Аналоговые контроллеры SI 792, SI 794

Number of Inputs

1

Conductivity Input

Input for Inductive Conductivity (Electrodeless) sensors (3700 series)

Temperature Input

PT 100 / PT 1000 / NTC 30 kohms / NTC 100 kohms selectable

Measurement Ranges

Conductivity: 0.00 to 1999 mS/cm Concentration: 0.00 to 100.0% Salinity: 0.0 to 45.0‰ 0 to 35°C (32 to 95°F) PT 1000/PT 100: -20.0 to 150°C (-4 to 302°F) NTC: -20.0 to 130.0°C (-4 to 266°F)

Effective Ranges (display 3-1/2 digits)

Conductivity: 00.00 to 99.99 mS/cm; 000.0 to 999.9 mS/cm; 0000 to 1999 mS/cm Concentration: 0.00 to 9.99%, 10.0 to 100.0% Salinity: 0.0 to 45.0‰ 0 to 35°C (32 to 95°F)

Accuracy1,2,3

Conductivity: <1% measured value +0.02 mS/cm

Temperature: <0.5 K (<1 K for PT 100; <1 K for NTC >100°C)

Temperature Compensation* (reference temperature 25°C)

(OFF): Without

(Lin): Linear characteristic 00.00 to 19.99%/K

(NLF): Natural waters to EN 27888

Permissible Cell Factor

00.100 to 19.999

Admissible Transfer Ratio

00.100 to 19.999

Admissible Zero Point Adjustment

±0.5 mS/cm

Concentration Determination

-01- NaCl: 0 to 26% by weight 0°C (32°F); 0 to 28% by weight (100°C (212°F) -02- HCl: 0 to 18% by weight -20°C (-4°F); 0 to 18% by weight 50°C (122°F) -03- NaOH: 0 to 13% by weight 0°C (32°F); 0 to 24% by weight 100°C (212°F) -04- H2SO4: 0 to 26% by weight -17°C (1°F); 0 to 37% by weight 110°C (230°F) -05- HNO3: 0 to 30% by weight -20°C (-4°F); 0 to 30% by weight 50°C (122°F) -06- H2SO4: 94 to 99% by weight -17°C (1°F); 89 to 99% by weight 115°C (239°F) -07- HCl: 22 to 39% by weight -20°C (-4°F); 22 to 39% by weight 50°C (122°F) -08- HNO3: 35 to 96% by weight -20°C (-4°F); 35 to 96% by weight 50°C (122°F) -09- H2SO4: 28 to 88% by weight -17°C (1°F); 39 to 88% by weight 115°C (239°F) -10- NaOH: 15 to 50% by weight 0°C (32°F); 35 to 50% by weight 100°C (212°F)

Outputs

4-20 mA output / bus connection galvanically separated

Display

LC display, 7-segment: measured value display conductivity, concentration, salinity, temperature Main display: character height 17 mm; unit symbols 10 mm Secondary display: character height 10 mm; unit symbols 7 mm

Alarm Indication

Red LED with alarm or HOLD

Memory Backup

Parameters and calibration data >10 years (EEPROM)

Operating Temperature

-20 to 55°C (-4 to 131°F)

Storage Temperature

-20 to 70°C (-4 to 158°F)

Relative Humidity

10 to 80%, non-condensing

Immunity

EN 61326 (Industrial levels)

Hazardous Location Certifications

Non-incendive si792 E FM: N.I. Class I, Div. 2, Group A, B, C, D, T4 for Tamb < 55°C CSA: N.I. Class I, Div. 2, Group A, B, C, D, T4 for Tamb < 55ºC Intrinsic safety si792x E FM: Class I, II, III, Div. 1, Groups A-G, T4 for Tamb < 55°C CSA: Ex ib [ia] IIC, Class I, Div. 1, Groups A, B, C, D, T4 for Tamb < 55°C ATEX: II 2 (1) G EEx ib [ia] IIC T6 Intrinsic Safety si792x E-FF, si792x E-PA cFMus: Class I, Div. 1, Groups A-D, T4 for Tamb < 55°C Ex ib [ia] IIC T4 ATEX: II 2 (1) G Ex ia IIC T4 Note: PP and PVDF overmold 3700 Inductive Conductive sensors are not ATEX certified

Enclosure Material

PBT (polybutylene terephthalate)

Protection/Rating

IP 65

Cable Glands

3 breakthroughs for cable glands M20x1.5 2 breakthroughs for NPT 1/2-in. or rigid metallic conduit

Mounting

Wall, panel, or pipe (horizontal or vertical)

Dimensions

144 x 144 x 105 mm (5.7 x 5.7 x 4.1 in.)

Weight

Approximately 1 kg (2.2 lbs.)