890ZV SOFC Test Load

Product Descriptions
The bench-top Model 890ZV consists of a programmable electronic load, fuel and temperature controls, and data acquisition functions. A built-in power source makes the 890ZV particularly well suited for small single-cell SOFC work for research, laboratory, and educational use.

The 890ZV is optimized for cost and size, and offers extra hardware features and Scribner Associates’ FuelCell^® software.

The 890ZV is typically used with a SOFC fuel cell, a suitable furnace, and a fuel management unit. The 890 Series is supported by the Scribner 885 Integrated Fuel Cell Potentiostat.

Features

• Electronic load with two current ranges: 5 / 25 A, 10 V, 50 W
• Ramping cell/furnace temperature control
• Control signals for two (2) main mass flow controllers plus five (5) additional mass flow controllers
• Continuous real-time cell resistance and IR-free voltage measurement by current interrupt
• Whole cell voltage plus two high-impedance reference electrode inputs for half-cell data
• Optional internal impedance analyzer for EIS and continuous real-time high frequency resistance (HFR)
• Cell main terminals and sense inputs tolerant of non-isolated cell
• Three (3) internal controllers for anode and cathode humidifier and cell temperatures
• Current, voltage or power control mode
• Contact inputs for three pressure sensors or alarms
• Low voltage output signal to control purge gas valves and to indicate alarm condition
• RS485 digital interface for supported external devices
• The 890ZV requires a custom or third-party fuel management unit to make a complete test station.
• Safety features include detection of alarm conditions and automatic hardware shutdown for safe, reliable operation

Specifications

Electronic Load
Maximum Load Current (2 ranges)	5 A, 25 A
Maximum Load Voltage	10 V
Maximum Load Power	50 W
Minimum Load Resistance	3.3 V power supply used to allow zero load voltage at full current with up to 3.2 V drop in cell wiring
Current Resolution	1 mA
Current Accuracy	0.3% of full scale current of selected range
Voltage Measurement and Data Acquisition
Maximum Whole Cell Voltage	10.000 V
Maximum Reference Electrode Voltage	9.999 V
Whole Cell Sense Voltage Input Resistance	35 kΩ
Reference Electrode Input Resistance	10⁹Ω
Voltage Resolution	1 mV
Voltage Accuracy	+3 mV +0.3% of reading
Voltage and Current Data Update Rate	100 Hz
Fuel Interface
Outputs for anode, cathode flow controllers	Two, Analog (0-5 V)
Outputs for reformate flow controllers	Five, Analog (0-5 V) (optional)
Alarm Inputs	Six: Three for gas pressures, three auxiliary
Alarm Outputs	One, 5 V logic
Fuel Solenoid Control	One, 5 V output (external relay needed, included with interface box)
Temperature Controllers
Quantity	Three (Anode, Cathode and Cell / Furnace)
Type	On/off 5 V output (external SSR required)
Set and Report Accuracy	+0.25% of span, +1 least significant digit
Sensor Type	Thermocouple, Type K Standard, T or S optional
Environment
Operating Temperature	0-40 °C ambient; all specs given for 25 °C ambient
Power Source	100-240 VAC, 50/60 Hz (auto select)
Size	3U std rack mount, 19” W x 5.25″ H x 21″ D