10. Program

10.2 Example of Programming 2 (Offset adjustment)

The resistance temperature detective itself has an built-in error, therefore an offset error may occur

in temperature conversion data. An offset error occurs due to the change with the passage of time

also. An example of correction by programming in this case is shown below.

However, because an actual offset value is not always a specified value, it cannot be corrected

completely. The offset error refers to the deviation of any temperature conversion data from the

reference value(Note) in a specified rate. (The offset error means the constant deviation from the

reference value.)

Example of offset

Temperature conversion data

+ side offset

A

A

Reference value

EH-150 temperature conversion data

- side offset

Note: Measure a reference value using a measuring device with a higher accuracy than EH-PT4. Or connect a resistor with a high accuracy instead of the resistance temperature device and obtain a direct offset error. For the relationship between the temperature and resistance, see Table 7.2.

A: Offset error

Temperature(ºC)

(1)Adjustment procedure

(a)Decide whether an offset error is on + or – side toward a reference value.

(b)Obtain a temperature conversion data corresponding to offset error.

Offset error

Temperature conversion data

1 ºC

H0028 or H002C

2 ºC

H0050 or H0054

3 °C

H0078 or H007C

4 °C

H00A0 or H00A4

5 °C

H00CC or H00D0

(c)If offset error is on + side toward the reference value, subtract the value obtained in (b) from the temperature conversion data. If it is on – side, add the value obtained in (b) to the temperature conversion data.

(2)Example of programming (The configuration is the same as the example of programming 1)

If the channel 2 has + 2 °C offset, subtract H0050 from the temperature conversion data WX0042.

WR0000 = WX0040

WR0001 = WX0041

WR0002 = WX0042 - H0050

WR0003 = WX0043

10-4

Page 33
Image 33
Hitachi EH-150 manual Example of Programming 2 Offset adjustment, Offset error Temperature conversion data

EH-150 specifications

The Hitachi EH-150 is a robust and versatile hydraulic excavator, designed to meet the demands of various construction and mining environments. Known for its reliability and advanced technology, the EH-150 is a favorite among contractors looking for efficiency and performance.

One of the standout features of the Hitachi EH-150 is its powerful engine. It is equipped with a fuel-efficient diesel engine that provides ample horsepower for heavy-duty tasks while maintaining lower emissions. This not only ensures compliance with environmental regulations but also contributes to reduced operating costs over time.

The hydraulic system of the EH-150 is engineered for optimal performance. It utilizes advanced hydraulic technologies that allow for precise control and enhanced responsiveness. The system is designed to minimize energy loss, ensuring that more power generated by the engine is converted into effective digging and lifting capabilities. This feature significantly improves productivity on-site.

The excavator boasts a spacious and comfortable cab that enhances operator ergonomics. It includes adjustable seating, air conditioning, and large windows that provide excellent visibility, enabling operators to work efficiently and safely. The user-friendly controls are intuitively laid out, allowing for easy operation and reducing downtime caused by operator fatigue.

Another notable technology integrated into the Hitachi EH-150 is the machine's monitoring system. This system provides real-time data on performance metrics, fuel consumption, and maintenance needs, helping operators and managers to make informed decisions about the machine's operation. This feature not only aids in maximizing productivity but also in extending the lifespan of the equipment.

Durability is another key characteristic of the EH-150. The excavator features a sturdy track and a reinforced frame, designed to withstand the rigors of demanding jobsites. Its heavy-duty undercarriage provides stability and support, allowing it to operate effectively on uneven terrain.

In summary, the Hitachi EH-150 hydraulic excavator is a powerful, efficient, and technologically advanced machine. With its robust engine, precise hydraulic system, comfortable operator environment, and real-time monitoring capabilities, the EH-150 stands out as an exceptional choice for those in need of reliable and high-performance excavation solutions. Its durability and user-friendly features further make it a preferred option in the competitive construction and mining industries.