INSTRUCTION MANUALDIGITAL PROTRACTOR

Model No.: DP- 90G

Thank you for purchasing the Digital Protractor.
Please read this manual thoroughly before use for proper operation.

DESCRIPTIONAPPLICATIONS●Piping and equipment construction and installation.
●Roofing and exterior construction.
●Tile cutting and setting.
●Steel and civil engineering measurement andconstruction.

This angle gauge uses a liquid sensor to measure theangle of inclination of the instrument. The change inliquid level is converted to a corresponding electricalsignal and displayed on the LCD.

FEATURES), percent●Angle can be measured as: degree (°slope (%), or gradient (mm/M).
●Display will automatically flip if gauge is upside
down for easy reading of overhead measurements.
●Audible beep feature when measurement is: 0°,90°, 0%, or 0 mm/M.
●Back-light feature for reading in low light areas.
Press the [ 照明 ] Button (Light) and Back-light willturn on for approx. 1 min.
●Hold Button to allow reading when display isinaccessible. Press [ 表示保持 ] Button (Hold) anddisplay reading will hold.
●V-Groove base for measuring cylindrical surfaces.
Also, Base has four magnets for vertical or overhead
measurements on steel.

SPECIFICATIONS＊Specifications subject to change
without notice.

●Model : DP-90G●Measuring Range : ±90.0°●Resolution : Angle Display = 0.05°
Ercent Display = 0.1%
Gradient Display = 1mm/M〜 90.0°=±0.2°●Accuracy : 0.0°
●Display Stabilization Time : approx. 10 sec.
C
●Operating Temperature : 0〜50°●Batteries : 9V Battery●Dimension : L173×W47×H68mm (excluding protrusions)●Weight : 550g
●Accessories : Soft case, Manual, 9V Battery (for test)

PART IDENTIFICATION and FUNCTION
MAIN BODY〔Front〕

Digital Display〔Rear 〕

LoosenTighten

単位 切替ｍｍ/Ｍ°／ ％ ／V Groove

Battery Cover Screw

Base Reference Surface

Rotate to remove cover whenreplacing Battery.

(With 4 Magnets)

DIGITAL DISPLAY①Arrow Display (Ex:indicates angle)●Indicates direction to adjust tilt for level. Arrows display for angles
between 0.05°〜44.9°
to help in adjusting for horizontal. (In Figure,arrows are shown for example with right side of gauge elevated.)●Arrows reverse at 45.1°for use as reference in verticalmeasurements. (Gauge can be used in horizontal or verticaldirection.), 90.00°and display as straight●Arrows shrink and go out at 0.00°
bar at 45.0°②Battery Indicator
Automatically displays when battery is low.

①④②③①④③Buzzer Icon
Press [ ブザー ] Button (Buzzer) to turn on icon and buzzer will beep at 0°, 90°, 0% and 0mm/M. Press again todisable buzzer.

④°, ％ , mm/M Icon), percent slope (%), or gradient (mm/M).
Indicates display angle is in degrees (°−１−PART IDENTIFICATION and FUNCTION (continued)OPERATION BUTTON⑤Display Switching Button),
Changes display angle - degrees (°percent slope (%), or gradient (mm/M).

⑥ON/OFF Button (Power Button)
Press to turn on power, press again toturn off.
Power will turn off automatically ifgauge is idle for about 6 min.

⑦Buzzer Button
Press once and buzzer will beep at 0°,90°, 0%, 0mm/M. Press again todisable buzzer.

⑤⑥ ⑦⑧⑨ ⑩⑧Calibration / Zero Button
For use when calibrating horizontal and vertical setting, and for setting an angle as Zero-Point. (Please refer to:“Setting Zero,” and “Calibration” sections below).
⑨Light Button
Press once to turn on back-light, press again to turn off.
Light will turn off automatically in about 1 min.

⑩Display Hold Button
Press once to hold value on display. Press again to release value and resume measurements.

OPERATION
ACCURACY CONFIRMATION
1. Make sure Base Reference Surface is clean and free of adheredcontamination or dents.
2. Press the [ON/OFF] Button to turn on, and check icon to confirm proper
units ( °, %, mm/M).
〔Horizontal Accuracy Check〕(Figure:1)
3. Place gauge on a horizontal surface and turn on the power. After display
has stabilized, rotate 180°at the same position. When display is stabilized,
the reading should be same as before to confirm accuracy.
(If readings are withing normal range of instrument error of ±0. 2°)〔Vertical Accuracy Check〕(Figure:2)
4. Place gauge on a vertical surface with display side up, and turn on thepower. After display has stabilized, rotate gauge 180°in horizontal
direction at the same position, keeping the display on the upper portion.
When display is stabilized, the reading should be same as before toconfirm accuracy.
(If readings are withing normal range of instrument error of ±0. 2°)＊If accuracy checks, gauge is ready to take measurements.

(Figure:1)(Figure:2)

SETTING ZERO AT ARBITRARY ANGLE＊Zero Point can be set at any angle of inclination.
1. At desired angle, wait for display to stabilize and press the [ 表示保持]Button (Display Hold).
2. When the display blinks, press the [校正/ゼロ] Button (Calibration/Zero).
This angle is now set as zero.
3. Press [表示保持] Button (Display Hold) again to cancel this setting.
−２−OPERATION (continued)
CALIBRATION＊Calibration is required if accuracy check error is greater than ±0.3°, or under certain conditions:●If instrument is subject shock or vibration, or large changes in temperature.
●If battery is removed, as when gauge is not used for a long time.
＊Full calibration procedure of steps 1 to 17 below must be performed. Follow the figures, and us the display “UP”
text as a guide.
〔Horizontal Calibration〕
1. Place the Base of the Gauge on a clean, flat surface which isroughly horizontal and press the [ON/OFF] Button to turn on.
2. After about 15 seconds, press the [校正/ゼロ] Button(Calibration/Zero) and hold for two seconds.
“CAL” will flash on display, and then display will change to “UP”←→”-1-” text.
3. After about 15 seconds, gauge will <beep>, and display will
flash “CAL1”. (Figure:3 )Display will then change to “UP” ←→”-2-” text.
4. Rotate instrument 180°horizontally, in same location on surface.
5. Gauge will <beep>, and display will flash “CAL 2”. (Figure:4 )Display will then change to “UP” ←→”-3-” text.
6. Next step is to repeat for top surface of gauge.
7. Gauge will <beep>, and display will flash “CAL 3”. (Figure:5 )Display will then change to “UP” ←→”-4-” text.
8. Rotate instrument 180°horizontally, in same location on surface.
9. Gauge will <beep>, and display will flash “CAL 4”. (Figure:6 )Display will then change to “UP” ←→”-5-” text.
＊Horizontal calibration is now complete, Continue on to perform
vertical calibration.
〔Vertical Calibration〕
10. Hold the Base of the Gauge on a flat surface which is roughly
vertical with the Display side up.
11. After about 15 seconds, gauge will <beep>, and display will
flash to “CAL5”. (Figure:7 )Display will then change to “UP” ←→”-6-” text.
12. Rotate instrument 180°horizontally, and hold to same location
on surface.
13. Gauge will <beep>, and display will flash to “CAL 6”. (Figure:8 )Display will then change to “UP” ←→”-7-” text.
14. Next step is to repeat for gauge with display in the lowerposition.
15. Gauge will <beep>, and display will flash to “CAL 7”. (Figure:9 )Display will then change to “UP” ←→”-8-” text.
16. Rotate instrument 180°horizontally, and hold to same location
on surface.
17. Gauge will <beep>, and display will flash to “CAL 8”. (Figure:10)＊Calibration is now complete.

beep

CAL１

（Figure:3）
beep

CAL２

（Figure:4）
beep

CAL３

（Figure:5）
beep

CAL４

（Figure:6）

beep

CAL５

beep

CAL６

（Figure:7）
beepCAL７

beep

CAL８

（Figure:9）−３−（Figure:8）（Figure:10）

CAUTION1. Only press [ 校正 / ゼロ ] Button (Calibration/Zero) during calibration or zero setting. Pressing at any other time willcause inaccurate measurements.
2. When battery is replaced, power will automatically turn on. This is normal operation; to turn off press the [ON/OFF]
Button.
3. Do not drop or subject to shock as it may cause poor accuracy.
4. The bottom of the instrument contains magnets, please keep from keep away from sensitive items such as
computers, watches, compass, etc. as it may cause a malfunction.
5. Do not disassemble instrument under any circumstances.

DISPLAY ORIENTATION), Display will automatically flip to make it easier to read. (Display value of about 68°＊For angle about 22°beyond 90°
Please use care when taking measurement to avoid misreading display. (Figure:11)

22°

approx.68°
Flip

6 8°

90°

6 8°

〔Angle Examples〕（Figure:11）0.00°
・After the display flips, to return to original direction,
move back toward starting angle. For angle about
22°beyond 90°in the other direction, display will
return to original orientation.
(Display value around 68°) (Figure:12)

6 8°

・If position does not exceed 90°, the display will not
flip.

6 8°

22°
Flip

（Figure:12）

CONVERSION TABLE

a. Gradient
Gradient

1/200

1/150

1/115

1/100

1/80

1/50

1/40

1/30

1/20

1/10

Percent

0.5％

0.7％

0.9％

1.0％

1.3％

2.0％

2.5％

3.3％

5.0％

10.0％

Degrees

0.3°

0.4°

0.5°

0.6°

0.7°

1.1°

1.4°

1.9°

2.9°

5.7°

Degrees

0.0°

10.0°

20.0°

30.0°

45.0°

60.0°

70.0°

80.0°

90.0°

Percent

0.0％

17.6％

36.4％

57.7％

100％

57.7％

36.4％

17.6％

0.0％

b. Angle〔Angle Diagram〕（0％）（17.6％）
90° 80°〔Gradient Diagram〕（10％＝0.1）

45°（100％）

1/10
130°（57.7％）
20°（36.4％）

1010°（17.6％）
0°（0％）＊ When displaying percent slope, gauge will display angle(0% to 100%), andreferenced to horizontal from 0°to 45°(100% to 0%).
referenced to vertical for 45.1°
to 90°

Niigata seiki Co., Ltd.
6-15-22, Tsukanome, Sanjo, Niigata, Japan, 955-0055
Tel. : +81-256-31-5670 Fax. : +81-256-39-7730

MAIL:intl.sales@niigataseiki.co.jp
URL http://www.niigataseiki.co.jp
I293-K−４−1603