Instruction Manual for the DSZ-38 Automatic Level

DSZ-38 Instruction Manual for Automatic Leveling Levels

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Thank you for purchasing the automatic self-leveling level manufactured by our company. To ensure optimal performance, please read this manual carefully and keep it in a safe place for future reference.

Precautions :

■This instrument is equipped with a laser light source inside the telescope. To prevent laser-induced eye injury, never look directly at the light source inside the telescope with your eyes. This instrument is 2 Laser-like products.

■ Before operating the instrument or after prolonged transportation, the leveling accuracy and display accuracy of the measuring instrument must be verified.

■ Moisture must not be allowed to penetrate the instrument.

■The instrument should not be left in a vehicle for extended periods.

■If there is a significant temperature difference between the instrument’s operating environment and its storage environment, first leave the instrument in its case until it has acclimated to the ambient temperature before use.

■The instrument must not be exposed to extreme weather conditions, as this can affect its measurement accuracy.

■Avoid any impact or dropping of the measuring instrument onto the floor.

■When transporting instruments over long distances, they must be placed inside their instrument case. During transport, care should be taken to avoid compression, impact, and severe vibration.

■This instrument must be repaired only by qualified professionals, and only original manufacturer’s spare parts may be used. Non-professionals must not disassemble the instrument without authorization to avoid unnecessary damage.

2. External Structure of the Instrument

3. Instrument Usage Instructions

3.1 Instrument Setup and Leveling

(1) Select an appropriate height and properly set up the tripod, then securely attach the level to the tripod using the central screw. ( See the figure. 2) 。

(2) Use the tripod to roughly level the instrument and securely anchor it to the ground, then rotate the foot screw handwheel. A 、 B 、 C Center the bubble ( See the figure. 3) 。

① Rotate simultaneously A 、 B The handwheel bubble moves to the right. ② Rotate C Turn the handwheel; the bubble moves downward.

3.2 Aiming and Adjustment

(1) View adjustment : Point the telescope toward a bright background or align the reticle using the coarse sight, then rotate the eyepiece focusing wheel until the crosshairs on the reticle are sharply focused.

(2) Telescope focusing : Use the focusing handwheel ( Turning forward adjusts the focus to infinity; turning backward adjusts the focus to close distances. ) Continue until the scale is clearly imaged; then rotate the horizontal fine-adjustment handwheel to bring the scale image into the center of the field of view of the object under test.  

3.3 Ruler reading

① Elevation reading : After the instrument is aimed at the leveling staff, the middle-thread reading equals the elevation. As shown in the figure. 4 As shown is 1.195m。

② Distance measurement : Read the upper and lower staff readings on the stadia rod, respectively; this gives the instrument-to-rod distance. =( Winding reading - Lower thread reading value ) times 100 . As shown in the figure 4 As shown is (1.352m-1.038m) times 100 = 31.4 m 。

③ Azimuth Measurement : Use the vertical thread of the reticle to aim at the target. A , the dial indicates the angle value α; rotate the telescope to aim at the target. B , the dial indicates the angle value β; then ∠ AOB=( alpha - beta )。

3.4 Use of Laser Level

① Charging : This instrument is equipped with 2000mA Lithium battery, equipped with Type-C Charging port: plug in the charging cable to connect to power. ( Can also be connected to a power bank. ) The instrument will then automatically begin charging, with the power indicator flashing. Once the power indicator remains steadily lit, charging is complete.

② Measurement Preparation : After adjusting the blister, 3 Within meters ( Indoor is also fine. ) When the laser spot appears as a minimum through the eyepiece after focusing, and coincides with the crosshairs on the reticle, it indicates that the instrument is in good condition and can be used with confidence.

③ Leveling : In the aforementioned state, the laser beam is collimated and focused coaxially with the telescope’s optical axis, allowing the laser spot to be precisely aimed at the target. The operator using the scale can then take and record the reading.

④ Directional measurement : Laser orientation surveying involves identifying additional points along the line connecting two known reference points. With the instrument precisely centered and leveled, accurately aim at the target and switch on the laser power. To locate other points on the line between the two reference points, simply set up a target at the desired location and adjust the laser focus. Thanks to the laser’s red visibility, the orientation survey can be completed quickly.

⑤ Button Functions :a Switch : Press once for low light, press again for high light, and press a third time to turn it off; b During shutdown, the number of consecutive buzzer beeps indicates the battery level: four beeps mean the battery is fully charged, and one beep indicates a low battery. A warning tone will sound when the device is powered on. (20 Rings once every second ) Then it needs to be charged; c Press the power button, and in 10 The device will automatically shut down after a few minutes; press and hold the button until you hear a “beep” to disable the auto-shutdown feature.

* After the laser beam is reflected through multiple lens elements, localized faint spots may appear around the laser spot; this is a normal phenomenon and does not affect normal operation.

** Do not look directly at the laser beam from the front of the instrument to avoid eye injury.

4. Instrument calibration

The instrument has been rigorously calibrated in accordance with standards prior to shipment; however, prior to use, the circular bubble level and zero position must still be checked and adjusted.

4.1 Level vial inspection and adjustment

1. After centering the circular level bubble, rotate the telescope. 180 Degree, the blister should be in the center. ( As shown in the figure. 6 As shown ) This constitutes qualification.
2. 
3. If the blister is not centered ( As shown in the figure. 7) then adjustments are required.

Rotate the foot screw handwheel to move the bubble toward the center of the graduation circle by the amount of eccentricity. 1/2( As shown in the figure. 7) 。

4. Another One half Use an Allen wrench. ( (Random accessory) Adjust the two bubble adjustment screws to center the bubble within the graduation circle. (As shown in the figure.) 8 )

(5) Repeat the above steps until the circular bubble no longer shifts as the telescope mount rotates. ( Figure 6) 。

4.2 Zero-point calibration

(1) At a distance of 50m Erect two rulers at the two points. A 、 B , place the instrument in the middle position. ( Figure 9) . Level the instrument, and... A 、 B The scale readings are as follows: a ₁ and b ₁ then A 、 B Elevation difference of two points △ h=a ₁-b₁

(2) Move the instrument to a distance of A Ruler 1-2m place, ( As shown in the figure. 10) . Level the instrument, and... A 、 B The scale reading is a ₂、 b ₂, , if

| (a ₂-b₂ )- (a ₁-b₁)| less than or equal to 3mm This indicates that the line of sight is level, so no correction is necessary; otherwise, correction should be performed as described below.

(3) As shown in the figure. 10 As shown, aim B Ruler, remove the dust cover, and use a correction needle. ( Random Attachment ) Adjust the calibration screw of the reticle. ( Figure 11) To enable reading B Ruler reading b 3 =a ₂- △ h . Repeat the above steps until |(a ₁-b₁ )- (a ₂-b₂)| less than or equal to 3mm Until then. Alternatively, make adjustments in accordance with the measurement specifications.

4.3 Laser Calibration

If the laser spot is found to be out of sync with the focus adjustment or does not coincide with the reticle crosshairs, adjustments must be made by technically trained personnel who are familiar with the instrument’s structure and have relevant repair experience, or the instrument must be sent to the manufacturer for repair. Unauthorized disassembly of the measuring instrument is strictly prohibited.

5. Instrument Maintenance and Care

The instrument shall be meticulously maintained and serviced to ensure its accuracy and operational efficiency.

(1) After completing the measurement work, clean all surfaces of the instrument thoroughly and place it in the instrument case.

(2) The surfaces of optical components should be cleaned with a soft-bristle brush and lens paper; touching the lenses with your fingers is strictly prohibited.

(3) If the instrument malfunctions or is damaged, it must be inspected and repaired by technical personnel who are familiar with its structure and have relevant repair experience, or it must be sent to the instrument manufacturer for repair.

(4) A desiccant packet is provided in the instrument case; if it loses effectiveness over time, it can be dried by baking before reuse or replaced with a new packet.

(5) The instrument should be stored in a dry, clean, and well-ventilated location.

6. Attachment

6.1 Random attachment:

(1) S = 2 mm Hex key          1 only

(2) Correction needle                     1 only

(3) Lens cloth                     1 piece

(4) Charging cable                   1 Root (laser instrument included)

6.2 Accessory Selection:

A variety of accessories are available for customers to choose from, including metal tripods, wooden tripods, metal leveling rods, wooden leveling rods, survey poles, survey ropes, plumb bobs, and more.

※Due to ongoing product improvements, any changes to the appearance or specific structural components will be made without further notice. We appreciate your understanding.

Harbin Optical Instruments Factory Co., Ltd.

HARBIN OPTICAL INSTRUMENT FACTORY LTD.

ground   Address: Jingwei Third Road, Daoli District, Harbin City 32 Number

Post   Editor: 150010

Electricity   Words: 400-030-0319         0451-84286338      

network   Address: www.hrboptical.com           

E-mail： hopt@hopt.cn