10,11,12
®
Multimeters
Service
PN 900824
March 1992 Rev.1, 7/93
© 1992-1993 Fluke Corporation, All rights reserved. Printed in USA
All product names are trademarks of thei r r espective c omp ani es.
WARRANTY
Fluke warrants to the original product purchaser that each product it manufactures will
be free from defects in material and workmanship under normal use and service. The
warranty period is controlled by the warranty document furnished with each product and
begins on the date of shipment. Fluke’s warranty does not apply to fuses, batteries,
CRTs or any product which, in Fluke’s opinion, has been misused, altered, neglected, or
damaged by accident or abnormal conditions of operation or handling.
To obtain warranty service in the USA, call 1-888-99-FLUKE (1-888-993-5853). Outside
the USA, contact your nearest Fluke sales or service representative. Fluke assumes no
risk for damage in transit. Fluke will, at its option, repair or replace the defective product
free of charge or refund the purchase price. However, if Fluke determines that the failure
was caused by misuse, alteration, accident, or abnormal condition of operation or
handling, you will be billed for the repair and the repaired product will be returned to you
transportation prepaid.
THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
OR USE. FLUKE WILL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES OR LOSS OF DATA, WHETHER IN CONTRACT,
TORT, OR OTHER WISE.
Some states do not allow the exclusion or limitation of incidental or consequential
damages, or implied warranty periods, so the above limitations may not apply to you.
Other rights may vary from state to state.
Fluke Corporation Fluke Europe B.V
P.O. Box 9090 P.O. Box 1186
Everett, WA 98206-9090 5602 BD Eindhoven
U.S.A. The Netherlands
MULTIMETER SAFETY
The Fluke 10, 11, 12 Multimeters have been designed and tested according to IEC
Publication 348, Safety Requirements for Electronic Measuring Apparatus. This manual
contains information and warnings which must be followed to ensure safe operation and
retain the meter in safe condition. Use of this equipment in a manner not specified herein
may impair the protection provided by the equipment.
These mutimeters comply with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) these multimeters may not cause harmful interference, and
(2) these multimeters must accept any interference received, including interference that
may cause undesired operation.
Some common international electrical symbols used in this manual are shown below.
B
F
D
I
AC - ALTERNATING
CURRENT
DC - DIRECT
CURRENT
EITHER AC OR DC
CURRENT
FUSE
DANGEROUS
Y
VOLTAGE
EARTH GROUND
J
SEE EXPLANATION
W
IN MANUAL
DOUBLE INSULATION
T
FOR PROTECTION
AGAINST ELECTRIC
SHOCK
Before using the meter, read the following safety information carefully. In this manual,
"WARNING," is reserved for conditions and actions that pose hazard(s) to the user;
"CAUTION," is reserved for conditions and actions that may damage your meter.
• Avoid working alone
• Follow all safety procedures for equipment being tested.
• Inspect the test leads for damaged insulation or exposed metal. Check test lead
continuity. Damaged leads should be replaced.
• Be sure the meter is in good operating condition.
• Select the proper function for your measurement.
• To avoid electrical shock, use caution when working above 60V dc or 30V ac RMS.
• Disconnect the live test lead before disconnecting the common test lead.
• Disconnect the power and discharge high-voltage capacitors before testing in Ω and
LR.
• When making a current measurement, turn the circuit power off before connecting
the meter in the circui t.
• Check meter fuses before measuring transformer secondary or motor winding
current. An open fuse may allow high voltage build-up, which is potentially
hazardous.
• Use clamp-on probes when measuring circuits exceeding 10 amps.
• When servicing the meter, use only the replacement parts specified.
• Do not allow meter to be used if it is damaged or if its safety is impaired.
Table of Contents
Chapter Title Page
1 Introduction and Specifications........................................................ 1-1
1-1. Introduction........................................................................................... 1-1
1-2. Specifications........................................................................................ 1-1
2 Theory of Operation........................................................................... 2-1
2-1. Introduction........................................................................................... 2-3
2-2. Theory of Operation.............................................................................. 2-3
2-3. Analog Measurement IC (U1).......................................................... 2-3
2-4. Microcomputer IC (U2).................................................................... 2-3
2-5. VCHEK Input Resistance................................................................. 2-3
3 Maintenance........................................................................................ 3-1
3-1. Introduction........................................................................................... 3-3
3-2. Disassembly and Reassembly............................................................... 3-3
3-3. Cleaning................................................................................................ 3-7
3-4. Performance Tests................................................................................. 3-7
3-5. Calibration ............................................................................................ 3-8
4 Replaceable Parts and Schematics................................................... 4-1
4-1. Introduction........................................................................................... 4-3
4-2. How To Obtain Parts ............................................................................ 4-3
4-3. Schematics............................................................................................ 4-3
4-4. Warranty and Service Centers .............................................................. 4-4
i
List of Tables
Table Title Page
1-1. Specifications......................................................................................................... 1-2
2-1. Electrical Components on Main PCA.................................................................... 2-4
2-2. U1 Pinout Table ..................................................................................................... 2-5
3-1. Required Equipment............................................................................................... 3-7
3-2. Performance Tests for Fluke 10............................................................................. 3-9
3-3. Performance Tests for Fluke 11 and 12.................................................................. 3-10
4-1. Final Assembly....................................................................................................... 4-5
4-2. A1 Main PCA......................................................................................................... 4-7
iii
List of Figures
Figure Title Page
2-1. Typical VCHEK Input Resistance with DC Volts Function Selected ................... 2-7
3-1. Disassembled Unit.................................................................................................. 3-4
3-2. Removing and Reinserting the Printed Circuit Assembly...................................... 3-5
3-3. Calibration Adjustment.......................................................................................... 3-10
4-1. Final Assembly Drawing........................................................................................ 4-6
4-2. A1 Main PCA Components.................................................................................... 4-9
4-3. Fluke 10 Schematic................................................................................................ 4-10
4-4. Fluke 11 Schematic................................................................................................ 4-12
4-5. Fluke 12 Schematic................................................................................................ 4-14
v
Chapter 1
Introduction and Specifications
Title Page
1-1. Introduction........................................................................................... 1-3
1-2. Specifications........................................................................................ 1-3
1-1
1-1. Introduction
SERVICE PROCEDURES DESCRIBED HEREIN SHOULD BE
PERFORMED BY QUALIFIED PERSONNEL ONLY. TO AVOID
ELECTRIC SHOCK, PERFORM ONLY THOSE SERVICE
PROCEDURES IN THIS INSTRUCTION SHEET.
The 10 Series Service Manual provides the information necessary to service the Fluke
Model 10, Model 11, and Model 12 Multimeters. The following information is provided
in this publication:
• Specifications (Section 1)
• Basic theory of operation (Section 2)
• Disassembly and reassembly (Section 3)
• Performance tests (Section 3)
• Calibration (Section 3)
• Illustrated parts lists and schema tic diagr am (Se ct ion 4)
• Refer to the Users Manual for operating instructions.
WARNING
Introduction and Specifications
Introduction
1
1-2. Specifications
Specifications are in Table 1-1. Accuracy is specified for a period of one year after
calibration, at 18°C to 28°C (64°F to 82°F) with relative humid ity to 90 %. AC
conversions are ac-coupled, average respond ing, and calib ra ted to the rms value of a sine
wave input.
Accuracy specifications are given as:
±([% of reading] + number of least significant digits])
1-3
10, 11, 12 Multimeters
Service Manual
Table 1-1. Specifications
Maximum Voltage
Between any Terminal
and Earth Ground
Display 3 3/4-digits, 4000 counts, updates 4/sec
Operating Temperature -10°C to 50°C
Storage Temperature -30°C to 60°C indefinitly (to -40°C for 100 hrs)
Temperature Coefficient 0.1 x (specified accuracy)/°C (<18°C or >28°C)
Relative Humidity 0% to 90% (-10°C to 35°C) 0% to 70% (35°C to 50°C)
Battery Type 9V, NEDA 1604 or IEC 6F22
Battery Life 650 continious hours with alkaline 450 continious hours with carbon-zinc
Shock, Vibration 1 meter shock. Per MIL-T-28800D for a Class 3 Instrument
Size (HxWxL) 1.35 in x 2.75 in x 5.55 in (3.46 cm x 7.05 cm x 14.23 cm)
Weight 10 oz (286 g)
Safety Designed to Protection Class II requirement of UL1244, ANSI/ISA-S82,
EMI Regulations Complies with FCC Part 15, Class B, and VDE 0871B.
Volts AC 4000 mV* 1 mV ±(2.9%+3) ±(1.9%+3)
4.000V 0.001V ±(2.9%+3) ±(1.9%+3)
40.00V 0.01V ±(2.9%+3) ±(1.9%+3)
400.0V 0.1V ±(2.9%+3) ±(1.9%+3)
600V 1V ±(2.9%+3) ±(1.9%+3)
Volts DC 4000 mV 1 mV ±(1.5%+2) ±(0.9%+2)
4.000V 0.001V ±(1.5%+2) ±(0.9%+2)
40.00V 0.01V ±(1.5%+1) ±(0.9%+1)
400.0V 0.1V ±(1.5%+1) ±(0.9%+1)
600V 1V ±(1.5%+1) ±(0.9%+1)
Resistance 400.0Ω 0.1Ω ±(1.5%+2) ±(0.9%+2)
4.000 kΩ 0.001 kΩ ±(1.5%+1) ±(0.9%+1)
40.00 kΩ 0.01 kΩ ±(1.5%+1) ±(0.9%+1)
400.0 kΩ 0.1 kΩ ±(1.5%+1) ±(0.9%+1)
4.000 MΩ 0.001 MΩ ±(1.5%+1) ±(0.9%+1)
40.00 MΩ 0.01 MΩ ±(1.9%+3) ±(1.5%+3)
Capacitance 1.000 µF 0.001 µFNA ±(1.9%+2)
10.00 µF 0.01 µFNA ±(1.9%+2)
100.0 µF0.1 µFNA ±(1.9%+2)
1000 µF1 µFNA±(1.9%+2)
10000 µF 10 µF NA ±(10%+90) Typical
Continuity/Diode
Test
* The 4000 mV range can only be entered in the manual range mode. Use the 4000 mV range with
accessories.
** The beeper is guaranteed to come on at <25Ω and turn off at >250Ω. The meter detects opens or shorts
of 250 µs or longer.
2.000V 0.001V ±(1.5%+2) ±(0.9%+2)
600V ms
CSA C22.2 No 231, and VDE 0411, and IEC 1010 overvoltage category
III.
Accuracy (50 to 400 Hz)Function Range Resolution
Model 10 Models 11/12
1-4
Table 1-1. Specifications (cont)
Introduction and Specifications
Specifications
1
Function Overload
Protection*
Volts DC 600V rms >10 MΩ <100 pF
Volts AC 600V rms >5 MΩ <100 pF kCHEK
Resistance Open Circuit
600V rms <1.5V dc
Diode 600V rms 2, 4-3. 0V dc 2,400V dc 0.95 mA typical
* 3 x 106 V Hz Maximum
** Models 11 and 12 only
MIN MAX Recording with Elapsed Time (Model 12 Only)
Specified accuracy of the measurement function ± 12 digits for changes >200 ms in duration (±40 digits in
ac). Typical 100 ms response to 80%.
Elapsed Time Resolution Accuracy
Input Impedance
(Nominal)
k
CHEK & LoZ = >2 kΩ
<200 pF**
& LoZ = >2 kΩ <200
pF** (ac-coupled)
Test Voltage
Common Mode
Rejection Ratio
(1 kΩ Unbalance)
>100 dB at dc, 50 Hz,
or 60 Hz
>60 db, dc to 60 Hz
Full Scale Voltage To
4.0 MΩ 40 MΩ
<450 mV 1.5V dc <500 uA
dc
Normal Mode
Rejection
>50 dB at 50 Hz
or 60 Hz
Short Circuit
Current
0 to 100 hours 1 minute 0.3% typical
(99:59)
Continuity Capture (Model 12 Only)
Detects opens or shorts of 250 µs or longer.
1-5
Chapter 2
Theory of Operation
Title Page
2-1. Introduction........................................................................................... 2-3
2-2. Theory of Operation ............................................................................. 2-3
2-3. Analog Measurement IC (U1).......................................................... 2-3
2-4. Microcomputer IC (U2).................................................................... 2-3
2-5. VCHEK Input Resistance................................................................. 2-3
2-1
10, 11, 12 Multimeters
Service Manual
2-2
2-1. Introduction
Section 2 provides a basic theory of operation for the Series 10 Multimeters. Electrical
components on the printed circuit assembly (A1 Main PCA) are listed in Table 2-1.
Refer to Figure 4-2 for the location of these components and Figures 4-3 through 4-5 for
the schematic diagrams.
2-2. Theory of Operation
The analog/digital IC (U1) implements the electrical measurement functions. See Table
2-2 for pin names and descriptions. The microcomputer (U2) controls U1, the LCD (U3),
and the user interface. Discrete components support U1 and U2, provide reference
standards for measurements, and provide input overload protection.
2-3. Analog Measurement IC (U1)
U1 implements the following analog functions: a/d converter, ac to dc converter,
VCHEK circuitry (Models 11 and 12 only), active filter, passive filter, power supply,
range configuration circuitry, signal routing circuitry, beeper driver, digital control
circuitry, and digital U2 interface circuitry.
Theory of Operation
Introduction
2
The a/d converter is a patented dual-rate, dual-slope converter. The dual-rate conversion
allows for MIN MAX (Model 12 only) and fast autoranging functions. The ac to dc
converter is full-wave rectified and average-responding. The active and passive filters
are two-pole and one-pole low-pass filters (respectively) that are used for signal filtering
prior to a/d conversion. The internal power supply generates a ground voltage nominally
+3V relative to VSS. Range configuration circuitry connects the Z1 resistor network as
needed for different ranges. Routing circuitry connects the various signal conditioning
circuits as needed. The a/d converter and a counter are controlled by a state machine.
Finally, digital circuitry interfaces with U2 via a parallel address and bidirectional data
bus.
Voltage is measured using a ratio comparison of the unknown voltage to the reference
voltage (REFI pin). Resistance is calculated using a ratio comparison of the voltage
across the unknown resistor to the voltage across a precision reference resistor, with the
same current in both. Capacitance is measured by determining the amount of charge
added for a given dc voltage change.
2-4. Microcomputer IC (U2)
U2 writes range settings and a/d converter information to U1. U2 reads a/d converter
results and status information. This includes the low battery check, slide-switch position,
continuity check, and VCHEK data. The microcomputer performs math operations on
the raw data from U1 and configures it for the LCD. U2 also reads pushbutton inputs.
Finally, the 2.1 MHz clock signal at U2 is divided down to 131 kHz and sent to U1
(CLK pin) for the counter.
2-5. VCHEK Input Resistance
As shown in Figure 2-1, the input resistance for the VCHEK function is non-linear. The
data in the graph are for the volts dc function (any range) and are the steady state values
obtained after the PTC thermister (RT1) has stabilized. The data also apply for the volts
ac function.
2-3
10, 11, 12 Multimeters
Service Manual
Analog Measurement IC U1
Microcomputer IC U2
Input Divider and Ohms Reference Resistor Network Z1
Input Divider AC Coupling Capacitor C14
J2 Input Receptable Voltage Sense Resistor R17
J1 Input Receptable Voltage Sense Resistor R14
Reference Voltage for Volts Measurements VR1, R4, R5, R6, R26
A/D Converter Integrate Capacitor C2
A/D Converter Autozero Capacitor C1
A/D Converter Gain Resistors R1, R3, R15
Active Filter Components R7, R8, C5, C6
Table 2-1. Electrical Components on Main PCA
Circuit and Function Component Designator(s)
Passive Filter Components R9, C7
AC to DC Converter Gain Resistors R11, R12, R13
AC to DC Converter AC Coupling Capacitor C8
Bias Current Setting Resistor R2
DGND-VSS Voltage Setting Resistors R10, R24
Power Supply Bypass Capacitors C3, C15
Reverse Battery Protection CR1
System Clock Y1
VCHEK Input Current Limiters R16, R18, R29
VCHEK input Positive Temp. Coef. Thermistor RT1
VCHEK Input Voltage Clamp Circuit Q1, Q2, CR2, R28
VCHEK Input Fusible Resistor R19
Microcomputer Reset Circuit R23, R25, C10, C13, CR3
On/Off and VCHEK Select Slide Switch S1
Beeper LS1
Beeper Current Limiter R22
2-4
Slide Switch Protection E1
Switch Sense Bypass Capacitor C9
Input Divider Bypass Capacitor C16
Zero Ohm Jumpers R20, R21, R27
Table 2-2. U1 Pinout Table
Theory of Operation
VCHEK Input Resistance
2
Pin
No.
1 READ(L) When low (VSS), data from addressed register can be read.
2 ADR5 Most significant address bus line.
3 ADR4 Bit 4 of parallel address bus.
4 ADR3 Bit 3 of parallel address bus.
5 ADR2 Bit 2 of parallel address bus.
6 ADR1 Bit 1 of parallel address bus.
7 ADR0 Least significant address bus line.
8 VSS Negative power supply voltage (-3V relative to DGND).
9 VDD Positive power supply voltage for analog only (Vbat-3V=VDD-DGND).
10 K0 1st a/d gain resistor pin, generally for de-integrate.
11 K1 2nd a/d gain resistor pin, generally for intergrate.
12 K2 3rd a/d gain resistor pin, for autozero.
13 AZ A/D converter pin for autozero capacitor.
14 INT A/D converter pin for integrator capacitor.
Pin Name Description
15 REFI 1.00V reference voltage for de-integrate signal in volts.
16 BIAS Pin for analog bias current generator reference resistor.
17 REFH Connects 1.235V reference voltage to on-chip circuits.
18 BGND Not used.
19 AFO Active filter high output pin (2-pole, low-pass filter).
20 FAO Internal active filter node.
21 FAI Internal active filter node.
22 AFI Active filter high input pin.
23 VSS Negative power supply voltage (-3V reletive to DGND).
24 PFO Passive filter low output pin (1-pole, low-pass filter).
25 AVAOM Absolute value amp (full wave rectified) negative output pin.
26 AVAOP Absolute value amp (full wave rectified) positive output pin.
27 AVAM Absolute value amp inverting input (summing node).
28 ACBO AC buffer output.
29 VSET Voltage divider sense for power supply.
30 PSTEST Pin to disable on-chip power supply for U1 testing.
31 DGND Ground power supply pin connected to common (digital ground).
32 AGND Common input sense line. No current flow (Analog ground).
33 CLAMP Op amp output voltage for Q2 clamp transister base drive.
2-5
10, 11, 12 Multimeters
Service Manual
Table 2-2. U1 Pinout Table (cont)
Pin
No.
34 AMPS Shunt resistor sense pin. Unused in Fluke series 10.
35 ISRC Current source pin for continuity, ohms, and capacitance.
36 SWS Slide-switch position sense pin. Internal pull down.
37 OHMS Ohms sense resistor input pin. Sense voltage at J2.
38 VSS Negative power supply voltage (-3V relative to DGND).
39 ACV AC volts input pin from 10 MΩ resistor.
40 APV0 DC volts input pin from 10 MΩ resistor.
41 DIVLO Input divider (Z1) common (low) pin.
42 APV1 10-to-1 voltage divider and 1 MΩ reference resistor input.
43 APV2 100-to-1 voltage divider and 100 kΩ reference resistor input.
44 APV3 1000-to-1 voltage divider and 10 kΩ reference resistor input.
45 APV4 10,000-to-1 voltage divider and 1 kΩ reference resistor input.
46 DGND Ground power supply pin connected to common (digital ground).
47 DATA3 Most significant bidirectional data bus line.
Pin Name Description
48 DATA2 Bit 2 of parallel data bus.
49 DATA1 Bit 1 of parallel data bus.
50 DATA0 Least significant bidirectional data bus line.
51 N/C No connection.
52 BEEPER(L) One of two beeper drive lines. Voltage swings VDD to VSS.
53 VSS Negative power supply line (-3V relative to DGNG).
54 VSS Negative power supply line (-3V relative to DGNG)
55 CLK System clock line from U2. 131,072 Hz.
56 BCLK Beeper frequency (2.3 kHz) clock line from U2.
57 TESTCLK Test clock pin for U1 testing.
58 BEEPER One of two beeper drive lines. Voltage swings VDD to VSS.
59 N/C No connection.
60 WRITE(L) When driven low (VSS), data is written to addressed register.
2-6
500
100
50
10
5
NEGATIVE DCV INPUT
SMALL SIGNAL INPUT RESISTANCE (kΩ)
1
POSITIVE DCV INPUT
Theory of Operation
VCHEK Input Resistance
2
0.1 0.5 1.0 5.0 10.0 5.0 500.0
|Vin| (Vdc)
Figure 2-1. Typical VCHEK Input Resistance with DC Volts Function Selectedcance
ana01f.eps
2-7
Chapter 3
Maintenance
Title Page
3-1. Introduction........................................................................................... 3-3
3-2. Disassembly and Reassembly............................................................... 3-3
3-3. Cleaning................................................................................................ 3-6
3-4. Performance Tests ................................................................................ 3-6
3-5. Calibration ............................................................................................ 3-7
3-1
10, 11, 12 Multimeters
Service Manual
3-2
3-1. Introduction
Section 3 covers the following:
• Disassembly and reassembly
• Cleaning
• Performance tests
• Calibration
3-2. Disassembly and Reassembly
WARNING
TO AVOID ELECTRICAL SHOCK, REMOVE TEST LEADS AND
ANY INPUT SIGNALS BEFORE OPENING THE CASE.
CAUTION
To avoid contamination from the fingers, handl e the pca by the
edges or wear gloves. PCA contamination can cause fail ures i n
humid environments.
Maintenance
Introduction
3
This meter contains components that can be damaged by static
discharge. To avoid damaging these components when
servicing the meter, take precautions indicat ed on t he " St at i c
Awareness" at the beginning of Section 3.
Referring to Figure 3-1 as necessary, disassemble the meter as follows. A Phillips-head
screwdriver and small flat-blade screwdriver are required.
1. Remove the test leads and set the slide-switch to OFF.
2. Remove the Phillips-head screws (H1-4) from the case bottom (MP8).
3. Separate the case top (MP2) from the case bottom.
4. TO REPLACE THE BATTERY: Lift the battery from the case bottom and insert a
new 9V battery (NEDA 1604, 6F22, or 006P). Be sure the positive and negative
battery posts are oriented correctly.
5. TO REMOVE THE PCA (A1): Insert a small, flat-blade screwdriver between the
edge of the case top and the pca where shown in Figure Gently unsnap a side of the
case top from the pca. Repeat on the other side of the pca. Unsnap the case from the
top of the pca last.
6. LIFT THE PCA FROM THE CASE TOP BY ITS EDGES. If the elastomeric contact
strips (J3, J4) for the switch assembly (S2) and LCD (U3) are stuck to the pca,
remove them without touching the conductive edges.
TO REINSERT THE PCA: Important: First make sure that the slide-switch actuator
(MP5) and slide-switch (S1) are both in the OFF position. Place the pca over the
four screw posts in the case top, then press gently on the center of the pca while
using the small flat-edge screwdriver to shoehorn the pca under the snap on a side
of the case top. Repeat on the other side and the top.
7. TO REMOVE THE SWITCH SUPPORT (MP6): Hold the case top with the face of
meter in your palm and press on the slide-switch actuator (MP5) to dislodge the
switch support. Lift out the switch support.
3-3
10, 11, 12 Multimeters
Service Manual
SWITCH ASSEMBLY (S2)
CASE TOP
DECAL (MP4)
SIDE-SWITCH
ACTUATOR (MP5)
WINDOW DECAL (MP3)
CASE TOP (MP2)
LCD (U3)
ELASTOMERIC CONTACT
STRIP, LCD (J3)
ELASTOMERIC CONTACT
STRIP, SWITCH (MP9)
TOP SHIELD
(MP7)
SWITCH SUPPORT (MP6)
BOTTOM SHIELD (MP9)
NON-SKID FOOT (MP11)
MAIN PRINTED CIRCUIT
ASSEMBLY (A1)
SHOCK ABSORBER (MP10)
9V BATTERY (BT1)
CASE BOTTOM (MP8)
4 PHILLIPS-HEAD SCREWS (H1-4)
ana02F.eps
Figure 3-1. Disassembled Unit
3-4
2
Maintenance
Disassembly and Reassembly
3
3
SNAP
SNAP
SNAPS
1
Figure 3-2. Removing and Reinserting the Printed Circuit Assembly
ana03f.eps
3-5
10, 11, 12 Multimeters
Service Manual
8. The LCD, switch assembly, slide-switch actuator, and elastomeric contact strips (J3, J4)
for the LCD and switch assembly are accessible and can replaced as needed. Do not
allow the LCD to get wet. Before installing a new LCD, make sure that all connector
contact points are clean.
9. Reassembling the meter is the reverse of disassembling it. After the meter is
reassembled, execute the PERFORMANCE TESTS to confirm that the meter is working
properly.
3-3. Cleaning
To clean the case, wipe it with a cloth lightly dampened with water and a mild detergent.
CAUTION
Do not touch the conductive edges of the elastomeric st rips or
the contacts on the switch assembly. If t hey are cont aminated,
clean them with isopropyl alcohal.
CAUTION
To avoid damaging the meter, do not use aromatic hydrocarbons or
chlorinated solvents for cleaning. These solutions will react with the
plastics used in the instruments. Do not get t he LCD wet.
Wash the pca with isopropyl alcohol or hot deionized water and a soft brush. Do not use
detergent of any kind for cleaning the pca. The pca must be completely dry before the
meter is reassembled. Dry the pca with clean dry air at low pressure (<20 psi), then bake
it at 50°C for 2 hours.
3-4. Performance Tests
TO AVOID SHOCK, DO NOT EXECUTE THE PERFORMANCE
TESTS PROCEDURES UNLESS THE METER IS FULLY
ASSEMBLED.
Use the PERFORMANCE TESTS to confirm that the meter is working properly. If the
meter fails any of these tests, it needs calibration (see CALIBRATION) or repair. The
equipment required is specified in Table 3-1.
1. Connect the calibrator to the [+] and COM jacks on the meter.
2. Refering to Table 3-2 for the Fluke 10 or Table 3-3 for the Fluke 11 or 12, put the
meter in the function and range shown for test 1.
WARNING
3-6
Table 3-1. Required Equipment
Equipment Minimum Specifications Recommended Model
DMM Calibrator DC Voltage: 0-600V
Accuracy: ±0.25%
AC Voltage: 0-600V
Accuracy: ±0.5%
Frequency: 50-400 Hz
Decade Resistor Resistance: 1.0-40 MΩ
Accuracy: ±0.25%
Decade Capacitor Capacitance: 0-1.000 µf
Accuracy: ±0.5%
3. Apply the input from the appropriate source. The reading on the display should be
within the MINIMUM and MAXIMUM values shown in
4. Test the remaining functions and ranges.
3-5. Calibration
To ensure that the meter performs to specifications, calibrate it annually using the
following procedure:
Maintenance
Calibration
Fluke Models (5700A, 5100B, or
equivalent)
General Reisistance RDS-77B
and 41B
GenRad 1412-BC
3
1. Set the calibrator for 0V dc. Put the meter in the 4.000V dc range.
2. Connect the calibrator to the [+] and COM jacks on the Meter.
3. Apply an input of +4.000V dc +/-0.25% The meter display should read between
3.997-4.003V. If it does not, adjust R4 (see Figure 3-3) as follows.
To adjust R4:
1. Remove any input signals to the meter.
2. Remove the four screws on the back and separate the case bottom and case top.
Notice that when you do so the battery remains in the case bottom and power to the
meter is disconnected.
3. Observing correct polarity, connect a 9V battery to the battery contacts using easy
hook jumpers or alligator clip leads (see Figure 3-3).
NOTE
To avoid stretching or bending the battery contacts, connect leads to the
base of the contacts as shown in Figure 3-3.
4. Set the calibrator for 0V dc. Put the meter in the 4.000V dc range.
5. Connect the calibrator to the [+] and COM jacks on the Meter.
6. Apply an input of +4.000V dc +/-0.25%
7. Adjust R4 (see Figure 3-3) so that the meter display reads between 3.997-4.003V.
3-7
10, 11, 12 Multimeters
Service Manual
Table 3-2. Performance Tests for Fluke 10
Test No. Meter Range Input To Meter Slide-Switch
Position
1 4.000V AC 0V Center 0.000 0.003
2 4.000 AC 10 mV, 50 Hz Center 0.007 0.013
3 4.000 AC 10 mV, 400 Hz Center 0.007 0.013
4 4.000 AC 3.5V, 50 Hz Center 3.395 3.605
5 4.000 AC 3.5V, 400 Hz Center 3.395 3.605
6 40.00V AC 35V, 50 Hz Center 33.95 36.05
7 40.00V AC 35V,400 Hz Center 33.95 36.05
8 400.0V AC 350V, 80Hz Center 339.5 360.5
9 600V AC 600V, 400Hz Center 580 620
10 4.000V DC 0V Center 0.002 0.002
11 40.00V DC +20 mV DC Center 00.01 00.03
12 400.0V DC -200 mV DC Center -000.3 -000.1
13 4.000V DC +3.5V Center +3.445 +3.555
14 40.00V DC -35V DC Center -35.54 -34.46
15 400.0V DC +100V DC Center +98.4 +101.6
16 600V DC -600V DC Center -610 -590
17 Continuity +2V DC Right 1.968 2.032
Display
Minimum
Display
Maximum
18 400.0Ω 0.0Ω Right 0.0 0.2
19 400.0Ω 1.0Ω Right 0.8 1.2
20 400.0Ω 350.0Ω Right 344.5 355.5
21 4.000 kΩ 1.0 kΩ Right 0.984 1.016
22 40.00 kΩ 35 kΩ Right 34.46 35.54
23 400.0 kΩ 100 kΩ Right 98.4 101.6
24 4.000 MΩ 2.9 MΩ Right 2.855 2.945
25 40.00 MΩ 35 MΩ Right 34.30 35.70
3-8
Table 3-3. Performance Tests for Fluke 11 and 12
Maintenance
Calibration
3
Test
No.
1 4.000V AC 0V Center 0.000 0.003
2 4.000V AC,MIN MAX* 0V Center 0.000 0.040
3 4.000V AC 10 mV, 50 Hz Center 0.007 0.013
4 4.000V AC 10 mV, 400 Hz Right 0.007 0.013
5 4.000V AC 3.5V, 50 Hz Right 3.430 3.570
6 4.000V AC 3.5V, 400 Hz Center 3.430 3.570
7 40.00V AC 35V, 50 Hz Center 34.30 35.70
8 40.00V AC 35V, 400 Hz Right 34.30 35.70
9††† 400.0V AC 350V, 80 Hz Right 343.0 357.0
10 600V AC 600V, 400 Hz Center 586 614
11 4.000V DC,MIN MAX* 0V Center -0.012 0.012
12 4.000V DC 0V Right -0.002 0.002
13 40.00V DC +20 mV DC Right 00.01 00.03
14 400.0V DC -200mV DC Center -000.3 -000.1
15 4.000V DC +3.5V Center +3.466 +3.534
16 40.00V DC -35V DC Center -35.33 -34.67
17 400.0V DC +100V DC Center +99.0 +101.0
18 600V DC -600V DC Center -606 -594
Meter Range Input To
Meter
Slide-Switch
Position
Display
Minimum
Display
Maximum
19 Continuity +2V DC** Right 1.980 2.020
20 Continuity, VCHEK +3.43V DC** Right 3.397† 3.463†
21 Continuity, VCHEK -0.5V DC** Right -0.507† -0.493†
22 400.0Ω 0.0Ω Right 0.0 0.2
23 400.0Ω 1.0Ω Right 0.8 1.2
24 400.0Ω 350.0Ω Right 346.6 353.4
25 4.000 kΩ 1.0 kΩ Right 0.990 1.010
26 40.00 kΩ 35 kΩ Right 34.67 35.33
27 400.0 kΩ 100 kΩ Right 99.0 101.0
28 4.000 MΩ 2.9 MΩ Right 2.873 2.927
29 40.00 MΩ 35 MΩ Right 34.44 35.56
30 Ω, VCHEK 1.96V DC Right 1.940† 1.980†
31†† 1.000µF0.0µF Right -0.001µF 0.001µF
32†† 1.000µF0.95µF Right 0.93µF 0.970µF
* MIN MAX tests are for Fluke 12 only.
** Calibrator 50Ω divider override.
† The dc volts annunciator must be on.
†† Conducting performance tests of the 400Ω, 4 kΩ, 40 kΩ, and 1 µF ranges (tests no. 22, 23, 24,
25, 26, 31, and 32) verifies that the discrete and integrated circuitry needed to support the other
capacitance ranges are working within specifications. Therefore, these tests indirectly verify that the
meter will meet specification in the 10 µF, 100 µF, 1000 µF, and 10,000 µF ranges.
††† In the V-CHEK mode, the UUT uses a low-impedance thermistor (approx. 2.5 kΩ) for circuit
protection and load testing (referred to as lo-Z input circuitry). When using the 5100B or 5700A to drive
the UUT with higher voltages, avoid an overload/current limit condition by gradually stepping the voltage
up (waiting two seconds between each step) from 90.0V, 120.0V, 180.0V and 350.0V at 80 Hz each step.
3-9
10, 11, 12 Multimeters
Service Manual
INPUT
RECEPTACLES
+
ADJUST R4 FOR 3.997-4.003V DC
CLIP TO BASE OF CONTACTS
+
_
+
9V
BATTERY
Figure 3-3. Calibration Adjustment
anao4f.eps
3-10
Chapter 4
Replaceable Parts and Schematics
Title Page
4-1. Introduction........................................................................................... 4-3
4-2. How To Obtain Parts ............................................................................ 4-3
4-3. Schematics............................................................................................ 4-3
4-4. Warranty and Service Centers.............................................................. 4-4
4-1
10, 11, 12 Multimeters
Service Manual
4-2
4-1. Introduction
This section contains an illustrated list of replaceable parts and a schematic drawing for
Series 10 Multimeters. Parts are listed by assembly; alphabetized by reference
designator. Parts unique to a specific model are identified. Each assembly is
accompanied by an illustration showing the location of each part and its reference
designator. The parts lists give the following information:
• Reference designator
• An indication if the part is subject to damage by static discharge
• Description
• Fluke stock number
• Manufacturers supply code for manufacturers. (code-to-name list at end
• of this section)
• Manufacturers’ part number or generic type
• Total quantity
• Any special notes (i.e., factory-selected part)
• Manufacturers part number or generic type
• Total quantity
• Any special notes (i.e., factory-selected part)
Replaceable Parts and Schematics
Introduction
4
A Y symbol indicates a device that may be damaged by stat i c
discharge.
4-2. How To Obtain Parts
Electrical components may be ordered directly from the manufacturer by using the
manufacturers part number, or from the John Fluke Mfg. co., Inc. and its authorized
representatives by using the part number under the heading FLUKE STOCK NO. In the
U.S. order directly from the Fluke Parts Dept. by calling 1-800-526-4731. Parts price
information is available from the John Fluke Mfg. Co., Inc or its representatives. Prices
are also available in a Fluke Replacement Parts Catalog which is available on request.
In the event that the part ordered has been replaced by a now or improved part, the
replacement will be accompanied by an explanatory note and installation instructions, if
necessary.
To ensure prompt delivery of the correct part, include the following information when
you place an order:
• Instrument model and serial number
• Description (as given under the DESCRIPTION heading)
• Quantity
• Reference designator
• Part number and revision level of the pca containing the part.
• Fluke stock number
CAUTION
4-3. Schematics
Figures 4-3 through 4-5 are schematics of the Series 10 Multimeters.
4-3
10, 11, 12 Multimeters
Service Manual
4-4. Warranty and Service Centers
The Series 10 Multimeters are warranted for two years. The warranty is printed behind
the title page of this manual. For service information, in the USA call 1-800-825-9810.
Outside the USA, contact a Fluke service center. A list of service centers is at the end of
Section 4.
NOTE w
This instrument may contain a Nickel-Cadmium battery. Do not mix with
the solid waste stream. Spent batteries should be disposed of by a qualified
recycler or hazardous materials handler. Contact your authorized Fluke
service center for recycling information.
WARNING
THIS INSTRUMENT CONTAINS A FUSIBLE RESISTOR (PN
887034). TO ENSURE SAFETY, USE EXACT REPLACEMENT
ONLY.
4-4
Table 4-1. Final Assembly
Replaceable Parts and Schematics
Warranty and Service Centers
4
REF
DES
BT 1 BATTERY,9V,0-15MA 696534 59717 216 1
H 1-4 SCREW,PH,P,THD FORM,STL,5-14,.750 832246 COMMERCIAL 4
J 3 CONN,ELASTOMERIC,LCD TO PWB,
2.050 L
J 4 CONN,ELASTOMERIC,SWITCH TO
PWB,.500 L
MP 2 CASE,TOP 89536 1 1
MP 3 DECAL,WINDOW 89536 1 2
MP 4 DECAL,CASE TOP 89536 1 3
MP 5 ACTUATOR,SWITCH 879023 89536 879023 1
MP 6 SUPPORT,SWITCH 879031 89536 879031 1
MP 7 SHIELD,TOP (FORMED) 899380 89536 899380 1
MP 8 CASE,BOTTOM 89536 1 4
MP 9 SHIELD,BOTTOM 89536 1 4
MP 10 SHOCK ABSORBER 878983 89536 878983 1
MP 11 FOOT, NON-SKID 885884 89536 885884 1
MP 12 TEST LEADS 855742 89536 855742 1
MP 13 DECAL, WARNING (FOREIGN
LANGUAGE)
S 2 SWITCH ASSEMBLY 89536 1 5
TM 1 USERS MANUAL, ENGLISH FLUKE-10 900196 89536 900196 1
TM 2 USERS MANUAL, ENG/INTL, FLUKE-10 900204 89536 900204 1
TM 3 UERSS MANUAL, ENGLISH FLUKE 11/12 900191 89536 900191 1
TM 4 USERS MNL,GER/ITA/JPN,FL-11/12 900209 89536 900209 1
TM 5 USERS MNL,ENG/FRN/SPN,FL-11/12 900212 89536 900212 1
U 3 LCD,3.5 DIGIT,MULTIPLEXED 855226 62786 855226 1
Notes
Y Static sensitive part.
DESCRIPTION FLUKE
STOCK
NO
867247 0K392 867247 1
867242 0K392 867242 1
897843 89536 897843 1
MFRS
SPLY
CODE
MANUFACTURERS
PART NUMBER OR
GENERIC TYPE
TOT
QTYNO
T
E
S
1. FOR FLUKE MODEL 10 ORDER FLUKE STOCK NUMBER 879015
FOR FLUKE MODEL 11 ORDER FLUKE STOCK NUMBER 879010
FOR FLUKE MODEL 12 ORDER FLUKE STOCK NUMBER 879007
2. FOR FLUKE MODEL 10 ORDER FLUKE STOCK NUMBER 890442
FOR FLUKE MODEL 11 ORDER FLUKE STOCK NUMBER 890447
FOR FLUKE MODEL 12 ORDER FLUKE STOCK NUMBER 890343
3. FOR FLUKE MODEL 10 ORDER FLUKE STOCK NUMBER 890467
FOR FLUKE MODEL 11 & 12 ORDER FLUKE STOCK NUMBER 890335
4. ORDER BOTTOM CASE (BOTTOM SHIELD) ASSEMBLY FLUKE STOCK NUMBER 899385.
5. FOR FLUKE MODEL 10 ORDER FLUKE STOCK NUMBER 874730
FOR FLUKE MODEL 11 ORDER FLUKE STOCK NUMBER 874727
FOR FLUKE MODEL 12 ORDER FLUKE STOCK NUMBER 874722
4-5
10, 11, 12 Multimeters
Service Manual
MP3
MP2
MP4
U3
J3
J4
MP7
S2
MP5
MP6
MP7
MP11
A1
MP10
BT1
MP9
MP8
H1-4
4-6
ana05f.eps
Figure 4-1. Final Assembly Drawing
Replaceable Parts and Schematics
Warranty and Service Centers
Table 4-2. A1 Main PCA
REF
DES
C 1 CAP,TA,0.47UF,±20%,35V 655035 56289 199D474X0035AG2 1
C 2, 5-7 CAP,POLYES,0.022UF,±10%,50V 715268 37942 37942 185-2-223K50AA 4
C 3 CAP,TA,22UF,±20%,6V,6032 876545 56289 293D226X06R3C2T 1
C 4, 11,13CAP,CER,0.1UF,±10%,25V,X7R,1206 747287 04222 12063C104KAT060B 1
C 8 CAP,TA,3.3UF,±20%,16V,3528 876552 56289 293D335X0016B2T 1
C 9 CAP,CER,0.022UF,±10%,50V,X7R,
C 10 CAP,AL,22UF,±20%,10V,SOLV
C 14 CAP,POLYES,0.01UF,±10%,1000V 822361 68919 MKS4.01/1000V/10 1 2
C 15 CAP,TA,47UF,±20%,10V,7343 867580 89536 867580 1
C 16 CAP,CER,10PF,±20%,50V,C0G 721589 04222 SR595A100MAA 1
CR 1 DIODE,SI,100 PIV,1.0 AMP 912451 04713 1N4002 1
CR 2 Y DIODE,SI,DUAL,BV=50V,
CR 3 Y DIODE,SI,BV=70.0V,
E 1 SURGE PROTECTOR,3750V,±20% 867361 91984 91984 100-HT1 1
J 1, 2 RECEPTACLE,INPUT 878988 89536 878988 2
LS 1 AF TRANSD,PIEZO,20MM 876995 59096 59096 KBS-20DB-2T-5 1
Q 1 Y TRANSISTOR,SI,NPN,SELECT
Q 2 Y TRANSISTOR,SI,PNP, SELECT
R 1 Y RES,CERM,162K,±1%,.125W,
R 2 RES,MF,332K,±1%,0.125W,100PPM 655217 59124 MF50D3323F 1
R 3 RES,MF,23.4K,±0.1%,0.125W,
R 4 RES,VAR,CERM,25K,±25%,0.2W 876300 80294 80294 3306P-1-253 1
R 5 RES,CERM,43.2K,±1%,.125W,
R 6 Y RES,CERM,226K,±1%,.125W,
R 7-9,
23, R 28
R 10 Y RES,CERM,309K,±1%,.125W,
R 11, 12 RES,MF,30.1K,±0.1%,0.125W,
R 13 RES,MF,27.1K,±0.1%,0.125W,100PPM 876289 59124 MF50D2712B 1
R 14, 15 Y RES,CERM,10K,±5%,.125W,
R 16, 18 Y RES,CERM,470,±5%,3W, 100PPM 887117 23237 GS-3-470-5% 2 2
R 17 Y RES,CERM,1M,±5%,1W 655175 19647 MS214-105-5%-
R 19 RES,MF,500,+0,-20%,
R 20, 27 Y RES,CERM,0,+.05 MAX,.125W,1206 810747 91637 CRCW1206-0R00B 2 2
1206
PROOF
IO=100MA,SOT23
IO=50MA,DUAL,SOT23
IEBO,SOT-23
ICER,SOT-23
100PPM,1206
100PPM
100PPM,1206
100PPM,1206
Y RES,CERM,1M,±1%,.125W,
100PPM,1206
100PPM,1206
100PPM
200PPM,1206
100PPM,FLMPRF,FUS
DESCRIPTION
FLUKE
STOCK
747279 04222 12065C223KAT060B 1
887245 62643 KRG10VB22RM4X7RP 1
851659 04713 MBAV74T1 1
742320 8A233 BAV99 1
821637 04713 SMBT1388LT1 1
887179 04713 SMBT1531LT1 1
876198 91637 CRCW1206-1623FB 1 2
876292 59124 MF50D2342B 1
887109 91637 CRCW1206-4322FB 1
876524 91637 CRCW1206-2263FB 1
836387 91637 CRCW1206-1004FB 5
876201 91637 CRCW1206-3093FB 1
887161 59124 MF50D3012B 2
746610 91637 CRCW1206-1002JB 2
887034 91637 91637 CMF-65 89-4500K
NO
MFRS
SPLY
CODE
MANUFACTURERS
PART NUMBER OR
GENERIC TYPE
200PPM/C
T-1
TOT
QTY
12
12
4
N
O
T
E
S
4-7
10, 11, 12 Multimeters
Service Manual
REF
DES
R 21 RES JUMPER,0.02,0.25W 682575 91637 FRJ-55 1
R 22, 29 Y RES,CERM,300,±5%,.125W,
R 24 RES,CERM,487K,±1%,.125W,
R 25 Y RES,CERM,2.2M,±5%,.125W,
R 26 Y RES,CERM,100K,±1%,.125W,
RT 1 THERMISTOR,POS,1.1K,±20%,25 C 867192 54583 911P67E112MW07 1 2
S 1 SWITCH,SLIDE,3 POSITION,5 PIN 868117 79727 868117 1
U 1 ARTIC, ASSEMBLY TESTED 858472 89536 858472 1
U 2 Y IC,CMOS,4 BIT MPU,LCD
VR 1 Y IC, 1.23V,150 PPM T.C.,BANDGAP
XBT 1, 2 CONTACT,BATTERY 897777 89536 897777 2
Y 1 RESONATOR,CERAMIC,PIEZOELEC,
Z 1 RES NET THK FILM TESTED 872234 89536 872234 1
Notes
Y Static sensitive part.
1. FOR FLUKE MODEL 10 QTY = 3 C4,11,13
FOR FLUKE MODEL 11 QTY = 3 C4,12,13
FOR FLUKE MODEL 12 QTY = 2 C4,13
2. WARNING - SAFETY RELATED COMPONENTS, USE EXACT REPLACEMENT ONLY.
DESCRIPTION
200PPM,1206
100PPM,1206
200PPM,1206
100PPM,1206
CNTRLR,80PN QFP
V. REF
2.10MHZ
Table 4-2. A1 Main PCA (cont)
FLUKE
STOCK
746362 91637 CRCW1206-3000JB 2
887112 91637 CRCW1206-4873FB 1
811778 91637 CRCW1206-2204JB 1
769802 91637 CRCW1206-104FB 1
866913 33297 UPD75304GF-XXX-3B9 1
634451 12040 LM385Z-1.2D26Z 1
876024 54583 FCR2.1MC3 1
NO
MFRS
SPLY
CODE
MANUFACTURERS
PART NUMBER OR
GENERIC TYPE
TOT
QTY
N
O
T
E
S
4-8
Replaceable Parts and Schematics
Warranty and Service Centers
4
Figure 4-2. A1 Main PCA Components
ana06f.eps
4-9
10, 11, 12 Multimeters
Service Manual
4-10
ana07f.eps
Figure 4-3. Fluke 10 Schematic
Replaceable Parts and Schematics
Warranty and Service Centers
4
Figure 4-3 Fluke 10 Schematic (cont)
ana08f.eps
4-11
10, 11, 12 Multimeters
Service Manual
4-12
ana09f.eps
Figure 4-4. Fluke 11 Schematic
Replaceable Parts and Schematics
Warranty and Service Centers
4
Figure 4-4. Fluke 11 Schematic (cont)
ana10f.eps
4-13
10, 11, 12 Multimeters
Service Manual
4-14
ana11f.eps
Figure 4-5. Fluke 12 Schematic
Replaceable Parts and Schematics
Warranty and Service Centers
4
Figure 4-5. Fluke 12 Schematic cont)
ana12f.eps
4-15
10, 11, 12 Multimeters
Service Manual
FEDERAL SUPPLY CODES FOR MANUFACTURES
4-16
SERVICE CENTERS
Replaceable Parts and Schematics
Warranty and Service Centers
4
4-17
10, 11, 12 Multimeters
Service Manual
SERVICE CENTERS (CONT)
4-18
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