12227 Simpson, 12227 Datasheet - Page 4

• Manufacturer Part Number: 12227
• Description: Analog Multimeters 270-5RT VOM HI A
• Manufacturer: Simpson

Specifications of 12227

• Accuracy: +/- 1.75 %
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1. INTRODUCTION ............................................................................... 7
2. INSTALLATION ................................................................................ 11
3. CONTROLS, JACKS AND INDICATORS ......................................... 12
4. OPERATION .................................................................................... 13
5. OPERATOR SERVICING ................................................................. 25
6. SERVICING INSTRUCTIONS .......................................................... 27
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10 Safety Considerations ........................................................................ 10
2.1
2.2
2.3
2.4
3.1
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10 AC Voltage Measurement 0-1000V Range .......................................18
4.11 Output Voltage Measurement .............................................................19
4.12 Decibel Measurement (-20 to +50 dB) .............................................. 20
4.13 Direct Current Measurement ..............................................................21
4.14 Direct Current Measurement 0-50 µA Range .................................... 21
4.15 Direct Current Measurement 0-1mA through 0-500mA Range ......... 21
4.16 Direct Current Measurement 0-10A Range .......................................22
4.17 Zero Ohms Adjustment .......................................................................23
4.18 Measuring Resistance .......................................................................23
4.19 Resistance Measurement of Semiconductors ................................... 24
5.1
5.2
5.3
5.4
5.5
6.1
6.2
6.3
General Description ............................................................................. 7
Overload Protection ............................................................................. 7
Internal Batteries .................................................................................. 8
Printed Circuit ....................................................................................... 8
Phenolic Case ...................................................................................... 8
Adjust-A-Vue Handle ............................................................................ 8
Test Leads ............................................................................................ 8
Technical Data ...................................................................................... 8
Definition of Accuracy ........................................................................ 10
Unpacking and Inspection ................................................................. 11
Warranty ............................................................................................. 11
Shipping ............................................................................................. 11
Power Source Requirements .............................................................11
Front Panel Description ......................................................................12
Safety Precautions .............................................................................13
Polarity Reversing ..............................................................................14
Measurement Of Unknown Voltage Or Current .................................15
Test Leads ..........................................................................................15
DC Voltage Measurement 0-250 Mv Range ...................................... 15
DC Voltage Measurement 0-1V Range ............................................. 15
DC Voltage Measurement 0-2.5 Through 0-500V Range. ................. 16
DC Voltage Measurement 0-1000v Range ........................................16
AC Voltage Measurement 0-2.5 Through 0-500V Range .................. 17
Inspection ........................................................................................... 25
Battery Replacement .......................................................................... 25
Fuse Replacement .............................................................................26
Test Lead Inspection .......................................................................... 26
Care ....................................................................................................26
Removing the Instrument Case ......................................................... 27
Replacement Parts .............................................................................27
Schematic Diagram ............................................................................ 29
Contents
4
6.3
Schematic Diagram
Figure 6-1. Schematic Diagram
29