Alarm:
1 x malfunctioning, 4 x user-configurable, max. 24 VDC/0.5 A, potential free contacts
Ambient Temperature:
10 - 30 °C ±4 °C deviation at 5 - 95% relative humidity (non-condensing)
Analogue Outputs:
Active 4 - 20 mA max. 500 Ohm load, standard 1, max. 8 (option)
Calibration:
Automatic; frequency freely programmable
Certifications:
CE compliant / ETL certified
Cycle Time:
10 - 15 minutes
Demineralised water:
N.A.
Digital outputs:
Optional: Modbus (TCP/IP, RS485)
Dimensions (H x W x D):
690 mm x 465 mm x 330 mm
Drain:
Atmospheric pressure, vented, min. Ø 32 mm
Earth connection:
Dry and clean earth pole with low impedance (< 1 Ohm) using an earth cable of > 2.5 mm²
Instrument air:
Dry and oil free according to ISA-S7.0.01-1996 quality standard for instrument air
Interferences:
Phosphates and similar dissociating ions and non-fatty acids which on acidification from undissociated acids may cause interference. Sulphide may deteriorate some types of pH electrodes. Fats, oil, proteins, surfactants and tar.
Lower Limit of Detection (LOD):
≤ 10 mg/L
Material:
Hinged part: Thermoform ABS, door: PMMA
Wall section: Galvanised steel, powder coated
Measurement method:
Acid-base titration
Measuring range:
VFAs 500 - 10000 mg/L as acetate equivalent;
Alkalinity, total and Alkalinity, partial 250 - 5000 mg/L as CaCO₃
Method:
Titrimetric
Number of sample streams:
1, 2, or 4
Parameter:
Volatile fatty acids (VFAs), total alkalinity
Power:
100 - 240 VAC, 50/60 Hz
Max. power consumption: 120 VA
Precision:
Better than 3% full scale range for standard test solutions
Protection Class:
Analyser cabinet: IP44 / Panel PC: IP65
Range:
VFA: 500‐10,000 mg/L, Total Alk: 250 - 5000 mg/L
Reagent requirements:
Keep between 10 - 30 °C
Rinsing:
With tap water
Sample Flow Rate:
100 - 300 mL/min
Sample Pressure:
By external overflow vessel
Sample Quality:
Maximum particle size 500 µm, < 0.1 g/L
Most applications require the use of an EZ9130 sampling/filtration system.
Sample Temperature:
10 - 30 °C
Validation:
Automatic; frequency freely programmable
Warranty:
12 months
Weight:
25 kg
What's included?:
EZ7253 VFA & Alkalinity Analyser Instruction Manual, 1 x Double Bit Door Key, 1 x Mounting Brackets, 1 x pH Electrode, Routine S7 Connection, 1 x empty 2.5L Reagent Container with Fittings (Anti-foam Solution) and 2 x empty 10L Reagent Containers with Fittings (H₂SO₄ & NaOH Solution)