Product Description
📘 Product Overview
| Field | Details |
|---|---|
| Manufacturer | Foxboro (by Schneider Electric) |
| Model Number | 873EC-BIYFGZ-7 |
| Description | Electrochemical Analyzer for Electrodeless Conductivity, Metal Enclosure, Pipe Mount, 220 V AC, General Purpose Certification, with Storm Door Option (assumed for -7) |
| Product Type | Conductivity analyzer for aqueous solutions with electrodeless sensors |
| Applications | Industrial process control, chemical concentration, water purity, non-fouling solutions, oleum strength analysis |
| Features | Dual alarms, dual analog outputs, EEPROM memory, security code, front panel display/keypad, storm door (transparent, hinged for display visibility and keypad protection), application flexibility |
| System Compatibility | Compatible with 871EC and 871FT sensors (Model 1210 sensors not supported) |
⚡ Electrical Specifications
| Parameter | Specification |
|---|---|
| Power Supply | 220 V AC, 50/60 Hz ±3 Hz |
| Output Signals | - Analog Outputs: 2 isolated outputs (4-20 mA, 0-10 V DC, or 0-20 mA); Channel 1: Conductivity/Temperature/Log of Conductivity; Channel 2: Conductivity/Temperature/Log of Conductivity - Alarm Contacts: 2 nonpowered Form C contacts, 5 A noninductive, 125 V AC/30 V DC (min. 1 A) |
| Input Signals | - Conductivity: Electrodeless sensors (871EC/871FT), configurable for 50 µS/cm to 2000 mS/cm or concentration (%) - Temperature: 100 Ω RTD (-17 to +199°C) or 100 kΩ thermistor (-17 to +121°C) |
| Signal Connections | Terminal blocks: TB1 (power), TB2 (sensor), TB3 (alarms), TB4 (analog outputs); recommended conduit/fittings for NEMA 4X/IP-65 (Table 2, page 30) |
| Power Connections | TB1 terminal block; ground stud for earth connection in metal enclosure |
🔌 Functional Specifications
| Parameter | Specification |
|---|---|
| Measurement Ranges | - Conductivity: 50, 100, 200, 500 µS/cm; 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000 mS/cm (sensor-dependent) - Concentration: HCl (0-15%), NaCl (0-25%), H₃PO₄ (0-35%), HNO₃ (0-10%), H₂SO₄ (0-25% or 93-99.5%), Oleum (18-42%), NaOH (0-15% at 25°C, 0-20% at 100°C) |
| Temperature Measurement | - RTD: -17 to +199°C (0 to 390°F) - Thermistor: -17 to +121°C (0 to 250°F) |
| Temperature Compensation | Automatic or manual; preprogrammed curves (NaCl, HCl, HNO₃, H₂SO₄, H₃PO₄, Oleum, NaOH, Green/Black Liquor) or custom curve (tCt); configurable via Cd code (Table 7, page 42) |
| Display | 4-digit red LED (14.2 mm height), decimal point, backlit engineering units (µS/cm, mS/cm, %); visible up to 6 m through storm door; alternates with error/alarm messages if triggered |
| Keypad | 8 keys (4 dual-function); includes Shift, Absolute/Increment, Temp, Enter, Next, Setup/Lock, Cal Low/Low Alarm, Cal High/High Alarm; protected by storm door |
| Alarms | - Dual Alarms: Configurable for conductivity or temperature; High/Low/Instrument/HOLD, Passive/Active, 0-99% hysteresis; timers (HAtt, HAFt, HAdL, LAtt, LAFt, LAdL) adjustable 0-99 min - Indication: Alternates with measurement on display |
| Analog Outputs | - Channel 1: Configurable for conductivity, temperature, or log of conductivity (HO1, LO1) - Channel 2: Configurable for conductivity, temperature, or log of conductivity (HO2, LO2) - Scaling: Linear or logarithmic; hold function (0-100% range) |
| Configuration | Via front panel keypad (accessed through storm door); setup entries (CELL, HOLD, Cd, HAC, LAC, etc.) and basic entries (Ct, FSC, tCF1, etc.); stored in non-volatile EEPROM |
| Security | User-configurable security code (default: 0800); locks/unlocks configuration changes |
| Calibration | - Electronic Bench Calibration: Using decade box (page 83) - Standardization: In-line/off-line with known solution (pages 87-89) - Temperature Cell Factor (tCF1): Adjusts for cable length/transducer deviations (pages 90-91) |
| Damping | Configurable: 0, 10, 20, or 40 seconds; affects display and analog outputs |
| Response Time | - Measurement: ≤2 seconds (zero damping) - Temperature: ≤15 seconds |
🌡️ Environmental Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature | -25 to +55°C (-13 to +131°F) |
| Relative Humidity | 5 to 95%, non-condensing |
| RFI Susceptibility | Metal enclosure: 10 V/m from 27 to 1000 MHz (with grounded conduit) |
| EMC Compliance | Complies with European EMC Directive 89/336/EEC (metal enclosure, rigid metal conduit for cables) |
✅ Performance Specifications
| Parameter | Accuracy |
|---|---|
| Analyzer Accuracy | ±0.5% of upper range limit |
| Temperature Compensation | Dependent on sensor and tCF1 adjustment; ±0.2°C for thermistor (0 to 70°C) |
| Contact Resistance | ≤100 milliohms (new relays); annual maintenance recommended for low-level signals |
🔧 Physical Specifications
| Parameter | Specification |
|---|---|
| Enclosure | Metal, extruded aluminum, epoxy-painted; NEMA 4X, CSA Enclosure 4X, IEC IP-65; watertight, dusttight, corrosion-resistant; includes storm door (transparent, hinged) |
| Mounting | Pipe mount (-Y option); universal mounting with U-bolts, support bracket, strap clamp (page 22, Figure 5) |
| Dimensions | 92(H) x 92(W) x 259(L) mm [3.6(H) x 3.6(W) x 10.2(L) inches] |
| Approximate Mass | 2.31 kg (5.1 lb) with pipe mounting brackets; slightly higher with storm door |
| Sensor Requirements | - Small Bore Sensors (SP, HP, TF, NL, PN, PX, PP, PT): 3-inch min. I.D. - Large Bore Sensors (LB, RE, UT, BW, EV): 6-inch min. I.D. - 871FT Flowthrough: No minimum I.D. required |
✅ Certifications and Compliances
| Standard | Details |
|---|---|
| FM Certified | General purpose (ordinary) locations (FGZ code) |
| CSA Certified | General purpose (ordinary) locations; 220 V AC not explicitly listed for hazardous locations (CGZ code for 24 V, 100 V, 120 V only) |
| Note | Metal enclosure designed for Class I, Div 2, Groups A-D (T6) with 24 V, 100 V, 120 V options; 220 V AC limited to general purpose use |
🛠️ Installation and Accessories
| Parameter | Details |
|---|---|
| Installation | - Pipe Mounting: Uses U-bolts, support bracket, strap clamp (page 22) - Wiring: TB1 (power), TB2 (sensor), TB3 (alarms), TB4 (analog outputs); rigid/semi-rigid conduit recommended (Table 2, page 30) |
| Storm Door | Transparent, hinged door attached to top front; prevents accidental keypad actuation while allowing display visibility; assumed as -7 option (page 15) |
| Optional Features | - Custom Curves: Temperature compensation (tCt), percent concentration (PCt) - Storm Door: Enhances protection in field environments |
| Accessories | - Sensors: 871EC (small/large bore), 871FT (flowthrough) - Conduit Fittings: T&B #370 (rigid metal), T&B #LT 50P (semi-rigid plastic), etc. (Table 2) |
| Maintenance | - Alarm Contacts: Annual resistance check (<100 milliohms); recondition with 20 W load if used at low levels (page 103) - Sensor Degaussing: Recommended for low conductivity (<500 µS/cm) to eliminate magnetization effects (page 12) |