1. Introduktion
The Extech 412355A is a precision instrument designed for calibrating process devices and accurately measuring DC process signals. It functions as both a current and voltage calibrator and meter, capable of sourcing and measuring signals from 0 to 24mA or as mV in voltage ranges. Its robust design, featuring an oyster case with a flip-up display, makes it suitable for both handheld and benchtop applications.
Figur 1: The Extech 412355A Calibrator/Meter. This image shows the device in its open, operational state, displaying the LCD screen and control buttons for power, mode, unit selection, memory, and zero adjustment. A white cable is connected to the side port.
2. Sikkerhedsoplysninger
Please read all safety instructions before operating the Extech 412355A. Failure to follow these instructions may result in electric shock, fire, or personal injury.
- Do not operate the device if it appears damaged or if the case is open.
- Ensure correct connections are made before applying power or signals.
- Brug altid enheden inden for den angivne volumentage og nuværende grænser.
- Refer to the specifications section for detailed operating ranges.
- Udskift batterierne med det samme, når indikatoren for lavt batteri vises, for at sikre nøjagtige aflæsninger.
3. Pakkens indhold
Kontroller, at alle genstande er til stede og i god stand ved udpakning.
- Extech 412355A Strøm og Voltage Calibrator/Meter
- 9V batteri (forinstalleret eller medfølger separat)
- Calibration cable with spade lug terminals
- Bæretaske
- Halsrem
- AC strømadapter
4. Produktfunktioner
- Precision source for calibrating process devices and measuring DC process signals.
- Oyster case with flip-up display for versatile handheld or benchtop use.
- Large 3-1/2 digit LCD display for clear readings.
- Intuitive touch keypad for easy operation.
- Displays readings in mA, as a percentage of the 0 to 24mA range, or as mV in voltage rækker.
- Provides adjustable 0 to 24mA and 0 to 10V calibration source.
- Five stored calibration values for quick recall and efficient calibrations.
5. Opsætning
- Batteri installation:
The device requires a 9V battery. If not pre-installed, open the battery compartment on the rear of the unit, connect the 9V battery to the terminal, and place it inside. Close the compartment securely.
- AC Power Adapter Connection:
For extended use or when batteries are low, connect the supplied AC power adapter to the DC input jack on the side of the calibrator and plug it into a standard AC outlet.
- Tilslutning af testledninger:
Attach the calibration cable with spade lug terminals to the appropriate input/output jacks on the calibrator based on whether you are sourcing or measuring current/voltage. Ensure connections are firm and correct for the intended measurement or calibration task.
6. Betjeningsvejledning
6.1 Tænd/sluk
- Tryk på MAGT knappen for at tænde eller slukke for enheden.
- The LCD will illuminate and display the last used mode.
6.2 Mode Selection (Source/Measure)
- Tryk på MODE button to switch between SOURCE and MEASURE functions.
- In SOURCE mode, the calibrator outputs a signal.
- In MEASURE mode, the calibrator measures an external signal.
6.3 Unit Selection (mA, %, mV)
- Tryk på ENHED button to cycle through the available display units: mA, percentage (of 0-24mA range), or mV (for voltage ranges).
6.4 Adjusting Output/Reading Values
- Brug UP (▲) og NED (▼) arrow buttons to adjust the output value in SOURCE mode or to fine-tune settings.
6.5 Memory Functions (MEM/ZERO)
- Tryk på MEM/ZERO button to access stored calibration values (M1-M5) or to perform a zero adjustment. Refer to the full manual for detailed memory programming instructions.
7. Vedligeholdelse
7.1 Rengøring
Tør enheden af med annonceamp cloth and mild detergent as needed. Do not use abrasive cleaners or solvents. Ensure the device is powered off and disconnected from any power source before cleaning.
7.2 Udskiftning af batteri
When the low battery indicator appears on the display, replace the 9V battery immediately to maintain measurement accuracy. Follow the battery installation steps outlined in the Setup section. Dispose of used batteries according to local regulations.
7.3 Opbevaring
Store the calibrator in its carrying case in a cool, dry environment when not in use for extended periods. Remove the battery if storing for several months to prevent leakage.
8. Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Enheden tænder ikke. | Low or dead battery; AC adapter not connected or faulty. | Replace 9V battery or connect AC power adapter. Ensure AC adapter is functional. |
| Upræcise aflæsninger. | Incorrect mode/unit selection; poor test lead connection; device needs calibration. | Verify MODE and UNIT settings. Check test lead connections. If issues persist, consider professional calibration. |
| No output in SOURCE mode. | Incorrect connections; output value set to zero; internal fault. | Check output connections. Adjust output value using arrow buttons. If problem continues, contact support. |
| Displayet viser "OL" eller "OVERBELASTNING". | Input signal exceeds device's measurement range. | Disconnect the signal immediately. Ensure the input signal is within the specified range of the calibrator. |
9. Specifikationer
| Model | 412355A |
| Funktioner | Current Source/Measure, Voltage Source/Measure |
| Nuværende rækkevidde | 0 til 24 mA |
| VoltagRækkevidde | 0 til 10V |
| Målenøjagtighed | ±0.5 % |
| Vise | 3-1/2 ciffer LCD |
| Strømkilde | 9V Battery (Alkaline), AC Power Adapter |
| Batteritype | Alkalisk |
| Dimensioner (L x B x H) | 4.2 x 1.8 x 3.8 tommer (10.7 x 4.6 x 9.7 cm) |
| Vægt | 0.35 kilo (12.3 ounce) |
| Driftstemperatur | Refer to full product datasheet for details. |
10. Garanti og support
10.1 Garantioplysninger
The Extech 412355A Current and Voltage Calibrator/Meter is covered by a 1 års begrænset garanti from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from misuse, unauthorized modification, accident, or neglect. Please retain your proof of purchase for warranty claims.
10.2 Teknisk support
For technical assistance, troubleshooting, or warranty service, please contact Extech customer support. Visit the official Extech webwebsted for kontaktoplysninger og yderligere ressourcer.
