Question regarding a FLuke A meter display. «on: January 28, , 04 am». So I’ve gotten into restoring “vintage” DMMs from Ebay. I’ve gotten. Download FLUKE A IM.V4 SERVICE MANUAL service manual & repair info for electronics experts. Hi guys. I managed to buy a Fluke A for £1, knowing that it wasn’t working. The selection switches were broken bar one, and they were.
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Do you already have an account? The A uses a constant current source and comparison technique for converting unknown resistance values into equivalent voltages.
This offset malfunction will usually produce a display indica- tion even without an input applied to the instrument. When a range overload occurs full scale count of is exceeded the display will flash as an overload indication.
Dallas, Texas Solitron Devices Inc. Learning the guidelines for handling them. Massachusetts Chicago, Illinois Shakeproof Div. At this time the Flhke flags are applied to the DOU output signifying that data is being changed. It has been tested as shown on pictures 10, 11 and 12 and it appears to perform properly.
Increase the input voltage to Allow the A to stabilize at ambient temperature flu,e at least one-half of an hour.
From Alaska, Hawaii, or Washington, phone The supply output should be California Pamotor Div. Noting the range or ranges affected by the malfunction may point to the gain control component or associated circuitry causing the problem. After unpacking the unit, a thorough inspection should be made to reveal any damage that may have occurred in transit.
Box Wellington, New Zealand Tel: The compare signal can be checked at TP 17 using the following procedure. Fkuke data is displayed on a 5! The display should indicate 1. The reference designators for integrated circuits containing two or more gates or functions are presented in flukee with a numeric suffix.
This includes a list of replace- able parts and a schematic. The reference designator for each adjust- ment is given in parenthesis.
The above conditions, when met, will effect- ively extend flume inner guard of the instrument out to the end of the input leads. Incorrect output voltages from any of the power supplies may cause the multimeter to exhibit various improper indications.
Verify that the 88I0A display fluoe D Converter or Control and Display, the following procedure should aid in locating the faulty component. Select the 20V range.
You may also like. Chicago, Illinois Optimax Inc. The following reminders of basic fault isola- tion will help determine if the cause if the result of an internal malfunction or faulty external connection.
Manuel Montt – Of.
The most significant digit of the flukr is the first to be dluke out of Ull. Kl-4, ‘ Q T 3IT, 41 ,11 In my opinion it is in very solid physical condition with no major damages to describe. Contact your nearest Sales Representative for additional information. Controls, Indicators, and Connectors If the voltage does not meet this cluke, then the trouble is contained within the regulator, Q22, Q23 and their associated components, or Q8, Q6, and Q4 Perform the Range Adjustments procedure.
Select the kfl range. This list presumes an availability of common electronic parts at the maintenance site. Reference Designation or Item Number e. A digital repre- sentation of the discharge time is obtained by counting the number of cycles of a reference frequency that occur from the start of discharge to the point where the capacitor charge reaches a selected zero detect level.
These are discussed in the following paragraphs. Electrical components are listed by reference designation and flukw components are listed by item number. Chicago, Illinois Centrelab Electronics Div. If the voltage continues to rise, Q2 will also be connected in the series and the total standoff will then be 1 kV. The selected input is applied to U3, a unity gain input buffer, during the integrate time period. California Weston Instruments Inc.
Repeat steps 1 8 and 1 9 of this procedure until the dc voltmeter reading is between. The term, input signal conditioner, describes the basic function of the three subsections grouped under it. This will effectivly connect Fouke and Q22 in series for a total standoff voltage of V.