken. Unless a valid thickness
reading is in the display, no action occurs when SEND is
pressed. Zero values will not be logged. All readings in a
given file should be stored at the same resolution to assure
accurate statistics.
Location Full:
displays when trying to log to a loca-
tion that contains a reading. No data is recorded. To select an
empty location see Section 3.5.
File Full:
displays when SEND is attempted to a file
with no empty locations. No data is recorded. To select another
file, refer to Section 3.3.
3.4.1 Recording an OBSTRUCT Value
If a measurement cannot be made or a location is inaccessible,
an “OBSTRUCT” value can be logged into the current active lo-
cation.
While in THK or MIN mode, press
with the probe un-
coupled. The location number,
, where the OB-
STRUCT was stored is briefly displayed, followed by
.
An “OBSTRUCT” is stored in the current data logger location.
When reviewing stored readings (Section 3.6) obstructed
locations display .
3.5 Selecting Locations
While in THK or MIN mode, the MEM key is used to select file
locations and review stored readings.
To select a location in the current file, press
.
The current location number is displayed as
(full lo-
cation, as in Figure 3.4) or
(empty location).
Use
or to display the desired location.
To review stored readings, proceed to Section 3.6.
To select the displayed location and return to THK or MIN mode,
press
two times.
Figure 3-4
3.6 Reviewing Stored Thickness Readings
While a location number is displayed, as in Figure 3-4, press
a second time to display the reading. Readings are dis-
played in the current unit of measure.
Use
or to view readings at other locations.
Figure 3-5