Tektronix 2002 User manual
Model 2002
8.5 Digit Multimeter
Getting Started Manual
2002-903-01 Rev. B September 2022
tek.com/keithley
*P2002-903-01B*
2002-903-01B
Model 2002 Multimeter
Getting Started Manual
©2022, Keithley Instruments, LLC
All rights reserved.
Cleveland, Ohio, U.S.A.
These are the original instructions in English.
All Keithley Instruments product names are trademarks or
registered trademarks of Keithley Instruments, LLC.
Other brand names are trademarks or registered
trademarks of their respective holders.
Document Number: 2002-903-01 Rev. B September 2022
Safety precautions
The following safety precautions should be observed before using this product and any associated instrumentation. Although
some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous
conditions may be present.
This product is intended for use by personnel who recognize shock hazards and are familiar with the safety precautions required
to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the
product. Refer to the user documentation for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the
equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures
explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.
Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained
service personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that are measurement, control, and data I/O connections, with low
transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient
overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient
overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to
mains. These instruments will be marked as category II or higher.
Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instrument to mains.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test
fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than
30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any
unknown circuit before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If
the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.
Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited
sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective
devices to limit fault current and voltage to the card.
Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the
connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input
power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before connecting or disconnecting
cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.
For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or
accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be
impaired.
Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the
specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.
When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)
connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use
of a lid interlock.
If a screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.
The symbol on an instrument means caution, risk of hazard. The user must refer to the operating instructions located in the
user documentation in all cases where the symbol is marked on the instrument.
The symbol on an instrument means warning, risk of electric shock. Use standard safety precautions to avoid personal
contact with these voltages.
The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.
The symbol indicates a connection terminal to the equipment frame.
If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be
properly disposed of according to federal, state, and local laws.
The WARNING heading in the user documentation explains hazards that might result in personal injury or death. Always read
the associated information very carefully before performing the indicated procedure.
The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may
invalidate the warranty.
The CAUTION heading with the symbol in the user documentation explains hazards that could result in moderate or minor
injury or damage the instrument. Always read the associated information very carefully before performing the indicated
procedure. Damage to the instrument may invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits — including the power
transformer, test leads, and input jacks — must be purchased from Keithley. Standard fuses with applicable national safety
approvals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument may
only be replaced with a similarly rated power cord. Other components that are not safety-related may be purchased from other
suppliers as long as they are equivalent to the original component (note that selected parts should be purchased only through
Keithley to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement
component, call a Keithley office for information.
Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the following
environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F); and pollution degree 1 or 2.
To clean an instrument, use a cloth dampened with deionized water or mild, water-based cleaner. Clean the exterior of the
instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that
consist of a circuit board with no case or chassis (e.g., a data acquisition board for installation into a computer) should never
require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board
should be returned to the factory for proper cleaning/servicing.
Safety precaution revision as of June 2018.
Table of Contents
1
Front Panel Operation
Product overview.................................................................................1-2
Display ................................................................................................1-8
Power-up..............................................................................................1-8
Bench defaults.....................................................................................1-9
Voltage measurements.......................................................................1-10
Current measurements.......................................................................1-11
Two and four-wire resistance measurements ....................................1-12
Frequency measurements..................................................................1-14
Temperature measurements...............................................................1-16
2
Measurement Options
Multiple displays.................................................................................2-2
Menus..................................................................................................2-6
Relative..............................................................................................2-10
Trigger...............................................................................................2-11
Speed.................................................................................................2-14
Resolution..........................................................................................2-15
Filter ..................................................................................................2-16
Buffer (Data Store)............................................................................2-18
Math ..................................................................................................2-20
Internal scanning ...............................................................................2-22
External scanning..............................................................................2-26
3
IEEE-488 Bus Operation
Software support..................................................................................3-2
IEEE-488 bus standards ......................................................................3-3
IEEE-488 bus connections ..................................................................3-3
Primary address selection....................................................................3-4
Common commands............................................................................3-5
SCPI commands..................................................................................3-6
SCPI command syntax ........................................................................3-7
SCPI signal oriented commands .......................................................3-11
SCPI subsystem commands ..............................................................3-12
Program examples.............................................................................3-18
4
Specifications
1
Front Panel
Operation
1-2
Front Panel Operation
Product overview
If you have any questions after reviewing this information, please contact your local
Keithley Instruments office, sales partner, or distributo
corporate headquarters (toll-free inside the U.S. and Canada only) at 1-800-833-9200. For
worldwide contact numbers, visit tek.com/en/contact-tek.
The Model 2002 is an 8½-digit multimeter with the following measurement capabilities:
• DC voltage measurements from 1nV to 1100V
• AC RMS voltage measurements from 100nV to 750V, 1100V peak
• DC current measurements from 10pA to 2.1A
• AC current measurements from 100pA to 2.1A
• 2-wire resistance measurements from 100nΩ to 1.05GΩ
• 4-wire resistance measurements from 100nΩ to 2.1MΩ
• Frequency measurements from 1Hz to 15MHz
• RTD temperature measurements from -200°C to +630°C
• Thermocouple temperature measurements (with optional card) from -200°C to +1820°C
r. You can also call the Tektronix
Figure 1
Measurement ranges
(resolution)
DC Voltage
AC Voltage Bandwidth
Peak Spikes–Repetitive
AC Voltage
DC Current
DC In-Circuit Current
AC Current
Frequency
Frequency Sensitivity
Temperature–RTD
Peak Spikes–Single
Resistance (2-wire)
Resistance (4-wire)
Ohms Source Current
Period
Temperature–TC
Crest Factor
1p
12
–
10
10
1nV
10pA
100pA
Logarithmic scale
1n
–
9
100nV
60ns
100nΩ
100nΩ
500ns
1.4µA
2µs
1µ
10
–
6
100µA
0.001°
0.001°
1m
10
60mV
1
–
3
10
1Hz
1Hz
20Hz
7.2mA
0
2.1A
12A
2.1A
1 second
16 seconds
16 seconds
10
600V
630°
3
1100V
1100V
1820°C
10
6
2MHz
1MHz
2.1M
10
15MHz
Ω
9
1G
Ω
1G
1M
1k
Front Panel Operation 1-3
Some additional capabilities of the Model 2002 include:
• Data storage with burst mode capability
• Scan (measure) channels of an external scanner (e.g., Model 7001 or 7002)
• Single button zeroing (REL)
• Built-in math functions
• Digital filtering
• Remote operation using the IEEE-488 bus
By installing the appropriate option card, the capabilities of the Model 2002 are extended as
follows:
• Scan internal channels (Model 2001-SCAN Scanner Card or Model 2001-TCSCAN
Thermocouple Scanner Card)
• Perform thermocouple temperature measurements (Model 2001-TCSCAN Thermocouple Scanner Card)
• Extend the voltage and resistance measurement ranges (Model 1801 Nanovolt Preamp)
The Model 2002 front and rear panel overvie ws (Figures 2 and 3) include important abbrevi-
ated information that should be reviewed before operating the instrument.
1-4 Front Panel Operation
Figure 2
Model 2002
front panel
overview
Primary Display Line
1
3
7
Secondary Display Line
SENSE
PREV
DISPLAY
NEXT
POWER
5
ERR REM TALK LSTN SRQ REAR REL FILT MATH 4W AUTO ARM TRIG SMPL
Range : 200mVDC
DCV ACV DCI ACI Ω2 Ω4
REL TRIG
INFO LOCAL EXIT ENTER
2
STORE RECALL
CHAN SCAN
FILTER MATH
CONFIG MENU
6
FREQ TEMP
2002 MULTIMETER
RANGE
AUTO
RANGE
Ω 4 WIRE
350V
PEAK
FR
FRONT/REAR
INPUTS
CAL
INPUT
HI
1100V
!
PEAK
LO
500V
PEAK
2A 250V
AMPS
8
1 ANNUNCIATORS
ERR Questionable reading
REM In remote
TALK Addressed to talk
LSTN Addressed to listen
SRQ Service Request
REAR Reading acquired from rear inputs
REL Relative reading displayed
FILT Digital filter enabled
MATH Math calculation enabled
4W 4-wire resistance reading displayed
AUTO Autoranging enabled
ARM Trigger armed; not in idle
*(asterisk) Reading being stored
2 FUNCTION KEYS Select measurement function (DC and AC voltage, DC and AC cur-
rent, 2-wire and 4-wire resistance, frequency, and temperature)
3 RANGE KEYS
▲ Moves to higher range; increments digit
▼ Moves to lower range; decrements digit
AUTO Enables/disables autorange
4
Front Panel Operation 1-5
4 HANDLE (not shown) Pull out and rotate to desired position
5 DISPLAY KEYS PREV/NEXT Scroll through multiple displays of a function
6 OPERATION KEYS
REL Enables/disables relative reading
TRIG Triggers unit
STORE Enables data storage
RECALL Displays reading data (reading, number, time). Use PREV/NEXT DISPLAY for
maximum, minimum average, standard deviation
FILTER Displays digital filter status for present function and toggles filter on/off
MATH Displays math calculation and toggles math on/off if configured
and Moves cursor among data entry digits, menu selections, and information displays
INFO Shows context-sensitive information about the present display
LOCAL Cancels IEEE-488 remote
CHAN Selects internal scanner channel to measure (1-10)
SCAN Performs scan of internal or external scanner channels, or ratio or delta
CONFIG Configures functions and operations
MENU Saves/restores instrument conditions; sets up GPIB; performs calibration and
self-tests; defines limits, buffer, digital I/O, autozero
EXIT Cancels selection, moves back within menu structure
ENTER Holds reading, enters selection, moves down within menu structure
7 INPUT CONNECTIONS
INPUT HI and LO Used for making DC volts, AC volts, and 2-wire resistance
measurements
AMPS Used in conjunction with INPUT LO to make DC current
and AC current measurements. Also holds current input fuse
(2A, 250V, fast blow, 5×20mm)
SENSE Ω4 WIRE HI and LO Used with INPUT HI and LO to make 4-wire resistance
measurements
8 INPUTS Selects input connections on front or rear panel
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
1-6 Front Panel Operation
Figure 3
Model 2002
rear panel
overview
123
INPUT
EXTERNAL
1100V
!
HI LO
PEAK
350V
PEAK
SENSE
Ω 4 WIRE
5
500V
PEAK
OPTION SLOT
AMPS
2A MAX
AMPS
FUSE
2A, 250V
TRIGGER
67
EXTERNAL TRIGGER INPUT
Trigger Reading
>10µsec
INPUT
MADE IN
U.S.A.
METER
COMPLETE
OUTPUT
DIGITAL I/O
TTL HI
TTL LO
LINE RATING
90-134VAC
180-250VAC
50, 60, 400HZ
55VA MAX
IEEE-488
(CHANGE IEEE ADDRESS
IN OUT
TRIGGER
LINK
8
WITH FRONT PANEL MENU)
9
METER COMPLETE OUTPUT
Reading
Complete
TTL HI
>10µsec
TTL LO
LINE FUSE
SLOWBLOW
1/2A, 250V
4
BNC CONNECTIONS
HI
LO (Chassis)
Front Panel Operation 1-7
1 INPUT CONNECTIONS
INPUT HI and LO Used for DC volts, AC volts, and 2-wire resistance measure-
ments
AMPS Used with INPUT LO to make DC current and AC current
measurements
SENSE Ω4 WIRE HI and LO Used with INPUT HI and LO to make 4-wire resistance
measurements
2 FAN Keep filter clean to ensure proper instrument cooling
3 POWER LINE INPUT
90–134VAC and 180–250VAC (universal); 50, 60, or 400Hz (self-identifying at power-up)
WARNING: Connect to grounded outlet using 3-wire power cord
4 LINE FUSE 0.5A, 250V, slow blow, 5×20mm
5 OPTION SLOT An option card installs in this slot
6 AMPS FUSE 2A, 250V, fast blow, 5×20mm
7 DIGITAL I/O A DB-9 connector for the TTL-compatible digital I/O with one input and
four outputs
8 TRIGGER LINK IN and OUT Two 8-pin micro DIN connectors for sending and receiv-
ing trigger pulses among other instruments
9 IEEE-488 CONNECTOR Connects the instrument to the IEEE-488 (GPIB) bus
NOTE: Use shielded IEEE-488 cables
1-8 Front Panel Operation
Display
As shown in the Model 2002 front panel overview (Figure 2), the front panel has three lines
of display information: the primary display line, the secondary display line, and annunciators.
• Primary Display Line: The top line displays readings along with units. It can also display
measurement type (e.g., RMS), “hold”, math operating type, channel number, menu
headings and messages. Error and status messages are listed in Section 2 of the User’s
Manual.
• Secondary Display Line: The bottom line displays the range, other measurement parameters (e.g., coupling or ratio), menu items, messages and multiple displays (see MEASUREMENT OPTIONS section of this manual). Longer text strings are indicated by
arrows on either end of the display line. Use the cursor ke ys ( and ) to display the
additional information.
Power-up
Warm-up
Note that in certain situations, displayed readings may be expressed in scientific notation. For
example, a reading of +1.0000e-03VDC is interpreted as 1mVDC.
Warning Before turning on the Model 2002, make sure it is connected to a grounded
power receptacle using the supplied power cord or the equivalent. Failure to
properly ground the unit creates a shock hazard that could result in injury
or death.
Use the front panel POWER switch to turn power on and off.
During power-up, the Model 2002 performs self-tests on its memory elements. If a f ailure occurs, the instrument momentarily displays an error message and turns on the ERR annunciator.
If the instrument passes the self-tests, the firmware revision le vels, memory option (if installed),
and IEEE-488 address are displayed.
For complete information on the power-up sequence, see Section 2 in the User’s Manual.
The instrument is ready for use as soon as the power-up sequence is completed. However, to
achieve rated accuracy, allow the instrument to warm up for four hours. If the instrument has
been subjected to extreme temperatures, allow additional time to allo w internal temperatures to
stabilize.
Bench defaults
The Model 2002 can save one, five, or ten user setups in non-v olatile memory, depending on
the installed memory option. You can select one of the user setups as the power-on default, or
have the instrument power up to either of the two factory defaults (optimized for “BENCH” or
“GPIB” operation).
Since the basic measurement procedures in this manual assume the BENCH defaults, reset
the instrument from the SAVESETUP item of the MAIN MENU by performing the following
steps:
1. Press the MENU key to display the main menu:
MAIN MENU
SAVESETUP GPIB CALIBRATION
2. If the SAVESETUP option is not blinking, press the key until it is blinking and then
press ENTER to view the setup menu:
SETUP MENU
SAVE RESTORE POWERON RESET
3. Select the RESET option and press ENTER to view the reset menu:
RESET ORIGINAL DFLTS
BENCH GPIB
4. Select the BENCH option and press ENTER. The following message is displayed:
RESETTING INSTRUMENT
Enter to confirm; EXIT to abort
5. Press ENTER to confirm. The display will show DC voltage readings with auto-range
enabled.
TEST LIMITS STATUS-MSG GENERAL
Front Panel Operation 1-9
Other BENCH default settings for DCV include:
• Triggers — Continuous measurements.
• Measurement speed (integration time) — Normal, 1 power line cycle.
• Digital filter — Advanced, 10 readings, 1% noise tolerance, moving average, enabled.
• Display resolution — 7.5 digits.
Note: See MENUS in the MEASUREMENT OPTIONS section of this manual for details on
navigating the Main Menu.
1-10 Front Panel Operation
Voltage measurements
Assuming “BENCH” reset conditions, the basic procedure is as follows:
1. Connect test leads to the INPUT HI and LO terminals. Either the front or rear inputs can
be used; place the INPUTS button in the appropriate position.
2. Select the measurement function by pressing DCV or ACV.
3. The AUTO annunciator indicates that autoranging is enabled. If you want manual ranging, use the RANGE
expected voltage.
4. Connect test leads to the source as shown in Figure 4.
CAUTION Do not apply more than 1100V peak or 2
ment damage may occur.
▲
and ▼ keys to select a measurement range consistent with the
7
×
10
V•Hz to the input, or instru-
5. Observe the display. If the “Overflow” message is displayed, select a higher range until
6. Take a reading from the display.
Figure 4
DC and AC
voltage measurements
a normal reading is displayed. Use the lowest possible range for the best resolution.
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
1234567891012345678910
2001 MULTIMETER
Input Resistance = 10MΩ on 1000V and 200V ranges.
> 100GΩ on 20V, 2V and 200mV ranges.
= 1MΩ on DCV peak spikes measurement.
Caution : Maximum Input = 1100V peak
DC Voltage
Source
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
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2001 MULTIMETER
AC Voltage
Source
Input Impedence = 1MΩ shunted by <140pF
Caution: Maximum Input = 1100V peak, 2 x 107 V•Hz
Current measurements
Assuming “BENCH” reset conditions, the basic procedure is as follows:
1. Connect test leads to the AMPS and INPUT LO terminals. Either the front or rear inputs
can be used; place the INPUTS button in the appropriate position.
2. Select the measurement function by pressing DCI or ACI.
3. The AUTO annunciator indicates that autoranging is enabled. If you want manual ranging, use the RANGE
expected current.
4. Connect test leads to the source as shown in Figure 5.
CAUTION Do not apply more than 2.1A, 250V to the input, or the amps fuse will blow.
5. Observe the display. If the “Overflow” message is displayed, select a higher range until
a normal reading is displayed. Use the lowest possible range for the best resolution.
6. Take the reading from the display.
▲
Front Panel Operation 1-11
and ▼ keys to select a measurement range consistent with the
Figure 5
DC and AC
current measurements
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
1234567891012345678910
2001 MULTIMETER
Caution: Maximum Input = 2.1A
Current
Source
1-12 Front Panel Operation
Two and four-wire resistance measurements
Assuming “BENCH” reset conditions, the basic procedure is as follows:
1. Connect test leads to the Model 2002 as follows:
A. For 2-wire, connect the test leads to INPUT HI and LO.
B. For 4-wire, connect the test leads to INPUT HI and LO, and SENSE
and LO. Recommended Kelvin test probes include the Keithley Models 5805 and
5806.
Either the front or rear inputs can be used; place the INPUTS button in the appropriate
position.
2. Select the measurement function by pressing
3. The AUTO annunciator indicates that autoranging is enabled. If you want manual ranging, use the RANGE
expected resistance.
4. Connect test leads to the resistance as shown in Figure 6.
and ▼ keys to select a measurement range consistent with the
2 or Ω 4.
Ω
Ω
4 WIRE HI
▲
CAUTION Do not apply more than 1100V peak between INPUT HI and LO, or instru-
Shielding
tance in a shielded enclosure and electrically connect the shield to the INPUT LO terminal of
the instrument.
ment damage may occur.
5. Observe the display. If the “Overflow” message is displayed, select a higher range until
a normal reading is displayed. Use the lowest possible range for the best resolution.
6. Take a reading from the display.
It helps to shield resistances greater than 100k Ω to achieve a stable reading. Place the resis-
Front Panel Operation 1-13
Figure 6
Two and fourwire resistance
measurements
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
1234567891012345678910
2001 MULTIMETER
Shielded
Cable
Note: Source current flows from the INPUT
HI to INPUT LO terminals.
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
1234567891012345678910
2001 MULTIMETER
Shielded
Cable
Note: Source current flows from the INPUT HI
to INPUT LO terminals.
Optional shield
Resistance
Under Test
Optional shield
Resistance
Under Test
1-14 Front Panel Operation
Frequency measurements
The Model 2002 can make frequency measurements from 1Hz to 15MHz through its INPUT
HI and INPUT LO terminals, and from 1Hz to 1MHz through its AMPS and INPUT LO terminals. Assuming “BENCH” reset conditions, the basic procedure is as follows:
1. Connect test leads to the INPUT HI and LO terminals of the Model 2002. Either the front
or rear inputs can be used; place the INPUTS button in the appropriate position.
NOTE A bench reset defaults the frequency input terminals to INPUT HI and LO.
2. Select the FREQ function.
3. Connect test leads to the source as shown in Figure 7 (top).
CAUTION Do not exceed 1100V peak between INPUT HI and INPUT LO, or instru-
ment damage may occur.
4. Take a reading from the display.
The procedure for measuring frequency with the AMPS and INPUT LO terminals is similar.
However, the FREQ function has to be configured to use the current terminals (the connection
diagram is shown in Figure 7 (lower)). Perform the following steps to select the AMPS and INPUT LO terminals:
1. Press the CONFIG key and then the FREQ key.
2. Using the cursor keys ( and ), place the cursor on INPUT-TERMIN ALS and press
ENTER.
3. Place the cursor on CURRENT and press ENTER.
4. Use the EXIT key to back out of the menu structure.
CAUTION Do not apply more than 2.1A, 250V to the AMPS input, or the amps protec-
tion fuse will blow.
Front Panel Operation 1-15
Figure 7
Frequency measurements
AC voltage input
AC current input
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
1234567891012345678910
2001 MULTIMETER
Caution: Maximum Input = 1100V peak, 2 x 107 V•Hz
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
1234567891012345678910
2001 MULTIMETER
Caution: Maximum Input = 1A peak
AC Voltage
Source
AC Current
Source
Trigger level
An appropriate trigger level is needed for the frequency counter to operate properly. The instrument only counts cycles with peak amplitudes that reach the trigger level. For example, if
the trigger level is set for 5V, cycles with peak amplitudes less than 5V are not counted.
Use the RANGE ▲ and ▼ keys to check and/or change the trigger level. The AUTO range
key returns the trigger level or 0V or 0mA.
1-16 Front Panel Operation
Temperature measurements
The Model 2002 measures temperature with two different sensor types: RTDs and thermo-
couples. With RTDs, the Model 2002 can measure temperature between -200°C and +630°C.
RTDs can be connected to the input terminals or the optional Model 2001-SCAN scanner card.
With thermocouples connected to the Model 2001-TCSCAN card or an external thermocouple card, such as a Model 7057A or 7402 in a Model 7001 or 7002 Switch System, the instrument measures temperature over a range that is dependent on the thermocouple type.
Assuming “BENCH’ reset conditions, the basic procedure to measure temperature with a
type PT100 4-wire RTD (the default sensor) is as follows:
1. Connect the RTD sensor to the Model 2002 as shown in Figure 8. You can use banana
plugs (with the front or rear inputs), or the optional Model 8680 RTD Probe Adapter
(with the front inputs). Place the INPUTS button in the appropriate position RTDs can
also be connected to the optional Model 2001-SCAN scanner card.
2. Select the TEMP function.
CAUTION Do not exceed 1100V peak between INPT HI and LO, or 350V peak between
SENSE Ω4 WIRE HI and LO, or instrument damage may occur.
3. Observe the display . If the “Overflo w” message is shown, the R TD might not be connected properly.
4. Take a reading from the display.
The procedure for measuring temperature with 3-wire and 2-wire R TDs is similar and is co v-
ered in Section 2 of the User’s Manual.
To measure temperature with thermocouples, you need to connect the thermocouples to a
suitable scanner card, such as the Model 2001-TCSCAN or an external card (Model 7057A or
7402). The thermocouple cards use channel 1 as the reference junction and must be configured
on the Model 2002 for TC type, voltage reference and of fset. See Section 2 in the User’ s Manual
for configuration details.
Front Panel Operation 1-17
Figure 8
Four-wire RTD temperature
measurements
Connections to banana jacks
Connections to circular jack
Sense Ω4-wire HI
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
1234567891012345678910
2001 MULTIMETER
Input HI
Platinum
RTD
Input LO
Sense Ω4-wire LO
Model 8680 RTD
Probe Adapter
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
1234567891012345678910
2001 MULTIMETER
2
Sense Ω4-wire HI
4
Input HI
1
3
Sense Ω4-wire LO
Sense Ω4-wire HI
Input HI
Platinum
Input LO
RTD
Sense Ω4-wire LO
Input LO
WARNING : To avoid a shock hazard and possible instrument damage,
do not use the Model 8680 RTD Probe Adapter to measure voltages
exceeding 30V RMS, 42.4V peak.
Connections to terminal block
Model 8680 RTD
Probe Adapter
Model 2002
EDIT ERR REM TALK LSTNSRQ REAR REL FILTMATH 4W AUTO ARM TRIG SMPL
1234567891012345678910
Sense Ω4-wire HI
Input HI
2001 MULTIMETER
1 234
Sense Ω4-wire LO
Input LO
Sense Ω4-wire HI
Input HI
Platinum
RTD
Input LO
Sense Ω4-wire LO
2
Measurement
Options
2-2 Measurement Options
This section describes the details of making measurements. Configuration options, triggers,
reading storage, and scanning are just a few of the topics discussed. You will find this information useful whether operating the Model 2002 from the front panel or IEEE-488 bus.
Multiple displays
Each measurement function and some operations provide “multiple displays” by using the
bottom line of the front panel. These multiple displays provide multiple type measurements,
show a reading in a different form, or give additional information about the reading.
A few of the frequently used multiple displays are summarized in this section. All the multiple displays are shown in Table 1.
The NEXT and PREV (previous) DISPLAY keys scroll through the multiple displays for the
selected function or operation. The multiple display mode can be cancelled by pressing and
holding in either key.
Measurement Options 2-3
Table 1
Multiple displays by function
Function Next display
All
Bar graph
Zero-centered bar graph
Maximum and minimum values
Relative and actual values
Calculated and actual values (see Note 1)
Limts bar graph (see Note 1)
Adjacent channel readings (see Note 2)
DC voltage
DC volts, AC ripple voltage and frequency
Positive peak spikes and highest value
Negative peak spikes and lowest value
Positive and negative peak spikes
AC voltage
AC RMS voltage, frequency, and crest factor
AC RMS, average, and peak voltages
DC current
AC current
(none specific to function)
AC RMS (or average) current and frequency
AC RMS and average current
2-wire resistance
Source current
Voltage drop across DUT
4-wire resistance
Source current
Voltage drop across DUT
Lead resistance
Frequency
Period calculation
Trigger level
Temperature
Celsius, Fahrenheit, and Kelvin units
RTD resistance (or thermocouple voltage)
Reference junction (thermocouples only)
Data storage buffer
Maximum and minimum values
Average and standard deviation
Notes:
1. Multiple displays for calculated values and limits bar graph are not available for the fre-
quency function.
2. The multiple display for adjacent channel readings is not available for the DC and AC
current functions.
2-4 Measurement Options
FILT 4W ARM
FILT 4W ARM
FILT 4W ARM
FILT ARM
2002 MULTIMETER
2002 MULTIMETER
2002 MULTIMETER
2002 MULTIMETER
Bar Graph — The bar graph is a graphical representation of the reading with zero at the left end. Each full
segment of the bar represents approximately 4% of the
range limit.
Zero-centered Bar Graph — The zero-centered bar
graph is a graphical representation of the reading using
plus minus limits with zero in the center . Each full se gment represents 10% of the limit.
Maximum and Minimum — This display shows
the maximum and minimum readings that have occurred since the display was entered. Maximum and
minimum values are reset by pressing the present function key or by leaving the display.
Relative and Actual — This display is used with
the rel (relative) feature. While the top line shows the
result of the rel operation, the bottom line shows the actual (raw) reading.
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