34465A Datasheet, PDF (17/23 Pages) Keysight Technologies – Digital Multimeters

17 | Keysight | Digital Multimeters: 34460/61/65/70A - Data Sheet
Measurement Characteristics
(for all models except where noted)
DC voltage
Measurement method: Keysight patented continuously integrating
multi-slope IV A/D converter
A/D Linearity
34460/61A
34465A
34470A
0.0002% of reading + 0.0001% of range
0.0001% of reading + 0.0001% of range
0.00005% of reading + 0.0001% of range
Input resistance
0.1 V, 1 V, 10 V range Selectable 10 MΩ or >10 GΩ
100 V, 1,000 V range 10 MΩ ± 1%
Input bias current
< 30 pA at 25 °C
Input terminals
Copper alloy
Input protection
1,000 V on all ranges
True RMS AC voltage
Measurement type
AC–coupled True RMS.
Measures the AC component of the input.
Measurement method Digital sampling with anti-alias filter
Maximum input
400 DCV, 1,100 Vpeak
Input impedance
1 MΩ ± 1%, in parallel with < 100 pF
Input protection
750 Vrms all ranges
DC and True RMS AC current
AC measurement type
Directly coupled to the fuse and shunt.
AC True RMS measurement (measures the AC
component only).
AC measurement
method
Digital sampling with anti-alias filter
Input protection 3 A
Externally accessible 3.15 A, 500 V fuse
(Replacement part number 2110-1547 3.15 A
external fuse)
Internal 11 A, 1,000 V fuse
(Replacement part number 2110-1402 11 A
external fuse)
Input protection 10 A
(34461/65/70A only)
Internal 11 A, 1000 V fuse
(Replacement part number 2110-1402 11 A
external fuse)
AC crest factor and peak input
Crest factor
10:1 maximum crest factor, (3:1 at full-scale).
Measurement bandwidth limited to 300 kHz for
signal plus harmonics.
Peak input
300% of range or maximum input
Overload ranging
Will select higher range if peak input overload
is detected during auto range. Overload is
reported in manual ranging.
Resistance
Measurement method Selectable 4-wire or 2-wire ohms.
Current source referenced to LO input.
Maximum lead
resistance (4-wire
ohms)
10% of range per lead for 100 Ω, 1 kΩ ranges.
1 kΩ per lead on all other ranges.
Input protection
1,000 V on all ranges
Continuity/diode test
Response time
300 samples/s with audible tone
Continuity threshold Fixed at 10 Ω
DC ratio
Measurement method Input HI-LO/reference (sense) HI-LO
Input HI-LO
100 mV to 1000 V ranges
Reference (sense)
HI-Input LO: 100 mV to 10 V ranges (autoranged)
Input to reference
(sense)
HI and LO reference (sense) terminals reference
to LO input < 12 V
Temperature
PT100 platinum RTD sensor, a = 0.00385Ω/Ω/°C; DIN/IEC 751.
Measurement conversions limited to –200 to 600 °C.
5 kΩ thermistor b = 3891; YSI 44007 or equivalent.
Measurement conversions limited to –80 to 150 °C.
Measurement noise rejection
60 Hz (50 Hz ) for 1 kΩ LO lead unbalance ( ± 500 V peak maximum)
DCV CMRR: 140 dB
ACV CMRR: 70 dB
Integration time
Normal mode rejection ¹
≥ to 1 PLC
60 dB ²
< 1 PLC
0 db
Frequency and period
Measurement method: Reciprocal-counting technique. Measurement is
AC-coupled using AC measurement functions.
Voltage ranges:
100 mVrms full scale to 750 Vrms. Auto or manual
ranging.
Gate time:
1 ms (34465/70A), 10 ms, 100 ms, or 1 s
Measurement
considerations
All frequency counters are susceptible to error
when measuring low-voltage, low-frequency
signals. Shielding inputs from external noise
pickup is critical for minimizing measurement
errors.
Autozero OFF operation
Following instrument warm–up at a stable ambient temperature ± 1 °C and
< 10 minutes.
Add 0.0002% of range + 5 µV for DCV or + 5 mΩ for resistance.
Measurement settling considerations
High-power settling
Applying high-power signals (more than 300 Vrms, 500 VDC, 1 A DC or
1 Arms) can cause self-heating in the signal-conditioning components.
These errors are included in the instrument specifications. Internal
temperature changes due to self-heating may cause additional error on
other functions or ranges. The additional error will generally dissipate
within a few minutes.
DC blocking capacitor
Errors will occur in ACV and Frequency functions when attempting to
measure an input following a DC offset voltage change. The input blocking
RC time constant must be allowed to fully settle (up to 1 second) before
the most accurate measurements are possible.
External connections
Reading settling times are affected by source impedance, cable dielectric
characteristics, and thermal EMF of connections. Keysight recommends
the use of PTFE or other high-impedance, low-dielectric absorption
wire insulation for these measurements. To maintain low thermal EMF,
connectors and wires made of copper are recommended.
1.  For power-line frequency ± 0.1%
2.  For power-line frequency ± 1%, the NMR is 40 dB
For ± 3%, use 30 dB