Instruction/ maintenance manual of the product Digital Wattmeter DWM-4 Macsense Connectivity
Go to page of 12
- 1 - Welcome : Thank you for your purchase of the DWM-4 Digital Wattmeter. The DWM-4 represents an advancement in technology that has never before been available in RF power measurement.
- 2 - in the assembly instructions to assist the builder. These can be used for parts identification and PC board placement. Assembly: You will first install (locate, place, and solder in place) the parts on the DWM-4 Main PC board. Use the silk screen layout in the back of this manual to assist in locating where parts are to be installed.
- 3 - ___ Install the socket for U1. Note the orientation of the socket. The flattened corner goes in the upper left, toward the 14-pin DIP socket for U3. Do not install U1 (the 68HC11) until later. ___ Install the 8 MHz crystal. ___ Install the electrolytic capacitor, C2, 10uf radial.
- 4 - ___ Install the LCD Module in the chassis. Use the 4 black flat head screws, the two #4 nylon washers and four nuts. Use the washers on the Status/SWR side of the chassis. Do not over tighten the mounting screws. ___ Install the SPST toggle switch (SW1) in the chassis in the Power On position.
- 5 - You are now ready to mount the DWM PC board in the chassis. ___ Install the DWM-4 PC board in the chassis using four screws, nylon spacers, washers and nuts. Do not drill out the holes in the PC board ___ Install U1 (the 68HC11) by carefully pressing it into place in its socket.
- 6 - ___ Install the .01uf monolithic capacitors, C1 and C2. ___ Install 1/8" ste reo jack. ___ Unwrap the enclosure. Install the SO-239 connectors. Put one #4 screw in hole and place two nuts on the screw. Repeat with the other three screws. Do not tighten them at this time.
- 7 - HF/QRP Remote Sensor Assembly Instructions ___ Wind T1 with 10 turns using the red and gr een #28 gauge wire. T1 is the small, black toroid just under one half inch in diameter. See picture below and wind this in bifiliar fashion by using two lengths of wire and winding them at the same time.
- 8 - ___ Install C4, 3.5-13 pf trimmer capacitor. Note that C4 has two pins that are common (connected). They should line up with the two holes in the PC board that are connected together with a trace on the bottom. ___ Install T1. It lies flat against the PC board and the #18 wire will pass through the center (you will install this later).
- 9 - Installation: The DWM-4 operates from an 11 to 15 volt DC power source. The current requirement is about 75 mA. Be sure to use a power supply or power adapter that meets these requirements. The coaxial DC jack on the back of the display unit will accept a plug with an OD of 5.
- 10 - menu offers information about each of the four sensor inputs. Some items are common across different menus. There are two basic wattmeter modes: setup and operate.
- 11 - At a minimum, a 100 W HF radio and good 50ohm dummy load can be used to calibrate the HF sensor and display unit. Even if you know how much power your radio emits, consider using an additional wattmeter of known accuracy to assist you during the calibration process.
- 12 - was installed correctly. Make sure U3 is installed correctly. Check D1 for polarity. Check the SIP resistor (RP1) for proper orientation. No Display: Make sure the 14-pin ribbon cable is installed and oriented properly. Be sure the nylon washers are in place on the two nuts closest to the outside.
An important point after buying a device Macsense Connectivity Digital Wattmeter DWM-4 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Macsense Connectivity Digital Wattmeter DWM-4 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Macsense Connectivity Digital Wattmeter DWM-4 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Macsense Connectivity Digital Wattmeter DWM-4 you will learn all the available features of the product, as well as information on its operation. The information that you get Macsense Connectivity Digital Wattmeter DWM-4 will certainly help you make a decision on the purchase.
If you already are a holder of Macsense Connectivity Digital Wattmeter DWM-4, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Macsense Connectivity Digital Wattmeter DWM-4.
However, one of the most important roles played by the user manual is to help in solving problems with Macsense Connectivity Digital Wattmeter DWM-4. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Macsense Connectivity Digital Wattmeter DWM-4 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
