≪Precision Electronic Level≫

Compact Analog Level Gauge
EL-01ALEVELNIC Owners Manual

Thank you for purchasing Niigata Seiki LEVELNIC.
Please read this manual thoroughly before use to insure proper operation and a long service
life.

[CONTENTS

Introduction
Features]･･･････････････････････････････････････ ２･･･････････････････････････････････････････ ２Part Identification ･･････････････････････････････････３

Description ････････････････････････････････････････

４

How to Use

７････････････････････････････････････････

Zero-Point Setting
Leveling a Surface･･････････････････････････････････

９･････････････････････････････････ １１

Shipping ･･･････････････････････････････････････････ １３
Notices････････････････････････････････････････････ １４Specifications･･････････････････････････････････････ １５-1-

[INTRODUCTION ]This high precision electronic level uses the displacement of a pendulum to determine angleof inclination. Displacement is converted to an electronic signal for output, and is also
displayed as inclination (mm/m) on the analog display.

[FEATURES]◎ Differential transformer technology for high sensitivity and stable output.

◎ Instrument sensitivity is switchable between three levels.

(0.01mm/m、 0.05mm/m、 0.1mm/m.)◎ Can measure a wide range of slope angles compared to a bubble level.

（±0.20 mm/m、 ±1.00 mm/m、 ±2.0 mm/m）◎ Fast response compared to bubble level.

(Full range response time approx. 10 sec.)◎ Analog output signal can be connected to a standard chart recorder, panel meter, etc.

◎ Power using battery or AC adapter.

-2-

[PART IDENTIFICATION ]（1） Handle（2） Secondary Bubble Level（3） Display Meter（4） Power Switch（5） Sensitivity Knob（6） 0-Adjust Knob

（7） Battery case（8） Base（9） Power Jack
（10） Signal Out-3-

[DESCRIPTION ]（1） Handle
Folding handle for use when carrying the instrument.

（2） Secondary Bubble Tube (Spirit) Level
For checking the instrument is level in the roll direction (perpendicular to themeasurement axis.)（3） Display Meter
Displays the measured angle and battery voltage level.
Angle of inclination (display reading X sensitivity) is shown up to 20 units to the left orright. Sensitivity can be selected with the Sensitivity Knob as 0.01mm/m、0.05mm/m、or0.1mm/m.
Battery voltage level can be checked using the Sensitivity Knob.
If the needle points within the green line to the right, then battery level is good.

（４） Power Switch
Push-button switch toggles between ON and OFF each time it is pressed.

（５） Sensitivity Knob
Selects the sensitivity setting, and can check battery voltage.
Sensitivity can be switched between 3 levels:
Range Ⅰ： １ division = 0.01mm/m （full scale range ±0.20mm/m）
Range Ⅱ： １division = 0.05mm/m （full scale range ±1.00mm/m）
Range Ⅲ： １division = 0.1mm/m （full scale range ±2.0mm/m）-4-Battery voltage can be checked by setting the Sensitivity Knob to "Battery Check" andreading the display. If the needle is within the green line to the right, then voltage is good. Asthe battery voltage drops, the needle will move left and once it is outside the green area
replace the battery or switch to the included AC adapter.

Green area

Display
Battery OK

Replace Battery（６） 0-Adjust Knob
For setting the zero-point of the gauge.
Use it to set the display to 0, or to halve the display value when setting zero-point before
measuring.

（７） Battery CaseHolds the battery.
Use the groove at bottom to pull out and lift toremove battery.

（８） Base
The instrument has two M5 screw holes on the base for attaching fixture or custom baseas needed for special measurement situations.
The screw holes are spaced at 130mm, and are 8mm deep.

（９） Power JackPower input for connecting the supplied AC Adapter.
When the AC adapter is connected, the Battery is automatically disconnected from theinstrument circuitry.
-5-（１０） Signal Output
Analog signal output for connecting a standard chart recorder, digital panel meter, meter
relay, A/D converter, etc. or any device that accepts analog inputs.
For all three ranges (I, II, III) each division is 10mV, and full scale output is ±200mV.
Range Ⅰ：

１ division = 0.01mm/m → 10mV

Range Ⅱ：

１division = 0.05mm/m →10mV

Range Ⅲ：１division = 0.1mm/m→10mV

When the right side of the meter is elevated as seen from the front, the needle will movetoward the right (green line) and output voltage will be positive.
When the left side of the meter is elevated as seen from the front, the needle will movetoward the left (opposite the green line) and output voltage will be negative.
Connected Load impedance should be 100Ω or greater.
For accessories such as chart recorder, panel meter, A/D converter, etc. this value will belisted in their specifications as input impedance, internal resistance, load resistance orsimilar name.
Audio type mini-plug for connecting to meter.

Two conductor, or mono-type（1）OUT（2）GND(Signal)Three conductor, or stereo-type（1）OUT(Signal)（2）NC(Not used)（3）GND

Note: When Sensitivity Knob is switched to "Battery Check", the voltage output will reflect
the needle position in the same manner as it does for measurements.

-6-[HOW TO USE ]This is a precision instrument. Please handle with care and avoid any shock ormishandling.

Before use, wipe the instrument base and the surface or object to be measured using asoft cloth or lens cloth moistened with mineral spirits or alcohol to remove any grease andcontamination.
Place the instrument on the surface to be measured.
Turn on the meter by pressing the Power Switch.
For best results, wait about 20 min. after power on for internal circuitry to stabilize.
The zero-point will shift up to 0.01mm/m when first turned on as the system warms up. If
this level of precision is not needed, you can begin measurements as soon as it is turnedon.
Make sure there is no difference in temperature between the instrument and the object tobe measured.
For highest precision, we recommend that all measurements are performed in atemperature controlled room, following the standard practice used for all precision
metrology.

After use, protect the base of the instrument by coating with rust-preventive oil beforestorage.

When viewed from the front, if the right side is elevated, the needle will point to the right. If
the left side is elevated, the needle points to the left showing the angle of inclination.

Display-7-

The Gauge will display the angle of inclination as mm/m, which is the elevation for thesurface over a distance of 1 meter.

mm Reading
1m

The actual height difference over a specified distance or pitch can be calculated as follows:

Pitch
Height Difference over Pitch = Reading

×1000

[mm]

For the example with the measurement pitch = 100mm,100Height Difference over Pitch= Reading

×= Reading× 0.1-8-1000
[mm]

[mm]

[ZERO-POINT SETTING ]The instrument does not have a preset absolute zero-point..
When first turned on, a reading of zero will not necessarily indicate that the gauge is at true
horizontal position. If a zero-point is required, it must be set each time the instrument isswitched on.
In this way, calibration error is eliminated and the zero-point is set accurately each time.
Setting the zero-point to true horizontal is accomplished using the 0 adjust and 1/2
adjustment procedures.
If the reference surface is outside the adjustment range of the instrument, the zero-point can
not be set and the surface level must be moved to within the adjustment range.
A） For comparing relative slope of different surfaces.
（１） Place the instrument on the surface to be used as the reference.
（２） When the display has settled, adjust the 0-Adjust Knob to set the display to zero.
A relative zero-point has now been set for use in comparative angle measurements.

B） If there is a true horizontal reference surface available.
（１） Place the instrument on the surface to be used as the reference.
（２） When the display has settled, adjust the 0-Adjust Knob to set the display to zero.
Zero-point has now been set for absolute measurements.

C） If surface is not known to be level.
（１） Place the instrument on the surface to be used as the reference.
（２） When the display has settled, adjust the 0-Adjust Knob to set the display to zero.
（３） Rotate the instrument 180° in the same spot on the surface.
（４） When the display has settled, turn the 0-Adjust Knob to reduce the display readingby 1/2 .
Zero-point is now set at true horizontal.
The display will show the absolute tilt of the surface the instrument is on.
If the reference surface is not level in the roll direction, (perpendicular to the measurementaxis) there is a possibility of introducing some error to the measurement so make sure thesurface is first leveled to reduce roll.

-9-≪ Calibration using 0-adjust and 1/2-adjust procedures.

≫The zero-point reference is set without an absolute reference by using the direction ofEarth's gravity for reference. This can be understood from the following procedure.
Suppose a slope having an angle θ with respect to the horizontal plane.
Place on that slope a board with a weight suspended on thread.
The weight will move toward side A of the board at an angle θ from the line perpendicular tothe slope.
When the board is turned 180°, the weight now moves toward side B of the board by angle θfrom the line perpendicular to the slope.
Using this method, even without a true horizontal reference, we can determine the value ofthe angle 2×θ, where θ is the angle of the slope in reference to the horizon.
By dividing by two, we can determine θ, the tilt of the slope.
If the gauge is set to zero on a slope, then when the gauge is rotated 180° it will show theangle twice the actual angle of the slope.
If the reading is then halved, it will show the angle of the slope, and by adjusting the slope
until that reading is zero, we can adjust the surface to horizontal.
Using this method for setting the horizontal reference, the reference set is always accurate
and the gauge reliable. For an instrument with built in reference, there is chance that it will
be inaccurate and yet will continue to be used without knowing of the deviation.

WeightGravity
WeightGravity-10-

[LEVELING A SURFACE]

Leveling in one direction.

（１） Place the instrument on the surface or object to be measured and check the level inthe roll direction using the secondary bubble tube level. Adjust the 0-Adjust Knob to set
the display to zero.
If the display can not be adjusted to zero, the surface may be outside the adjustment
range. Adjust the position of the surface to get it it within the range of the instrument.

（２） Rotate the instrument 180°, and check the secondary bubble tube to make sure it
reads the same. Turn the 0-Adjust Knob to reduce the display reading by 1/2 .
If the secondary bubble tube reading has changed, then the tilt in the roll direction may
have shifted introducing an error to the operation. Adjust the surface being measured toprevent shift before repeating.

（３） Adjust the tilt of the surface to make the instrument's display read zero.
（４） Rotate the instrument 180° again, to confirm that the reading is zero and the surface
is level.
If it does not read zero after rotating, then repeat steps (1) ~ (4) above.

0 adj.

½ adj.

adjustsurface-11-

Leveling in two directions （X、Y direction）(1) For one direction, (for example the X-direction,) follow the above procedure for “Levelingin one direction.”(2) Repeat the procedure for the other direction (the Y-direction.)(3) When adjusting in one direction, it is possible that the perpendicular direction will beaffected and no longer level. It may be necessary to repeat steps (1), (2), several times tobring the two axis into level.
When the reading is zero for the level placed in any position, the surface is level.

-12-[SHIPPING ]This is a precision instrument. When carried or shipped, care must be taken to avoiddamage. Please be careful not so subject instrument to shock, vibration, or excessive forces
when shipped.
Hand Carrying
Always transport in supplied case.
Transport in upright position and not on side or upside down.
When transporting in automobile, please put on passenger seat and minimize vibrationand shock to instrument.
When moving, keep the instrument upright.
Sipping via Truck or Carrier
Please prepare a shipping box with internal size approximately 10cm larger than thestorage case in all dimensions.
Place the instrument in the storage case, and place the case in the box with all sides
protected with appropriate packing material (such as shredded paper or similar
cushioning material.) Pack with enough material to ensure the case will stay centered in
the box and will be protected from shock.
The case should be right-side up, and the box marked to insure the box is kept uprightduring shipping, and not on side or upside down.

Shipping Box
Packing
Material

Storage Case
※ Protect all six sides from shock with 5cm of packing material.

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[NOTICES ]This is a precision instrument, handle with care. While in use and during transport,
protect from excessive shock, vibration, or excessive force to the main body or to themeasuring surface.
The measuring base is critical component for accurate measurements, use care toprotect from corrosion.
After use, clean any rust or dirt from instrument and apply rust preventive oil to thebase before storing in the case.
If not used for a long period, remove battery.
Store in cool, dry location out of direct sunlight, and protect from high humidity or
severe temperature changes.
Make sure surface to be measured is free of any dirt or burrs which may cause
damage to measuring surface.
Keep away from magnets and strong magnetic fields.
When used in a support capacity for other equipment, it can easily be damaged;please use care to avoid scratches or corrosion.
Do not modify or use for purpose other than original intended use.

-14-[SPECIFICATIONS]

Model .......................................EL-01A
Sensitivity .................................Ⅰ：１Division = 0.01 mm/m
Ⅱ：１Division = 0.05 mm/m
Ⅲ：１Division = 0.1 mm/m
Measurement Range ...............Ⅰ：±0.20 mm/m
Ⅱ：±1.00 mm/m
Ⅲ：±2.0 mm/m
Operating Temp. range..............0～40℃
Accuracy ....................................Within ±0.5 Division
Repeatability ............................Within ± 0.005 mm/m
Output Signal ...........................Analog output voltage±200mV / full scale （for each range）≥ 100Ω load

Output drive capability
Power .......................................9V(standard 9V battery - JIS S-006P） (１x)AC100V adapter
Continuous Use Time（※1） ....Zinc-Carbon battery - approx. 25 hours.
Alkaline battery - approx. 50 hours.
Dimensions ..............................150 (L) × 85 (W) × 195 (H) mm （not including handle）
Base Dimensions .....................150 (L) × 55 (W) mm
Weight ......................................2.9kg
Accessories ..............................AC100V Adapter
9V Battery
Storage Case
Owner's Manual（※1） Slight variation depending on usage conditions.

NIIGATA SEIKI CO., LTD
6-15-22, Tsukanome, Sanjo-city,
Niigata 955-0055 JAPANTEL: 0256-31-5670-15-