DM4E, DM4, DM4 DL Operating Manual
Page 7
Low battery indicator:
To install batteries, loosen the two battery cover screws on the
back of the instrument and remove the battery cover.
Insert 2 “AA” alkaline batteries as shown at right. The instrument
is protected against incorrect battery installation. If the batteries
are installed with polarity reversed, no damage will occur, but the
instrument will not operate.
After batteries have been installed, replace the battery cover and
tighten the screws.
2. Operation
2.2 Displays Symbols
NOTE: When low battery indicator lights (below), re-
place batteries as soon as possible. Automatic shut-
off occurs when batteries are too weak for reliable
operation. Settings are saved and restored when
turned on. When testing in remote locations, always
carry spare batteries.
2.1 Battery Installation
2-PT 2-point calibration mode.
VEL Velocity display and callibration mode.
MIN Minimum capture mode
SPEC Special modes (DM4, DM4 DL) (Sections 2.10
through 2.13 and 2.18)
Display backlight control.
Low barery indicator. Replace batteries when
indicator illuminates as shown.
In dIF mode, reading is greater than nominal.
If HI thickness limit is on, reading exceeds limit.
(DM4, DM4 DL)
In dIF mode, reading is less than nominal. If LO
thickness limit is on, reading violates limit.
(DM4, DM4 DL)
« DIALOGIntelligent Transducer automatically
recognized
CAL Flashes when CAL key is pressed. Scrolling
keys are enabled to adjust displayed value or
control parameter.
Coupling indicator lights when satisfactory
acoustic coupling between the probe and test
piece has been achieved.
in Unit of measure of displayed value is inches
(in/µs in VEL mode).
Mm Unit of measure of displayed value is millimeters
(m/s in VEL mode).
Note:
To charge the unit of measure and display
resolution refer to Section 2.14.
THK Thickness measurement and standard 1-point
calibration mode.
THK Dual Multi “Through Coating (paint)”
SPEC measurement mode.
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