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Fully automatic control
·The integration of flame burner and graphite furnace in one compact unit enables automatic interchanging between the flame mode and furnace mode using few simple keystrokes.
·Eight-Lamp turret for automatic positioning of each hollow cathode lamp.
·Automatic fuel gas(C2H2) flow rate adjustment to optimize combustion efficiency in element analysis.
·Automatic adjustment of burner height for optimized analysis conditions.
·Automatic Reflecting/Transmitting beamsplitter positioning (to lead the light of deuterium lamp into optical path) when the Deuterium Lamp Background Correction function is selected
·Automated wavelength scanning and peak-seeking
· Automatic switchover of spectral bandwidth (5 choices).
· Automatic negative voltage and lamp current adjustment, automatic AA and BG energy balance, automatic igniting and interlock protection in case of flameout.
Advanced Graphite furnace
·Uniformity of the graphite tube temperature reduces chemical interference and residue interference.
· The PC-controlled heating program offers a multitude of heating method choices. The optical temperature control ensures rapid heating and extends the life of the graphite tube.
Safety Assurance
·Flame Monitoring: Constant monitoring. When accidental flameout occurs, an alarm is given and the acetylene flow is stopped immediately
·Pressure Monitoring: Constant air pressure detection. When abnormalities are detected, acetylene flow will be automatically cut off for safety fire extinguishing. The argon gas pressure monitor will disconnect the electricity to the graphite tube when an absence of the protective argon gas is detected.
·Cooling water flow monitoring: The power supply to the furnace will only be activated for heating when the cooling water flow is determined enough to cool down the furnace body.
·Graphite Tube Fracture Protection: Power supply used for heating is automatically shut off and an alarm is given if a sudden graphite tube fracture is detected.
Specifications
| Optical System: Czerny-Turner(C-T) type monochromator. |
| Wavelength range |
190nm ~ 900nm |
| Spectral bandwidth |
0.1 nm, 0.2 nm, 0.5nm, 1.0 nm, and 2.0 nm. (5 steps, with automatic changeover) |
| Wavelength accuracy |
+/-0.3 nm (automatic correction) |
| Wavelength reproducibility |
0.2 nm |
| Resolution |
over 0.3 nm |
| Baseline Stability |
0.005A/30 min |
| Flame analysis |
| Sensitivity |
Cu 5µg/ml>0.850 Abs |
| Burner Head |
Titanium alloy burner |
| Nebulizer |
High-efficiency glass nebulizer |
| Atomization Chamber |
Corrosion-resistant material |
| Position Adjustment |
Automatic flame and furnace changeover |
| Automatic flame burner optimum height setting |
| Safety |
Automatic ignition of mixing air-acetylene gas with protection control. |
| Graphite furnace analysis |
| Characteristic Mass (Cd) |
0.8Pg |
| Temperature Range |
Ambient - 2650°C |
| Heating |
voltage feedback control when drying and ashing |
| optical temperature control when atomizing |
| Heating program |
up to 9 steps with choices of ramp, ladder and full-power heating |
| Background correction |
| Deuterium Lamp Background Correction |
1.0 Abs |
| Self-Reversal Background Correction |
3.0 Abs |
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Data processing |
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Analytical method |
flame AA, graphite furnace, hydride, and flame emission |
| Determination method |
calibration curves (1~3 order), standard addition method |
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Repetition times |
1~20 times with calculations of average value, SD and RSD |
| Result Printout |
output of parameters, data, spectra and calibration curves |
| Mainframe |
| Light Source |
8 lamps, 2 lamps simultaneously lit (with one preheat) |
| Power Supply |
220V/50Hz three-phase AC, 200W(mainframe), 5000W(graphite furnace) |
| Size |
mainframe 110cm x 50cm x 45cm, 75kg |
| graphite furnace power supply system 50cm x 50cm x 45cm, 50kg |
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Note: The TU-1800 features all the advanced functions of the TU-1800S, but is simplified by removing the selectable bandwidth feature. The TU-1800 will remain at 2.0 nm set spectral bandwidth while the TU-1800S can analyze using four different bandwidths | 
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