Resistivity, Conductivity Electronics | 2850

Description Ordering Information – 2850 Sensor Electronics** with EasyCal NPT mount junction box (¾ inch threaded) for standpipe or integral mounting, single input only 3-2850-51 159 001 398 One input/one digital (S3L) output for use with 8900 or 9900 One input/one 4 to 20 mA output 3-2850-52 159 001 399 One input/one 4 to 20 mA output Universal mount junction box for remote mount, single or dual input 3-2850-61 159 001 400 One input/one digital (S3L) output for use with 8900 or 9900 3-2850-62 159 001 401 One input/one 4 to 20 mA output 3-2850-63 159 001 402 Dual input, dual (S3L) output for use with 8900 only **For use when remote sensor mounting is desired. Compatible with ALL Signet conductivity electrodes. See individual electrode product pages for more information. Specifications General Compatible Electrodes All GF Signet Sensors Materials NPT Mount Junction  Box for Integral Mount PBT Universal/Remote Mount PBT, CPVC EasyCal – Automatic Recognition of the Following Conductivity Values 146.93 μS, 1408.8 μS, 12856 μS (@25 °C) (Test solutions Per ASTM D1125-95) 10 μS, 100 μS, 200 μS, 500 μS, 1000 μS, 5000 μS, 10,000 μS, 50,000 μS, 100,000 μS (@ 25 °C) (Standard test solutions) Electrical Power 12 to 24 VDC ±10%, regulated for 4 to 20 mA output (typically called “Loop Powered”) 5 to 6.5 VDC ±5% regulated recommended (provided by the GF Signet 8900, 9900, 0486), 3.0 mA max for Digital (S3L) output (Reverse polarity and short circuit protected) Digital (S3L) Output: Serial ASCII, TTL level 9600 bps Accuracy Conductivity ± 2% of reading Temperature < 0.2 °C Resolution Conductivity 0.1% of reading Temperature < 0.2 °C Update Rate Conductivity and Temperature < 600 ms   Available Data via Digital (S3L) Output Raw conductivity Calibrated  conductivity Calibrated  temperature-compensated conductivity Temperature Max. Temperature/Pressure Rating Operating Temperature -10 °C to 85 ° C 14 °F to 185 °F Storage Temperature -20 °C to 85 ° C -4 °F to 185 °F Relative Humidity 0 to 95%, non-condensing Enclosure NEMA 4X/IP65 Current Output – Field-selectable ranges Factory Set Span(Integral mount only) 0.01 cell (2839**) 4 to 20 mA = 0 to 100 ?S 0.10 cell (2840**) 4 to 20 mA = 0 to 1000 ?S 1.0 cell (2841**) 4 to 20 mA = 0 to 10,000 ?S 10.0 cell (2842**) 4 to 20 mA = 0 to 200,000 ?S 20.0 cell (2823)* 4 to 20 mA = 0 to 400,000 ?S *Special Order  **Test certificate supplied  with all sensors. Custom cell constant programmed into the electronics. Max. Loop Resistance 50 Ω @ 12 VDC 325 Ω @ 18 VDC 600 Ω @ 24 VDC Accuracy ± 2% of output span Resolution 7 μA Update Rate < 600 ms Error Indication 22 mA Pure Water Compensation When using 0.01-cm cell and raw conductivity value < 0.5 μS, the 2850 auto-switches to compensate for non-linear temperature effects  found in this low conductivity (high resistivity) range. Shipping Weight NPT Mount Junction  Box 0.75 kg 1.75 lb Universal Mount 0.75 kg 1.75 lb Standards and Approvals CE, FCC RoHS compliant, China RoHS Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management and OHSAS 18001 for Occupational Health and Safety Field Selectable Ranges for 4 to 20 mA Operation The chart below indicates the field selectable ranges in which the 2850 sensor electronics can be set via internal switches. All ranges can be inverted if required. Signet Models listed below are compatible Conductivity/Resistivity electrodes. 0.01 Cell                     0.10 Cell                     1.0 cell                     10.0 Cell                     20.0 Cell Signet Model 2839 Signet Model 2840 Signet Model 2841 Signet Model 2842 Signet Model 2823 (Special Order) 10 to 20 MΩ 0 to 2 μS 0 to 20 μS 0 to 200 μS 0 to 400 μS 2 to 10 MΩ 0 to 5 μS 0 to 50 μS 0 to 500 μS 0 to 1,000 μS 0 to 2 MΩ 0 to 10 μS 0 to 100 μS 0 to 1,000 μS 0 to 2,000 μS 0 to 1 MΩ 0 to 50 μS 0 to 500 μS 0 to 5,000 μS 0 to 10,000 μS 0 to 5 MΩ 0 to 100 μS 0 to 1000 μS 0 to 10,000 μS 0 to 20,000 μS 0 to 10 MΩ 0 to 200 μS 0 to 2000 μS 0 to 50,000 μS 0 to 100,000 μS N/A 0 to 500 μS 0 to 5,000 μS 0 to 100,000 μS 0 to 200,000 μS N/A 0 to 1,000 μS 0 to 10,000 μS 0 to 200,000 μS 0 to 400,000 μS The 4 to 20 mA output ranges shown in this chart can be inverted using the internal switch Resistivity. Ranges are in BOLD Note: The 2819-2823 series Integral Systems must be ordered through special order products.