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GW Instek GPM-8310 - Digital Power Meter with RS-232C / USB device & host / LAN / GPIB and opt. DA4

Digital Power Meter with RS-232C / USB device & host / LAN / GPIB and opt. DA4

GW Instek

Category : AC Power Meter

$1,499 (USD) Add to Cart

Documents:
Brochure

Overview
Features
Information
Calibration

GW Instek GPM-8310 is a digital power meter for single-phase (1P/2W) AC power measurement. Features include DC, 0.1Hz~100kHz test bandwidth, 16bits A/D, and 300 kHz sampling rate. It adopts a 5” TFT LCD screen with a five-digit measurement display and provides 25 power measurement related parameters, and has a high-precision measurement capability. It also features the ability to display waveform (voltage/current/power), the integration measurement function, harmonic measurement and analysis of each order (meeting the IEC 61000-4-7 harmonics measurement requirements at 50/60Hz), external sensor input terminals, and various communication interfaces, etc., to help users achieve clear, convenient and accurate power measurements. This power meter is the most cost-effective power meter with the most complete functionalities among the products of the same category.

The rated direct input voltage of GPM-8310 is 600V and the input current is 20A. The minimum current level is 5mA (resolution up to 0.1uA) and the power measurement resolution is 0.1uW. The crest factor can reach 3 (half measurement range can reach 6 or 6A), and the voltage/current/power measurement capability can reach (±0.05% reading ±0.1% level). Different measurement modes can be selected according to ( AC+DC/ AC/ DC/ V-MEAN), providing up to 25 relevant parameters for power measurement, including voltage (Vrms/ Vac/ Vdc/ Vmn/ V+pk / V-pk), current (Irms/ Iac/ Idc/ I+pk/ I-pk), frequency (VHz/ IHz), power (P/ P+pk/ P-pk), crest factor (CFV/ CFI), apparent power (VA), reactive power (VAR), power factor (PF), phase angle (DEG), total harmonic distortion rate (THDV/THDI), maximum current ratio (MCR), and the MATH calculation function. Hence, for the measurement of low current/low power such as standby power consumption, or the measurement of power consumption of general products, this power meter provides the best range and accuracy support.

GPM-8310 also makes good use of the advantages of the TFT LCD to display the results of parameter measurement by using numerical and graphical methods. In terms of numerical values, the general mode  and the simple mode are provided. The general mode can display 10 measurement parameters (2 main measurements + 8 monitoring measurements), and the simple mode  can display four measurement parameters. These displayed parameters can be arbitrarily selected from 25 power parameters according to the needs of users. In terms of graphic display, a simple oscilloscope mode is provided to display waveforms for three parameters including voltage, current, and power. In addition, the measurement and analysis of each harmonic order of the measurement signal can be completely displayed by numerical values or bar graphs. This power meter not only meets the needs of accuracy and legibility in-process testing but also meets the needs of diverse measurement applications in R&D design and quality verification.

In addition, the performance of GPM-8310 in auxiliary measurement mechanism/function is also comprehensive. For the application of measuring large voltage, the VT rate setting can be used with an external voltage Potential Transformer. For the measurement of large current, the type of current transformer ~ voltage output type or current output type will determine the applied method. If it is a current output type, it can be directly locked to the rear panel of the instrument and collocated with the CT rate setting to conduct measurement. If it is a voltage output type, the measurement can be conducted through the external current sensor input terminals (EXT1/EXT2) provided by GPM-8310. Automatic level-changing can self-define the required level to save a level-changing time. 10,000 lots of internal memories can be used to store measurement data according to the update rate set by GPM-8310 or a user-defined time interval for subsequent analysis.

In terms of data retrieval and storage, GPM-8310 provides a variety of communication interfaces including RS-232C/ USB device (virtual COM)/ LAN/ GPIB. Users can write programs to read the measurement results according to their habits or with existing system interfaces and there is no need to procure interfaces. USB host supports GPM-8310 screen capture, internal record data access, and firmware update. For the needs of external signal control or the use of data recorder to record data, GPM-8310 also provides an optional Digital I/O (DA4) interface (must be installed before leaving the factory), which can be connected to an external controller such as PLC or a data recorder to meet the application of automatic measurement or long recording.

 

Various Display Modes


Numerical (General) Mode

Numerical (Simple) Mode

Waveform Mode

Harmonic (Bar Graph) Measurement

Harmonic (Table Column) Measurement

GPM-8310 provides the numerical value display mode and the waveform display mode, which help users to maximize the benefit of their measurement. Under the numerical mode, there are the general mode and the simple mode. The general mode has related measurement settings and can simultaneously display 10 measurement parameters (2 main measurements and 8 secondary measurements). The simple mode displays only 4 measurement parameter results. The parameters in each mode can be arranged and combined as required. Under the graphic mode, a simple oscilloscope function is provided to display the waveforms of three parameters including voltage, current, and power. The horizontal scale can be adjusted (from 25us/div ~ 1s/div according to the set data update rate), and 3 magnification rates for waveform observation are also provided for users to select. In the harmonic measurement, the measurement results of each order of harmonics can be displayed by bar graphs, and a specific observation order can be specified. The relevant values of each order of harmonics (voltage/current/power/voltage distortion ratio/current distortion ratio/power distortion ratio/voltage phase angle/current phase angle) can be completely recorded and displayed.

 

Rich Measurement Parameters

Measurement Items Symbols
Voltage Vrms, V+pk, V-pk, Vac*, Vdc*, Vmn
Current Irms, I+pk, I-pk, Iac*, Idc*
Power P, P+pk, P-pk, VA, VAR
Power Factor PF
Crest Factor CFV, CFI
Phase Angle DEG
Frequency VHz, IHz
Total Harmonic Distortion THDV, THDI
Maximum Current Ratio MCR
Integration WP, WP+, WP-, q, q+, q-, Vac, Iac

Note : “*” Only applicable to specific measurement modes for selection

GPM-8310 provides a variety of measurement items and functions, including voltage, current, frequency, effective power, apparent power, reactive power, power factor, crest factor, total harmonic distortion, and can also measure the maximum current ratio. GPM-8310 is also equipped with the measurement function of power or current time integration for the DUT. Users set a period of time to perform instantaneous power With respect to the support of measurement assistance, the performance of GPM-8310 is outstanding. First of all, for the measurement of high voltage/high power, the setting of voltage ratio/power ratio is provided to restore the attenuated ratio to a true value. For the measurement of large current, other than the setting of current ratio, external current sensor terminals (EXT1/EXT2) can be utilized to connect with a voltage output type current transformer, making large current measurement more GPM-8310 provides the measurement of the integration function under the automatic level-changing mode to allow users to fully calculate the total value of the power consumption of the DUT from the beginning to the end of the integration function. In addition, GPM-8310 also supports integration at the set time period, and then divide by the time to obtain the average power of the DUT. In addition, when performing integration measurement, GPM-8310 supports an automatic level-changing function for the power change of the DUT at different times in order to obtain the most complete integration result within the set time.

 

Superb Measurement Assistance


Ratio Configuration

External Current Sensor Input

With respect to the support of measurement assistance, the performance of GPM-8310 is outstanding. First of all, for the measurement of high voltage/high power, the setting of voltage ratio/power ratio is provided to restore the attenuated ratio to a true value. For the measurement of large current, other than the setting of current ratio, external current sensor terminals (EXT1/EXT2) can be utilized to connect with a voltage output type current transformer, making large current measurement more convenient. In addition, GPM-8310 provides 4 sets of panel settings for storage/recall and memory for storing 10,000 lots of measurement values. The measurement storage can log the measurement results based upon the update rate or a self-defined time interval to facilitate the subsequent analysis. The USB host on the front panel supports screen capture, measurement value storage, and GPM-8310 firmware update.

 

Flexible Level-Changing Mechanism


Automatic level-changing under the integration function

Self-defined automatic level-changing mechanism

GPM-8310 provides the measurement of the integration function under the automatic level-changing mode to allow users to fully calculate the total value of the power consumption of the DUT from the beginning to the end of the integration function. In addition, GPM-8310 also supports a self-defined setting mechanism for level-changing. Users can select the required level to be changed to save time on level-changing and expedite the test.

 

Convenient and Practical Interface


Practical Interface

DA4 Interface Mechanism

GPM-8310 provides comprehensive and diverse communications interfaces including RS-232 / USB / LAN / GPIB, which are suitable for customers to write computer software for remote control and the collection of measurement results through commands. The optional Digital I/O (DA4) interface provides 3 different modes: the external control mode, the DA4 output mode, and the self-defined output mode based on user settings. When the setting is in the external control mode, it allows users to activate, stop, trigger or reset the integration measurement function through external signals. When the setting is in the DA4 output mode, users can define 4 measurement parameter values from the 25 measurement parameters provided (even with the result of integration measurement) to produce outputs by a fixed level (full scale +5V) or a manual level (full scale ±5V) and receive results by collocating with a data recorder. When the setting is in the self-defined output mode, a communications interface is required to control the action of each defined pin through commands.

 

Pannel Introduction

GW Instek GPM-8310 - Digital Power Meter with RS-232C / USB device & host / LAN / GPIB and opt. DA4
  • 5” TFT LCD
  • DC, 0.1Hz ~ 100kHz voltage/current test bandwidth
  • Two numerical display modes: General mode: displays 2 main test items + 8 secondary test items; Simple mode: displays the test values of 4 main test items
  • Waveform display: V (voltage), I (current), P (power)
  • The current/voltage can be measured to a deformed wave with CF of 3, and the half-range CF can reach 6 or 6A
  • 50th order of harmonic measurement and analysis (value and bar graph)
  • The integration function supports automatic level-changing
  • External current sensor input terminals (EXT1/EXT2)
  • Standard interfaces: RS-232C, USB device/ host, LAN, GPIB
  • Optional interface: Digital I/O (DA4) (must be installed before leaving the factory)
  • Optional accessory: GPM-001

 

Input

Input Type
VoltageFloating input through resistive voltage divider
CurrentFloating input through shunt
Measure range
Voltage15V, 30V, 60V, 150V, 300V, 600V
Current
Direct input5mA, 10mA, 20mA, 50mA, 100mA, 200mA, 0.5A, 1A, 2A, 5A, 10A, 20A
Sensor inputEXT1: 2.5 V, 5 V, 10 V
EXT2: 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V
Input Impedance
VoltageInput resistance: approach 2 MΩ
Current
Direct input range 5mA ~ 200mAInput resistance: approach 505 mΩ
Direct input range 0.5A ~ 20A Input resistance: approach 5 mΩ
Sensor Input
Input range 2.5V ~ 10V (EXT1)Input resistance: approach 100 kΩ
Input range 50mV ~ 2V (EXT2) Input resistance: approach 20 kΩ
Continuous maximum allowable input
Voltagepeak value of 1.5kV or RMS value of 1kV, whichever is less
Current
Direct input range 5mA ~ 200mA peak value of 30 A or RMS value of 20A, whichever is less
Direct input range 0.5A ~ 20A peak value of 100A or RMS value of 30A, whichever is less
Sensor inputpeak value less than or equal to 5 times of the rated range
Input bandwidthDC, 0.1 Hz ~ 100kHz
Continuous maximum Common-mode voltage600 Vrms, CAT Ⅱ
Line filterselect OFF or ON (cut off frequency of 500 Hz)
Frequency filterselect OFF or ON (cut off frequency of 500 Hz)
A/D converterSimultaneous conversion voltage and current inputs
Resolution 16bits
Maximum conversion rate Approx. 300kHz

 

Voltage and Current Accuracy

Requirements
Temperature23 ± 5℃
Humidity30~75% RH
Input waveformSine wave crest factor = 3
common-mode voltage0V
Number of Displayed Digits5 Digits
Frequency FilterTurn on to Measure Voltage or Current of 200Hz or Less

After 30 minutes after warm-up time has passed
After measurement range is changed (zero-level compensation)
Update interval is 250 ms

Accuracy
DC± (0.1% of reading + 0.2% of range)
0.1 Hz ≤ f<45 Hz± (0.1 % of reading + 0.2 % of range)
45 Hz ≤ f ≤ 66 Hz± (0.1 % of reading + 0.05 % of range)
66 Hz<f ≤ 1 kHz± (0.1 % of reading + 0.2 % of range)
1 kHz<f ≤ 10 kHz ± (0.07 *f) % of reading + 0.3% of range)
10 kHz<f ≤ 100 kHz± (0.5 % of reading + 0.5 % of range) ± [{0.04x(f-10)}% of reading]
Temperature coefficient
Add±0.03% of reading/°C within the range 5 to 18°C or 28 to 40°C.
When the line filter is turned ON
45 ~ 66 HzAdd 0.2 % of reading
< 45 HzAdd 0.5 % of reading
Accuracy when the crest factor is set to 6 or 6Aaccuracy obtained by doubling the measurement range error for the accuracy when the crest factor is set to 3
Accuracy changes caused by data update intervalWhen the data update interval is 100 ms, and Auto, add 0.05% of reading to the 0.1 Hz to 1 kHz accuracy.
Influence of Temperature Changes After Zero-Level Compensation or Range Change
5 mA/10 mA/20 mA/50 mA/100 mA/200 mA ranges5 µA/°C
0.5 A/1 A/2 A/5 A/10 A/20 A ranges500 µA/°C
External current sensor input (/EXT1) 1 mV/°C
External current sensor input (/EXT2)50 µV/°C

Add 0.02% of range/°C to the DC voltage accuracy.
Add the following value to the DC current accuracies.

 

Active Power Accuracy

Requirementssame at the conditions for voltage and current
Power factor
Accuracy
DC(0.1 % of reading + 0.2 % of range)
0.1Hz ≤ f<45 Hz± (0.3 % of reading + 0.2 % of range)
45 Hz ≤ f ≤ 66 Hz± (0.1 % of reading + 0.05 % of range)
66 Hz<f ≤ 1kHz± (0.2 % of reading + 0.2 % of range)
1 kHz<f ≤ 10 kHz± (0.1 % of reading + 0.3 % of range) ± [{0.067x(f-1)}% of reading]
10 kHz<f ≤ 100 kHz ± (0.5 % of reading + 0.5 % of range) ± [{0.09x(f-10)}% of reading]
When the Line Filter is Turned ON
45 ~ 66 HzAdd 0.3 % of reading
< 45 HzAdd 1 % of reading
Temperature coefficientsame as the temperature coefficient for voltage and current
Accuracy when the crest factor is set to 6 or 6Aaccuracy obtained by doubling the measurement range error for the accuracy when the crest factor is set to 3
Accuracy of apparent power Svoltage accuracy + current accuracy
Accuracy of reactive power Qaccuracy of apparent power + (√1.0004 - λ2) - (√1 - λ2) ×100 %
Accuracy of power factor λ± [(λ-λ/1.0002)+丨 cosø-cos{ø+sin-1 (influence from the power factor when λ = 0%/100)}丨] ±1 digit when voltage and current are at the measurement range rated input
Accuracy of phase difference Φ± [丨 ø-cos-1(λ/1.0002)丨+ sin-1 (influence from the power factor when λ = 0 % / 100)] ± 1 digit when voltage and current are at the measurement range rated input
Accuracy changes caused by data update intervalWhen the data update interval is 100 ms, and Auto, add 0.05% of reading to the 0.1 Hz to 1 kHz accuracy.
Influence of Power FactorWhen power factor (λ) = 0 (S: apparent power)
± 0.1 % of S for 45 Hz ≤ f ≤ 66 Hz
± {(0.1 + 0.15 × f) % of S } for up to 100 kHz as reference data
•f is frequency of input signal in kHz
when 0 < λ < 1 (Φ: phase angle of the Voltage and current)
(power reading ) × [(power reading error%) + (power range %) × (power range / indicated apparent power value) + {tanΦ × (influence when λ=o)%}]

 

Voltage, Current and Active Power Measurements

Measurement methodDigital sampling method
Crest factor3 or 6 (6A)
Wiring SystemSingle-Phase, Two-Wire (1 P2 W)
Range SelectSelect Manual or Auto Ranging
Auto range
Auto-Range Increase
The range is upped when any of the following conditions is met.
Crest factor 3Urms or Irms exceeds 130% of the currently set measurement range. Upk, Ipk value of the input signal exceeds 300% of the currently set measurement range.
Crest factor 6Urms or Irms exceeds 130% of the currently set measurement range. Upk, Ipk value of the input signal exceeds 600% of the currently set measurement range.
Crest factor 6AUrms or Irms exceeds 260% of the currently set measurement range. Upk, Ipk value of the input signal exceeds 600% of the currently set measurement range.
Auto-Range Decline
The range is downed when all of the following conditions are met.
Crest factor 3 Urms or Irms is less than or equal to 30% of the measurement range. Urms or Irms is less than or equal to 125% of the next lower measurement range. Upk, Ipk value of the input signal exceeds 300% of the currently set measurement range.
Crest factor 6 or 6A Urms or Irms is less than or equal to 30% of the measurement range. Urms or Irms is less than or equal to 125% of the next lower measurement range. Upk, Ipk value of the input signal exceeds 600% of the currently set measurement range.
Display Mode SwitchingVrms (the true RMS value of voltage and current)
VOLTAGE MEAN (the rectified mean value calibrated to the RMS value of the voltage and the true RMS value of the current)
AC
DC
Measurement synchronization sourceSelect voltage, current, or off
In the case of Auto Update Rate, select the voltage or current from the equipped element.
Line filterSelect OFF or ON (cutoff frequency at 500 Hz).
Peak measurementMeasures the peak (max, min) value of voltage, current or power from the instantaneous voltage, instantaneous current or instantaneous power that is sampled.
Zero-level compensationRemoves the internal offset of the measure unit (After measurement range is changed)
Measurement Parameters
VoltageVrms , Vmn, Vdc , Vac
CurrentIrms , Idc , Iac
Active PowerP
Apparent PowerVA
Reactive powerVAR
Power FactorPF
Crest FactorCFI, CFV
Phase AngleDEG
FrequencyIHz and VHz
Voltage PeakV+pk and V-pk
Current PeakI+pk and I-pk
Active Power Peak P+pk and P-pk
Total Harmonic DistortionTHDI and THDV
Maximum Current RatioMCR

 

Frequency Measurement

Measurement Frequency Range (Data Update Interval : Measurement Frequency Range)
0.1 s 20 Hz ≤ f ≤ 100 kHz
0.25 s10 Hz ≤ f ≤ 100 kHz
0.5 s5 Hz ≤ f ≤ 100 kHz
1 s2.0 Hz ≤ f ≤ 100 kHz
2 s1.0 Hz ≤ f ≤ 100 kHz
5 s0.5 Hz ≤ f ≤ 100 kHz
10 s0.2 Hz ≤ f ≤ 100 kHz
20 s0.1 Hz ≤ f ≤ 100 kHz
Auto ( * )0.1 Hz ≤ f ≤ 100 kHz

( * ) Limit of the measurement lower limit frequency by the Timeout setting

Measurement Frequency Range (Timeout : Lower Limit Frequency)
1 s2.0 Hz
5 s0.5 Hz
10 s0.2 Hz
20 s0.1 Hz
Measurement RangeAuto switching among six types: 100mHz, 1 Hz, 10 Hz, 100 Hz, 1 kHz, 10 kHz, and 100 kHz.
Frequency FilterSelect OFF or ON (cut off frequency of 500 Hz)
Accuracy
RequirementsWhen the input signal level is 30% or more of the measurement range If the crest factor is set to 3.
(60% or more if the crest factor is set to 6 or 6A)
• Frequency filter is ON when measuring voltage or current of 200 Hz or less.

± (0.06% of reading)

 

Integration

ModeSelect manual integration mode, standard integration mode, or repetitive integration mode.
TimerAutomatically stop integration by setting a timer.
Selectable range: 0 hours 00 minutes 00 seconds to 9999 hours 59 minutes 59 seconds
Accuracy±(Power accuracy (or current accuracy) + 0.1% of reading) (fixed range)
Range SettingAuto Range or Fixed Range is Available for Integration
Timer Accuracy±0.02%
Remote controlStart, stop and reset operations are available using an external remote signal. (option)

 

Harmonic Measurement

Measured ItemVoltage, Current, Power
Measured MethodZero-Cross Simultaneous Calculation Method
Frequency Range10 Hz to 1.2 kHz.
FFT data length1024
4096 (Auto switch when both 50Hz/60Hz and update rate > 0.1s conditions are met)
Accuracy

*50Hz/60Hz Compliant IEC61000-4-7

 

D/A Output (options)

Output voltage±5 V FS (approach ±7.5 V maximum) against each rated value.
Number of output channels4
Output itemsSet for each channel : V, I, P, VA, VAR, PF, DEG, VHZ, IHZ, Vpk, Ipk, WP, WP±, q, q±, Off
Accuracy±(accuracy of each measurement item + 0.2% of FS) (FS = 5 V)
D/A conversion resolution16 bits
Minimum load100 kΩ
Update IntervalSame as the data update interval. In the case of Auto Update Rate, update interval is equal to signal interval. More than 100ms.
Temperature coefficient±0.05%/°C of FS

 

Remote Control Input/Output Signal (Options)

Remote Control Input SignalEXT HOLD, EXT TRIG, EXT START, EXT STOP, EXT RESET
Remote Control Output SignalINTEG BUSY
I/O LevelTTL
I/O Logic FormatNegative Logic, Falling Edge

 

Digital IO Signal (options)

I/O Control Output SignalOUT1, OUT2, OUT3, OUT4
I/O LevelTTL
I/O Sink CurrentMax 100mA (per/ch)

* Q (VAR), S (VA), λ (PF) and Φ (DEG) are originated from the measured values including voltage, current and active power which go through computation process. In respect to distorted signal input, accordingly, the value acquired from other instruments, which employ different methods, may differ from that acquired from GPM-8310 unit.
* “Zero” will be shown for S or Q and “--“ will be displayed for λ and Φ when either current or voltage is less than 0.5% of the rated range (less than or equivalent to 1% when crest factor is set 6).


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