Graphtec Instrument GL7000 Modules GL7-HSV.jpg

GL7-HV   High Voltage Module

High Voltage Input module records direct AC power line or DC power source up to 1000Vp-p.  Some application requires faster than 50/60Hz AC signal can also be recorded on the GL7-HV using the maximum 1MS/s (1µs) for laser, IR, and blue-ray signals that may encounter high voltage values.  There is more need to measure generator/inverter based system for automotive and aerospace market as well as electrical and heavy industrial equipment for performance quality and product longevity monitoring.  GL7-HV with its real-time RMS measurement capability allows true-RMS monitoring for manufacturing with investments in high priced heavy equipment.

Graphtec Instrument GL7000 Modules Measurements.gif

High withstand voltage (maximum input range 1000V)

Safe and reliable measurement of high maximum input voltage and  withstand voltage up to 2300VACrms for spikes up to 1 minute intervals with up to max 20 channels per one main GL7000 unit.

Input coupling (DC or AC)

By using the DC and AC coupling feature, voltage signal of a small AC signal superimposed on the input signal’s absolute voltage value can be measured and recorded.

RMS (effective value) measurement in real time

True-RMS effective values can be recorded for AC signals allowing trigger functions to be used for long term high voltage recording for starting the recording on a threshold level.

   
  
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    By measuring RMS data, you can use a smaller sampling interval to record all monitoring data.  This frees your memory capacity to record less amount coming from an AC signal.                                                                                                                                                                                                                                                                                                                          

By measuring RMS data, you can use a smaller sampling interval to record all monitoring data.  This frees your memory capacity to record less amount coming from an AC signal.                                                                                                                                                                                                                                                                                                                          

Application Examples

Graphtec Instrument GL7000 Modules GL7-HSV Application Examples.gif

GL7-HV Specification

Item Description
Type of module Voltage measurement module - High-voltage model -
Model number GL7-HV
Number of input channels 2 channels
Input method All channels isolated unbalanced input, Simultaneous sampling,
Isolated BNC connector
Sampling speed (interval) 1 M Samples/s to 1 Sample/h (1 μs to 1 hr.)
Built in RAM 2 million samples for each channel
Input coupling and measurement AC, DC, AC-RMS, DC-RMS
Measurement range DC, AC 2, 5, 10, 20, 50, 100, 200, 500, 1000 V Full Scale
DC-RMS, AC-RMS 1, 2, 5, 10, 20, 50, 100, 200, 500 Vrms Full Scale
(Crest Factor: up to 4 in 1 to 200 Vrms range, up to 2 in 500 Vrms range)
Measurement accuracy (*1) DC, AC ±0.25% of Full Scale
DC-RMS Sine wave measurement
±0.5% of Full Scale (at 20 Hz ≤ F ≤ 1 kHz)
±1.5% of Full Scale (at 1 kHz < F ≤ 20 kHz)
Response time: 500ms (Crest Factor is up to 4)
AC-RMS Sine wave measurement
±0.5% of Full Scale (at 100 Hz ≤ F ≤ 1 kHz)
±1.5% of Full Scale (at 1 kHz < F ≤ 20 kHz)
Response time: 500 ms (Crest Factor is up to 4)
A/D converter Successive Approximation type, 16 bits (effective resolution: 1/40000 of the measuring full range in the DC and AC coupling,
1/20000 of the measuring full range in the DC-RMS, AC-RMS coupling)
Input impedance 1 MΩ ±5%
Maximum input voltage Between (+)/(-) terminal 1000 Vp-p
Between channels ((-) terminals) 300 Vrms AC
Between channel/GND 300 Vrms AC
Max. voltage (withstand) Between channels 2300 Vrms AC (1 minute)
Between channel/GND 2300 Vrms AC (1 minute)
Isolation Between input/GND Min. 50 MΩ (at 500 V DC)
Common-mode rejection ratio Min. 90 dB (50/60 Hz, Signal source impedance: Max. 300 Ω)
Frequency response DC Coupling: DC to 200 kHz (+1/-3 dB)
AC Coupling: 4Hz to 200 kHz (+1/-4.5 dB)
Filter Low pass OFF, Line (1.5 Hz), 5, 50, 500, 5k, 50k Hz (at -3 dB, 6dB/oct)
External dimensions (W×D×H) Approx. 49 x 136 x 160mm (Excluding projections)
Weight Approx. 740 g

*1 Subject to the conditions:

  • Room temperature is 23ºC ±5ºC.
  • When 30 minutes or more have elapsed after power has been turned on.
  • Filter is set to 10 or Line.
  • Sampling rate is set to 1 second.
  • GND terminal is connected to ground.
 
 
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