Philips pm2521 User manual

Automatic Multimeter
PM2521
Operating Manual/Gebrauchsanleitung/Notice d’Emploi
<**•
9499 470 17901
830630 / 02 /,.
PHILIPS Industrial &
Electro-acoustic Systems
PHILIPS

Automatic Multimeter
PM2521
Operating Manual/Gebrauchsanleitung/Notice d’Emploi
9499 470 17901
830630 / 02 /. .
ST 3523
PHILIPS

2
IMPORTANT
In correspondence concerning this instrument, please quote the type number and serial number as given on
the type plate.
NOTE: The design of this instrument is subject to continuous development and improvement.
Consequently, this instrument may incorporate minor changes in detail from the information
Acontained in this manual.
ft
s SAFETY INSTRUCTIONS. This equipment had been built and tested according to safety specifications for
electronic measuring equipment laid down by DIN 57411 part 1/2.80, VDE 0411 Part 1/2.80, I EC 348-11,
and has left the factory in perfect condition from a safety point of view. In order to maintain this condition
and to ensure the safe operation, the user must follow the instructions and warning notices contained in the
directions for use. Prior to use after storage and transport, the equipment should first be examined for any
mechanical faults. If there is any doubt that the safety measures are no longer adequate, their effectiveness
should be checked. If its safety can no longer be quaranteed, the equipment should be taken out of service
and safeguarded against further use. Before opening, the equipment should be disconnected from all electrical
sources. Service and repair work should only be carried out by experienced qualified personnel and by
following the standard safety procedure. This equipment belongs to safety class 110. Only the approved
fuses must be used. Tlhe use of repaired fuses and the shorting of the fuse holder is not permitted.
WICHTIG
Bei Schriftwechsel fiber dieses Gerat wird gebeten, die genaue Typenbezeichnung und die Geratenummer
anzugeben. Diese befinden sich auf dem Leistungsschild.
BEMERKUNG: Die Konstruktion und Schaitung dieses Gerats wird standig weiterentwickelt und verbessert.
Deswegen kann dieses Gerat von deh in dieser Anleitung stehenden Angaben abweichen.
SICHERHEITSHINWEISE. Dieses Gerat ist gemass DIN 57411 Teil 1/2.80, VDE 0411 Teil 1/2.80, IEC 348-11,
Schutzmassnahmen fur elektronische Messgerate, gebaut und geprijft und hat das Werk insicherheitstechnisch
einwandfreiem Zustand verlassen. Um diesem Zustand zu erhalten und einen gefahrlosen Betrieb sicher zu
stellen; muss der Anwender die Hinweise und Warnmerke beachten, die in dieser Gebrauchsanleitung enthalten
sind. Vor der Inbetriebnahme nach Lagerung und Transport ist darauf zu achten, dass das Gerat keine me-
chanischen Schaden aufweist. Besteht der Verdacht, dass die Schutzmassnahmen nicht mehr ausreichend
wirksam sind, ist deren Wirksamkeit zu prufen. Ist der Schutz nicht mehr sichergestellt, so ist das Gerat ausser
Betrieb zu nehmen und gegen Inbetriebnahme zu sichern. Das Gerat ist vor dem Offnen von alien Spannungs-
quellen zu trennen. Wartungs- und Uberholungsarbeiten diirfen nur unter Beachtung der gebotenen Vorsichts-
massnahmen durch eingearbeitete Fachleute ausgefiihrt werden. Dieses Gerat ist ein Gerat der Schutzklasse 11,0.
Es diirfen nur die vorgeschriebenen Sicherungen verwendet werden. Die Verwendung reparierter Sicherungen
und das Kurzschliessen des Sicherungshalters sind nicht zulassig.
IMPORTANT
RECHANGE DES PIECES DETACHEES (Reparation)
Dans votre correspondance et dans vos reclamations se rapportant a cet appareil, vetyllez TOUJOURS
indiquer le numero de type et le numero de serie qui sont marques sur la plaquette de caracteristiques.'
REM A ROUES: Cet appareil est Tobjet de developpemen ts et ameliorations continuels. En consequence, certains
details mineurs peuvent differer des informations donnees dans la presente notice d'emploi et
d'entretien.
REGLES DE SECURITE. Cet appareil a ete construit et teste suivant les normes DIN 57411, premiere partie /2.80,
VDE 0411, premiere partie /2.80, IEC 348-11 mesures de protection pour appareils electroniques de mesure, et il a
quitte I'usine dans un etat impeccable du point de vue de la technique de securite. Pour maintenir cet etat et
s'assurer d'un functionnement sans danger, I'utilisateur doit prender en consideration les instructions et les
avertissements qui sont contenus dans le present mode d'emploi. Avant sa mise en service a la suite de
I'entreposage et du transport, il convient de veiller a ce que 1‘appareil ne presente aucun endommagement
mecanique. Si I'on soupponne que les mesures de protection ne sont plus suffisamment efficaces, il y a lieu
de verifier leur efficacite. Au cas ou la protection n'est plus assuree, I'appareil doit etre mis hors service et
des dispositions doivent etre prises pour garantir qu'il ne sera pas utilise. Avant d'etre ouvert, I'appareil doit
etre isole de toute source de tension. Les travaux d'entretien et de remise en etat ne doivent etre executes
qu'en respectant les mesures de precaution proposees par un personnel competent. Cet appareil est un appareil
de la classe de protection II, 0 . Seuls, les fusibles presents peuvent etre utilises. L'utilisation de fusibles
repares et le courtcircuitage du porte-fusibles sont interdits.
©
N.V. PHILIPS' GLOEILAMPENFABRIEKEN - EINDHOVEN - THE NETHERLANDS - 1982
PRINTED IN THE NETHEFV^pS

3
CONTENTS Page
1. INTRODUCTION 13
2. TECHNICtfLDATA 14
2.1. Measuring performance. 14
2.1.1. Direct voltage measurements.14
2.1.2. Alternating voltage measurements.15
2.1.3. Direct current measurements .16
2.1.4. Alternating current measurements. 17
2.1.5. dB measurements. 18
2.1.6. Resistance measurements.19
2.1.7. Diode measurements.20
2.1.8. Temperature measurements .20
2.1.9. Frequency measurements.21
2.1.10. Time measurements .22
2.1.11. Trigger level.23
2.2. General data . 2 4
2.2.1. Conversion characteristics (ADC).24
2.2.2. Visual representation of the display.24
2.2.3. Operation conditions.^.24
2.2.3.1. Climatic conditions.24
2.2.3.2. Mechanical conditions.24
2.2.4. Mains supply conditions.25
2.2.4.1. Mains supply voltage.25
2.2.4.2. Mains supply frequency.25
2.2.4.3. Power consumption . 2 5
2.2.5. Input terminals arrangement.25
2.2.6. Time function (ADC) .25
2.2.7. Calibration .25
2.2.8. Mechanical .25
2.2.9. Safety .25
3. Accessories 26
3.1. Accessories supplied with the PM2521 .’..26
3.2. Optional available accessories.26
3.2.1. Summary .26
3.2.2. Specifications of the optional accessories .26
3.2.2.1. High Tension (HT) probe PM9246 . 26
3.2.2.2. Shunt PM9244 and Current transformer PM9245 . 26
3.2.2.3. Data Hold probe PM9263 .‘.. . 27
3.2.2.4. Pt-100 temperature probe PM9249 . 27
3.2.2.5. High frequency probe PM9210 and accessory set PM9212 .28
3.2.2.6. Dimensions of 19 inch rackmounting set.28

4
Page
4. PRINCIPLE OF OPERATION 29
4.1. Analog section.29
4.1.1. Measuring voltages, currents, resistances and diodes.29
4.1.2. Measuring time and frequency.29
4.1.3. Measuring temperatures.29
4.1.4. ** dB measurements.29
4.1.5. Measurements in relative reference mode.29
1 4.1.6. Control of the analog section .29
4.1.7. ADC .29
4.2. Control section .30
4.3. Display section.30
5. INSTALLATION 31
*
5.1. Mains-supply.31
5.1.1. Safety instructions.31
5.1.2. Replacing the mains fuse .31
5.1.3. Adaption to the mains voltage.31
5.1.4. Adaption to the mains frequency ....-• .31
6. OPERATION ' 32
6.1. Switching-on.32
6.2. Controls.32
6.2.1. Front panel.32
6.2.2. Rear panel.34
6.3. Zero setting. * . 3 4
6.4. Measuring.35
6.4.1. Standard measurements.35
6.4.1.1. Direct voltage measurements (V— ) .35
6.4.1.2. Alternating voltage measurements (V~ rms) .36
6.4.1.3. Decibel measurements (dB) .37
6.4.1.4. Direct current measurements (A.-r-O.38
t 6.4.1.5. Alternating current measurements (A ~ rms) .39
6.4.1.6. Resistance measurements (£7 ).40
6.4.1.7. Diode measurements ( )..41
6.4.1.8. Temperature measurements (°C).42
6.4.1.9. Frequency measurements (Hz) .43
6.4.1.10. Time measurements (s) .45
6.4.1.11 .Peak voltage measurements.48
6.4.2. Extended capabilities (optional) .50
6.4.2.1. High tension measurements .50
6.4.2.2. High current measurements (Arrr and A ~ rms) .".51
6.4.2.3. Data Hold measurements.52
6.4.2.4. High frequency measurements.53

Page
LIST OF FIGURES
Fig. 1. Accessories supplied with the PM2521 . 126
Fig. 2. HT probe PM9246 . 126
Fig. 3. Shunt PM9244 . . . !. 126
Fig. 4. Current transformer PM9245 . 126
Fig. 5. Data Hold probe PM9263 . 126
Fig. 6. Pt-10(ftemperature probe PM9249 . 126
Fig. 7. HF probe PM9210 . 130
Fig. 8. Accessory set PM9212. 130
Fig. 9. Dimensions for 19 inch rackmounting set. 130
Fig. 10. Basic built-up of PM2521 . 134
Fig. 11. Block diagram of PM2521 . 134
Fig. 12. Removing the top cover. 138
Fig. 13. Adapting the mains transformer . 138
Fig. 14. dB measurements. 37
Fig. 15. Temperature pcobe connection. 42
Fig. 16. Trigger level selection in function Hz. 44
Fig, 17. Normal mode trigger level selection in function s . 45
Fig. 18. Special mode trigger level selection in function s. 45
Fig. 19. Data hold connection . 47
Fig. 20. Trigger level selection in peak voltage measurerrjent mode . 49
Fig. 21. Peak voltage measurements. 49
Fig. 22. Front panel. 142
Fig. 23. Rear panel. 142
Fig. 24. Measuring set-up for HT probe PM9246 . 146
Fig. 25. Measuring set-up for shunt PM9244 . 146
Fig. 26. Measuring set-up for current transformer PM9245 . 150
Fig. 27. Measuring set-up for data hold probe PM9263 . 150
Fig. 28. Measuring set-up for high frequency probe PM9210 . 150

6
INHALT
Seite
1. EINLEITUNG 55
2. TECHIMISCHEJ5ATEN 56
«
: 2.1. Messleistung .56
2.1.1. Gleichspannungsmessungen .56
2.1.2. Wechselspannungsmessungen .57
2.1.3. Gleichstrommessungen .58
2.1.4. Wechselstrommessungen .59
2.1.5. dB Messungen .60
2.1.6. Widerstandsmessungen..61
2.1.7. Diodenmessungen.62
2.1.8. Temperaturmessungen.62
2.1.9. Frequenzmessungen .63
2.1.10. Zeitmessungen.64
2.1.11. Triggerpegel.65
2.2. Allgemeine Daten.66
2.2.1. Analog-Digital Umsetzung (ADC) . 6 6
2.2.2. Sichtanzeige .66
2.2.3. Betriebsbedingungen.66
2.2.3.1. Klimatische Bedingungen.!.66
2.2.3.2. Mechanische Bedingungen .66
2.2.4. Betriebsbedingung Speisung nach IEC359 . 67
2.2.4.1. Netzspannung .67
2.2.4.2. Netzfrequenz.67
2.2.4.3. Leistungsaufnahme.67
2.2.5. Anordnung der Eingangsklemmen.>.67
2.2.6. Zeitfunktion (ADC) .67
2.2.7. Kalibrierung .67
2.2.8. Mechanische Daten.67
2.2.9. Schutz.67
3. ZUBEHOREN 68
t
3.1. Zubehoren im Lieferumfang des PM2521 enthalten.68
3.2. Wahlweise erhaltliches Zubehor.'.68
3.2.1. Zusammenfassung.68
3.2.2. Spezifikationes des Wahlzubehors.68
3.2.2.1. Hochspannungs-Messkopf PM9246. 68
3.2.2.2. Shunt PM9244 und Stromwandler PM9245 . 68
3.2.2.3. Messkopf PM9263 mit "Data-hold".69
3.2.2.4. Pt-100 Temperaturmeszfuhler PM9249 .-. 69
3.2.2.5. HF-Tastkopf PM9210 und Zubehorsatz PM9212 .70
3.2.2.6. Abmessungen fur 19 inch Gestelleinbau .70
V

7
Seite
4. FUNKTIONSPRINZIP 71
4.1. Analogteil.71
4.1.1. Messung von Spannung, Strom, Widerstand und Dioden.71
4.1.2. Messung von Zeit und Frequenz .71
4.1.3. Messung von Temperaturen .71
^1.4. dB-Messungen .71
4.1.5. Messung in relativer Referenz Betriebsart .71
4.1.6. Steuerung des Analogteils.71
4.1.7. Analog-Digital Umsetzer (ADC).71
4.2. Steuerteil .72
4.3. Anzeigeteil .72
5. INBETRIEBNAHME 73
5.1. Netzspannung.73
5.1.1. Sicherheitsvorkehrungen .73
5.1.2. Ersetzen der Netzsicherung.73
5.1.3. Anpassung an die Netzspannung.73
5.1.4. Anpassung an die Netzfrequenz .'.73
6. BETRIEB ' 74
6.1. Einschalten.74
6.2. Bedienungselemente.74
6.2.1. Frontplatte.74
6.2.2. Ruckwand.76
6.3. Nullsetzen.76
6.4. Messen.77
6.4.1. Standardmessungen.77
6.4.1.1. Gleichspannungsmessungen (V—. ) .77
6.4.1.2. Wechselspannungsmessungen (V~ rms) .78
6.4.1.3. dB-Messungen (dB).79
6.4.1.4. Gleichstrommessungen (A— ).80
* 6.4.1,5. Wechselstrommessungen (A~ rms) .81
6.4.1.6. Widerstandsmessungen. 8 2
6.4.1.7. Diodenmessungen ( -»- ).'.83
6.4.1.8. Temperaturmessungen (°C) .84
6.4.1.9. Frequenzmessungen (Hz).85
6.4.1.10. Z eitmessungen (s).87
6.4.1.11.Spitzenspannungsmessungen.90
6.4.2. Erweiterte Moglichkeiten (wahlweise).92
6.4.2.1. Messung von Hochspannungen .92
6.4.2.2. Messung hoher Strome (A — und A~ rms).93
6.4.2.3. Messungen mit "Data hold".94
6.4.2.4. Hochfrequenzmessungen.95

8
BILDVERZEICHNIS Seite
Abb. 1. Mit dem PM2521 gelieferte Zubehoren. 126
Abb. 2. Hochspannungs Messkopf PM9246 . 126
Abb. 3. Shunt PM9244 . 126
Abb. 4. Stromwandler PM9245 . 126
Abb. 5. MeszkopfPM9263 mit "Data Hold". 126
Abb. 6. Pt-100 Temperaturfiihler PM9249 . 126
Abb. 7. HF Tastkopf PM9210. 130
Abb. 8. Zubehorsatz PM9212 . 130
Abb. 9. Abmessung fur 19 inch Gestelleinbau. 130
Abb. 10. Grundaufbau des PM2521 . 134
Abb. 11. Blockschaltbild des PM2521 . 134
Abb. 12. Abnehmen der Abdeckel. 138
Abb. 13. Anpassen des Netztransformators . 138
Abb. 14. dB-Messungen . *. 79
Abb. 15. Temperaturfuhler.Anschluss. 84
Abb. 16. Triggerpegelwahl in Funktion Hz. 86
Abb. 17. Normale Betriebsart fur Triggerpegelwahl in Funktion s. 87
Abb. 18. Spezielle Betriebsart fur Triggerpegelwahl in Funktion s. 87
Abb. 19. Data Hold Anschluss., •. 89
Abb. 20. Triggerpegelwahl bei Messung von Spitzenspannungen. 91
Abb. 21. Messung von Spitzenspannungen. 91
Abb. 22. Frontplatte.-. 142
Abb. 23. Ruckwand.142
Abb. 24. Messanordnung fur Hochspannungsmesskopf PM9246 . 146
Abb. 25. Messanordnung fur Shunt PM9244 . 146
Abb. 26. Messanordnung fur Stromwandler PM9245 . 150
Abb. 27. Messanordnung fur Messkopf PM9263 mit "Data Hold". 150
Abb. 28. Messanordnung fur Hochfrequenz Tastkopf PM9210. 150
t

9
TABLE DES MATIERES Page
1. INTRODUCTION 97
2. CARACTERJSTIQUES TECHNIQUES 98
%
2.1. Caracteristiques de mesure. 98
2.1.1. Mesures de tension continue. 98
2.1.2. Mesures de tension alternative. 99
2.1.3. Mesures de courant continue.100
2.1.4. Mesures de courant alternat'd. 101
2.1.5. Mesures dB . 102
2.1.6. Mesures de resistance. 103
2.1.7. Mesure de diode.104
2.1.8. lyiesures de temperature. 104
2.1.9. ft/lesures de frequence.105
2.1.10. Mesures de temps. 106
2.1.11. Niveau de declenchement. 107
2.2. Donnees generales. 108
2.2.1. Caracteristiques de conversion (OAD). 108
2.2.2. Representation visuelle de I'affichage. 108
2.2.3. Conditions de fonctionnement conforme a la norme CEI359 . 108
2.2.3.1. Conditions climatiques . . . . :. 108
2.2.3.2. Conditions mecaniques . 108
2.2.4. Conditions d'alimentation secteur. 109
2.2.4.1. Tension secteur .109
2.2.4.2. Frequence secteur.109
2.2.4.3. Consommation. 109
2.2.5. Disposition des bornes d'entree.». 109
2.2.6. Fonction de temps (CAD) . 109
2.2.7. Etalonnage . 109
2.2.8. Caracteristiques mecanique.109
2.2.9. Securite.109
3. ACCESSOIRES 110
4
3.1. Accessoires fournis avec le PM2521 . 110
3.2. Accessoires en option .•. 110
3.2.1. Sommaire. 110
3.2.2. Specifications des accessoires en option . 110
3.2.2.1. Sonde HT PM9246 . 110
3.2.2.2. Shunt PM9244 et transformateur de courant PM9245 . 110
3.2.2.3. Sonde de maintien des donnees PM9263 . Ill
3.2.2.4. Sonde de temperature Pt-100 PM9249 . Ill
3.2.2.5. Sonde de haute frequence PM9210 et jeu d'accessoires PM9212 . 112
3.2.2.6. Dimensions de montage en rack 19 inch. 112

10
Page
4. PRINCIPE DE FONCTIONNEMENT 113
4.1. Section analogique.113
4.1.1. Mesure de tensions, courants, resistances et diodes. 113
4.1.2. Mesure de temps et de frequence.113
4.1.3. Mesure de temperatures. 113
4.1.4. ^ MesuresdB . 113
4.1.5. Mesures en mode de reference relative . 113
4.1.6. Commande de section analogique .113
4.1.7. Convertisseur analogique-digital (CAD).113
4.2. Section commande. 114
4.3. Section affichage .114
5. INSTALLATION 115
5.1.
Alimentation secteur. . . . 115
5.1.1.
Instruction de securite. . . . 115
5.1.2. Remplacement du fusible secteur. ... 115
5.1.3.
Adaption a la tension secteur. . . . 115
5.1.4.
Adaptation a la frequence secteur . .'.
... 115
OPERATION
■ '
116
6.1.
Mise en service.
. . . 116
6.2. Commandes.
... 116
6.2.1.
Panneau avant .
... 116
6.2.2.
Panneau arriere .
... 118
6.3.
Reglage du zero.
... 118
6.4.
Mesure.
... 119
6.4.1. Mesures standard .
. . . 119
6.4.1.1.
Mesures de tension continue (V— ).
. . . 119
6.4.1.2.
Mesures de tension alternative (V~ eff) ...
... 120
6.4.1.3.
MesuresdB.
... 121
6.4.1.4.
Mesures de courant continue (A— ) .
... 122
* 6.4.1.5. Mesures de courant alternatif (A~ eff) . . . .
... 123
6.4.1.6.
Mesures de resistance ( £2 ).
... 124
6.4.1.7. Mesures de diode ( ->f-) .
\
... 125
6.4.1.8. Mesures de temperature (°C) .
... 128
6.4.1.9. Mesures de frequence (Hz).
... 129
6.4.1.10.Mesures de temps (s).
... 133
6.4.1.11
.Mesures de tension de Crete .
... 140
6.4.2. Possibility accrues (en option).
... 144
6.4.2.1.
Mesures de tension haute avec sonde HT PM9246 .
. , t .
... 144
6.4.2.2. Mesures de courant fort (A — et A~ eff) .
... 145
6.4.2.3.
Mesures avec maintien des donnees .
... 148
6A2.4.
Mesures de haute frequence.
... 149
• * V

11
LISTE DES FIGURES Page
Fig. 1. Accessoires fournis avec le PM2521 . 126
Fig. 2. Sonde HT PM9246 . 126
Fig. 3. Shunt PM9244 . 126
Fig. 4. Transforfnateur de courant PM9245 . 126
Fig. 5. Sondfe de maintien des donnees PM9263 . 126
• Fig. 6. Sonde Pt-100 PM9249 . 126
Fig. 7. Sonde HF PM9210. 130
Fig. 8. Jeu d'accessoires PM9212.130
Fig. 9. Dimensions de montage en rack 19 inch.130
Fig. 10. Structure de base PM2521 . 134
Fig. 11. Schema synoptique PM2521 . 134
Fig. 12. Depose du couvercle superieur .138
Fig. 13. Adaption du transformateur secteur.138
Fig. 14. IVlesuresdB . <t. 121
Fig. 15. Connection de la sonde temperature. 128
Fig. 16. Selection du niveau de declenchement en fonction Hz.132
Fig. 17. Selection du niveau de declenchement en mode normal, fonction s . 133
Fig. 18. Selection du niveau de declenchement en mode special, fonction s. 133
Fig. 19. Connection de maintien des donnees..137
Fig. 20. Selection du niveau de declenchement en mode de mesure de tension de Crete.141
Fig. 21. Mesures de tension de crSte . 141
Fig. 22. Panneau avant.. 142
Fig. 23. Panneau arriere .142
Fig. 24. Disposition de mesure pour sonde HT PM9246 . 146
Fig. 25. Disposition de mesure pour shunt PM9244 . 146
Fig. 26. Disposition de mesure pour transformateur de courant PM9245 . 150
Fig. 27. Disposition de mesure pour sonde de maintien des donnees PM9263 . 150
Fig. 28. Disposition de mesure pour sonde de haute frequence PM£210.150

13
INTRODUCTION
The PM 2521 is a microcomputer controlled digital multimeter. The type of microcomputer used is a 8035
with a 4k external ROM. Thanks to the microcomputer extra measuring functions are incorporated, in
addition to the standard multimeter measuring functions. These extra measuring functions make it possible
to measure the standard multimeter measuring signals in other units.
)*
The standard multimeter functions of the PM 2521 are:
Alternating voltage (V ~ rms) Direct current (A-^r- )
Direct voltage (V —) Diodes ( ->p )
Alternating current (A ~ rms) Resistance (Q.)
The extra measuring functions of the PM 2521 are:
Temperature Pt-100 (°C) Trigger level (+/—)
Frequency {Hz} Decibels (dB)
Time (s) ^ Relative reference (zero set)
A combination of the trigger level function and the time or frequency function, make selective measurements
possible.
The trigger level function itself also enables peak voltage measurements.
The relative reference function offers the possibility to select a predetermined relative reference point.
Each subsequent reading will indicate the positive and negative deviation of the relative reference level.
Each measuring function is subdivided into a number of ranges. For range switching a selection can be made
between manual or automatic range selection.
To get an optimum reading in the ac ranges an ac coupled rms convertor is built in the PM 2521.
The periodical self calibration of the PM 2521 ensures high accuracy over a long working period.
The PM 2521 is equipped with a 5 digit display. As display a liquid crystal display is used. It gives a very
clear reading, especially under strong light conditions.
Ordering number for the instruction sticker is 9499 470 16401
ST 3523

14
2. TECHNICAL DATA
This apparatus has been designed and tested in accordance with IEC publication 348, Safety Requirements
for Electronic Measuring Apparatus, and has been supplied in a safe condition. The present instruction manual
contains some information and warnings which have to be followed by the user to ensure safe operation and
to retain the apparatus in a safe condition.
All values mentioned in this description are nominal; those given with tolerances are binding and guaranteed by
the manufacturer.
Manufacturer
Type number
Designation
Measuring quantities
NV Philips MIG S& I
PM 2521
Digital multimeter
V —, V ~, A —, A~, U -N-, s, Hz, °C, V peak
2.1. MEASURING PERFORMANCE
2.1.1. Di rect voltage measu rements
Ranges
Maximum input voltage in range 2000 V
Resolution
Number of representation units
Accuracy
Temperature coefficient
Input impedance
Offset current at input
Series Mode Rejection Ratio (SMRR)
Maximum Series Mode signal
Common Mode Rejection Ratio
(CMRR)
Maximum Common Mode voltage
Response time
Zero setting
Zero point drift
mV
200
V
2 -20-200 2000 V
1000 V
10 pV in range 200 mV
21000
± (0,03 % of reading + 0,01 % of range)
± 0,01 % of reading /°C
Range
Input impedance
200 mV
2 V
20 MJ2//60 pF
20 V 11 MJ7//85 pF
200 V
2000 V
10 MJ2//95 pF
<20 pA
86 d.B for ac signals at 50 Hz ± 1 %
60 dB for ac signals at 60 Hz ±^j %
2x range end value with exception of range 2000 V
(1000 V)
100 dB for dc signals
100 dB for ac signals of 50 Hz or 60 Hz ± 1 %
400 V, 560 V peak
0,7 s without ranging
1,5 s including ranging
Automatic zero setting of the ADC
Manual with zero potentiometer at the front of the
PM 2521
5 /iV/°C between 0 °C and 35 °C
20 pV/°C between 35 °C and 45 °C
With pushbutton ZERO SET at the front of the PM 2521
Relative reference setting

15
Maximum input voltages
In all ranges:
Between Hi and
Between Hi and
Between Lo and
Lo 1000 V rms
earth 1000 V rms
earth 400 V rms
Maximum VHz product 10^
2.1.2. Alternating voltage measurements
Ranges
Maximum input voltage in range 2000 V
Resolution
Number of representation units
Accuracy
(valid between 3 % and 100 % of range)
Temperature coefficient
Input impedance
Common Mode Rejection Ration
(CMRR)
AC detector
Crest factor
Response time
Maximum input voltage
mV
200
V
2 20 200 2000
600 V
10 pN in range 200 mV
Measured value less than 0,5 % of range is displayed as zero
21000
Range 200 mV up to and including 200 V
40 Hz-500 Hz
at 20kHz
at 100kHz
± (0,3% of reading + 0,15% of range)
± (1 %of reading + 0,15% of range)
± (5 %of reading+ 1 %of range)
ST 3354
Range 2000 V |
40 Hz- 60 Hz
± (0,3% of reading + 0,15% of range)
± (0,03 % of reading /°C + 0,01 % of range /°C)
Range
Input impedance
200 mV
2 V
20 Mfi//60 pF
20 V 11 M£2//85 pF
200 V
2000 V
10 Mfi//95 pF
100 dB for dc signals
80 dB for ac signals 50 Hz or 60 Hz ± 1 %
RMS convertor, ac coupled
2 at range end
1,5 s without ranging
3 s including ranging
In all ranges:
Between Hi and Lo 600 V rms
Between Hi and earth 1000 V rms
Between Lo and earth 400 V rms
Maximum dc voltage 400 V
Maximum VHz product 10^

Direct current measurements
Ranges
2 20 200
mA
2 20 200
A
2 20
Maximum input current in range 20 A
10 A
Resolution
1 nA in range 2 /iA
Number of representation units 2100
Accuracy
Temperature coefficient
Voltage drop over shunt
Response time
Protection
± (0,2 % of reading + 0,05 % of range)
± (0,02 % of reading /°C + 0,005 % of range /°C)
Range Voltage drop
2 /iA
20 /iA
200 /iA
2 mA
<2,5 mV
20 mA
200 mA
<25 mV
2 A
,•20 A
<250 mV
0,7 s without ranging
1,5 s including ranging
Range 2 /iA - 20 mA; 250 V rms
Range 200 mA - 20 A are not protected
Imax. = 20 A for 20 seconds
Maximum Common Mode voltage
Maximum input voltages
400 V rms, 560 V peak
In all ranges:
Between (Hi and Lo 250 V rms
Between Hi and earth 400 V rms
Between Lo and earth 400 V rms

17
2.1.4. Alternating current measurements
Ranges
A A
2 20 200
mA
2 20 200
A
2 20
Maximum jnput current in range 20 A
Resoluffon
Number of representation units
Accu racy
(valid between 3 % and 100 % of range)
Temperature coefficient
Voltage drop over shunt
AC detector
Crest factor
Response time
Protection
Maximum Common Mode voltage
Maximum input voltage
4
10 A
1 nA in range 2 /tA
Measured value less than 0,5 % of range is displayed as zero
2100
40 Hz - 200 Hz ± (0,4% of reading +0,15% of range)
± (0,03 % of reading /°C + 0,01 of range /°C)
Range Voltage drop
Frequency
2 ju A
20 ju A
200 a A
2 mA
<2,5 mV
50 Hz
20 mA
200 mA
<25 mV
2 A
20 A
<250 mV
RMS convertor, ac coupled
2 at range end
1 s without ranging
3 s including ranging
Range , 2 a A - 20 mA; 250 V rms
Range 200 mA - 20 A are not protected
Imax . = 20A for 20 seconds
400 V rms, 560 V peak
In all ranges:
Between Hi and Lo 250 V rms
Between Hi and earth 400 V rms
Between Lo and earth 400 V rms

dB measurements (valid in function V~ rms)
Range
0 dB reference
Resolution
P
A*-
Number of representation units
Accuracy
Temperature coefficient
Input impedance
Common Mode Rejection Ratio
(CMRR)
AC detector
Crest factor
Response time
Relative reference setting
Maximum input voltages
-57,7 dB . . . +57,7 dB
1 mW in 600 £1 , 0 ,775 V or when selecting the relative
reference function with pushbutton ZERO SET at the
front of the PM 2521
0,1 dB
Measured value less than —57,7 dB is displayed as —99,9 dB
999
Signals
Frequency Accuracy
-31,7 dB ... +47 dB
40 Hz- 20kHz
20kHz - 100kHz
± 0,2 dB
± 1 dB
-50 dB ... -31,7 dB
40 Hz- 20kHz
+ 2 dB
—57,7 dB ... —50 dB
40 Hz- 20kHz
+ 3 dB
>+47 dB
40 Hz-500 Hz
+ 1,5 dB
0,02 dB /°C
Signals Impedance
.0 V- 1,8 V 20 Mf2//60 pF
1,8V- 18 V
11 ML2//85 pF
18 V - 600 V
10 ML2//95 pF
100 dB for dc signals
80 dB ac signals 50 Hz or 60 Hz ± 1 %
RMS convertor, ac coupled
2 at range end
3s *
With pushbutton ZERO SET at the front of the PM 2521
In all ranges:
Between Hi and Lo
Between Hi and earth
Between Lo and earth
Maximum dc voltage
Maximum VHz product
600 V rms
1000 V rms
400 V rms
400 V
10 7

19
2 . 1 . 6 .
*
Resistance measurements
Ranges
Resolutian
Number of representation units
Q 200
2 20
200
2 20
10 m£2 in range 200 £1
21000
Accu racy
Temperature coefficient
Measuring current
Maximum voltage
at the terminals with open input
Relative reference selection
Polarity of the input terminals
Response times
Protection
Maximum input voltages
Range
Accuracy
200 n
2 kft
' 20 kft
200 kft
± (0,2 % or reading +0,1 % of range)
G
G
CM
O
CM
± (1 % or reading +0,1 % or range)
Range
Temperature coefficient
200 n
2 kft
20 kfi
200 kft
+ (0,02 of reading /°C + 0,01 % of range /°C )
2 Mf2
20 Mfi
± (0,05 % of reading /°C + 0,01 % of range / °C )
Range
Measuring current
200 n
2 kS2
20 kn
200
2 ML2
20 Mfi
1 mA
1 mA
100 /i A
lOp A
1 p A
100 n A
4 V
With pushbutton ZERO SET at the front of the PM 2521
— on Hi + on Lo
Range
Response time
200 - 200 kft
0,7 s without ranging
2,5 s including ranging
G
G
CM
O
CM
2 s without ranging
7 s without ranging
265 V rms
In all ranges:
Between Hi and Lo 265 V rms
Between Hi and earth 400 V rms
Between Lo and earth 400 V rms