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. In the event of damages which arise due to non-compliance with the user manual, any claim under guarantee will be void. [. . . ] F) OFFSET adjustment - The DC voltage level of the output signal can be adjusted with the OFFSET control knob in the range of +/- 10 V. Turning to the right means positive voltage, turning to the left means negative voltage. - If the control knob is pressed , the output voltage will have no DC voltage component. G) Symmetry adjustment - The symmetry of the output voltage can be changed in the range of 1:3 and 3:1. - To change the symmetry of the waveforms, pull the SYM control knob and turn it slowly to the left (ccw) or to the right (cw). H) SWEEP adjustment (Wobbler) - To operate the built-in frequency sweep, pull the SWEEP WIDTH control knob and use it to adjust the width of the sweep signals in the range 100 : 1. - To achieve maximum width, turn the frequency adjustment knob (with scale) to its left stop and the width control to its right stop. - To adjust the speed of the sweep signal, turn the SWEEP RATE control knob slowly to the left or right. 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. 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. 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. Protect the instrument from being dropped and from external mechanical damage by falling objects. Basic settings a) Before connecting the AC power cable, ensure that no load is present on the output terminals of the power supply. 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. Using the multimeter A) Fitting the battery - changing the battery So that the measuring instrument functions perfectly, it must be fitted with a 9V battery. [. . . ] Now connect the other end of the black test lead to the digital circuit"ground" = "-" (normally). While the black test lead remains connected to ground, the red test probe can be removed from the positive supply. The test points under consideration can now be touched with the red test probe; as a result the multimeter will display three possibilities. - If the level is more than 70 % of the stored supply voltage, "Hi" will be displayed; - If the level is less than 30 % of the stored supply{1215} voltage, "Lo" will be displayed; - If the level on the contrary is between = 31 % and 69 % of the stored supply voltage (e. [. . . ]