The AR.4 is a network analyzer that measures, displays, and records in memory the main electrical parameters of a single or three phase network (balanced or unbalanced).
Besides, the instrument is very flexible and can be reprogrammed by means of a card to work as another type of analyzer like transient events monitor, disturbances monitor or other programs that are being developed.
FEATURES WORKING AS A NETWORK ANALYZER:
Applications:
The AR.4 as a network-harmonic analyzer measures more than 30 electrical parameters that periodically saves in memory which allows:
- To reduce electrical costs by optimizing the contract with the power utility
- To calculate the capacitor bank to correct the power factor
- Perform studies about the quality of the power supply. Evolution of the overvoltage/undervoltage (average values of 1 sec.)
- Perform studies about the evolution of harmonics to detect/prevent their harmful effects
Display:
The instrument allows to display the instantaneous, maximum and minimum values of all the parameters from all the phases (Table 1).
Memorized values:
The instrument has two operation modes:
- a) Network analyzer mode: Periodically records in memory the measured electrical parameters (Table 1) that further can be printed out through an optional thermal printer type PT-42 or sent to a PC for analysis actions (see software).
- b) Harmonic analyzer mode: Periodically records in memory the measured electrical parameters (Table 1) and the voltage and current waveforms that can be sent later on to a PC to see waveforms and calculate the harmonics (see next page).
Two analog input channels (0 to 2.5 V d.c.) are available for the analysis of any external parameter.
AR.4 + Printer PT-42 N (optional):
Memorized data can be printed out through the thermal printer model PT-42 in a numerical and/or graphical mode.
AR.4 + Memory card + MCS-1:
In the AR.4 M and AR.4 MP types memorized data can be stored in a memory card and through the MCS-1 can be sent to a PC to be further analyzed.
The AR.4 RS cannot sent data to a memory card. Data is sent to the PC through the RS-232 port.
SOFTWARE AVAILABLE:
Two software programs are available: CIR-VISION and CIR-TARIF, both are programs for Windows that can help manage data from the AR.4.
CIR-VISION:
- Numerical display of all the electrical parameters measured by the AR.4 (Fig. 1).
- Display of the time evolution of any of the measured parameters attached in Table 1 (Fig. 2).
- Display of voltage and current wave forms (Fig. 3).
- Display and calculate the harmonics spectrum of the voltage and current wave forms. It calculates up to the 15th harmonic.
- Possibility of exporting to other software (Excel, Lotus, etc.)
- Display of the time evolution of the three-phase voltage.
- Display of the time evolution of the three-phase reactive energy power.
- Display of the time evolution of the three-phase active energy power.
- Determination of the consumption during peak, plane, and valley hours in order to make simulations to improve the bill from the power utility.
REPROGRAMMING:
The AR.4M and AR.4MP types, besides working as network analyzers with a card, can be reprogrammed to work as other types of analyzers; for example, a transient event analyzer or a disturbance analyzer.
The AR.4 RS cannot be reprogrammed.
TECHNICAL CHARACTERISTICS:
- Supply voltage: 230 V a.c.
- Tolerance: +10%/–15%
- Frequency: 50–60 Hz
- Consumption: 25 VA
- Working temperature: 0–50º C
- Measuring circuit: three-phase or arcon
Voltage measuring circuits:
- Measuring range: 120–480 VAC (phase-neutral) (automatic scale adjustment)
- Other voltages through V transformers
- Frequency: 45–65 Hz
- Measuring range: See available current clamps
- Voltage and current transformer ratios programmable
- Measuring units: Automatically selected
DC analog inputs
- Number of channels: 2
- Measuring range: 0 V TO 2.5 V d.c.
- Internal clock (battery supplied): Date and time
- Display LCD: 2 lines x 16 characters
- Printer output: Serial
- Memory card: 128 kbtes TO 1 m (optional)
