1 DIMENSIONAL, ENVIRONMENTAL AND POWER SUPPLY SPECIFICATIONS

1.1 DIMENSIONAL

Nominal Dimensions

137mmH x 248mmW x 284mmD (5.4″ x 9.75″ x 11.2″) with feet not

Nominal Weight

extended 3.2kg (71b) net, 5kg (11lb) shipping

1.2 ENVIRONMENTAL

Storage Environment

20 to 75C (4 to 167F) (noncondensing)

Operating Environment

0 to 40C (32 to 104F), <85% RH (noncondensing), Pollution

Operating Altitude

Degree 2 0 to 2000m (6560ft) ASL

1.3 POWER SUPPLY

Line Power

Installation Category II; 85264Vrms, 45 to 65Hz, 40VA max. Internally fused with a nonuser serviceable fuse

2 ELECTRICAL CHANNEL INPUT AND ACCURACY SPECIFICATIONS

Note: All percentages are % of reading unless otherwise described.

2.1 INPUT ISOLATION SPECIFICATIONS

Valid for any V terminal to PXe2640 chassis ground; any A terminal to PXe2640 chassis ground; and between any V and any A terminal.

Impedance

>1GΩ II <30pF

Max. Voltage

4500VP< max without damage
2500V”MS max for <1s without damage
1OOOV”MS max continuous rated working voltage (CAT I/
II) 600VRMs max continuous rated working voltage (CAT
Ill) 300VRMs max continuous rated working voltage (CAT
IV)

2.2 VOLTAGE MEASUR EMENT 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


<3000V_{RMS} and V_{PK}

<500V_{RMS} and 3000V_{PK}

<3000V_{RMS} and V_{PK}

<2000V_{RMS}

<300V_{RMS}

<1500V_{RMS}

<1500V_{RMS}

<250V_{RMS}

<1000V_{RMS}

<1000V_{RMS}

<160V_{RMS}

<650V_{RMS}

As above

Measurable Voltacie Rancie

Unpowered


<1803V_{RMS} and V_{PK}

<182.3V_{RMS} and V_{PK}

<1803_{RMS} and V_{PK}

Specified Voltacie Rancie

<1OOOV_{RMS} and <1750V_{PK}

<160V_{RMS} and <175V_{PK}

<65OV_{RMS} and <1750V_{PK}

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, AV IONICS, and 50kHz throughout a 1V to 1000V range of applied voltages expressed as % of reading and are va lid within ±5C of the ca libration temperature (add 0.005% per C beyond this) and where no significant commonmode 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, PeakValley).

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

10k40kHz

40k100kHz

100k1MHz

>1MHz


None

0.005%

None

0.01%

0.05%

F*0.005%

F*0.002%

0.05%+(F10)*0.012%

0.41 %+1F40\*0.025 %

0.08 %+1F40\*0.004 %

Typically (F/1000)2*100%

0.32 %+(F100)*0.013%

Not specified

Typically (F/3500)2*100%

SelfHeating Scaling Error
Apply to all results (only significant at higher voltaaesl 1 minute nominal time constant

0.05%*(V_{AC+DC}/ 1000)^{2}

0.5 %*(V_{AC+DC}/1000)^{2}

0.15 %*(V_{AC+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 usina USER bandwidth settina

10%*(F/F_{BW})^{2}, unspecified for F > 0.3*F_{BW}

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 V_{DC}/V_{AC+DC}

3mV

1mV

100µV

5mV

AC Floor Error
Apply to AC, AC+DC, and RECTIFIED results

MAINS. LF. VLF & F_{BW}<10kHz

AVIONICS & F_{BW}<50kHz

Otherwise


100µV/V_{RDG}

100µV/V_{RDG}

4µV/V_{RDG}

200µV/V_{RDG}

300µV/V_{RDG}

300µV/V_{RDG}

8µV/V_{RDG}

650µV/V_{RDG}

1.1mV/V_{RDG}

1.1mV/V_{RDG}

11µV/V_{RDG}

1.5mV/V_{RDG}

Peak Floor Error
Apply to PK, VLY and PKVLY results

MAINS. LF. VLF & F_{BW}<10kHz

AVIONICS & F_{BW}<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 commonmode voltage

1µV per V.Hz
(11.5mV@230V/50Hz)

1OOnV 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)/V_{AC}

Form Factor Error

(fatal Flaar Error from preceding table for AC+DC results)/V_{RECTIFIED}

InterChannel Error
For 120° between equal amplitudes

(Relevant Voltage Errors from preceding table at the interchannel voltage) + 0.0015%*F

Harmonic or Spectrum Error


<10kHz

10k115kHz

115k435kHz


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 V_{AC+DC}

0.006% of V_{AC+DC}

0.015% of V_{AC+DC}

0.05% of V_{AC+DC}

0.03% of V_{AC+DC}

Not Available

0.08% of V_{AC+DC}

InterChannel Fundamental Phase Error

0.02°+0.15°*F

0.01°+0.07°*F

HarmonicFundamental Phase Error (typical, BANDWIDTH configured as UNFILTERED)

0.02°+0.1°*F+0.001°*H

0.02°+0.03°*F+0.001°*H

%THO Error Errors shown are all expressed in % THD units


<10kHz

10k115kHz

115k435kHz


(0.005+0.000025*N)*% THD+0.00005*N*✓N
+ from below usina the frequency of highest included harmonic

0.025+ 1.25/V_{AC}

0.015+1/V_{AC}

0.015+0.2/

0.03+ 1.5/V_{AC}

V_{AC} 0.15+3.5/V_{AC}

0.15

0.06+ 4/V_{AC}

+0.35/V_{AC} Not Available

0.15+4/V_{AC}


2.3 CURRENT MEASUREMENT SPECIFICATIONS

2.3.1 CURRENT INPUT CAPABILITY AND CHARACTERISTICS

Specification

Channal Type

Option H

Option D HI Range or AutoRange when on HI Range

Option D LO Range or AutoRange when on LO Range

Option X HI Range

Option X LO Range

No Damage Current Range

<8ms

<40ms

<1s

Continuous

XT2640 Unpowered


All

<200A_{RMS} and <300A_{PK}

<150A_{RMS} and <250A_{PK}

<60A_{RMS} and <150A_{PK}

<200V_{RMS} and <300V_{PK}

<20V_{RMS} and <30V_{PK}

All

<75A_{RMS}

<50A_{RMS}

<40A_{RMS}

<50V_{RMS}

<10V_{RMS}

All

<50A_{RMS}

<30A_{RMS}

<5A_{RMS}

<30V_{RMS}

<5V_{RMS}

All

<30A_{RMS}

<20A_{RMS}

<2A_{RMS}

<25V_{RMS} and V_{PK}

<5V_{RMS} and V_{PK}

All

As Above

<2V_{RMS} and <150V_{PK}

<25V_{RMS} and <300V_{PK}

Measurable current Range

All

<225A_{RMS} and A_{PK}

<150A_{RMS} and A_{PK}

<1.02A_{RMS} and A_{PK}

<23.1V_{RMS} and V_{PK}

<0.576V_{RMS} and V_{PK}

Specified Current Range

All

<30A_{RMS} and <200A_{PK}

<20A_{RMS} and <140A_{PK}

<1A_{RMS} and A_{PK}

<15V_{RMS} and <20V_{PK}

<0.55V_{RMS} and V_{PK}

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, MA INS, AV IONICS, and 50kHz throughout a 1OOµA 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 commonmode 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, PeakValley).

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

10k40kHz

40k100kHz

100k1MHz

>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%+(F10)*0.007%

W

F*0.0015%

S,A or L

0.24%+(F40)*0. 02%

W

0.06%+(F40)*0.003%

0.06 %+(F40)*0 .004%

S,A or L

Typically (F/ 1250)2*100%

W

0.24%+(F100)*0.012%

0.3%+(F100)*0. 015%

W

Typically (F/5000)2*100%

Typically (F/3000)2*100%

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

All

0.00015%*A_{AC+DC}^{2}

0.0002%*A_{AC+DC}^{2}

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 usina USER bandwidth setting

All

10%*(F F_{BW})^{2}, unspecified above 0.3*F_{BW}

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 V_{DC}/V_{AC+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 & F_{BW}<10kHz

AVIONICS & F_{BW}<50kHz

Otherwise


S,A or L

3.3µA/A_{RDG}

1.5µA/A_{RDG}

90pA/A_{RDG}

35nV/A_{RDG}

20pV/A_{RDG}

W

5µA/A_{RDG}

2.5µA/A_{RDG}

125pA/A_{RDG}

50nV/A_{RDG}

50pV/A_{RDG}

S,A or L

33µA/A_{RDG}

15µA/A_{RDG}

0.9nA/A_{RDG}

350nV/A_{RDG}

200pV/A_{RDG}

W

50µA/A_{RDG}

25µA/A_{RDG}

1.25nA/A_{RDG}

500nV/A_{RDG}

500pV/A_{RDG}

S,A or L

330µA/A_{RDG}

150µA/A_{RDG}

9nA/A_{RDG}

3.5µV/A_{RDG}

200nV/A_{RDG}

W

500µA/A_{RDG}

250µA/A_{RDG}

12.5nA/A_{RDG}

5µV/A_{RDG}

5nV/A_{RDG}

Peak Floor Error
Apply to PK, VLY and PKVLY results

MAINS. LF. VLF & F_{BW}<10kHz

AVIONICS & F_{BW}<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 commonmode 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)/A_{AC}

Form Factor Error

All

(Total Current Floor Error from preceding table for AC+DC results)/A_{RECTIFIED}

MultiChannel Error
For similar current level and phase in each phase.

A_{N} (2θ3w)

A_{θC} (3θ3w 2ch)

A_{N} (3θ4w)


All

Relevant Current Errors from preceding table for A_{θA}
+ Relevant Current Errors from preceding table for
A_{θB} + 0.0005% of (A_{θA} + A_{θB})*F

All

Relevant Current Errors from preceding table for A_{θA}
+ Relevant Current Errors from preceding table for
A_{θB} + 0.0015% of (A_{θA} + A_{θB})*F

All

Relevant Current Errors from preceding table for A_{θA}
+ Relevant Current Errors from preceding table for
A_{θB} + Relevant Current Errors from preceding table
for A_{θC} + 0.0015% of (A_{θA} + A_{θB} + A_{θC})*F

Harmonic or Spectrum Error


<10kHz

10k115kHz

<10kHz

10k115kHz

<10kHz

10k115kHz

115k435kHz


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 A_{AC+DC}

0.05% of A_{AC+DC}

S

0.01% of A_{AC+DC}

0.05% of A_{AC+DC}

W

0.015% of A_{AC+DC}

0.03% of A_{AC+DC}

0.08% of A_{AC+DC}

Current· Voltage
Fundamental Phase Error

S, A or L

0.005° + 0.015°*F

W

0.005° + 0.007°*F

HarmonicFundamental 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

%THO Error Errors shown are all expressed in %THO units.


<10kHz

10k115kHz

<10kHz

10k115kHz

<10kHz

10k115kHz

115k435kHz


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/A_{AC}

0.015+0.15/A_{AC}

0.015+0.001/A_{AC}

0.015+0.025/A_{AC}

0.015+0.0006/A_{AC}

0.15+2/A_{AC}

0.15+1.5/A_{AC}

0.15+0.01/A_{AC}

0.15+0.25/A_{AC}

0.15+0.006/A_{AC}

S

0.025+0.2/A_{AC}

0.025+0.15/A_{AC}

0.025+0.001/A_{AC}

0.025+0.025/A_{AC}

0.025+0.0006/A_{AC}

0.15+2/A_{AC}

0.15+1.5/A_{AC}

0.15+0.01/A_{AC}

0.15+0.25/A_{AC}

0.15+0.006/A_{AC}

W

0.03+0.25/A_{AC}

0.03+0.18/A_{AC}

0.03+0.0012/A_{AC}

0.03+0.03/A_{AC}

0.03+0.001/A_{AC}

0.06+2 .5/A_{AC}

0.06+1.8/A_{AC}

0.06+0.012 /A_{AC}

0.06+0.3/A_{AC}

0.06+0.01/A_{AC}

0.15+2.5/A_{AC}

0.15+1.8/A_{AC}

0.15+0.012/A_{AC}

0.15+0.3/A_{AC}

0.15+0.01/A_{AC}


2.4 WATTS, VAR AND VA MEASUREMENT SPECIFICATIONS

The charts below show guaranteed maximum Watts errors for DC, MAINS, AV IONICS, and 50kHz from 1OOµW up to the highest available using a D option current measurement (H and X option current accuracies are similar within their respective range of currents and are not shown for clarity), expressed as % of Watts reading and are va lid within ±5C of the calibration temperature (add 0.005% per C beyond this) and where no significant commonmode 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

2.4.1 WATIS, VAR AND VA MEASUREMENT SPECIFICATIONS

2.4.1.1 PRIMARY WATIS, 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 alI 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

10k40kHz

40k100kHz

100k1MHz

>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%+(F10)*0.0014%

W

F*0.0025%

S,A or L

0.48%+(F40)*0.032%

W

0.01%+(F40)*0.005%

0.01%+(F40)*0.0055%

S,A or L

Typically (F/1100)^{2}*150%

W

0.4%+(F100)*0.018%

0.43%+(F100)*0.02%

W

Typically (F/5000)^{2}*150%

Typically (F/3000)^{2}*150%

SelfHeating Scaling Error
Apply as % of Power reading to all results using voltage and current Self Heating Errors from orevious tables

All

Add Voltage and Current SelfHeating Errors

Temperature Scaling Error
Apply to all results if outside of ±5C from calibration tempperature

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/F_{BW})^{2}, unspecified above 0.3*F_{BW}

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

(V_{AC+DC}*56µA) + (A_{AC+DC}*45µV)

(V_{AC+DC}*38µA) + (A_{AC+DC}*45µV)

(V_{AC+DC}*250nA) + (A_{AC+DC}*45µV)

(V_{AC+DC}*6µA) + (A_{AC+DC}*45µV)

(V_{AC+DC}*0.15µA) + (A_{AC+DC}*45µV)

A

(V_{AC+DC}*56µA) + (A_{AC+DC}*450µV)

(V_{AC+DC}*38µA) + (A_{AC+DC}*450µV)

(V_{AC+DC}*250nA) + (A_{AC+DC}*450µV)

(V_{AC+DC}*6µA) + (A_{AC+DC}*450µV)

(V_{AC+DC}*0.15µA) + (A_{AC+DC}*450µV)

S or W

(V_{AC+DC}*225µA) + (A_{AC+DC}*1.8mV)

(V_{AC+DC}*150µA) + (A_{AC+DC}*1.8mV)

(V_{AC+DC}*1µA) + (A_{AC+DC}*1.8mV)

(V_{AC+DC}*23µA) + (A_{AC+DC}*1.8mV)

(V_{AC+DC}*0.6µA) + (A_{AC+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

(V_{DC}*Current DC Floor Error) + (A_{DC}*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

(V_{AC}*Current AC Floor Error) + (A_{AC}*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

(V_{AC}*Current Common Mode Error) + (A_{AC}*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

(A_{AC}*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

(V_{AC}*Current Adjacent Channel Error) + (A_{AC}*Voltage Adjacent Channel Error)

Phase Floor Error (Watts only) Apply to AC and AC+DC Watts results

s, A or L

VA_{FUND}*(PF_{FUND} – cos(cos^{1}(PF_{FUND}) + 0.015 F))
Alternately, as a worst case (at PF=O) this can expressed as F*0.028% of VA

W

VA_{FUND}*(PF_{FUND} – cos(cos^{1}(PF_{FUND}) + 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

10k115kHz

<10kHz

10k115kHz

<10kHz

10k115kHz

115k435kHz


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 tor 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/A_{AC+DC}) + (45µV/V_{AC+DC})

(38µA/A_{AC+DC}) + (45µV/V_{AC+DC})

(250nA/A_{AC+DC}) + (45µV/V_{AC+DC})

(6µA/A_{AC+DC}) + (45µV/V_{AC+DC})

(0.15µA/A_{AC+DC}) + (45µV/V_{AC+DC})

A

(56µA/A_{AC+DC}) + (450µV/V_{AC+DC})

(38µA/A_{AC+DC}) + (450µV/V_{AC+DC})

(250nA/A_{AC+DC}) + (450µV/V_{AC+DC})

(6µA/A_{AC+DC}) + (450µV/V_{AC+DC})

(0.15µA/A_{AC+DC}) + (450µV/V_{AC+DC})

S or W

(225µA/A_{AC+DC}) + (1.8mV/V_{AC+DC})

(150µA/A_{AC+DC}) + (1.8mV/V_{AC+DC})

(1µA/A_{AC+DC}) + (1.8mV/V_{AC+DC})

(23µA/A_{AC+DC}) + (1.8mV/V_{AC+DC})

(0.6µA/A_{AC+DC}) + (1.8mV/V_{AC+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

PF_{RDG}*((Current AC Floor Error/A_{RDG}) + (Voltage AC Floor Error/V_{RDG}))

DC Floor Error Apply to AC+DC PF result after multiplying by (1PF)

L

(0.23mA/A_{AC+DC}) + (0.1mV/V_{AC+DC})

(0.15mA/A_{AC+DC}) + (0.1mV/V_{AC+DC})

(1µA/A_{AC+DC}) + (0.1mV/V_{AC+DC})

(40µA/A_{AC+DC}) + (0.1mV/V_{AC+DC})

(5µA/A_{AC+DC}) + (0.1mV/V_{AC+DC})

A

(0.23mA/A_{AC+DC}) + (1mV/V_{AC+DC})

(0.15mA/A_{AC+DC}) + (1mV/V_{AC+DC})

(1µA/A_{AC+DC}) + (1mV/V_{AC+DC})

(40µA/A_{AC+DC}) + (1mV/V_{AC+DC})

(5µA/A_{AC+DC}) + (1mV/V_{AC+DC})

S

(0.45mA/A_{AC+DC}) + (3mV/V_{AC+DC})

(0.3mA/A_{AC+DC}) + (3mV/V_{AC+DC})

(2µA/A_{AC+DC}) + (3mV/V_{AC+DC})

(80µA/A_{AC+DC}) + (3mV/V_{AC+DC})

(6µA/A_{AC+DC}) + (3mV/V_{AC+DC})

W

(0.68mA/A_{AC+DC}) + (5mV/V_{AC+DC})

(0.45mA/A_{AC+DC}) + (5mV/V_{AC+DC})

(3µA/A_{AC+DC}) + (5mV/V_{AC+DC})

(120µA/A_{AC+DC}) + (5mV/V_{AC+DC})

(8µA/A_{AC+DC}) + (5mV/V_{AC+DC})

Phase Error Apply to all PF results

S, A or L

(PF_{FUND} – cos(cos^{1}(PF_{FUND}) ± 0.015°*F))
Alternately, as a worst case (at PF=O) this can expressed as F*0.00028

W

(PF_{FUND} – cos(cos^{1}(PF_{FUND}) ± 0.007°*F))
Alternately, as a worst case (at PF=O) this can expressed as F*0.00013


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% + lms maximum error

Maximum Data

{0.01% + 1ms) (not for integrated average data) {0.03/measurement period in seconds)% per year error

4.2 HARMON IC 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) 500^{th} (harmonic over the 100^{th}, 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/Ham ionic Bandwidth)

Period Update Internal

Nominally the greater of –
a) LF/PERIOD measurement period
b) Ham ionic 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 nonfundamental ham ionic 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

2.6 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 (HIrange) 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/
PEROD setting of LF:greater of 1/1/5s or 1 cycle LF/
PEROD setting of 300ms period: 0.25s/O.75s/2s LF/PEROD setting of 100ms period: 55ms/250ms/1s LF/PEROD setting of 20ms period: 25ms/200ms/700ms LF/ PERIOD setting of 1Oms period: 1Oms/l00ms/300ms LF/PEROD 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 amp litude periods
b) 2 frequency measurement periods
c) 4 cycles of the signal

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 (Tarque):BNC(isolated from XT2640 chassis), configurable as analog or digital input DIR (Direction) : BNC (isolated from XT2640 chassis), digital input

Input CommonMode

Up to15V_{PK} to + 15V_{PK} specified
Up to30V_{PK} to + 30V_{PK} with no damage

Analog Input Range

Up to12V_{DC} to + 12V_{DC} specified
Up to15V_{PK} to + 15V_{PK} specified
Up to30V_{PK} to + 30V_{PK} with no damage

Digital Input Range

LO:<0.5V (nominal)
HI:>2V (nominal)
Up to30V_{PK} to + 30V_{PK} 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 bestable 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

1/512^{th} 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)

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/ type channels) or 4.1µs
(otherwise) 0.03% of timebase setting

Maximum Error

As Voltage and Current Specifications for PK data 011/atts = multiplication of V and A waveforms)

4.6 HISTORICAL DATA COLLECTION SPECIFICATIONS

Collection Time

Automatically continuously variable between 1 measurement period and 584.5 million 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) nonvolatile 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 nonaccumulating error
