Front view of an optek 556 turbidity converter

optek 556 and 156 converters side by side

556 Converter

Dual Channel Optical Converter

The dual channel converter 556 provides continuous inline, real-time measurement and control of turbidity. The customer’s specific factory calibration of the converter can be configured in ppm (DE), FTU or EBC. Combined with an optek TF56-N scattered light sensor the 556 converter is a cost-saving measuring system, providing reliable process measurements.

Used For

For NIR Absorption sensors (Turbidity)
- Turbidity (EN ISO 27027)
  - ppm (DE)
  - FTU
  - EBC

The 556 converter provides continuous inline, real-time measurement and control of concentrations or turbidity in a variety of industrial processes. With four fixed measuring ranges and one variable measuring range, the converters can be set to match your specific process parameters. The 3-digit LED indicator displays the percentage of the selected measuring range. Two independent set points and one mA output are provided for alarms and real-time process monitoring when wired to the plant's process control system. An additional failsafe relay output is built in for remote sensing of lamp or power failure.

Features

Benefits

Dual channel photometric measurement converter

Cost effective converter for one scattered light turbidity sensor

Pre-calibrated for FTU, EBC and ppm (DE)

Easy commissioning

Two alarm settings

Individual setting of alarm status

Compact dimensions

Easy to integrate into installations

556
Housing	19"-version for rack-mounting 3 U / 21 HP dimensions: W 106.3 mm (4.19 in) H 128.4 mm (5.06 in) D 208 mm (8.19 in) material: aluminum / diverse plastics protection: front IP40 / rear IP20 (mains supply secured against accidental touching)
Display	1 digital read-out, LED display, 3 digits, height: 7 mm
Operation	dip switches, potentiometer, coding switch
LED	1 LED (red):power on 1 LED (green):zero 5 LED (yellow):measuring ranges 2 LED (red):alarms I and II 1 LED (red):lamp or system failure
Sensor-inputs	1 for optek photometric sensor TF56
Sensor lamp-outputs	1 lamp supply for optek photometric sensor 4.8 -7.0V DC
mA-outputs	1 x 4 - 20 mA (functionally gavanically isolated) accuracy:< 1 % load:< 500 Ohm
Relay-outputs	2 independently adjustable SPDT contacts 0 - 250 V AC, 0 - 300 V DC, 0 - 8 A (refer to load limit curve relay outputs in the manual) for alarm I and II
Failsafe-output	1 SPDT contact to alarm in case of lamp or system failure (active) 0 - 250 V AC, 0 - 300 V DC, 0 - 8 A (refer to load limit curve relay outputs in the manual)
Cable lengths (sensor)	2, 3, 5, 10, 15, 20, 30 ... 100 m (7, 10, 16, 33, 49, 66, 98 ... 328 ft.) sensor AS56: max 50 m
Power supply	115 / 230 V AC, selectable (93.5 - 132 / 187 - 264 V AC, 47 - 64 Hz) or 24 V AC / DC (AC: 20.4 - 26.4 V AC, 47 - 64 Hz; DC: 20.4 - 28.8 V DC) power consumption:< 30 VA
Ambient conditions	temperature during operation (no direct sunlight): converter:0 - 50 °C (32 - 122 °F) with optional stainless steel housing S19-42 (IP65):0 - 40 °C (32 - 104 °F) with optional plastic housing B19-42 (IP66):0 - 35 °C (32 - 95 °F) with optional plastic housing B19-21 (IP66):0 - 35 °C (32 - 95 °F) temperature during transport (no direct sunlight): -20 - 70 °C ( -4 - 158 °F)
Data given are subject to changes without prior notice.