Gummerson Tools GT1004 User Manual

DIGITAL LEVEL
(GT1004)
User's Manual

DESCRIPTION

This digital level is a highly versatile leveling tool
designed for fast, easy operation by carpenters,
stonemasons, bricklayers, other building trades
workers, surveyors, millwrights and other
metalworkers, and in some photographic or video
work, particularly in civil engineering applications,
such as building construction and steel structure
erection, for on-site angle alignment and leveling.

Technical Data

Measuring range of digital display: 4×90°
•
Resolution of Digital Display: ±0.05°
•
Precision of Digital Display : ±0.1° at 0° &
•
90°; ±0.2°at other angles.
Unit of measurement °degrees, % percent,
•
mm/m & IN/FT - (in 1/8"/feet increments)
Selectable audible indicator
•
Hold function
•
0°calibration
•
"V" base to help measure round surfaces
•
Magnetic base
•
Battery type : 2x1.5V LR03 AAA batteries
•
Working temperature: 0°C – 40°C
•
Storage temperature: -10°C - 50°C
•
Dimensions: 254x27x59mm
•
Weight: 367g
•

OPERATION INSTRUCTIONS

1. Battery replacement

Remove the 4 screws to open the battery
compartment cover.
Insert the two LR03 AAA batteries, observing the
correct polarity as indicated in the compartment,
then screw the cover back in place, taking care that
the rubber seal is in contact with the cover.

2. Powering ON/OFF

Press the " " button to turn on the device.
Press the button again to turn off the device.
(After about 3 minutes of non use the device
powers off automatically.)

3. Measuring

Turn on the device and place it with the "V" grooved
base on the surface to be measured.
This way
Not this way

4. Mode Selection

Pressing the "MODE" button changes the display
modes from degrees (°) to percent (%), to
(mm/m), to pitch (IN/FT). The "
the current angle's position, relative to the
horizontal or vertical position.

5. Relative or absolute angle measurement

The "Ref" button will set the current angle to zero
thus allowing measurement of angles relative to
that angle. Pressing the button again returns to
the "Absolute" measurement mode.

6. Audible buzzer

Pressing the " " button for a short time enables
an audible indication when the device is either
exactly horizontal or vertical.

7. The Hold function

Pressing the "HOLD" button with save the current
angle on the display until the button is pressed
again or the device is turned off.

8. Low battery indicator

Replace the two AAA cells when the "
on the screen.

9. User calibration

The device is calibrated in the factory but may be
recalibrated by the user if felt necessary.
1. With the device turned OFF, press and
hold the "CAL" and then press the "
button, release when the display shows
"CAL";
2. a) Place the device on a flat and clean
surface, press the "CAL" button once
and the screen should show "CAL1";
b) Rotate the device (180°) parallel to the
surface in the same location, then press
the "CAL" button again, the display will
show "CAL2".
3. Turn off the device which is now
calibrated.
" shows
" shows
"