Page 1
Fluke 45
Bench Multimeters
45 Dual Display Multimeter
Multifunction Vacuum Fluorescent Dual Display
True-RMS Voltage and Current, Including ac + dc
RS-232C Interface Standard, GPIB/IEEE-488.2 Optional
Frequency Measurement to 1 MHz
dB Measurements with Selectable Reference Impedances
of 2V to 8000V and Audio Power from 2V to 16V
Compare (Hi/Lo/Pass) Function for
Quick In-Tolerance Tests
0.05% dc Current Accuracy for 4-20 mA Current Loop Service
Touch Hold, Relative and Min Max
Audible Continuity and Diode Test
Optional Rechargeable Battery, Carrying Case, Rack Mount Kit & PC Software Package
Closed-Case Calibration
The Fluke 45 is a feature-rich 5 digit,
100,000 count DMM with a unique multifunction dual display, allowing measurement of two signal parameters from a
single test connection. The Fluke 45 offers
high performance and versatility for manufacturing test, depot and field service, and
research and development. A standard
RS-232C makes it ideal for PC instrument
applications.
Dual Display
The Fluke 45 is the first DMM with a
multifunction ‘‘dual display,’’ allowing the
user to select a wide variety of measurement combinations. It is particularly useful
in applications requiring two different
measurements of the same signal; i.e.
power supply testing, where Vdc output
can be viewed on the primary display
while the Vac ripple is shown on the
secondary display.
Standard RS-232C Interface
The RS-232C interface, standard in each
instrument, allows measurement data to
be filed, manipulated, printed or transmitted by modem. The print mode automatically formats measurement data for
printing on an RS-232C printer. Rates for
automated printing over RS-232C are
adjustable from 1 reading every 70 ms to
1 reading every 5.6 hours. The optional
QuickStart 45
automated communications and filing of
measurements with the Fluke 45 and an
IBM-PC or compatible via RS-232C.
TM
Software Package allows
dB Measurement
The Fluke 45 provides digital readout of
decibels with front panel selection of any
of twenty-one reference impedances from
2V to 8000V. For 2V, 4V, 8V and 16V
impedances, the meter automatically
calculates and displays audio power
in watts.
Compare Function
The Fluke 45 has a compare function for
fast in-tolerance limits testing. Upper- and
lower-limits are entered through the front
panel. Readouts show both a Hi/Lo/Pass
evaluation and measured value.
Touch Hold Relative and
Min/Max
Touch Hold captures the measurement,
beeps and locks it on the digital display
until you are ready to view it. It automatically updates with each new stable
measurement. The Relative mode remembers a reading and shows the change
(difference) between it and any readings
that follow. Min/Max records the highest
and lowest values measured. Either can be
recalled and displayed at any time.
Optional Battery and Case
An optional rechargeable battery and soft
carrying case are available for precision
field service applications. These options,
coupled with a 30 mA dc current range
and 0.05% accuracy, allow calibration of
4-20 mA loops in process control applications. The battery is available as a factory
installed option or can be user-installed at
a later date.
Optional GPIB/IEEE-488.2
and Rack Mount
The Fluke 45 may be used with GPIB/IEEE-
488.2 systems, including existing IEEE488 implementations. The IEEE- 488.2
option is available as a factory installed
option, or can be user installed and does
not require removal of the RS-232C interface. A rack mount kit is also available.
Closed-Case Calibration
Calibration can be performed via the
RS-232C (or optional IEEE-488.2) interface or manually from the front panel.
No internal adjustments are required.
Standard Equipment
Each Fluke 45 Dual Display Multimeter
includes an operator’s manual, quick
reference guide, line cord, and test leads.
Specifications
Technical Specifications
Accuracy specifications are given as ±
([% of reading] + [number of least significant digits]) at 18°C to 28°C with relative
humidity up to 90%, for a period of one
year after calibration. Six months specifications are also provided for dc volts. AC
inputs are ac-coupled and True-RMS
responding.
Display
Dual vacuum fluorescent displays, 99,999
counts each display. Annunciators: m, M,
k, V, A, V (ohms), Hz, ? + diode test,
(audible continuity), REMOTE, EXT TRIG,
SMF (reading rates), MAX, MIN, dB, HOLD,
REL, AUTO, – + (low battery). Resolution
and accuracy are dependent on selectable
reading rates of 2.5 (slow), 5 (medium) or
20 (fast) readings per second.
Rate Readings
Slow 2.5 99,999
Medium 5 30,000
Fast 20 3000
Per Second
Full Range
Display Counts
Page 2
Bench Multimeters
45 Dual Display Multimeter
RS-232C and IEEE-488
Reading Transfer Rates
Internal Trigger Operation (TRIGGER 1)
Rate Readings Per Second
Slow 2.5
Medium 4.5
Fast 4.5
External Trigger Operation (TRIGGER 4)
Rate Readings Per Second
Slow 1.5
Medium 2.4
Fast 3.8
Print Mode Operation (Print set at 1)
Rate Readings Per Second
Slow 2.5
Medium 5.0
Fast 13.5
Maximum Input: To be used in protected,
low-energy circuits only, not to exceed
250V or 4800 volt-amps
mA: 300 mA dc or ac rms. Protected
with a 500 mA, 250V, IEC 127 sheet 1
fast blow fuse
A: 10A dc or ac rms continuous or 20A
dc or ac rms for 30 seconds maximum.
Protected with a 15A, 250V, 10,000A
interrupt rating fast blow fuse.
Diode Test/Continuity
Accuracy
Slow 999,99 mV 10 mV
Medium 2.5V 100 mV
Fast 2.5V 1 mV
Test Current: Approximately 0.7 mA
when measuring forward bias junction
Audible Tone: Continuous tone for continuity. Brief tone for normal forward biased
diode or semiconductor junction
Open Circuit Voltage: 3.2V maximum
Continuity Capture Time: 50 ms maxi-
mum, 10 ms typical
Input Protection: 500V dc or ac rms
Maximum
Reading
Resolution
DC Voltage
Range
300 mV — 10 mV 100 mV
3V — 100 mV1mV
30V — 1 mV 10 mV 0.02% + 2 0.025% + 2
300V — 10 mV 100 mV
1000V — 100 mV 1V
100 mV 1 mV— —
1000 mV 10 mV— —
10V 100 mV — — 0.02%+ 6 0.025% + 6
100V 1 mV — —
1000V 10 mV — —
Resolution
Slow Medium Fast
Input Impedance: 10 MV in parallel with <100 pF
Normal Mode Rejection Ratio: >80 dB at 50 or 60 Hz, slow and medium rates; >54 dB
for frequencies between 50 and 440 Hz, slow and medium rates; >60 dB at 50 Hz, fast
rate
Common Mode Rejection Ratio: >90 dB at dc, 50 or 60 Hz (1 kV unbalanced, slow &
medium rates)
Maximum Input: 1000V dc or peak ac on any range
Accuracy (6 Month) Accuracy (1 Year)
AC Voltage (True-RMS, ac coupled)
Range
300 mV — 10 mV 100 mV 100 mV 1 mV— —
3V — 100 mV 1 mV 1000 mV 10 mV— —
30V — 1 mV 10 mV 10V 100 mV— —
300V — 10 mV 100 mV 100V 1 mV — —
750V — 100 mV 1V 750V 10 mV — —
Slow/Medium Fast
0.01 dB 0.1 dB
Frequency
20-50 Hz 1%+100 1%+10 7%+2 0.15 0.72 2%+10 750V
50 Hz-10 kHz 0.2%+100 0.2%+10 0.5%+2 0.08 0.17 0.4%+10 750V
10-20 kHz 0.5%+100 0.5%+10 0.5%+2 0.11 0.17 1%+10 750V
20-50 kHz 2%+200 2%+20 2%+3 0.29 0.34 4%+20 400V
50-100 kHz 5%+500 5%+50 5%+6 0.70 0.78 10%+50 200V
*Error in power mode will not exceed twice the linear accuracy specification
Linear Resolution Linear Resolutions
Slow Medium Fast Slow Medium Fast
Decibels Resolution
Linear Accuracy dB Accuracy
Slow Medium Fast Slow/Med Fast
Accuracy specifications apply within the following limits, based on reading rate:
Slow: Between 15,000 counts and full range
Medium: Between 1,500 counts and full range
Fast: Between 150 counts and full range
Input Impedance: 1MVin parallel with <100 pF
Maximum Crest Factor: 3.0
Common Mode Rejection Ratio: >60 dB at 50 or 60 Hz (1 kV unbalanced medium rate)
Maximum Input: 750V rms, 1000V peak
7
volt-hertz product on any range, normal mode input
2 × 10
1 × 106volt-hertz product on any range, common mode input
Range
Power*
Max Input
Upper Freq
AC + DC Voltage (calculated)
Total measurement error will not exceed the sum of the separate ac and dc accuracy
specifications, plus one display count.
Page 3
Bench Multimeters
45 Dual Display Multimeter
Ohms
Range
300V — 10 mV 100 mV 0.05% + 2 + 0.02V 0.25 1 mA
3kV — 100 mV 1V 0.05% + 2 0.24 120 mA
30 kV —1V10V 0.05% + 2 0.29 14 mA
300 kV —10V100V 0.05% + 2 0.29 1.5 mA
3MV — 100V 1kV 0.06% + 2 0.30 150 nA
30 MV —1kV10 kV 0.25% + 3 2.25 320 nA
300 MV — 100 kV 1MV 2% 2.90 320 nA
100V 1mV — — 0.05% + 8 + 0.02V 0.09 1 mA
1000V 10 mV — — 0.05% + 8 + 0.02V 0.10 120 mA
10 kV 100 mV — — 0.05% + 8 0.11 14 mA
100 kV 1V — — 0.05% + 8 0.11 1.5 mA
1000 kV 10V — — 0.06% + 8 0.12 150 nA
10 MV 100V — — 0.25% + 6 1.50 150 nA
100 MV 100 kV — — 2% + 2 2.75 320 nA
Resolution
Slow Medium Fast
Accuracy
Typical Full
Scale Voltage
Open Circuit Voltage: 3.2V max on 100V, 300V, 30 MV, 100 MV & 300 MV ranges;
1.5V max on all other ranges
Input Protection: 500V dc or ac rms on all ranges
Max Current
Thru
Unknown
DC Current
Range
30 mA — 1 mA 10 mA 0.05% + 3 0.45V
100 mA — 10 mA 100 mA 0.05% + 2 1.4V
10A — 1 mA 10 mA 0.2% + 5 0.25V
10 mA 100 nA — — 0.05% + 20 0.14V
100 mA 1 mA — — 0.05% + 5 1.4V
10A 100 mA — — 0.2% + 7 0.25V
Slow Medium Fast
Resolution
Accuracy
Maximum Crest Factor: 30
Maximum Input: To be used in protected, low-energy circuits only, not to exceed 250V
or 4800 volt-amps
mA: 300 mA dc or ac rms. Protected with a 500 mA, 250V, IEC 127 sheet 1 fast blow
fuse.
A: 10A dc or ac rms continuous or 20A dc or ac rms for 30 seconds maximum. Protected
with a 15A, 250V, 10,000A interrupt rating fast blow fuse.
Typical Full Scale
Burden Voltage
AC Current (True-RMS, ac coupled)
Range
10 mA 100 nA — — 0.14V
30 mA — 1 mA 10 mA 0.45V
100 mA 1 mA 10 mA 100 mA 1.4V
10A 100 mA 1 mA 10 mA 0.25V
Range Frequency
mA 20-50 Hz 2% + 100 2% + 10 7% + 2
mA 50 Hz-10 kHz 0.5% + 100 0.5% + 10 0.8% + 2
mA 10-20 kHz 2% + 200 2% + 20 2% + 3
A (1A to 10A) 20-50 Hz 2% + 100 2% + 10 7% + 2
A (1A to 10A) 50 Hz-2 kHz 1% + 100 1% + 10 1.3% + 2
A (0.5A to 1A) 20-50 Hz 2% + 300 2% + 30 7% + 4
A (0.5A to 1A) 50 Hz-2 kHz 1% + 300 1% + 30 1.3% + 4
Slow Medium Fast
Resolution
Accuracy
Slow Medium Fast
Accuracy specifications apply within the following limits, based on reading rate:
Slow: Between 15,000 counts and full range; Medium: Between 1,500 counts and
full range; Fast: Between 150 counts and full range
Maximum Crest Factor: 3.0
Maximum Input: To be used in protected, low-energy circuits only, not to exceed 250V
or 4800 volt-amps
mA: 300 mA dc or ac rms. Protected with a 500 mA, 250V, IEC 127 sheet 1 fast blow
fuse.
A: 10A dc or ac rms continuous or 20A dc or ac rms for 30 seconds maximum. Protect-
ed with a 15A, 250V, 10,000A interrupt rating fast blow fuse.
Typical Full Scale
Burden Voltage
Frequency
Frequency Range: 5 Hz to >1 MHz
Accuracy: 0.05% + 1, except 1000 Hz
range, 0.05% + 2
Range
1000 Hz 10 mHz 100 mHz
10 kHz 100 mHz 1 Hz
100 kHz 1 Hz 10 Hz
1000 kHz 10 Hz 100 Hz
1 MHz* 100 Hz 1 kHz
* Specified to 1 MHz, usable to 8 MHz when
overdriven
Frequency Level
5 Hz-100 kHz 30 mV rms sinewave
100 kHz-300 kHz 100 mV rms sinewave
300 kHz-1 MHz 1V rms sinewave
Above 1 MHz Not specified
Frequency Input Level
5 Hz-20 kHz 100 mA > 3 mA rms sinewave
45 Hz-2 kHz 10A > 3A rms sinewave
Slow/Medium Fast
Sensitivity of AC Voltage
Sensitivity Level of AC Current
Resolution
General Specifications
Power Requirements
Power: 90 to 264V ac (no switching
required), 50 and 60 Hz <15 VA minimum
Environmental Data
Maximum Common Mode Voltage:
1000V dc or peak ac from any input to
earth
Warmup Time: 1 hour to rated
specifications
Temperature Coefficient: <0.1 times the
applicable accuracy specifications per
degree C from 0°C to 18°C and from 28°C
to 50°C, (32°F to 64.4°F and 82.4°F to
122°F)
Operating Temperature: 0°C to 50°C
(32°F to 122°F)
Storage Temperature: −40°C to 70°C
(−40°F to 158°F). Elevated temperature
storage of battery will accelerate battery
self-discharge. Maximum storage time
before battery must be recharged:
20°C to 25°C 1000 days
50°C 180 days
70°C 40 days
Relative Humidity (non-condensing): Up
to 90%, 0°C to 28°C (32°F to 82.4°F); up to
80%, 28°C to 35°C (82.4 °F to 95°F); up to
70%, 35°C to 50°C (95°F to 122°F), except
70%, 0°C to 50°C (32°F to 122°F) for the
1MV, 3 MV, 10 MV, 30 MV, 100 MV and
300 MV ranges.
Altitude: Operating, 0 to 10,000 feet;
non-operating, 0 to 40,000 feet
Vibration: 3G @ 55 Hz per MIL-T-28800D,
Class 3, Style E
Shock: Half-sine 40G per MIL-T-28800D,
Class 3, Style E. Bench handling.
Loading...