Recorder A543 (A-543, A 543, a543, a-543, and 543)
Device A543 - three-channel analogue product intended for measuring and recording the values of the process parameters on the band diagram of thermocouples and RTD sensors having uniform output signals and for signaling the state of the process parameters.
The number of independent channels - 3.
Performance - 1,0 c; 2,5 c; 5c; 10s.
Nominal average speed chart tape - 20mm / h, 40 mm / h, 80 mm / h, 160 mm / h 320mm / h 640mm / h, 1280mm / h 2560 mm / h.
The number of settings control (signaling) - 1 per channel.
- PR thermocouple (B), PP (S or R), HA (K), HC (L);
- Resistance thermal 10P, 50P, 100P, 10M, 50M, 100M;
- Voltage from 100mV to 0mV;
- Currents from 20mA to 0mV;
- Radiation pyrometers from 0 mA to 20 mA.
A543 devices are widely used in systems of control and management of the technical processes of metallurgy, power, refining and petrochemical, food and other industries.
Registrar A543 made steel frame, rectangular in shape, size 120x160x590 mm, shield performance. Weight of the device - no more than 12.5 kg.
- Voltage - 220V;
- Frequency of 50Hz;
- Power - 24W.
The recorder has an LED display "appliances are included."
Operating position A543 vertical scales, scale length and width of the chart paper of 100 mm. Recording - a continuous line, the release writing device - no more than 2.5 mm. For units with a speed of 1 second after a sudden change of the input signal from the lower and upper limits are permitted line breaks registration will not result in a loss of information. Visits pointers A543 for the extreme of the scale is not less than 1 mm. Substituted with writing devices relative to each other in the coordinate time - not more than 3.5 mm. The number of vibrations pointer device near the equilibrium - no more than 3.
Output devices A543 - one two-point alarm device (two independent set points, relay 30V / 0.2A or 127V / 0,13 A). Current output from 0 mA to 5 mA or 4 mA to 20 mA (without linearization). Signaling device devices A543 is at the output of a contact group on the switch, designed for connecting a resistive load to the characteristics:
- DC voltage up to 30 V at a current of 0.2 A;
- AC voltage up to 127 V at a current of 0.13 A.
Registrars A543 have a range that meets the requirements of GOST 18140. The reference range alarm settings - 0-100% range of the output signal. Variation of the readings does not exceed the basic error indications. Key value of the error, which may have served A543 devices in Table 1.
Changing devices for error indications caused by changes in ambient temperature of (20 ± 2) ° C and the upper (lower) of the work, as a percentage of the fiducial value does not exceed the values defined by the formula:
Δ I n (t) = K 1 [(t a (n) - t n)],
where K 1 - the coefficient of proportionality, equal to 0,015% / ° C;
t a (n) - the upper (lower) of the ambient temperature to the operating conditions;
t n - the temperature for normal conditions.
Registrar A543 allows for the change of error signal caused by changes in ambient temperature from plus (20 ± 2) ° C and the upper (lower) of the work, expressed as a percentage of the fiducial value does not exceed the values defined by the formula:
With Δ I (t) = K 1 [(t a (n) - t n)],
where K 1 - proportionality coefficient equal to 0,03% / ° C; t a (n), t n - is the same as in formula (1).
Change error registrars A543 caused by varying the supply voltage to plus 10 and minus 15% as a percentage of the fiducial value, does not exceed: for the testimony of 0.25, 0.5 signaling the nominal value.
Changing the instrument error caused by the influence of an external magnetic field of 400 A / m, formed nearly sinusoidal current frequency of 50 Hz, expressed as a percentage in the most non - favorable phase and the direction of the field does not exceed: for the testimony of 0.5 by 0.8 by signaling the fiducial value .
Change error A543 on the testimony and the alarm caused by the influence of the interference voltage of normal form, equal to 5% of reference range (for devices with an input signal a cash-voltage direct current), or 5% of the product range changes in the input signal to the input impedance (for devices with the input DC current), and having any phase angle is not more than 0.5% of the fiducial value.
Change error registrars A543 caused by the influence of common mode voltage equal to the reference range (for devices with input DC voltage), or the product of the range of the input signal at the input impedance (for devices with input DC current) and having any phase angle does not exceed: for the testimony of 0.25, 0.5% of the signal of the fiducial value.
Electrical isolation circuit device A543 relative to the housing between a chain and at ambient temperature (20 ± 5) and a relative humidity of 80% stands for 1 mininuty AC test voltage of substantially sinusoidal waveform, 50 Hz as per Table 2.
The insulation resistance circuit devices A543 relative to the housing between a circuit and should not be less than the values shown in Table 3.
A543 devices intended for use in the measurement of flow, speed of the chart paper should not be less than 80 mm / h The mean speed of the chart paper does not exceed ± 1,0% of its nominal value.
Operating conditions A543
Mean time the device - 20,000 hours. A543 recorders are designed to operate at an ambient temperature of 5 ° C to 50 ° C and the upper limit of 80% relative humidity at 35 ° C and lower temperatures without condensation. A complete T Average lifetime to write off at least 10 years of age.