Philips SCOPEMETER PM93 User manual

FLLKE AND PHILIPS - THE GLOBAL ALLIANCE IN TEST & MEASUREMENT
FI uke 93/95/97
Philips PM93/95/97
SCOPEMETER@
Service Manual
Fluke: 931605
Philips: 4822 872 05352
921201
Warning These
servicing instructions are for use by qualified personnel only. To reduce the risk
of electric shock, do not perform any servicing other than that specified in the operating
instructions unless you are fully qualified to do so.
PHILIPS

IMPORTANT
In correspondence concerning this instrument please give the model number and serial number as located on
the type number plate on the instrument.
All modifications up to production date 1 December 1992 are incorporated in this manual.
For your reference:
Model number:
Code number:
Serial number:
PMxx
9444 yyy yyyyy
OM nn mmmm(m)
Flukexx
9444 yyy yyyyy
OM nn mmmm(m)
Note:
The design of this instrument is subject to continuous development and improvement. Consequently,
this instrument mayincorporate minorchanges
in detail from the information contained in this manual.
© PHILIPS ELECTRONICS N.V., 1992
All rights reserved. No part of this publication may be reproduced by any means or in any form without written
permission of the copyright owner.
Printed in The Netherlands

CONTENTS III
TABLE OF CONTENTS Page
1 SAFETY INSTRUCTIONS
............................................. 1-1
1.1 INTRODUCTION ............................................................. 1-1
1.2 SAFETY PRECAUTIONS ...................................................... 1-1
1.3 CAUTION AND WARNING STATEMENTS ......................................... 1-1
1.4 SyMBOLS .................................................................. 1-1
1.5 IMPAIRED SAFETY ........................................................... 1-2
1.6 GENERAL SAFETY INFORMATION
................ " ............................ 1-2
2 CHARACTERiSTiCS................................................ 2-1
2.1 DISPLAY ................................................................... 2-1
2.2 SIGNAL ACQUISITION ........................................................ 2-1
2.3 CHANNELS A &B ............................................................ 2-2
2.4 TIMEBASE
.................................................................. 2-4
2.5 TRIGGER
................................................................... 2-5
2.6 SIGNAL MEMORY (MODELS 95 AND 97 ONLY)
.................................... 2-6
2.7 TRACE DISPLAY ............................................................. 2-6
2.8 SETUP MEMORY (MODEL 95 ONLY)
............................................ 2-6
2.9 SETUP MEMORY (MODEL 97 ONLY)
............................................ 2-7
2.10 CALCULATION FACILITIES (MODEL 95 ONLY) .................................... 2-8
2.11 CALCULATION FACILITIES (MODEL 97 ONLY) .................................... 2-8
2.12 CURSORS (MODELS 95 AND 97 ONLY)
.......................................... 2-9
2.13 MULTIMETER ............................................................... 2-9
2.14 AUTO SETTING
............................................................. 2-14
2.15 GENERATOR (MODEL 93 AND 95)
............................................. 2-16
2.16 GENERATOR (MODEL 97 ONLY)
.............................................. 2-16
2.17 POWER ADAPTOR
IBA TTERY CHARGER ....................................... 2-17
2.18 POWER SUPPLY
........................................................... 2-18

IV
CONTENTS
2.19 MECHANiCAL .............................................................. 2-19
2.20 ENViRONMENTAL .......................................................... 2-19
2.21 INTERFACE (MODEL 97 ONLY) ................................................ 2-21
2.22 SAFETy ................................................................... 2-22
2.23 ACCESSORIES
............................................................. 2-23
2.24 SERVICE AND MAINTENANCE
................................................ 2-23
3 CIRCUIT DESCRIPTIONS ............................................. 3-1
3.1 INTRODUCTION TO CIRCUIT DESCRIPTION ...................................... 3-1
3.1.1 General ............................................................. 3-1
3.1 .2 Location of electrical parts .............................................. 3-1
3.2 FUNCTIONAL BLOCK DESCRIPTION ............................................ 3-2
3.2.1 Introduction .......................................................... 3-2
3.2.2 Data acquisition
...................................................... 3-4
3.3 DIGITAL CIRCUITS (A1)
....................................................... 3-6
3.3.1 Introduction .......................................................... 3-6
3.3.2 Overview digital circuits
................................................ 3-6
3.3.3 MICROPROCESSOR circuitry (IlP)
....................................... 3-7
3.3.4 DIGITAL ASIC (D-ASIC) circuitry
......................................... 3-9
3.3.5 LCD circuitry
........................................................ 3-12
3.4 ANALOG CIRCUITS (A2)
...................................................... 3-14
3.4.1 Introduction ......................................................... 3-14
3.4.2 Overview analog circuits
............................................... 3-14
3.4.3 ATTENUATOR sections, CHANNEL A and B
.............................. 3-14
3.4.4 EXTERNAL (BANANA) INPUT/OUTPUT circuitry
........................... 3-18
3.4.5 ANALOG ASIC (A-ASIC) and ADC circuitry
................................ 3-20
3.4.6 ANALOG CONTROL CIRCUIT .......................................... 3-24
3.4.7 GENERATOR circuit.
................................................. 3-30
3.4.8 BATTERY CHARGER ................................................ 3-32
3.4.9 POWER SUPPLY
.................................................... 3-34
4 PERFORMANCE VERIFICATION PROCEDURE ........................... 4-1
4.1 GENERAL INFORMATION ..................................................... 4-1
4.2 STANDARD PERFORMANCE VERIFICATION PROCEDURE ......................... 4-2
4.3 STANDARD PERFORMANCE VERIFICATION PROCEDURE
SUMMARy ............... 4-16
4.4 ADDITIONAL PERFORMANCE VERIFICATION PROCEDURE
........................ 4-17

CONTENTS v
5 CALIBRATION ADJUSTMENT PROCEDURE ............................. 5-1
5.1 GENERAL INFORMATION ..................................................... 5-1
5.2 RECOMMENDED CALIBRATION ADJUSTMENT EQUIPMENT ........................ 5-1
5.3 ENTERING THE CALIBRATION PROCEDURE ..................................... 5-2
5.4 OPERATING THE CALIBRATION PROCEDURE
.................................... 5-3
5.5 CONTRAST CALIBRATION ADJUSTMENT PROCEDURE
............................ 5-4
5.6 SCOPE CALIBRATION ADJUSTMENT PROCEDURE
............................... 5-4
5.6.1 Hardware SCOPE Calibration Adjustments ................................. 5-4
5.6.2 Closed Case SCOPE Calibration Adjustments
............................... 5-8
5.7 METER CALIBRATION ADJUSTMENT PROCEDURE
.............................. 5-15
5.8 CALIBRATION ADJUSTMENT PROCEDURE SUMMARY
............................ 5-24
6 DISASSEMBLING THE SCOPEMETER .................................. 6-1
6.1 GENERAL INFORMATION ..................................................... 6-1
6.2 DISASSEMBLY PROCEDURES ................................................. 6-1
6.2.1 Removing the battery pack .............................................. 6-2
6.2.2 Op
.. ening the ScopeMeter ............................................... 6-2
6.2.3 Removing the analog A2 PCB, to enable Hardware
SCOPE Calibration Adjustments ......................................... 6-4
6.2.4 Removing the digital A1 PCB
............................................ 6-4
7 CORRECTIVE MAINTENANCE ........................................ 7-1
7.1 DIAGNOSTIC TESTING AND TROUBLESHOOTING ................................ 7-1
7.1.1 Introduction .......................................................... 7-1
7.1.2 Troubleshooting techniques ............................................. 7-1
7.1 .3 Display and error messages ............................................. 7-2
7.1.4 Main tests
........................................................... 7-5
7. 1.4. 1 Operation Verification Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
7. 1.4.2 Performance Verification Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7
7.1.5 Troubleshooting
...................................................... 7-7
7.1.5.1 Trouble shooting hints . ........................................ 7-7
7.1.6 Digital
A1 PCB Troubleshooting .......................................... 7-7
7. 1.6. 1 Powering the ScopeMeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7
7.1.6.2 Kernel Test. ................................................. 7-7
7. 1.6.3 Test point signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
7.1.6.4 Default signals measured in the digital circuits. ..................... 7-11
7.1.7 Analog A2 PCB Troubleshooting ........................................ 7-28
7. 1.7. 1 Test pointsignals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28
7. 1.7.2 Default signals measured on the Analog A2 pcb. . . . . . . . . . . . . . . . . . . . 7-31
7.2 REPLACEMENTS ........................................................... 7-40
7.2.1 Standard parts ...................................................... 7-40
7.2.2 Special parts ........................................................ 7-40

VI
7.2.3
7.2.4
7.2.5
CONTENTS
Transistors and integrated circuits ....................................... 7-40
Static-sensitive components ............................................ 7-40
Replacement of parts
................................................. 7-42
7.2.5. 1 Replacing parts in the batterycompartment. ....................... 7-42
7.2.5.2 Replacing parts on front cover . ................................. 7-43
7.2.5.3 Replacing parts on bottom cover . ............................... 7-45
7.2.5.4 Stand replacement . .......................................... 7-47
7.2.5.5 30-pole flat cable replacement . ................. ' ................ 7-47
7.2.5.6 Input unit assembly replacement . ............................... 7-48
7.2.5.7 Top coverassembly replacement. ............................... 7-48
7.2.5.8 Keypad replacement. ......................................... 7-49
7.2.5.9 Liquid crystal display (LCD), contact strips and
backlight foil (Model 97 only) replacement . ........................ 7-49
7.3 SOLDERING TECHNIQUES
................................................... 7-51
7.3.1 General soldering techniques ........................................... 7-51
7.3.2 Soldering micro-miniature semiconductors ................................. 7-51
7.4 SPECIAL TOOLS ............................................................ 7-52
7.4.1 Extender flat cable
................................................... 7-52
7.5 RECALIBRATION AFTER REPAIR
.............................................. 7-52
7.6 INSTRUMENT REPACKING
................................................... 7-52
8 MAINTENANCE OF THE PRIMARY CIRCUIT (PM89071...) ................... 8-1
9 REPLACEABLE PARTS LIST ......................................... 9-1
9.1 INTRODUCTION ............................................................. 9-1
9.2 HOW TO OBTAIN PARTS ...................................................... 9-2
10 CIRCUIT DIAGRAMS ............................................... 10-1
11 MODIFiCATIONS ................................................... 11-1
11.1 HARDWARE MODIFICATIONS, PCB REVISION LEVELS ............................ 11-1
11.2 DIGITAL BOARD A1 REVISION LEVEL OVERVIEW ................................ 11-1
11.3 ANALOG BOARD A2 REVISION LEVEL OVERVIEW ............................... 11-4
11.4 FIRMWARE MODIFICATIONS
................................................ 11-12

SAFETY INSTRUCTIONS 1 - 1
1 SAFETY INSTRUCTIONS
Read this chapter carefully before installation and use of the instrument.
1.1 INTRODUCTION
The following sections contain information, cautions and warnings which must be followed to ensure
safe operation and to keep the instrument
in a safe condition.
WARNING: Servicing described in this manual is to be done only by qualified service
personnel. To avoid electrical shock, do not service the instrument unless you
are qualified to do so.
1.2 SAFETY PRECAUTIONS
Forthe correct and safe use ofthis instrument it is essential that both operating and service personnel
follow generally accepted safety procedures
in addition to the safety precautions specified in this
manual. Specific warning and caution statements, where they apply, will be found throughout the
manual. Where necessary, the warning and caution statements and/or symbols are marked on the
instrument.
1.3 CAUTION AND WARNING STATEMENTS
1.4
CAUTION: Is used to indicate correct operating or maintenance procedures in order to
prevent damage to or destruction of the equipment or other property.
WARNING: Calls attention to a potential danger that requires correct procedures or
practices in order to prevent personal injury.
SYMBOLS
~
V
-3
[gJ
@
@
A
Caution (refer to accompanying documents)
Common input symbol, equipotentiality.
High BNC input symbol.
Equipment protected throughout by DOUBLE INSULATION or REINFORCED
INSULATION
Ground symbol
Recycling symbol
Static sensitive components (black/yellow)

1 - 2 SAFETY INSTRUCTIONS
1.5 IMPAIRED SAFETY
Whenever it is likely that safety has been impaired, the instrument must be turned off and
disconnected from all external voltage sources, and the batteries must be removed. The matter
should then be referred to qualified technicians. Safety is likely to be impaired if, for example, the
instrument fails to perform the intended measurements or shows visible damage.
1.6 GENERAL SAFETY INFORMATION
WARNING: Removing the instrument covers or removing parts, except those to which
access can
be gained by hand, is likely to expose live parts and accessible
terminals which can be dangerous to life.
The instrument must be disconnected from all voltage sources and batteries must be removed before
it is opened.
Capacitors inside the instrument can hold their charge even if the instrument has been separated
from all voltage sources and batteries are removed. Components which are important for the safety
of the instrument may only be replaced by components obtained through your local FLUKE/PHILIPS
organization. These components are indicated by an asterisk (*) in the parts list section (chapter 9).

CHARACTERISTICS 2 - 1
2 CHARACTERISTICS
2.1
A. Performance Characteristics
-PHILIPS and FLUKE guarantee the properties expressed in numerical values with stated
tolerance. Specified non-tolerance numerical values indicate those that could be nominally
expected from the mean of a range of identical instruments.
-For definitions of terms, reference
is made to I EC Publication 351-1 .
-The accuracy of all measurements
is within ± {(% of reading) ±(one least-significant digit)}
from 18C to 28C.
Add
0.1 x (specified accuracy)/C for < 18C or> 28C ambient.
B. Safety Characteristics
The instrument 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. This
manual contains information and warnings that must be followed by the userto ensure safe operation
and to keep the instrument
in a safe condition.
DISPLAY
CHARACTERISTICS SPECIFICATIONS ADDITIONAL INFORMATION
* Type LCD
* Useful Screen Area 84 mm x 84
mm 1 div equals 25 pixels.
1 div equals 8.75 mm.
Resolution 240 x 240 pixels
* Contrast Ratio Adjustable via LCD Menu.
* Backlight (Model 97 only) Electro Luminescence
2.2 SIGNAL ACQUISITION
* Sampling Type
@ 1 ~s/div ... 60s/div
@ 10 ns/div ... 500 ns/div
* Maximum Sample Rate
* Maximum Vertical
(voltage) Resolution
* Maximum Horizontal
(time) Resolution
* Record Length
With capture 20 div
With capture 10 div
Real Time
Quasi Random
25 MS/s
8 bits
25 Samples/div
512 Samples
256 Samples
Sampling Rate depends
on time/div
setting.
Over 10 divisions.
Per Channel.
Per Channel.
Per Channel.

2-2
2.3
CHARACTERISTICS
CHARACTERISTICS SPECIFICATIONS ADDITIONAL INFORMATION
* Acquisition Time
(for 20.4 div)
60s/div...1 Jls/div 20.5 x time/div + 140 ms Excluding delay time.
Delay time is the selected trigger
delay.
500 ns/div...10 ns/div 20.5 x time/div + 120 ms Excluding delay time.
In Quasi-Random Mode, the
acquisition time depends on
triggers.
* Sources Channel ±A Inverted Channel A only for
Channel ±B software V4.01 and higher
mV Input versions.
* Acquisition Modes 1 Channel Only CHAN
A, CHAN B
2 Channels Chopped Mode from
60s/div
... 50 Jls/div.
Alternating Mode from
20 Jls/div ... 10 ns/div.
CHANNELS A & B
* Signal Inputs Isolated BNC Signal input BNC commons are
connected together.
Common Input Black Safety Banana Jack Part
of External Trigger Input.
* Input Impedance Frequency dependent, see
Figure 2.1.
R parallel 1 MQ ±
1%
For DC coupled input. For AC
coupled input or GND, add 22 nF
in
series with Rand C parallel.
C parallel 25 pF
MAX. INPUT
IMPEDANCE
100Mn
I
-----------t---------:
1Mn
100kn
10kn
1kn
1 oon '-------'"----'------'-----"--- ............ "'----'
1k 10k 100k 1M 10M 100M
---- FREQUENCY (Hz)
Figure 2. 1 Max. Input Impedance Versus Frequency

CHARACTERISTICS
CHARACTERISTICS
* Input Coupling
* Maximum Input Voltage
(rms)
MAX. PEAK
VOLTAGE
I 4251----+--""""
10
1k 10k 100k
SPECIFICATIONS
AC DC
GND
300 V
1M 10M 100M
--_. FREQUENCY (Hz)
Figure 2.2 Max Input Voltage Versus Frequency
* Deflection Coefficient
Steps
Steps
Error Limit
Overall
Nonlinearity
* Dynamic Range
* Position Range
(move control)
* Frequency Response
Lower Transition Point
of Bandwidth
DC Input Coupling
AC Input Coupling -3dB
Upper Transition Point
of Bandwidth
1 mV/div...2 mV/div
(Models 95 and 97 only)
5 mV/div...100V/div
± (2% ± 1 digit)
± (2% ± 1 digit)
9.5 div
4 div
- 4
div ...+ 4 div
DC
::;; 10 Hz
~ 50 MHz (-3 dB)
2-3
ADDITIONAL INFORMATION
Sequence: ac-dc-GND (pre-charge
ac), and back to ac.
Frequency dependent see fig. 2.2
Between BNC inner and outer
contact. Outer BNC contacts and
Ground (Black) Banana Jack are
internally connected together.
Only for repetitive signals and
timebase 60s...1
~s. If one of the
channels is in this sensitivity, both
channels will be switched to
Average =
4.
In a 1-2-5 sequence of 14 positions.
Add 3% for 1
mV and 2 mV
per IEC 351 for frequencies
< 1 MHz.
for frequencies < 10 MHz.
for frequencies up to
50 MHz.
Z source =
500.
< 1 Hz including 10 MO probe.
Subtract 5 MHz for <
18°C
and> 28°C Ambient.
Rise time 7 ns.

2-4
CHARACTERISTICS
CHARACTERISTICS SPECIFICATIONS ADDITIONAL INFORMATION
* Max. Baseline Instability
Jump 0.1 div or 1 mV The baseline is automatically
readjusted after switching the
attenuator or AC/DC/GND.
* Average Running Average.
(Models 95 and 97 only)
Maximum Constant 256x
Constant in Roll 10x
* MIN MAX Channel A only.
(Models 95 and 97 only)
Timebase setting
~ 1 ~s/div
Pulse-width for 100% 40 ns
Probability
Pulse-width for
25%
10 ns
Probability
* ZOOM Expansion or compression
in 1,2,5
(Models 95 and 97 only) sequence around the 4th division.
Range for Delay < 640 div
2.4 TIMEBASE
* Modes Recurrent
Single Shot
Roll Automatic selected.
* Ranges
Recurrent 5s/div
... 10 ns/div
Dual Channel Chopped 5s/div
... 50 ~s/div
Dual Channel Alternate 20
~s/div ... 10 ns/div
Single Shot 5s/div
... 10 ns/div Every sweep needs a trigger.
A sweep first; B sweep arms
automatically.
For 500 ns, 200 ns, and 100 ns; an
automatic interpolation takes place.
Chopped.
Roll Mode 60s/div...1Os/div
Maximum Timebase Error ± 0.1% ± 1 LSB

CHARACTERISTICS
2-5
CHARACTERISTICS SPECIFICATIONS ADDITIONAL INFORMATION
2.5 TRIGGER
* Sources Selected independently.
Channel A Signal CHANA
Channel B Signal CHAN B
External Trigger Input EXT
* External Trigger Input Dual Safety Banana Jack External Trigger Input common
Connector (low) jack is electrically
connected to the Channel A and
Channel B commons (outer
contact of BNC's).
* External Trigger Input
Impedance
R parallel 1 MQ ± 1% If used for mV DC > 1 MQ.
C parallel 25 pF Including Banana to BNC adapter.
* Trigger Error For frequencies < 1 MHz.
Voltage Level ± 1 LSB 5s/div
... 50 Jls/div.
± 0.5 div 20 Jls/div
... 10 ns/div.
Time Delay ± 1 LSB ± 5 ns
* Maximum External Trigger 300 V Frequency dependent, see fig. 2.2.
Input (rms)
* Trigger Sensitivity For Models 95 and 97, values must
be multiplied by 5
in 2 mV/div. and
1 mV/div.
Channel A or B
@ 100 MHz ~ 4 div
@ 60 MHz
~ 1.5 div
@ 10 MHz
~ 0.8 div
External Trigger Input
TTL logic compatible using 10:1
attenuation Probe.
* Trigger Slope Selection positive going
negative going
* Trigger Level Control
Range
Channel A or B ±4 div
Trigger at 50% 0.5 x peak/peak value Measured during 20 ms.
External Trigger Input Fixed @ TTL:10 Switchable to TTL via set-up menu.

2-6
2.6
2.7
2.8
CHARACTERISTICS
N-cycle mode
(Models 95 and 97 only)
5s/div ... 1 /ls/div, N=
Events (5s/div...1 /ls/div)
* Trigger Delay
Range
SPECIFICATIONS
2 ... 255
1...1023
-20...640 div
CHARACTERISTICS
ADDITIONAL INFORMATION
For timebase settings from
20 /ls/div...1 /ls/div acquisition and
trigger on Channel A only.
Start via Ext; count with channel
A.
SIGNAL MEMORY (MODELS 95 AND 97 ONLY)
* Signal Memory Size
Memories 8 Memory
#1 up to #8.
Memory Depth 512 words
Wordlength 8 Bit
Functions Store Storage of signals.
Save Contents of Channel A and
Channel B are saved in temp
memory
#1 and #2, and (A ± B) in
temp memory #3.
TRACE DISPLAY
* Sources Channel A A Maximum of 4 traces plus A vs B
ChannelB can be selected.
A±B
Avs B
Memory
#1 up to #8 (Models 95 and 97 only).
* Position range
Horizontal + 4 div...-16.5 div
Vertical - 4 div...+ 4 div From screen center, select per
trace.
SETUP MEMORY (MODEL 95 ONLY)
* Memory Size 8 maximum Combined with waveform.

CHARACTERISTICS
CHARACTERISTICS
SPECIFICATIONS
2.9 SETUP MEMORY (MODEL 97 ONLY)
* Memory Size
* Functions
With soft up/down keys
* Initial setup
selection of AUTO SET
trace identification
trigger identification
trigger sensitivity external
Clear after Hold/Run
refresh time @ RECORD
in scope mode
10 maximum
Save
Delete
Recall
Next
Previous
only Amplitude
only Time
Time and Amplitude
on/off
on/off
0.2V/2V
on/off
infinite
2 seconds
5 seconds
10 seconds
60 seconds
ADDITIONAL INFORMATION
Front Panel setups.
Actual front panel settings are
stored in memory, replacing
contents of memory location
indicated on LCD.
Contents of
memory location
indicated on LCD are deleted.
2-7
Actual front panel settings are
replaced by contents of memory
location indicated on LCD.
Actual settings are replaced by
contents of the next (+1) memory
location indicated on LCD.
Actual settings are replaced by
contents of the previous (-1)
memory location indicated on LCD.

2-8
CHARACTERISTICS
CHARACTERISTICS SPECIFICATIONS ADDITIONAL INFORMATION
2.10 CALCULATION FACILITIES (MODEL 95 ONLY)
* Measurement Functions
delta V
delta t
RMS value
Mean (Average) value
Peak to Peak value
Rise or Fall time
Frequency
1 + delta t
Maximum value
Minimum value
Phase
Trigger time to cursor
Ratio
Maximum of 5 simultaneous
measurement functions.
of portion between portion.
Expression of value
in % or
absolute on anyone of the above
values.
2.11 CALCULATION FACILITIES (MODEL 97 ONLY)
* Measurement Functions
* Mathematics
delta V
delta t
RMS value
Mean (Average) value
Peak to Peak value
Rise or Fall time
Frequency
1 + delta t
Maximum value
Minimum value
Phase
Trigger time to cursor
Ratio
Multiplication
Add
Subtract
Filter
Invert
Integrate
Maximum of 5 simultaneous
measurement functions.
of portion between portion.
Expression of value
in % or
absolute on anyone of the above
values.
of whole memory or Channel.
For timebase settings
20 ~s ...10 ns, only displayed
Channels can be used.

CHARACTERISTICS
CHARACTERISTICS SPECIFICATIONS
2.12 CURSORS (MODELS 95 AND 97 ONLY)
* Horizontal
Display Resolution 25 parts per div
Digital Readout Resolution 3 digits
Error Limit
Cursor Range Visible part of signal
* Vertical
Display Resolution 25 parts per div
Digital Readout Resolution 3 digits
Error Limit
±2%
2.13 MULTIMETER
2-9
ADDITIONAL INFORMATION
Cursors cannot pass each other.
Referred to input at BNC or Probe
tip, after Probe recalibration.
The Multimeter uses the Channel A inputfor VDC & VAC measurements and the Safety Banana Jack
Inputs for Resistance, Diode Test, Continuity, and DC mV measurements. An internal reference is
used to optimize the accuracy of the Channel A Input and any probes used. The accuracy of all
Multimeter measurements
is within ±{(% of reading) + (number of least-significant digits)} from 18°C
to 28 °C with relative humidity up to 90% for a period of one year after calibration. Add 0.1 x (specified
accuracy)/C for
18°C or 28 °C Ambient.
-Displayed range include used probe, if calibrated.
-Values listed are without attenuating probe.
- A Vrms
AC and V DC dual display mode is optimized for power line (mains) related
measurements.
* DC Voltage
Ranges
Resolution
Accuracy
Digital Display
Display update
Response Time
Zeroing
Series Mode Rejection
Ratio
300 mV, 3V, 30V & 300V
0.1 mV, 1 mV, 0.01 V,
& 0.1V
± (0.5% + 5)
3000 counts
< 300 ms
< 3.5s
automatic
> 50 dB @ 50 Hz
or 60 Hz
Manual or automatic ranging on
peak voltage. High Voltage x1 0
Probe extends measurement to
600V. Peak voltage is 2.5x range,
except 375V
in 300V range.
Multiply x1 0 with High Voltage
Probe.
Up to 4500 counts, 3500 counts
in
300V range.

2 - 10
CHARACTERISTICS
* AC Voltage
Ranges
Resolution
Accuracy (AC Coupled)
Using High Voltage 10:1
Probe
SO Hz...60 Hz
20 Hz ... 20 kHz
S Hz...1 MHz
Accuracy (DC Coupled)
Using High Voltage 10:1
Probe
SO Hz ... 60 Hz
1 Hz
... 20 kHz
Crest Factor
Digital Display
Display Update
Response Time
@ Input freq >SO Hz
SMOOTH
FAST
DC Common Mode
Rejection Ratio
AC Common Mode
Rejection Ratio
SPECIFICATIONS
300
mV, 3V, 30V, 2S0V
0.1 mV, 1 mV, 0.01V, 0.1V
± (1% + 10)
± (2% + 1S)
± (3% + 20)
± (2% + 1S)
3000 counts
< 300 ms
< 3.Ss
< 10s
< 1s
> 100 dB @ dc
> 100 dB @
SO, 60, or 400 Hz
> 60 dB @ dc
.. 60 Hz
CHARACTERISTICS
ADDITIONAL INFORMATION
Manual or automatic ranging on
peak voltage.
High Voltage x10 Probe extends
measurement to 600V. Peak
voltage
is 2.Sx range and 37SV in
2S0V range.
Multiply x1 0 with High Voltage
Probe.
Valid from SO/0 .. 1 00% of range.
For <
10Hz with 10:1 probe or
< 100 Hz direct (1:1 probe), use
function VAC + DC
Additinal error ± 1% > 1 kHz
Meter prevents crest factor errors
by autoranging on input waveform
peaks.
Up to 4S00 counts,
at 2S0V range: 2S00.

CHARACTERISTICS
CHARACTERISTICS
* Resistance
Open Circuit Voltage
Full Scale Voltage
300
3000 ... 3 MO
30 MO
Ranges
Resolution
Accuracy
Digital Display
Measurement Current
Display Update
Response Time
SMOOTH
FAST
Protection
Continuity
Beeps if resistance is <:
* Diode Test
Maximum Voltage
Range
Resolution
Accuracy
Digital Display
Measurement Current
Display update
Response Time
SMOOTH
FAST
Protection
Polarity
Continuity (Alert)
SPECIFICATIONS
<4V
< 25mV
< 250 mV
<2V
300
3000, 3 kO, 30 kO,
300 kO, 3 MO, 30 MO
0.010
0.1 W, 0.001 kW, 0.01 kW,
0.1 kO, 0.001 MO, 0.01 MO
(25% + 25)
± (0.5% + 5)
3000 counts
0.5 mA ... 70 nA
< 300 ms
< 3.5s
< 10s
< 1s
600V RMS
5% of selected
4V
2.800V
0.001V
± (20/0 + 5)
3000 counts
0.5 mA
< 300 ms
< 3.5s
< 10s
< 1s
600 V RMS
+ on RED Banana Jack
-on BLACK Banana Jack
Beeps if reading is below 1V
2 -
11
ADDITIONAL INFORMATION
Manual ranging only 1)
Manual or automatic ranging.
1) 30n only in software version 4.01
and higher.
300 range.
all other ranges.
Up to 9999 counts
in 30n range.
Up to 3000 counts
in 30 Mn range.
Up to 4500 counts
in all other ranges.
Decreases as range increases.
OL is indicated if measured voltage
is> 2.8V.
If value> 2800 readout gives OL.