Equipment information:

Philips PM 2505 Analog multimeter
Manufacturer:
Philips
Model: PM 2505
Date: 1980
Category: Measurement instruments
Group: Analog multimeter
Description: Electronic VAΩmeter
Information:
                                    The analog electronic multimeter PM 2505 is a universal
measuring instrument with 62 measuring ranges. With the
optional accessories the measuring ranges can be extended up
to 77.

The PM 2505 measures:

-	ac and dc voltages from 100mV f.s.d. to 1000V f.s.d.

-	resistances with a linear scale from 100£2 f.s.d. to 30M£2
f.s.d.

-	ac and dc currents from 1 jUA f.s.d. to 10A f.s.d..

The ranges in the voltage, resistance and current functions
are divided in 1-3-10 steps.

Separate ranges are available for testing semiconductors ^ 1
and for continuity check with the aid of an internal buzzer ^.

The instrument is powered by two 9V batteries which enable
continuous measuring for at least 1000 hours.

These manuals are available for the above equipment:

Philips -- PM 2505 -- Service Manual
File name: Philips-7945-Manual-Page-1-Picture
Manual Type: Service Manual
Pages: 48
Size: 2.02 Mbytes (2113641 Bytes)
Language: english
Revision:
Manual-ID/Number: 9499 475 01411
Date: 01 March 1980
Quality: Scanned document, reading partly badly, partly not readable.
Upload date:
MD5: 686ef68031af13e2a27c7a50316d4d8f
ed2kID: c10a55279935bf670205e45732753af7
Downloads: 42 since 19 June 2016
Information:
CONTENTS		Page
1. Introduction		5
2. Technical data		5
2.1. Measuring performance		5
2.1.1. D.c. voltage measurements		5
2.1.2. A.c. voltage measurements		6
2.1.3. D.c. current measurements		6
2.1.4. A.c. current measurements		7
2.1.5. Resistance measurements		8
2.1.6. Semiconductor testing i		8
2.1.7. Continuity check *1 {BUZZER mode)		9
2.1.8. dB measurements		9
2.2. General data-		9
2.2.1. Conversion characteristics		9
2.2.2. Display		9
2.2.3. Warm-up time		9
2.2.4. Operating conditions		10
2.2.5. Mechanical data		10
2.2.6. Power requirements		10
2.2.7. Input terminals arrangement		10
2.2.8. Calibration		11
2.2.9. Safety		11
3. Accessories		12
3.1. Accessories delivered with the PM2505		12
3.2. Optional accessories		12
3.2.1. HF probe PM9210 and accessory set PM9212		12
3.2.2. EHT probe PM9246		13
3.2.3. Current transformer PM9245		13
3 2 4. Shunt PM9244		13
3 2 5. RF probe PM9213		16
3.2.6. Carrying case PM9278		16
4. Circuit description		17
4.1. Introduction		17
4.2. Principle of operation		17
4.2.1. V— 1 V 'V' 1 + BATT and -	- BATT measurements	17
4.2.2. A 1 and A 'V measurements		17
4.2.3. i2 , i and BUZZER measurements		17
4.2.4. Amplifier		17
4.3. Detailed circuit description		19
4.3.1. V— 1 V 'N' , BATT and —	BATT attenuator	19
4.3.2. A zrzrz 11 and A shunts		20
4.3.3. Q, and BUZZER measurements		21
4.3.4. Amplifier and guard circuit		23
4.3.5. Protection		24
5. Acces		29
5.1. General		29
5.2. Dismantling the PM2505		29
5.3. Replacing parts		29
5.3.1. Slide switch ON/OFF or	1'''1	29
5.3.2. Range switch		29
5.3.3. Polarity indicator		30
6. Checking and adjusting		31
6.1. General -		31
6.2. Adjusting table		32
7. Parts list		34
7.1. Mechanical		34
7.2. Electrical		36
7.2.1. Capacitors		36
7.2.2. Resistors		37
7.2.3. Semiconductors		39
7.2.4. Integrated circuits		39
1.	Measuring leads with test pins PM9262	12
2	HF-probe PM9210	14
3.	Accessory set PM9212	14
4	HT probe PM9246	14
5.	Current transformer PM9246	14
6	Shunt PM9244	14
7.	RF-probe PM9213	16
8.	Blockdiagram	18
9.	V—, V 'V ,‘+BATT and — BATT attenuators	19
10.	A— , and A shunts	20
11	f2 1 ± 1 BUZZER measurements principle	21
12.	£2 $ , BUZZER current source	22
13	Feed back circuitry	23
14.	Amplifier and buffer circuit	26
15	Protection	24
16	Full scale deflection values	28
17.	Measuring system	30
18	Replacing the polarity indicator	30
19.	Adjusting elements	31
20.	p.c. board component side	40
21.	p.c. board conductor side	41
22.	Function switch lay-out component side	42
23.	Function switch lay-out conductor side	42
24.	List of used components	45
25.	Circuit diagram	45
Philips-7945-Manual-Page-1-Picture
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