PXe-XT2640 | Single Phase | Three Phase Power Analyser

PXe-XT2640 Power Analyser

The PXe-XT2640 Three Phase Power Analyser is indeed a versatile power analyser and harmonics analyser with several notable features. Key capabilities:

  • Multi-Channel Measurement: The XT2640 combines the functionality of three single-phase power analysers into a single chassis. It supports up to four channels, allowing for flexible configuration options. Each channel can be individually configured, essentially functioning as a separate power analyser within the same unit
  • Three-Phase Measurements: The analyser supports three-phase measurements, catering to both 3-wire and 4-wire configurations. This capability is crucial for accurately assessing power characteristics in three-phase systems
  • Harmonics Analysis: In addition to power analysis, the XT2640 incorporates harmonics analysis functionality. It can measure and analyse harmonic content in the electrical signals, providing insights into waveform distortion and potential issues related to harmonics
  • Ethernet Connectivity: The XT2640 can connect multiple analysers via Ethernet, enabling simultaneous multi-channel measurements. This feature is particularly useful in scenarios where measurements are required in different locations or when close proximity to the load is necessary
  • Customisation Options: Users can customise measurement settings for each channel, including single-phase, two-phase, or three-phase configurations. The analyser supports various signal filtering options, measurement coupling, display result smoothing, and efficiency grouping. Additionally, voltage and current input channels can be synchronised if needed
  • Integration with Siemens S7 PLC: The XT2640 offers integration with a Siemens S7 PLC, a widely used programmable logic controller. This integration enables the creation of an automated power test system. The PLC can be programmed to respond to measurements obtained from the XT2640, initiating specific actions or sequences based on predefined conditions
  • Automated Control and Monitoring: The integration with the S7 PLC allows for automated control and monitoring systems. The PLC can perform actions such as system shutdown in response to overcurrent, over power, gross imbalance, or lost phase measurements. It can also send control commands to other equipment, trigger alerts, adjust settings, update reports, or activate alarms based on the measured data

Overall, the PXe-XT2640 three phase power analyser provides a comprehensive solution for power analysis and harmonics assessment. Its versatility, multi-channel capabilities, and integration with a PLC make it suitable for a wide range of applications, including power testing, automation, and monitoring systems.

Ask us about our Labview Drivers for this Power Analyser. We can also create bespoke Labview Drivers to suit your application requirements.

Click here to view the PXe-2640 Datasheet
XT2640

Channels may be individually configured, in effect as 3 virtual power analysers.

Each PXe-2640 channel can be independently configured for 1ph, 2ph, 3ph 3W, 3ph 4W, multi-channel wiring configurations, signal filtering, default measurement coupling, display results smoothing and efficiency grouping. Voltage and current input channels may be optionally synchronised to each other.

Product Features:

  • PXe-2640 has MU option (Multi-Unit Option) which allows the connections of up to 50 units, useful to perform synchronous Efficiency Measurements on Three Phase Input / Three Phase Output power conversion devices
  • Offers 1-4 simultaneous channels – all measuring Vrms, Vpk, Arms, Apk, Acf, A inrush, PF, W, VA, VAr, THD, THD+N, V Harmonics, A Harmonics
  • Allows input/output efficiency and power loss…for example testing variable speed drives, electric lighting and power supplies
  • Ideal for Avionics and EV
  • It is accurate with waveform distortion (accurate with non sinusoidal waveshapes)
  • DC-1MHz bandwidth
  • 0.03% basic accuracy
  • Colour display with Graphs/Bargraphs/Plots/Data logging
  • PC software available

Display Screen Features

Harmonics Screen

Harmonics Screen

Cycle View

Cycle screen

Power Data Screen

Power data Screen

Scope View

Scope View

Vector Screen

Vector Screen

History Screen

History Screen

XView Software

XView

While all PXe precision test equipment is designed to be used in a completely stand-alone manner, there are times when external tools can aid or enhance the operation of an instrument. XView software tools and drivers are designed to help easily configure an instrument from a single screen, or are used to view a complete set of measurements in a single screen. Other XView tools are designed for data collection where results can be recorded in an Excel-compatible file for post-processing, insertion into reports, or simply for archival purposes.

TECHNICAL SPECIFICATION

1 DIMENSIONAL, ENVIRONMENTAL AND POWER SUPPLY SPECIFICATIONS
Nominal Dimensions 137mm H x 248mm W x 284mm D (5.4″ x 9.75″ x 11.2″) without handle
Nominal Weight 3.2kg (71b) net, 5kg (11lb) in shipping carton
1.2 ENVIRONMENTAL
Storage Environment -20 to 75C (-4 to 167F) (non-condensing)
Operating Environment 0 to 40C (32 to 104F), <85% RH (non-condensing), Pollution Degree 2
Operating Altitude 0 to 2000m (6560ft) ASL
1.3 POWER SUPPLY
Line Power Installation Category II; 85-264Vrms, 45 to 65Hz, 40VA max. Internally fused with a non-user serviceable fuse
2 ELECTRICAL CHANNEL INPUT AND ACCURACY SPECIFICATIONS
Note: All percentages are % of reading unless otherwise stated
2.1 INPUT ISOLATION SPECIFICATIONS
Valid for any V terminal to PXe-2640 chassis ground; any A terminal to PXe-2640 chassis ground; and between any V and any A terminal.
Impedance >1GΩ II <30pF
Max. Voltage Max V without damage <4500Vpk

2500Vrms max for <1s without damage

1000Vrms max continuous rated working voltage (CAT I/II)

600Vrms max continuous rated working voltage (CAT III)

300Vrms max continuous rated working voltage (CAT IV)
2.2 VOLTAGE MEASUREMENT SPECIFICATIONS
The specifications for voltage are independent of the current input option installed in the respective channel
2.2.1 VOLTAGE INPUT CAPABILITY AND CHARACTERISTICS
Specification S Channel Type A Channel Type L Channel Type W Channel Type
No Damage Voltage Range <1ms
<100ms
<5S
Continuous
XT2640
<3000VRMS and VPK <500VRMS and 3000VPK <3000VRMS and VPK
<2000VRMS <300VRMS <1500VRMS
<1500VRMS <250VRMS <1000VRMS
<1000VRMS <160VRMS <650VRMS
As above
Measurable Voltage Range Unpowered
<1803VRMS and VPK <182.3VRMS and VPK <1803RMS and VPK
Specified Voltage Range <1000VRMS and <1750VPK <160VRMS and <175VPK <650VRMS and <1750VPK
Impedance Burden 1.201MΩ ± 0.25% 121kΩ ± 0.25% 399.5kΩ ± 0.25%
3dB Bandwidth(typical) 900kHz 3MHz
2.2.2 VOLTAGE MEASUREMENT ACCURACY
The charts below show guaranteed maximum voltage errors for DC, MAINS, AVIONICS, and 50kHz throughout a 1V to 1000V range of applied voltages expressed as % of reading and are valid within ±5C of the calibration temperature (add 0.005% per C beyond this) and where no significant common-mode is present. Following the charts is a table which can be used to calculate the guaranteed accuracies for applications other than shown in the charts and also for the computa­tion of numerical errors.
2.2.2.1 PRIMARY VOLTAGE MEASUREMENT ACCURACY TABLE
Add relevant errors from the table below for the maximum error in primary voltage measurements (e.g. DC, AC, AC +DC, Rectified, Peak, Valley, Peak-Valley).
MAXIMUM SCALING ERRORS

Apply to all results as shown below as a percentage of the reading

If signal contains significant levels at multiple frequencies, apply to each level & frequency
Specification S Channel Type A Channel Type L Channel Type W Channel Type
Base Scaling Error

Apply to all results

 0.1% 0.03% 0.1%

(0.2 % if 2ms LF/PERIOD)
Frequency Dependent Scaling Error

Apply to all results other than DC or MAINS

 AVIONICS
LF or VLF
<10kHz
10k-40kHz
40k-100kHz
100k-1MHz
>1MHz
None 0.005% None
0.01% 0.05%
F*0.005% F*0.002%
0.05%+(F-10)*0.012%
0.41 %+1F-40\*0.025 % 0.08 %+1F-40\*0.004 %
Typically (F/1000)2*100% 0.32 %+(F-100)*0.013%
Not specified Typically (F/3500)2*100%
Self-Heating Scaling Error

Apply to all results (only significant at higher voltages) 1 minute nominal time constant

 0.05%*(VAC+DC/ 1000)2 0.5 %*(VAC+DC/1000)2 0.15 %*(VAC+DC/1000)2
Temperature Scaling Error

Apply to all results if outside of ±5C from calibration temperature

 0.005% per C outside of ±5C from calibration temperature
Bandwidth Limit Scaling Error Apply if using USER bandwidth setting 10%*(F/FBW)2, unspecified for F > 0.3*FBW
MAXIMUM FLOOR ERRORS

Apply to all results as shown below in Volts (generally only significant at low input)
Specification S Channel Type A Channel Type L Channel Type W Channel Type
Base Floor Error

Apply to all results

 1.8mV 450µV 45µV 1.8mV
DC Floor Error

Apply to DC and RECTIFIED results

Apply to AC+DC results after multiplying by VDC/VAC+DC

 3mV 1mV 100µV 5mV
AC Floor Error

Apply to AC, AC+DC, and RECTIFIED results

 MAINS. LF. VLF & FBW<10kHz
AVIONICS & FBW<50kHz
Otherwise
100µV/VRDG 100µV/VRDG 4µV/VRDG 200µV/VRDG
300µV/VRDG 300µV/VRDG 8µV/VRDG 650µV/VRDG
1.1mV/VRDG 1.1mV/VRDG 11µV/VRDG 1.5mV/VRDG
Peak Floor Error

Apply to PK, VL-N and PK VL-N results

 MAINS. LF. VLF & FBW<10kHz
AVIONICS & FBW<50kHz
Otherwise
40mV 40mV 8mV 60mV
75mV 75mV 11mV 125mV
125mV 125mV 17mV 175mV
Common Mode Error

Apply to AC, AC+DC, and RECTIFIED results apply using voltage on V LO terminal relative to chassis ground. Error has 90′ phase shift to common-mode voltage

 1µV per V.Hz

(11.5mV@230V/50Hz)

 100nV per V.Hz

(1.15mV@230V/50Hz)

 700nV per V.Hz

(8.05mV@230V/50Hz)
Adjacent Channel Error

Apply to AC, AC+DC, and RECTIFIED results

Apply using adjacent channel A LO or V LO terminal voltage relative to chassis ground. Error has 90′ phase shift to adjacent channel voltage

 300nV per V.Hz

(3.45mV@230V/50Hz)

 30nV per V.Hz

(345µV@230V/50 Hz)

 210nV per V.Hz

(2.415mV@230V/50Hz)
2.2.2.2 SECONDARY VOLTAGE MEASUREMENT ACCURACY TABLE
Specification S Channel Type A Channel Type L Channel Type W Channel Type
Crest Factor Error (Total Floor Error from preceding table for PK results)/VAC
Form Factor Error (Total Floor Error from preceding table for AC+DC results)/VRECTIFIED
Inter-Channel Error

For 120° between equal amplitudes

 (Relevant Voltage Errors from preceding table at the inter-channel voltage) + 0.0015%*F
Harmonic or Spectrum Error
<10kHz
10k-115kHz
115k-435kHz
AC Voltage Errors from preceding table at V and F of the harmonic or spectrum point

+ (H/ N)2*0.3% of reading

+ (if not fundamental) from below using the frequency of the harmonic or spectrum point
0.01% of VAC+DC 0.006% of VAC+DC 0.015% of VAC+DC
0.05% of VAC+DC 0.03% of VAC+DC
Not Available 0.08% of VAC+DC
Inter-Channel Fundamental Phase Error 0.02°+0.15°*F 0.01°+0.07°*F
Harmonic-Fundamental Phase Error (typical, BANDWIDTH configured as UNFILTERED) 0.02°+0.1°*F+0.001°*H 0.02°+0.03°*F+0.001°*H
%THD Error Errors shown are all expressed in % THD units
<10kHz
10k-115kHz
115k-435kHz
(0.005+0.000025*N)*% THD+0.00005*N*✓N

+ from below using the frequency of highest included harmonic
0.025+ 1.25/VAC 0.015+1/VAC 0.015+0.2/ 0.03+ 1.5/VAC
VAC 0.15+3.5/VAC 0.15 0.06+ 4/VAC
+0.35/VAC Not Available 0.15+4/VAC
2.3 CURRENT MEASUREMENT SPECIFICATIONS

2.3.1 CURRENT INPUT CAPABILITY AND CHARACTERISTICS
Specification Channal Type Option H Option D HI Range or Auto-Range when on HI Range Option D LO Range or Auto-Range when on LO Range Option X HI Range Option X LO Range
No Damage Current Range <8ms
<40ms
<1s
Continuous
XT2640 Unpowered
All <200ARMS and <300APK <150ARMS and <250APK <60ARMS and <150APK <200VRMS and <300VPK <20VRMS and <30VPK
All <75ARMS <50ARMS <40ARMS <50VRMS <10VRMS
All <50ARMS <30ARMS <5ARMS <30VRMS <5VRMS
All <30ARMS <20ARMS <2ARMS <25VRMS and VPK <5VRMS and VPK
All As Above <2VRMS and <150VPK <25VRMS and <300VPK
Measurable current Range All <225ARMS and APK <150ARMS and APK <1.02ARMS and APK <23.1VRMS and VPK <0.576VRMS and VPK
Specified Current Range All <30ARMS and <200APK <20ARMS and <140APK <1ARMS and APK <15VRMS and <20VPK <0.55VRMS and VPK
Impedance Burden All 2.5mΩ to 7mΩ 4mΩ to 12mΩ 0.562Ω ± 0.75mΩ 20.5KΩ ± 0.25% 10.25KΩ ± 0.25%
3dB Bandwidth (typical) S, A or L 1.25MHz
W 5MHz 3MHz
2.3.2. CURRENT MEASUREMENT ACCURACY
The charts below show guaranteed maximum current errors for DC, MAINS, AVIONICS, and 50kHz throughout a 100µA to 30A range of applied currents expressed as % of reading and are valid within ±5C of the calibration temperature (add 0.005% per C beyond this) and where no significant common-mode is present. Following the charts is a table which can be used to calculate
2.3.2.1 PRIMARY CURRENT MEASUREMENT ACCURACY TABLE
Add relevant errors from the table below for the maximum error in primary current measurements (e.g. DC,AC, AC+ DC, Rectified, Peak, Valley, Peak-Valley).
MAXIMUM SCALING ERRORS

Apply to all results as shown below as a percentage of the reading

If signal contains significant levels at multiple frequencies, apply to each level & frequency
Specification Channel Type Option H Option D HI Range Option D LO Range Option X HI Range Option X LO Range
Base Scaling Error

Apply to all results

 A or L 0.03%
S or W 0.1% (0.2% if 2ms LF/PERIOD)
Frequency Dependent Scaling Error

Apply to all results other than DC or MAINS

 LF or VLF
AVIONICS
<10kHz
10k-40kHz
40k-100kHz
100k-1MHz
>1MHz
S,A or L 0.01%
W 0.05%
A or L 0.002%
S or W None
S,A or L F*0.003%
W F*0.0015%
S,A or L 0.03%+(F-10)*0.007%
W F*0.0015%
S,A or L 0.24%+(F-40)*0. 02%
W 0.06%+(F-40)*0.003% 0.06 %+(F-40)*0 .004%
S,A or L Typically (F/ 1250)2*100%
W 0.24%+(F-100)*0.012% 0.3%+(F-100)*0. 015%
W Typically (F/5000)2*100% Typically (F/3000)2*100%
Self-Heating Scaling Error

Apply to all results (only significant at higher currents) 3 minute nominal time constant

 All 0.00015%*AAC+DC2 0.0002%*AAC+DC2 None
Temperature Scaling Error

Apply to all results if outside of ±5C from calibration temperature

 All 0.005% per C outside of ±5C from calibration temperature
Bandwidth Limit Scaling Error Apply if using USER bandwidth setting All 10%*(F FBW)2, unspecified above 0.3*FBW
MAXIMUM FLOOR ERRORS

Apply to all results as shown below in Amps (generally only significant at low input)
Specification Channel Type Option H Option D HI Range Option D LO Range Option X HI Range Option X LO Range
Base Floor Error

Apply to all results

 A or L 56µA 38µA 250nA 6µV 150nV
S or W 225µA 150µA 1µA 23µV 600nV
DC Floor Error

Apply to DC and RECTIFIED results

Apply to AC+DC results after multiplying by VDC/VAC+DC

 A or L 0.23mA 0.15mA 1µA 40µV 5µV
S 0.45mA 0.3mA 2µA 80µV 6µV
W 0.68mA 0.45mA 3µA 120µV 8µV
AC Floor Error

Apply to AC, AC+DC, and RECTIFIED results

 MAINS. LF. VLF & FBW<10kHz
AVIONICS & FBW<50kHz
Otherwise
S,A or L 3.3µA/ARDG 1.5µA/ARDG 90pA/ARDG 35nV/ARDG 20pV/ARDG
W 5µA/ARDG 2.5µA/ARDG 125pA/ARDG 50nV/ARDG 50pV/ARDG
S,A or L 33µA/ARDG 15µA/ARDG 0.9nA/ARDG 350nV/ARDG 200pV/ARDG
W 50µA/ARDG 25µA/ARDG 1.25nA/ARDG 500nV/ARDG 500pV/ARDG
S,A or L 330µA/ARDG 150µA/ARDG 9nA/ARDG 3.5µV/ARDG 200nV/ARDG
W 500µA/ARDG 250µA/ARDG 12.5nA/ARDG 5µV/ARDG 5nV/ARDG
Peak Floor Error

Apply to PK, VLY and PK-VLY results

 MAINS. LF. VLF & FBW<10kHz
AVIONICS & FBW<50kHz
Otherwise
S,A or L 8mA 5mA 40µA 0.75mV 25µV
W 10mA 6.5mA 50µA 0.9mV 30µV
S,A or L 25mA 17mA 125µA 2.5mV 65µV
W 30mA 20mA 150µA 3mV 80µV
S,A or L 75mA 50mA 400µA 7.5mV 200µV
W 90mA 60mA 500µA 10mV 250µV
Common Mode Error

Apply to all results

Apply using voltage on A LO terminal relative to chassis ground. Error has 90° phase shift to common-mode voltage

 All 500pA per V.Hz

(5.75µA@230V/50 Hz)

 400pA per V.Hz

(4.6µA@230V/50Hz)

 20pA per V.Hz

(0.23µA@230V/50Hz)

 15nV per V.Hz

(0.172mV@230V/50Hz)

 0.5nV per V.Hz

(5.75µV@230V/50Hz)
Adjacent Channel Error

Apply to all results

Apply using adjacent channel A LO or V LO terminal voltage relative to chassis ground. Error has 90° phase shift to adjacent channel voltage

 All 150pA per V.Hz

(1.725µA@230V/50Hz)

 120pA per V.Hz

(1.38µA@230V/50Hz)

 7pA per V.Hz

(80.5nA@230V/50Hz)

 7nV per V.Hz

(80.5µV@230V/50 Hz)

 0.2nV per V.Hz

(2.3µV@230V/50Hz)
2.3.2.2 SECONDARY CURRENT MEASUREMENT ACCURACY TABLE
Specification Channel Type Option H Option D HI Range Option D LO Range Option X HI Range Option X LO Range
Crest Factor Error All (Total Current Floor Error from preceding table for PK results)/AAC
Form Factor Error All (Total Current Floor Error from preceding table for AC+DC results)/ARECTIFIED
Multi-Channel Error

For similar current level and phase in each phase.

 AN (2θ3w)
AθC (3θ3w 2ch)
AN (3θ4w)
All Relevant Current Errors from preceding table for AθA

+ Relevant Current Errors from preceding table for

AθB + 0.0005% of (AθA + AθB)*F
All Relevant Current Errors from preceding table for AθA

+ Relevant Current Errors from preceding table for

AθB + 0.0015% of (AθA + AθB)*F
All Relevant Current Errors from preceding table for AθA

+ Relevant Current Errors from preceding table for

AθB + Relevant Current Errors from preceding table

for AθC + 0.0015% of (AθA + AθB + AθC)*F
Harmonic or Spectrum Error
<10kHz
10k-115kHz
<10kHz
10k-115kHz
<10kHz
10k-115kHz
115k-435kHz
All AC Current Errors from preceding table at A and F of the harmonic or spectrum point

+ (H/N)2″0.3% of reading

+ (if not fundamental) from below using the frequency of the harmonic or spectrum Point
A or L 0.006% of AAC+DC
0.05% of AAC+DC
S 0.01% of AAC+DC
0.05% of AAC+DC
W 0.015% of AAC+DC
0.03% of AAC+DC
0.08% of AAC+DC
Current-Voltage
Fundamental Phase Error		 S, A or L 0.005° + 0.015°*F
W 0.005° + 0.007°*F
Harmonic-Fundamental Phase Error (typical, BANDWIDTH configured as UNFILTERED) S, A or L 0.02°+0.1°*F+0.001°*H
W 0.02°+0.03°*F+0.001°*H
%THD Error Errors shown are all expressed in %THD units.
<10kHz
10k-115kHz
<10kHz
10k-115kHz
<10kHz
10k-115kHz
115k-435kHz
All (0.005+0.000025*N)*%THD+0.00005 *✓N

+ from below using the frequency of highest included harmonic
A or L 0.015+0.2/AAC 0.015+0.15/AAC 0.015+0.001/AAC 0.015+0.025/AAC 0.015+0.0006/AAC
0.15+2/AAC 0.15+1.5/AAC 0.15+0.01/AAC 0.15+0.25/AAC 0.15+0.006/AAC
S 0.025+0.2/AAC 0.025+0.15/AAC 0.025+0.001/AAC 0.025+0.025/AAC 0.025+0.0006/AAC
0.15+2/AAC 0.15+1.5/AAC 0.15+0.01/AAC 0.15+0.25/AAC 0.15+0.006/AAC
W 0.03+0.25/AAC 0.03+0.18/AAC 0.03+0.0012/AAC 0.03+0.03/AAC 0.03+0.001/AAC
0.06+2 .5/AAC 0.06+1.8/AAC 0.06+0.012 /AAC 0.06+0.3/AAC 0.06+0.01/AAC
0.15+2.5/AAC 0.15+1.8/AAC 0.15+0.012/AAC 0.15+0.3/AAC 0.15+0.01/AAC
2.4.1 WATTS, VAR AND VA MEASUREMENT SPECIFICATIONS
2.4.1.1 PRIMARY WATTS, VAR AND VA MEASUREMENT ACCURACY TABLE

Add relevant errors from the table below for the maximum error in all Watts, VA and VAR measurements except harmonic Watts.

Note that by definition DC Watts and DC VA are identical, and DC VAR is zero
MAXIMUM SCALING ERRORS

Apply to all results as shown below as a percentage of the reading

If signal contains significant levels at multiple frequencies, apply to each level
Specification Channel Type Option H Option D HI Range Option D LO Range Option X HI Range Option X LO Range
Base Scaling Error

Apply to all results

 A or L 0.045%
S or W 0.15% (0.3% if 2ms LF/PERIOD)
Frequency Dependent Scaling Error

Apply to AC component of all results other than DC or MAINS

 LF or VLF
AVIONICS
<10kHz
10k-40kHz
40k-100kHz
100k-1MHz
>1MHz
S,A or L 0.01%
W 0.05%
A or L 0.005%
S or W None
S,A or L F*0.006%
W F*0.0025%
S,A or L 0.06%+(F-10)*0.0014%
W F*0.0025%
S,A or L 0.48%+(F-40)*0.032%
W 0.01%+(F-40)*0.005% 0.01%+(F-40)*0.0055%
S,A or L Typically (F/1100)2*150%
W 0.4%+(F-100)*0.018% 0.43%+(F-100)*0.02%
W Typically (F/5000)2*150% Typically (F/3000)2*150%
Self-Heating Scaling Error

Apply as % of Power reading to all results using voltage and current Self- Heating Errors from previous tables

 All Add Voltage and Current Self-Heating Errors
Temperature Scaling Error

Apply to all results if outside of ±5C from calibration temperature

 All 0.005% per C outside of ±5C from calibration temperature
Bandwidth Limit Scaling Error Apply to AC component of alI results if using USER bandwidth setting All 20%*(F/FBW)2, unspecified above 0.3*FBW
MAXIMUM FLOOR ERRORS

Apply to all results as shown below in Watts, VA or VAR as applicable (generally only significant at low input)
Specification Channel Type Option H Option D HI Range Option D LO Range Option X HI Range Option X LO Range
Base Floor Error

Apply to all results

 L (VAC+DC*56µA) + (AAC+DC*45µV) (VAC+DC*38µA) + (AAC+DC*45µV) (VAC+DC*250nA) + (AAC+DC*45µV) (VAC+DC*6µA) + (AAC+DC*45µV) (VAC+DC*0.15µA) + (AAC+DC*45µV)
A (VAC+DC*56µA) + (AAC+DC*450µV) (VAC+DC*38µA) + (AAC+DC*450µV) (VAC+DC*250nA) + (AAC+DC*450µV) (VAC+DC*6µA) + (AAC+DC*450µV) (VAC+DC*0.15µA) + (AAC+DC*450µV)
S or W (VAC+DC*225µA) + (AAC+DC*1.8mV) (VAC+DC*150µA) + (AAC+DC*1.8mV) (VAC+DC*1µA) + (AAC+DC*1.8mV) (VAC+DC*23µA) + (AAC+DC*1.8mV) (VAC+DC*0.6µA) + (AAC+DC*1.8mV)
DC Floor Error

Apply to DC and AC+DC results using the Voltage and Current DC Floor Errors from previous tables

 All (VDC*Current DC Floor Error) + (ADC*Voltage DC Floor Error) + (Current DC Floor Error*Voltage DC Floor Error)
AC Floor Error (VA and VAR only) Apply to AC and AC+DC VA & VAR results using voltage and current AC Floor Errors from previous tables All (VAC*Current AC Floor Error) + (AAC*Voltage AC Floor Error)
Common Mode Error (VA and VAR only) Apply to AC component of VA and VAR results using the Voltage and Current Common Mode Errors from previous tables. All (VAC*Current Common Mode Error) + (AAC*Voltage Common Mode Error)
Common Mode Error (Watts only) Apply to AC component of Watts results using the Voltage Common Mode Error from previous table All (AAC*Voltage Common Mode Error)
Adjacent Channel Error Apply to AC component of all results using the Voltage and Current Adjacent Channel Errors from previous tables All (VAC*Current Adjacent Channel Error) + (AAC*Voltage Adjacent Channel Error)
Phase Floor Error (Watts only) Apply to AC and AC+DC Watts results s, A or L VAFUND*(PFFUND – cos(cos-1(PFFUND) + 0.015 F))

Alternately, as a worst case (at PF=O) this can expressed as F*0.028% of VA
W VAFUND*(PFFUND – cos(cos-1(PFFUND) + 0.007°*F))

Alternately ,as a worst case (at PF=O) this can expressed as F*0.013% of VA
2.4.1.2 HARMONIC WATTS MEASUREMENT ACCURACY TABLE
Specification Channel Type Option H Option D HI Range Option D LO Range Option X HI Range Option X LO Range
Harmonic or Spectrum Error
<10kHz
10k-115kHz
<10kHz
10k-115kHz
<10kHz
10k-115kHz
115k-435kHz
All AC Watts Errors other than Phase Floor Error from preceding table at levels and F of the harmonic or spectrum point + (H/N)2*0.5% of reading

+ from below using the frequency of the harmonic or spectrum point
A or L 0.006% + (0.004%+0.028%*F)/PF
0.05% + (0.004%+0.028%*F)/PF
S 0.01% + (0.004%+0.028%*F)/PF
0.05% + f0.004%+0.028%*Fl/PF
W 0.015% + (0.004%+0.013%*F)/PF
0.03% + (0.004%+0.013%*F)/PF
0.08% + f0.004%+0.013%*Fl/PF
2.5.1 PF MEASUREMENT ACCURACY TABLE
Add relevant errors from the table below for the maximum error in PF measurements. For PFFUND apply only the Base Floor and Phase Errors.

Note: DC PF is 1.0 by definition and has no error; the table below applies to AC, AC+DC and FUND PF results.
Specification Channel Type Option H Option D HI Range Option D LO Range Option X HI Range Option X LO Range
Base Floor Error Apply to all PF results L (56µA/AAC+DC) + (45µV/VAC+DC) (38µA/AAC+DC) + (45µV/VAC+DC) (250nA/AAC+DC) + (45µV/VAC+DC) (6µA/AAC+DC) + (45µV/VAC+DC) (0.15µA/AAC+DC) + (45µV/VAC+DC)
A (56µA/AAC+DC) + (450µV/VAC+DC) (38µA/AAC+DC) + (450µV/VAC+DC) (250nA/AAC+DC) + (450µV/VAC+DC) (6µA/AAC+DC) + (450µV/VAC+DC) (0.15µA/AAC+DC) + (450µV/VAC+DC)
S or W (225µA/AAC+DC) + (1.8mV/VAC+DC) (150µA/AAC+DC) + (1.8mV/VAC+DC) (1µA/AAC+DC) + (1.8mV/VAC+DC) (23µA/AAC+DC) + (1.8mV/VAC+DC) (0.6µA/AAC+DC) + (1.8mV/VAC+DC)
AC Floor Error Apply to all PF results using voltage and current AC Floor Error from previous tables this error always causes a reduced PF reading All -PFRDG*((Current AC Floor Error/ARDG) + (Voltage AC Floor Error/VRDG))
DC Floor Error Apply to AC+DC PF result after multiplying by (1-PF) L (0.23mA/AAC+DC) + (0.1mV/VAC+DC) (0.15mA/AAC+DC) + (0.1mV/VAC+DC) (1µA/AAC+DC) + (0.1mV/VAC+DC) (40µA/AAC+DC) + (0.1mV/VAC+DC) (5µA/AAC+DC) + (0.1mV/VAC+DC)
A (0.23mA/AAC+DC) + (1mV/VAC+DC) (0.15mA/AAC+DC) + (1mV/VAC+DC) (1µA/AAC+DC) + (1mV/VAC+DC) (40µA/AAC+DC) + (1mV/VAC+DC) (5µA/AAC+DC) + (1mV/VAC+DC)
S (0.45mA/AAC+DC) + (3mV/VAC+DC) (0.3mA/AAC+DC) + (3mV/VAC+DC) (2µA/AAC+DC) + (3mV/VAC+DC) (80µA/AAC+DC) + (3mV/VAC+DC) (6µA/AAC+DC) + (3mV/VAC+DC)
W (0.68mA/AAC+DC) + (5mV/VAC+DC) (0.45mA/AAC+DC) + (5mV/VAC+DC) (3µA/AAC+DC) + (5mV/VAC+DC) (120µA/AAC+DC) + (5mV/VAC+DC) (8µA/AAC+DC) + (5mV/VAC+DC)
Phase Error Apply to all PF results S, A or L (PFFUND – cos(cos-1(PFFUND) ± 0.015°*F))

Alternately, as a worst case (at PF=O) this can expressed as F*0.00028
W (PFFUND – cos(cos-1(PFFUND) ± 0.007°*F))

Alternately, as a worst case (at PF=O) this can expressed as F*0.00013
3. MECHANICAL CHANNEL INPUT AND ACCURACY SPECIFICATIONS (MT TYPE): 3.1 INPUT CAPABILITIES AND CHARACTERISTICS
Input Terminals SPD {Speed): BNC(Isolated from XT2640 chassis), configurable as analog or digital input TRQ (Torque):BNC (isolated from XT2640 chassis), configurable as analog or digital input DIR (Direction) : BNC (isolated from XT2640 chassis), digital input
Input Common-Mode Up to-15VPK to + 15VPK specified

Up to-30VPK to + 30VPK with no damage
Analog Input Range Up to-12VDC to + 12VDC specified

Up to-15VPK to + 15VPK specified

Up to-30VPK to + 30VPK with no damage
Digital Input Range LO:<0.5V (nominal)

HI:>2V (nominal)

Up to-30VPK to + 30VPK with no damage
Input Impedance Each input nominally 150KΩ to XT2640 chassis ground
3.2 DIGITAL INPUT MEASUREMENT SPECIFICATIONS
Digital Frequency Timing Signal must be LO for >500ns

Signal must be HI for >500ns

Frequency measurement up to 500KHz {typically 900KHz)

Minimum measurable frequency limited by user set measurement period
DIR Setup/Hold Timing DIR must best-able for >550ns prior to and after active edge of SPD input
Maximum Frequency Error Measurement Period >10ms: 0.01%

Measurement Period <lOms: 0.015%
Cycle Period Time From 2.3us (W type channels), 8.7us (otherwise) up to 100 seconds
Resolution Method 1/512th of a cycle
Maximum Error Mean cycle formed by asynchronously sampling all cycles within measurement period

As Voltage and Current Specifications tor PK data 011/atts = multiplication of V and A waveforms)
3.3 ANALOG INPUT MEASUR EMENT SPECIFICATIONS
Maximum Input Error 0.05% + 1mV

Add (0.005% + 50µV) per C outside of ±5C from calibration temperature
4 ANALYSIS SPECIFICATIONS: 4.1 INTEGRATION SPECIFICATIONS
Start Delay Time Zero to 99 days, 99 hours, 99 minutes, 99 seconds (1 second resolution) 0.01% + 8ms maximum error
Integration Time Manual (unrestricted period of time), or 1 second to 99 days), 99 hours, 99 minutes, 99 seconds 0.01% + rms maximum error
Maximum Data (0.01% + 1ms) (not for integrated average data) (0.03/measurement period in seconds)% per year error
4.2 HARMONIC ANALYSIS SPECIFICATIONS
Method DFT performed at each frequency on same set of sampled signals (there is no discontinuity throughout the analysed frequency range)
Window Maximum F> (measurement period): Hann (also called Hanning) Otherwise: Rectangular
Harmonic The smaller of –

a) A frequency of 435kHz (W type charnels) or 115kHz (otherwise)

b) 500th (harmonic over the 100th, requires option H500)

c) HARMONICS setting

d) If BANDWIDTH set to USER:0.5’setting/ fundamental frequency
Harmonic Bandwidth Nominally the greater of –

a) The smaller of fundamental frequency or 2/(LF/PERIOD measurement period)

b) If FUND set to AVIONICS:20Hz

c) (Fundamental frequency* Maximum Harmonic/2250)
Measurement Nominally (1/Harmonic Bandwidth)
Period Update Internal Nominally the greater of –

a) LF/PERIOD measurement period

b) Harmonic Measurement Period (from above)

c) 0.25ms x ∑(Maximum Harmonic for each channel configured for harmonics)
Data Available Volts,Amps and Watts amplitudes for each configured harmonic

Volts and Amps as a percentage of the fundamental of the same signal

Volts and Amps THD as a percentage of the fundamental of the same signal

Volts and Amps THD as a percentage of the AC+DC am platitude of the same signal

V and A Phase of fundamental relative to the voltage fundamental of the lowest numbered channel in the VPA

V and A Phase of each non-fundamental harmonic relative to the fundamental of the same signal
Accuracy See relevant Voltage, Current and Watts accuracy specifications
4.3 SPECTR UM ANALYSIS SPECIFICATIONS
Method DFT performed at each frequency on same set of sampled signals (there is no discontinuity throughout the analysed frequency range)
Window Hann (also called Hanning)
Frequency 0.01Hz to 1kHz
Resolution Nominally (1/frequency Resolution)
Measurement Period minimum is 100 x Frequency Resolution
Maximum Frequency Maximum is the lowest of nominally –

a) 16384 x frequency Resolution (under some circumstances as low as B192 x frequency Resolution)

b) 435kHz (W type channels) or 115kHz (otherwise)
Data Available Volts, Amps am Watts amplitudes for each configured spectrum
Accuracy frequency see relevant Voltage, Current and Watts accuracy specifications
4.4 CYCLE VIEW SPECIFICATIONS
Signal Range As specifications for Voltage and Current
4.5 FREQUENCY MEASUREMENT SPECIFICATIONS
Frequency Range FUND setting of MAINS:45Hz to 65Hz

FUND setting of AVIONICS:300Hz to 900Hz Otherwise –

LF/PERIOD setting of VLF:0.0099Hz to 65Hz

LF/PERIOD setting of LF:0.19Hz to 1kHz

LF/PERIOD setting of 300ms period:9Hz to 305kHz (W channel type) or 80kHz (other channel types) LF/PERIOD setting of 100ms period: 19Hz to305KHz (W channel type) or 80KHz (other channel types) LF/PERIOD setting of 20ms period: 44Hz to 305KHz (W channel type) or 80KHz (other channel types) LF/PERIOD setting of 10ms period: 145Hz to 305KHz (W channel type) or 80KHz (other channel types) LF/PERIOD setting of 2ms period:495Hz to 305KHz (W channel type) or 80KHz (other channel types) If BANDWIDTH set to USER setting then upper limit is 0.5*setting
DC Level DC offset is automatically eliminated
Min. input (typical) Voltage: 0.5Vrms (W, S or A channel type) or 75m Vrms (L channel type) at fundamental Current,H option:0.05Arms at fundamental

Current,D option: 0.04 Arms (HI range) or 0.3m Arms (LO range) at fundamental Current, X option: 5m Vrms (HI-range) or 150µ Vrms (LO range) at fundamental
Min.Pulse Width (typical) Greater of-

1.25µs (W channel type) or 5µs (other channel types) 0.001% of measurement period 10% of signal period
Update Period (nominal) As shown below for FREQ SPEED settings of FAST/NORMAL/SLOW respectively – LF/PERIOD setting of VLF:greater of 1/2/15s or 1 cycle LF/

PERIOD setting of LF:greater- of 1/1/5s or 1 cycle LF/

PERIOD setting of 300ms period: 0.25s/0.75s/2s LF/PERIOD setting of 100ms period: 55ms/250ms/1s LF/PEROD setting of 20ms period: 25ms/200ms/700ms LF/ PERIOD setting of 10ms period: 10ms/l00ms/300ms LF/PERIOD setting of 2ms period:2ms/50ms/150ms
Resolution W Channel Type:0.000125%/ Update Period in seconds Otherwise:0.0005%/ Update Period in seconds
(nominal) Maximum 0.01% + Resolution
Setting Time (nominal) Error Greater of (2 if significant DC content) –

a) 2 amplitude periods

b) 2 frequency measurement periods

c) 4 cycles of the signal
4.5 SCOPE SPECIFICATIONS
Signal Range As specifications for Voltage and Current
Timebase 1/2/5 settings from Sus/div to 20s/div
Capture Depth Up to 32k points per signal
Capture Resolution <0.00005% of specified maximum measurable peak Voltage or Current
Sampling Period (nominal) Greater of –

1.1µs 011 (W type channels) or 4.1µs

(otherwise) 0.03% of timebase setting
Maximum Error As Voltage and Current Specifications for PK data (Watts = multiplication of V and A waveforms)
4.6 HISTORICAL DATA COLLECTION SPECIFICATIONS
Collection Time Automatically continuously variable between 1 measurement period and 5 years (collection is automatically stopped after this time has elapsed but this is untested at the time of writing)
Time Note: this is the resolution by which you can determine when an event occurred, not that of the XT2640 detecting events. All events are captured.
Resolution The greater of-

a) 1 pixel of displayed data (front panel) or 1 increment of the requested time interval (interface)

b) 1 measurement period of the data being recorded

c) A maximum of 1/4096th of the elapsed historical data collection time (typically 1/8192th).
Data Capture Every measurement is included in the maximum, average and minimum data tor each increment of the time resolution interval regardless of the time resolution.
4.7 DATA LOGGING SPECIFICATIONS
Logged Measurements Up to 16 measurement data per record (each of which can be 1 measurement or up to 500 harmonic measurements)
Data per Record Up to 8003 data per record
Internal FIFO 32Mbyte (always in binary format, 4 bytes per data)
Buffer Internal >2Gbyte (always in binary format, 4 bytes per data) non-volatile Typically
Memory 5Mbytes/sec maximum sustained mean write rate
External Data File Format ASCII (CSV, scientific format) or Binary
Timestamp Record number + optional date and time (1 second resolution)
Maximum File Size 4Gbyte
Maximum Records Only limited by maximum file size
Start Delay Time Zero to 99 days, 99 hours, 99 minutes, 99 seconds (1 second resolution) 0.01% + 8ms maximum error
Run Time Manual (unrestricted period of time), or 1 second to 99 days, 99 hours, 99 minutes, 99 seconds (1 second resolution)

0.01% + 8ms maximum error
Log Interval 0.002 second, or 0.01 second to 99 hours, 99 minutes, 99.99 seconds (0.01 second resolution) 0.01% maximum error ± 2ms non-accumulating error

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