|
The brief introduction is mainly designed for the calibration and maintenance of thermal instruments and systems in industrial sites. The instruments provide comprehensive and practical functions, and are easy to operate. The instrument adopts a microcontroller as the CPU, integrating * * * new large-scale digital conversion integrated circuit and large screen LCD display technology. It has output, measurement, manual and 24VDC power distribution functions, and all four functions can work simultaneously, displaying output and measurement values as well as corresponding ITS-90 standard values (thermistor and thermocouple) on the same screen. Detailed Introduction of ZS-JYY-7 Thermal Code (Calibration Instrument) I. Features: ZS-JYY-7 Calibration Instrument is mainly designed for the calibration and maintenance of thermal instruments and systems in industrial sites. The instrument provides complete and practical functions and is easy to operate. The instrument adopts a microcontroller as the CPU, integrating * * * new large-scale digital conversion integrated circuit and large screen LCD display technology. It has output, measurement, manual and 24VDC power distribution functions, and all four functions can work simultaneously, displaying output and measurement values as well as corresponding ITS-90 standard values (thermistor and thermocouple) on the same screen. And equipped with a large capacity rechargeable battery, it is easy to carry and can easily complete the maintenance and calibration of thermal instruments (sensors, transmitters, display instruments, control systems) on industrial sites. It has the following usage characteristics: ■ compact, easy to carry and hold. ■ Sturdy and reliable, the support frame and hook holes on the back are suitable for on-site use. Large display screen, measurement and output can be displayed simultaneously. Measurement of voltage, current, frequency, and resistance, as well as output of voltage, current, and frequency. Measurement and output of 8 types of thermocouples (K, E, T, J, S, R, N, B), and measurement of 2 types of thermal resistors (PT100, Cu50). The measurement output of thermocouples and thermal resistors has ITS-90 international standard millivolts and corresponding display of resistance values. Voltage and current measurements can display percentages. Thermocouple measurement and output have automatic or manual compensation functions. The input of output values adopts multiple methods. The thermal engineering encyclopedia can achieve rapid mutual checking of resistance value and temperature value, millivolt value and temperature value. Equipped with a large capacity rechargeable battery, it can work continuously for 5-7 hours on a single charge (depending on the working condition). Large screen LCD with backlight display, Chinese menu operation. The button sound and backlight can be controlled, and the state set after the last * * * can be maintained every time the device is turned on. 2、 Technical Parameters 2.1 DC Signal Input: Measurement Function Range Accuracy DCV 0~35V ± 0.1% FS DCmV 0~100mV ± 0.05% FS DCmA 0~35mA ± 0.05% FS RTD 2 types ± 0.1% FS TC K, T, E, J, N ± 0.1% FS R, S, B ± 0.2% FS F 0.0~5000Hz ± 0.2Hz 2.2 DC Signal Output Function Range Accuracy DCV 0~5V ± 0.05% FS DCmV 0~100mV ± 0.05% FS DcmA 0~24mA ± 0.05% FS TC K, T, E, J, N ± 0.1% FS R, S, B ± 0.2% FS Hz 0~1000Hz ± 1Hz 0~5.00KHz ± 0.02KHz 2.3 Performance indicators: Operating temperature: -10~50 ℃ Storage temperature: -27~70 ℃ L × W1 (W2) × H Dimensions: mm3 237 × 131 (95) × 45 III. Operation mode 3.1 Surface version of the instrument ● LCD display screen: Display relevant information of measurement and output signals. Power switch: Press the power ON switch to turn on the power. Turn off the power. ● Keyboard: ⑴ Number area: directly input the quantity to be output or the value to be queried. ⑵: Set the cursor position value on the main screen and query screen, and select the parameter item to be modified when setting parameters. ⑶: Set the cursor position. ⑷ ENT: Enter key to confirm the validity of the selected item operation. ⑸ ESC: Enter the thermal engineering dictionary query on the main screen, and exit the parameter setting screen when setting parameters. ⑹ FUN: Switching between measurement or output types. During measurement, DCV, DCmA, DCmV, RTD, TC, and F are cyclically switched in sequence. The output is cyclically switched in the order of DCV, DCmA, DCmV, and TC. Range: Switching between the types and ranges of RTD and TC in measurement or output. RTD switches sequentially between Cu50 and Pt100, while TC switches sequentially between S, K, E, T, J, B, R, and N. Zero: Reset the output value to 0. (9) ON, OFF: power switch. Press ON for 2 seconds to turn on the power switch. The input and output terminals are divided into OUT area and IN area. The OUT area is used for signal output, and the IN area is used for signal measurement. The red terminal is positive, and the black terminal is negative. When the battery level is low (screen flashes or the power button cannot be turned on), plug the charger into this hole to charge. 3.3 Measurement and output operations: In this screen, all output and measurement signals provided by the instruments can be operated. Turn on the power and display Figure 1. At this point, the voltage and output voltage can be measured. The percentage of 1-5V corresponding to the current measurement or output value will be displayed in the additional information column. When the measurement or output value exceeds the range of 1-5V, the percentage will not be displayed. Press the Fun button in Measure to switch the measurement model. The model will cycle in the following order (DC voltage ->DC current ->DC millivolts ->thermistor ->thermocouple ->frequency ->DC voltage). The instrument will display (DCV ->DCmA ->DCmV ->RTD ->TC ->F ->DCV). Press the Fun button in Source to switch the output model. The model will cycle in the following order (DC voltage ->DC current ->DC millivolts ->thermocouple ->frequency ->DC voltage). The instrument will display (DCV ->DCmA ->DCmV ->TC ->F ->DCV). There are two ways to change the output value: ① Use the left and right arrow keys to select the position of the cursor in Figure 1, and use the up and down keys to modify the value of that position; ② Directly enter numerical values through the numeric keypad area. After entering one digit, the cursor will automatically move one digit to the right, the decimal point will automatically skip, and at the end, it will automatically jump to the starting digit (all numerical inputs below can be modified through these two methods). At this point, direct current can be measured and output, and the percentage of 4-20mA corresponding to the current measurement or output value can be displayed in the additional information column. When the measurement or output value exceeds the range of 4-20mA, the percentage will not be displayed. At this point, direct current can be measured and output without displaying any additional information in the additional information column. At this point, the thermal resistance can be measured, and the current measured temperature corresponding to the resistance value in the ITS-90 standard can be displayed in the additional information column. Switch the types of thermal resistors that can be measured according to the Range in Measure, in the following order (Cu50->Pt100->Cu50). At this point, the thermocouple can be measured and output, and the current measured temperature corresponding to the millivolt value in the ITS-90 standard, as well as the method and temperature of cold junction temperature compensation, can be displayed in the additional information column (Auto means using the internal temperature measurement value of the instrument as cold junction temperature compensation, Man means using a certain set value as cold junction temperature compensation, please refer to the parameter settings section for temperature setting). Switch the thermocouple types that can be measured according to the Range in Measure, in the following order (S ->K ->E ->T ->J ->B ->R ->N ->S). 3.3 Parameter setting operation allows for the viewing and modification of some parameters. Press the ENT key on the main screen to enter the parameter setting screen, and press the ESC key to exit the parameter setting screen and return to the main screen. The parameter setting screen is as follows: select the parameter to be modified by pressing the up and down keys. After selecting a parameter to be modified, press the ENT key to enter the parameter value modification, as follows: Then modify the parameter value in the same way as modifying the numerical value. Text parameters (such as automatic or manual) can only be modified by selecting specific values through the up and down keys. After entering the correct value, press the ENT key to save the input and return to the parameter selection screen. If you press the ESC key, do not save and return. After setting all parameters, press the ESC key to return to the main screen. 3.3.1 General parameter settings, parameter range, factory default values, input compensation, manual or automatic measurement of thermocouple, cold end temperature compensation method. Manually indicate the compensation temperature as the value set for the next parameter, and automatically indicate the ambient temperature measured by the instrument as the cold end compensation temperature of 00.0 ℃~99.9 ℃ 00.0. When manually using a thermocouple to measure the cold end compensation temperature. When the input compensation is set to manual, this parameter is used as the compensation temperature output for the cold end measured by the thermocouple. The compensation temperature for the cold end measured by the thermocouple in manual or automatic mode is 00.0 ℃~99.9 ℃ 00.0. When manually measuring the compensation temperature of the cold end with the same input compensation temperature, the contrast of the input compensation temperature is 0~4 02. The display screen contrast verification password is 0000~9999 0000. To modify the password, only after the verification password is correct, press the down key to enter the secondary parameters. 3.3.2 Secondary parameter settings (Non engineering personnel are not allowed to enter the secondary parameters. Otherwise, it will cause instrument measurement errors!) Enter the correct password in the verification password item of the general parameter settings, press Enter, and use the down arrow key to move down to the secondary parameter settings. Change password 0000~9999- Change verification password DCV zero point -9999~+9999 0000 DCV display value offset DCV ratio 0.000~9.999 1.000 DCV display value scaling DCmA zero point -9999~+9999 0000 DCmA display value offset DcmA ratio 0.000~9.999 1.000 DCmA display value scaling DCmV zero point -9999~+9999 0000 DCmV display value offset DCmV ratio 0.000~9.999 1.000 DCmV display value scaling RTD1 zero point -9999~+9999 0000 RTD1 display value offset (Cu50) RTD1 ratio 0.000~9.999 1.000 RTD1 display value scaling (Cu50) RTD2 zero point -9999~+9999 0000 RTD2 display value offset (Pt100) RTD2 Scale 0.000~9.999 1.000 RTD2 display value scaling (Pt100) TC-S zero point -9999~+9999 0000 display value offset (S-type thermocouple) TC-S scale 0.000~9.999 1.000 display value scaling (S-type thermocouple) TC-K Zero point -9999~+9999 0000 display value offset (K-type thermocouple) TC-K ratio 0.000~9.999 1.000 display value scaling (K-type thermocouple) TC-E zero point -9999~+9999 0000 display value offset (E-type thermocouple) TC-E ratio 0.000~9.999 1.000 display value scaling (E-type thermocouple) TC-T zero point -9999~+9999 0000 display value offset (T-type thermocouple) TC-T ratio 0.000~9.999 1.000 display value scaling (T-type thermocouple) TC-J zero point -9999~+9999 0000 display value offset (J-type thermocouple) TC-B zero point -9999~+9999 0000 display value offset (J-type thermocouple) (B-type thermocouple) TC-B ratio 0.000~9.999 1.000 display value scaling (B-type thermocouple) TC-R zero point -9999~+9999 0000 display value offset (R-type thermocouple) TC-R ratio 0.000~9.999 1.000 display value scaling (R TC-N Zero Point -9999~+9999 0000 Display Value Offset (N-type Thermocouple) TC-N Ratio 0.000~9.999 1.000 Display Value Scaling (N-type Thermocouple) 3.3 Thermal Code Operation This operation can be used to query the corresponding relationship between the millivolts or resistance values of thermocouples and thermal resistors and temperature. In the main screen, press the ESC key to enter the Thermal Code query screen. As follows: Use the up and down keys to select whether it is a thermal resistor or a thermocouple, use the left and right keys to select the model, and then press the ENT key to enter the query mode selection screen: choose whether to query the millivolt value or resistance value of the thermocouple through temperature, or to query the temperature value through the millivolt value or resistance value of the thermocouple. After confirming with ENT, enter the query screen: enter the temperature value, millivolt value, or resistance value, and you can see the value you want to query in the next column of * * *. Press the ESC key to exit the screen level by level and enter the main screen. 3.4 Charging: When the battery is fully charged (screen flashes or the power button cannot be turned on), insert the charger into this port for charging. During charging, measurement or output can be performed simultaneously. When charging, the green light flashes and the red light is on, indicating that it is fully charged. When the button sound and backlight control are on the main screen, pressing the decimal point key and the right arrow key at the same time can switch between the presence or absence of backlight. When on the main screen, press the decimal point key and left arrow key simultaneously to switch between the presence or absence of button sounds. Can maintain the last set state after shutdown. 4、 Attention: During testing and output, the terminal wiring must be consistent with the operation. For example, measuring voltage on the output terminal and measuring voltage on the current terminal may damage the instrument. Confirm the range of each gear and do not use it beyond the range. Do not use backlight on the instrument when there is sufficient light intensity, as this can prolong the battery life. When the instrument is brought from indoors to the site and automatic temperature compensation is used, if there is a large temperature difference, the instrument should be adapted to the site for 5 minutes to ensure that the temperature sensor inside the instrument is consistent with the ambient temperature, so as to accurately measure the ambient temperature value. When outputting thermocouple signals, the set temperature should be greater than or equal to the compensated temperature, so that the output millivolt signal is positive.
|
|
