User manual METEX MS-9160

[. . . ] These operating instructions are published by Conrad Electronic GmbH, KlausConrad-Str. Photocopy, microfilming or storage in electronic data processing equipment, without the express written consent of the publisher. Any use other than as described above may result in damage to the measuring instrument and can cause hazards such as, for example, short-circuits, fire, electric shock, etc. no part of the product should be modified or converted! [. . . ] A TTL level is an "asymmetric square wave". It is asymmetrical because, in contrast to the sine or "pure" square waves, the signal does not cross zero, i. - The TTL output can drive 20 "unit loads" when HIGH and 15 "unit loads" when LOW. Note that because of this adjustment of symmetry, the frequency can change and therefore should be readjusted. While doing this, observe the polarity of the load. Other outputs can either be grounded through the ground socket (= chassis) on the front panel (bottom right) or remain floating. Current limiting characteristics All 3 outputs are independently protected against overload and short circuit by means of a separate current limiting circuit. a) Output 0 to 30 V , 3 A: protected by means of current limiting. If the output current increases due to a load of more than 3 A, the output voltage is reduced (with a short circuit to approx. Should the load current exceed the value of 2. Should the load current exceed the value of 1. Protect the instrument from being dropped and from external mechanical damage by falling objects. do not short circuit the "+" and "-" terminals. Never go beneath the maximum permitted load of 2. 5 Ohm at the 5V/2A output and 15 Ohm at the 15V/1A output. Basic settings a) Before connecting the AC power cable, ensure that no load is present on the output terminals of the power supply. Auto Hold "A" in front of the small display 18. MIN = Minimum As soon as this symbol appears in the display, the lowest-measured value at any given time is displayed, for example during discharge of rechargeable cells. MAX = Maximum As soon as this symbol appears in the display, the highest-measured value at any given time is displayed, e. Set/Reset button The instrument is reset into its basic condition with this button. ) button This button switches the measurement from DC to AC values or, under resistance measurement, from actual resistance measurement to continuity test With this function, two different operating modes can be read simultaneously, e. = Battery symbol If this symbol appears in the display, the battery must be changed. [. . . ] In the "LOGIC" operating mode, it is not possible to use the subfunctions "MAX", "MIN" and Data Hold = "D-H". Before using the measurement range switch when leaving the logic function, -the SET/RESET button must be pressed, so that "rdY appears" in the- display. I) Using the multimeter in connection with a computer a) Connection Connect the RS-232 interface cable (null modem cable) to the multimeter (rear of the case under the lower cover) and to a serial interface of the computer. B) Using the software This multimeter operates with any computer with an RS-232 interface, but the software is only suitable for IBM-compatible computers. [. . . ]