840 Fuel Test System
The 840 Advanced Fuel Cell Test System is a turn-key test station for fuel cell research and university education programs. The 840 combines a computer-controlled instrument with fuel handling hardware in an integrated bench-top unit. The 840 is designed for use with small to large single cells or short stacks.
The Model 840 is targeted for applications requiring gas flow rates up to 12 SLPM and is based on the time-tested 850 series of turn-key fuel cell test stations. The 840 features dual range anode and cathode mass flow controllers for wide range flow control which is ideal for RH cycling. Also included are input selector valves and a 16-channel data acquisition module for additional voltage and temperature measurements.
The Model 840 uses Scribner’s 890 Multi-Range Electronic Load for accurate, wide-range current measurement. And, the Model 840 comes with FuelCell®, the industry’s most powerful and user-friendly application software for controlling station operation and experimentation.
- Ideal for large area single cell cells & short stacks
- 890 Electronic Load: 500W (12/62/125A or 25/125/250A) or 1 kW (50/250/500A), 20 V
- 892 Data Acquisition Module: 16 channels of voltage/temperature measurement integrated with FuelCell® software
- Dual Anode & Cathode mass flow controllers for enhanced accuracy over wide flow range
- Gas Selector Valves for Automated Switching between up to 3 Anode and 3 Cathode Gases
- Automated humidifier by-pass for wet/dry cycling
- Large capacity Anode & Cathode SS humidifiers with automatic water fill
- Flexible SS temperature controlled heated gas transfer lines
- FuelCell® software for user-friendly computer controlled cell operation & experimentation
- Constant or stoichiometric-controlled reactant flow rate
- Current, voltage or power control modes
- Continuous real time cell resistance and IR-free voltage measurement by Current Interrupt
- Whole cell voltage plus two high-impedance reference inputs for half-cell data
- Impedance spectroscopy & HFR option
- Safety features include detection of alarm conditions and automatic hardware shutdown for safe, reliable operation
| Specifications: | Details |
|---|---|
| Electronic Load: | |
| Maximum Load Current: | 5/25/50 A; 10/50/100 A; 12/62/125 A; 25/125/250 A (config. dependent) |
| Maximum Load Power: | 125 W or 500 W (configuration dependent) |
| Minimum Load Resistance: | < 2 mΩ (100 mV @ 50 A at load terminals) |
| Current Resolution: | 1 mA at low currents – up to 100 mA (current setting dependent) |
| Current Accuracy: | ±0.3% of full scale current of selected range |
| Voltage Measurement and Data Acquisition: | |
| Max. Whole Cell Voltage: | 20 V Max |
| Reference Electrode Voltage: | 9.999 V |
| Voltage Resolution: | 1 mV |
| Voltage Accuracy: | ±3 mV ±0.3% of reading |
| Voltage & Current Data Update Rate | 100 Hz |
| Whole Cell Sense Input Resistance: | > 35 kΩ |
| Reference Electrode Input Resistance: | > 109 Ω |
| Impedance Analyzer (Optional 880): | |
| Internal Impedance Analyzer Type: | Single sine, one generator and two gain/phase measurement channels |
| Internal Analyzer Frequency Range: | 1 mHz to 10 kHz |
| Measurement Channels: | Three: whole cell plus two half cell vs. Reference Electrode |
| Reactant Gas Control System: | All 316 SS construction (humidifiers, flow path, valves and mass flow controllers) with Swagelok® fittings Temperature controlled reactant transfer lines |
| Mass Flow Control: | Dual, software controlled mass flow controllers per channel, Anode: 6 SLPM (1 + 5 SLPM), Cathode: 12 SLPM (2 + 10 SLPM). Other sizes available on request. Automatic N2 purge valves |
| Alarm Inputs: | Gas supply pressures (3), humidifier water levels (2), external (1), system alarm output (1) |
| Backpressure Control (Optional): | Manual or Automatic: 0 – 3 atm (0 – 30 PSIG). High Capacity: forced air condensers with large tanks and SS regulators. |
| Temperature Controllers: | Five: cell, anode humidifier, anode line, cathode humidifier, cathode line Set & Report Accuracy: ±0.25% of span, ±1 least significant digit Sensor Type: Thermocouple, Type T for cell (Type K optional for high temperature) |
| Humidifiers: | Dual sparger-type, passivated 316L, 1650 W heaters per bottle |
| Temperature Range: | Ambient to 99 °C Fill Method: Automatic water fill. Requires 3 atm (45 PSIG) minimum water feed or 1.4 atm (20 PSIG) above back pressure |
| Environment: | |
| Operating Temperature: | 5 to 35 °C |
| Power Source: | 220-240 V, 50-60 Hz, 20 A |
| Enclosure Type: | |
| Single Bench Top Enclosure Size and Weight: | 91 cm H x 61 cm W x 61 cm D (+ 41 cm for heated gas lines), 55 kg 36” H x 24” W x 24” D (+ 16” for heated gas lines), 120 lb. |
| Safety Features: | Automatic shutdown and N2 purge on under-voltage, over-current, over-temperature, loss of reactant or purge gas pressure, low water, communications failure or external alarm, Emergency Stop switch for manual operator shutdown |
| Specifications given for 25 °C ambient temperature unless otherwise noted. |