Fluke Wireless Office Headset 3458 HFL User Manual

Multimeter Selection Guide  
Fluke 8508A & Agilent 3458/HFL  
TECHNICAL INFORMATION  
When comparing two products features and specification using sales information  
it is often difficult to determine which product will meet the needs of your specific  
application. This is mostly because each supplier will define specifications using  
alternate methods. This Selection Guide will help you compare the specifications  
and features of the Fluke 8508A Reference multimeter with the nearest  
equivalent digital multimeter the Agilent 3458/HFL. Both the 8508A and the  
special 3458/HFL multimeters are available through the Fluke sales channel.  
The following pages summarize & segment the features of each meter into the  
following three categories.  
Accuracy  
Functionality & Versatility  
Ease of Use  
The 'Comments' column found in the following table provides a brief explanation  
against each feature and its relevance to the intended metrology applications.  
Further reference information:  
1) Agilent 3458A/HFL Technical Data - 1275558 D-ENG-N  
2) Fluke 8508A Extended Specifications - 1887212 D-ENG-N rev A  
3) 1281Operators Handbook – 850090 issue 6  
 
DC Current ±(ppm of setting + ppm of range), relative to calibration standards used.  
Calibration Interval 365 day, ±1°C of last TCAL  
Range  
1281  
HP3458/HFL  
8508A  
120.000nA  
-
30 + 400  
-
1.200000µA  
12.000000µA  
120.00000µA  
199.99999µA  
1.2000000mA  
1.9999999mA  
12.000000mA  
19.999999mA  
120.00000mA  
199.99999mA  
1.0500000A  
1.9999999A  
19.999999A  
-
-
-
20 + 40  
20 + 10  
20 + 8  
-
-
-
25 + 2  
-
6.5 + 2.0  
-
20 + 5  
-
25 + 2  
-
6.5 + 2.0  
-
8.0 + 2.0  
-
33 + 4.0  
-
170 + 8.0  
380 + 20  
-
20 + 5  
25 + 2  
-
-
35 + 5  
50 + 5  
-
-
110 + 10  
150 + 10  
-
-
-
 
Resistance ±(ppm of setting + ppm of range), relative to calibration standards used.  
Calibration Interval 365 day, ±1°C of last TCAL  
Range  
1281  
HP3458/HFL  
8508A  
1.99999999 Ohm  
12.00000 Ohm  
-
-
10 + 2.0  
-
10 + 5  
-
8 + 5  
-
19.9999999 Ohm  
120.00000 Ohm  
12 + 1.0  
7.0 + 0.7  
-
-
199.999999 Ohm  
1.2000000 kOhm  
1.99999999 kOhm  
12.000000 kOhm  
19.9999999 kOhm  
120.00000 kOhm  
199.999999 kOhm  
1.2000000 MOhm  
1.99999999 MOhm  
12.000000 MOhm  
19.9999999 MOhm  
120.00000 MOhm  
199.999999 MOhm  
1.2000000 GOhm  
1.99999999 GOhm  
8 + 0.3  
7.0 + 0.25  
-
7.5 + 0.5  
-
6 + 0.3  
-
7.0 + 0.25  
-
7.5 + 0.5  
-
6 + 0.3  
-
7.0 + 0.25  
-
7.5 + 0.5  
-
6 + 0.3  
-
7.0 + 0.25  
-
15 + 2  
-
10 + 0.7  
-
7.0 + 0.5  
-
50 + 10  
-
20 + 4.0  
-
9.0 + 5.0  
-
500 + 10  
-
30 + 50  
-
200 + 45  
-
2000 + 450  
-
5000 + 10  
-
500 + 500  
 
AC Current ±(ppm of setting + ppm of range), relative to calibration standards used.  
Calibration Interval 365 day, ±1°C of last TCAL  
Range  
Frequency  
1281  
HP3458/HFL  
8508A  
120.0000µA  
10Hz - 20Hz  
20Hz - 45Hz  
45Hz - 100Hz  
100Hz - 5kHz  
1Hz - 10Hz  
-
4000 + 200  
-
-
-
-
-
1500 + 200  
600 + 200  
600 + 200  
-
-
-
199.9999µA  
-
250 + 100  
10Hz - 5kHz  
10Hz - 10kHz  
10kHz - 30kHz  
30kHz - 100kHz  
10Hz - 20Hz  
20Hz - 45Hz  
45Hz - 100Hz  
100Hz - 5kHz  
5kHz - 20kHz  
20kHz - 50kHz  
50kHz - 100kHz  
1Hz - 10Hz  
10Hz - 5kHz  
10Hz - 10kHz  
10kHz - 30kHz  
30kHz - 100kHz  
10Hz - 20Hz  
20Hz - 45Hz  
45Hz - 100Hz  
100Hz - 5kHz  
5kHz - 20kHz  
20kHz - 50kHz  
50kHz - 100kHz  
1Hz - 10Hz  
10Hz - 5kHz  
10Hz - 10kHz  
10kHz - 30kHz  
30kHz - 100kHz  
10Hz - 20Hz  
20Hz - 45Hz  
45Hz - 100Hz  
100Hz - 5kHz  
5kHz - 20kHz  
20kHz - 50kHz  
50kHz - 100kHz  
1Hz - 10Hz  
10Hz - 5kHz  
10Hz - 10kHz  
10kHz - 30kHz  
10Hz - 20Hz  
20Hz - 45Hz  
45Hz - 100Hz  
100Hz - 5kHz  
5kHz - 20kHz  
20kHz - 50kHz  
10Hz - 1kHz  
10Hz - 2kHz  
1kHz - 5kHz  
2kHz - 10kHz  
10kHz - 30kHz  
10Hz - 2kHz  
2kHz - 10kHz  
200 + 200  
-
-
-
-
-
-
-
-
-
-
-
-
-
250 + 100  
600 + 100  
4000 + 100  
1.2000000mA  
4000 + 200  
1500 + 200  
600 + 200  
300 + 200  
600 + 200  
4000 + 400  
5500 + 1500  
-
-
-
-
-
-
-
-
-
-
1.999999mA  
12.00000mA  
-
-
-
-
250 + 100  
200 + 100  
-
-
-
-
-
-
-
-
-
250 + 100  
600 + 100  
4000 + 100  
-
4000 + 200  
1500 + 200  
600 + 200  
300 + 200  
600 + 200  
4000 + 400  
5500 + 1500  
-
-
-
-
-
-
-
-
-
-
19.99999mA  
120.0000mA  
-
-
-
-
250 + 100  
200 + 100  
-
-
-
-
-
-
-
-
-
250 + 100  
600 + 100  
4000 + 100  
-
4000 + 200  
1500 + 200  
600 + 200  
300 + 200  
600 + 200  
4000 + 400  
5500 + 1500  
-
-
-
-
-
-
-
-
-
-
199.9999mA  
1.050000A  
-
-
-
-
250 + 100  
200 + 100  
-
-
-
-
-
-
-
-
-
250 + 100  
600 + 100  
4000 + 200  
1600 + 200  
800 + 200  
1000 + 200  
3000 + 200  
10000 + 400  
-
-
-
-
-
-
-
1.999999A  
19.99999A  
500 + 200  
-
-
-
-
-
-
-
-
600 + 100  
-
700 + 100  
3000 + 100  
800 + 100  
2500 + 100  
1500 + 400  
-
-
-
-
 
AC Voltage ±(ppm of setting + ppm of range), relative to calibration standards used.  
Calibration Interval 365 day, ±1°C of last TCAL  
Range  
Frequency  
1281  
HP3458/HFL  
8508A  
12.00000mV  
1Hz - 40Hz  
-
300 + 300  
-
40Hz - 1kHz  
-
200 + 110  
-
1kHz - 20kHz  
20kHz - 50kHz  
50kHz - 100kHz  
100kHz - 300kHz  
1Hz - 40Hz  
-
-
-
-
300 + 110  
1000 + 110  
5000 + 110  
40000 + 200  
-
-
-
-
120.0000mV  
-
70 + 40  
-
40Hz - 1kHz  
-
70 + 20  
-
1kHz - 20kHz  
20kHz - 50kHz  
50kHz - 100kHz  
100kHz - 300kHz  
300kHz - 1MHz  
1MHz - 2MHz  
1Hz - 10Hz  
-
-
-
-
-
-
-
-
140 + 20  
300 + 20  
800 + 20  
3000 + 100  
10000 + 100  
15000 + 100  
-
-
-
-
-
-
199.9999mV  
1.2000000V  
-
-
-
-
-
-
-
120 + 70  
120 + 70  
100 + 20  
100 + 10  
100 + 20  
300 + 40  
700 + 100  
10Hz - 40Hz  
40Hz - 100Hz  
100Hz - 2kHz  
2kHz - 10kHz  
10kHz - 30kHz  
30kHz - 100kHz  
1Hz - 40Hz  
100 + 20  
100 + 20  
100 + 20  
300 + 40  
700 + 100  
-
70 + 40  
-
40Hz - 1kHz  
-
70 + 20  
-
1kHz - 20kHz  
20kHz - 50kHz  
50kHz - 100kHz  
100kHz - 300kHz  
300kHz - 1MHz  
1MHz - 2MHz  
1Hz - 10Hz  
-
-
-
-
-
-
-
140 + 20  
300 + 20  
800 + 20  
3000 + 100  
10000 + 100  
15000 + 100  
-
-
-
-
-
-
1.999999V  
-
100 + 60  
10Hz - 40Hz  
-
-
100 + 10  
40Hz - 100Hz  
100Hz - 2kHz  
2kHz - 10kHz  
10kHz - 30kHz  
30kHz - 100kHz  
100kHz - 300kHz  
300kHz - 1MHz  
1Hz - 40Hz  
80 + 10  
60 + 10  
80 + 10  
200 + 20  
-
-
-
-
-
80 + 10  
60 + 10  
80 + 10  
200 + 20  
500 + 100  
3000 + 1000  
10000 + 10000  
500 + 100  
3000 + 1000  
10000 + 10000  
-
-
12.00000V  
-
-
-
-
-
-
-
-
70 + 40  
70 + 20  
140 + 20  
300 + 20  
800 + 20  
3000 + 100  
10000 + 100  
15000 + 100  
-
-
-
-
-
-
-
-
40Hz - 1kHz  
1kHz - 20kHz  
20kHz - 50kHz  
50kHz - 100kHz  
100kHz - 300kHz  
300kHz - 1MHz  
1MHz - 2MHz  
 
AC Voltage ±(ppm of setting + ppm of range), relative to calibration standards used.  
Calibration Interval 365 day, ±1°C of last TCAL  
Range  
Frequency  
1281  
HP3458/HFL  
8508A  
19.99999V  
1Hz - 10Hz  
-
-
100 + 60  
10Hz - 40Hz  
-
-
100 + 10  
40Hz - 100Hz  
100Hz - 2kHz  
2kHz - 10kHz  
10kHz - 30kHz  
30kHz - 100kHz  
100kHz - 300kHz  
300kHz - 1MHz  
1Hz - 40Hz  
80 + 10  
60 + 10  
80 + 10  
200 + 20  
-
-
-
-
-
-
-
80 + 10  
60 + 10  
80 + 10  
200 + 20  
500 + 100  
3000 + 1000  
10000 + 10000  
500 + 100  
3000 + 1000  
10000 + 10000  
120.0000V  
199.9999V  
-
-
-
-
-
-
-
-
200 + 40  
200 + 20  
200 + 20  
350 + 20  
1200 + 20  
4000 + 100  
15000 + 100  
-
-
-
-
-
-
-
40Hz - 1kHz  
1kHz - 20kHz  
20kHz - 50kHz  
50kHz - 100kHz  
100kHz - 300kHz  
300kHz - 1MHz  
1Hz - 10Hz  
-
-
-
-
-
-
-
-
100 + 60  
100 + 10  
80 + 10  
60 + 10  
80 + 10  
200 + 20  
500 + 100  
3000 + 1000  
10000 + 10000  
100 + 70  
100 + 20  
-
10Hz - 40Hz  
-
40Hz - 100Hz  
100Hz - 2kHz  
2kHz - 10kHz  
10kHz - 30kHz  
30kHz - 100kHz  
100kHz - 300kHz  
300kHz - 1MHz  
1Hz - 10Hz  
80 + 10  
60 + 10  
80 + 10  
200 + 20  
500 + 100  
3000 + 1000  
10000 + 10000  
-
1050.000V  
-
-
-
400 + 40  
400 + 40  
400 + 20  
-
600 + 20  
-
1200 + 20  
-
3000 + 20  
10Hz - 40Hz  
40Hz - 1kHz  
40Hz - 10kHz  
1kHz - 20kHz  
10kHz - 30kHz  
20kHz - 50kHz  
30kHz - 100kHz  
50kHz - 100kHz  
80 + 10  
80 + 20  
-
200 + 40  
-
500 + 200  
-
-
200 + 20  
-
500 + 100  
-
 
Fluke 8508A  
3458/HFL  
8508A vs 3458/HFL  
Functional & Versatility  
Parameters  
Comments  
8508A maintains >10Gohm input impedance  
to 20Vdc. This compares with 12V on  
3458/HFL. The 8508A 1050Vrms  
measurement is often used to calibrate  
calibrators at 1000 Vrms output.  
120mV, 1.2V, 12V, 120V,  
1050Vdc (ac = 700Vrms)  
Full Scale (dc & ac Voltage)  
200mV, 2V, 20V, 200V, 1050Vrms  
3458A/HFL has lower current ranges with a  
sensitivity of 1pA compared with 10pA on  
the 8508A – the 3458/HFL datasheet does  
state that lower ranges have ‘typical’  
uncertainty only. 8508A states typical above  
10kHz and 2GOhm for resistance.  
200uA, 2mA, 20mA, 200mA, 2A & 100nA, 1uA, 120uA, 1.2mA,  
Full Scale (dc & ac current)  
20A  
12mA, 120mA, 1.05A  
A 20Amp range on the 8508A improves  
calibration of Multi-product calibrators. This  
reduces the need for additional external  
shunts.  
A DMM with 10 MOhm input impedance is  
generally not useful for precision ac  
measurement above 1MHz. A 50 Ohm  
termination at these frequencies is more  
desirable.  
The 8508A high frequency Current  
uncertainty will help maintain good TURs  
when calibrating Multi-Product calibrators.  
AC Voltage - 1MHz (1%)  
AC Voltage - 10MHz (15%)  
AC Current - 100kHz (0.7%  
Typical)  
AC Measurement  
(Bandwidth)  
AC Voltage - 1MHz (2%)  
AC Current - 100kHz (0.4%)  
8508A has a wide resistance measurement  
range. 8508A measurement resolution of  
10nthis compares with 10uon  
3458/HFL  
2Ω, 20Ω, 200Ω, 2kΩ, 20kΩ,  
200k, 2M, 20M, 200M,  
2G, 20G(eleven ranges)  
12, 120, 1.2k, 12k,  
120k, 1.2M, 12M,  
120M, 1.2G(nine ranges)  
Full Scale (Resistance)  
Errors due to self-heating within the resistor  
under test are minimized when the  
multimeter low excitation current is  
maintained. Use in conjunction with RTD or  
low resistance measurements.  
Selectable excitation current -  
10mA & 1mA  
Fixed excitation current -  
10mA  
200 Ohm Resistance Range.  
 
8508A vs 3458/HFL  
Functional & Versatility  
Parameters  
Comments  
Reduces errors when performing high  
resistance measurement (feature available  
8508A - 20Mto 20Grange only)  
High Resistance  
Measurement (compliance  
voltage)  
Test Voltage or Full Scale  
stimulus @ 1.2G= 5V  
Test Voltage or Full Scale  
stimulus = 200V  
Current reversal reduces errors caused by  
thermal emfs as does switched current but  
reversal technique has the added benefit of  
reducing errors due to self heating  
Tru-Ohms or Offset  
Compensated Resistance  
technique.  
Current Reversal  
Switched Current  
Not Available  
PRT calibration coefficients are stored (max  
100 probes) within the 8508As internal  
memory.  
Store RTD temperature  
coefficients  
Supports a wide variety of PRT &  
SPRT sensors  
8508A - Precision without the need for  
internal drift corrections. ACAL will overwrite  
last stored value and cannot be retrieved.  
This might be important for users that  
require ‘as found data’.  
Required every 24hrs or ±1º C  
of last ACAL  
ACAL  
Not Required  
Auto-zero must be enabled on 3458A/HFL if  
environment exceeds ±1°C of last Input  
zero. Zero/nulling meters before  
measurement is accepted metrology  
practice.  
A-zero should be enabled to  
maintain specification  
Auto-zero (A-zero)  
Range zero is enabled by operator  
8508A is less intrusive when compared with  
conventional meters when measuring low  
magnitude current sources. The 8508A  
input impedance on the 200uA range is 60  
Ohm. This low impedance mimics  
technology normally found in Electrometers  
and picoampmeters. This compares with 5k  
– 10k Ohm on other DMMs.  
Low impedance low Current  
measurement technology  
Yes  
No  
Digitize sub sampled techniques are useful  
when measuring low frequency <1Hz input  
signals.  
ACV measurement  
technique  
Analog, Synchronous and  
Random sampled ac  
Analog True rms  
 
4-wire sense measurement support  
improved accuracy when calibrating  
calibrators with 4 wire sense output.  
Selectable 2 and 4-wire  
measurement.  
ACV & DCV 4 wire input.  
Unavailable  
IEEE control of GUARD terminal helps fully  
automate calibration without need for  
manual switching.  
Remote switched GUARD  
Terminal  
IEEE controlled  
Manual Switch  
High Speed - 150 readings/sec @ High Speed - 100,000  
High read rates are useful for some ATE  
applications where accuracy is not of high  
priority.  
Read rate  
5.5 digit resolution  
reading/sec @ 4.5 digit  
resolution  
Both techniques have their merits. 8508A  
and associated calibration technique  
Artifact Calibration & Individual provides full results traceability. ‘As found’  
Individual Function and Range  
calibration.  
Calibration technique  
Function and Range  
calibration.  
data is difficult to determine using 3458/HFL  
‘artifact’ calibration.  
Artifact calibration provides a low cost  
solution for adjustment.  
 
8508A vs 3458/HFL  
Ease of Use Parameters  
Comments  
Rear input switched remotely  
using IEEE 488 commands  
Instrument simultaneously  
displays Frequency as well as  
the AC voltage & current.  
The 3458/HFL must be switched manually  
using a front panel button.  
Yes  
Yes  
No  
Requires further commands or key presses  
to determine frequency.  
Selectable  
8508A can accept and compare dc to dc, ac  
to ac, dc to ac, Resistance to Resistance &  
Temperature to Temperature. Auto-ranging  
allows inputs of different magnitude to be  
connected and compared. Feature supports  
the replacement of Kelvin Varley dividers,  
resistance bridge and ac/dc transfer  
standards  
Two channel Ratio reference  
measurement  
Yes, but limited to 12Vdc on  
the Reference input  
Yes (8508A/01 only)  
Able to load SPRT/PRT  
calibration linearization  
coefficients and display  
temperature and resistance  
simultaneously.  
8508As displays resistance and temperature  
simultaneously.  
Yes (up to100)  
No  
When measuring Resistance in Ratio mode  
not only is the current the same but it is  
reversed to help reduce thermal offsets.  
Constant energization current on  
Resistance Ratio function.  
No (the 3458/HFL does not  
measure resistance ratio)  
Yes  
GPIB Remote interface  
IEEE-488.2  
IEEE-488.1  
8508A components are selected for  
minimum drift over time and temperature.  
Self-cal or ACAL function  
Not Required  
Required to meet specification Therefore does not require frequent internal  
calibration when conditions exceed TCAL  
specification.  
 
8508A Options and Accessories:  
Model  
8508A  
Description  
8.5 digit Reference Multimeter  
8508A/01  
8.5 digit Reference Multimeter with Rear Input Ratio measurement  
Accessories  
8508A-SPRT  
8508A-PRT  
8508A-LEAD  
Y8508  
Standard Platinum Resistance Thermometer  
Platinum Resistance Thermometer  
Comprehensive Measurement Lead Kit  
Rack Mount Kit  
Y8508S  
Rack Mount Kit Slides  
8508A-7000K  
1883673  
Calibration kit comprising 1GOhm Standard and connecting leads.  
UKAS Accredited Certification  
1256990  
NVLAP Accredited Certification  
Model  
Description  
3458/HFL/E  
Special Lab DMM, English  
3458/HFLM/E  
3458/HFL/E/AC  
3458/HFLM/E/120/AC  
Special Lab DMM, English, with -001 Extended Memory Option  
Special Lab DMM, English, + Accredited Calibration  
Special Lab DMM, English, with -001 Extended Memory Option + Accredited Calibration  
 
Notes:  
 

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