prepASH Operating Instructions
Precisa
Ref01.i
5
3.2.2 Functions of the Ashing Device
The prepASH 129 ashing device is simple to operate. It facilitates the quick and reliable drying /
ashing of liquid, porous or solid materials. The device works using thermo gravimetric principles.
The most important basic features of the ashing device include:
•
Simultaneous automatic drying, ashing and weighing of up to 29 samples.
•
Simultaneous measuring and logging of all samples throughout the entire measurement
procedure.
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Automatic compensation for lift.
•
5.7“ VGA color touch screen for simple operation and clear display.
•
Temperature range of 50 °C to 1000 °C.
•
Connection to an external balance for weighing in the samples.
•
Flash card for storage of results.
3.3 Technical
data
•
Mains connection
- 230 VAC (+15/-20 %); 50 to 60 Hz
- 15 A
•
Power consumption
- 3300 VA
•
Balance system
- Weighing range: 120 g
- Number of samples: 1 - 29
- Resolution: 0.0001
- Unit: g
•
Heating system
- Ceramic infrared radiator
- Temperature range: 50 °C – 1000 °C
- Temperature stability: ± +/- 2%
- Temperature curves are individually configurable
- Time to steady-state: 0 – 6 h
- Dwell time: 0 – 20 h
- Auto stop: 0.1-100 mg/min, mg/30min, mg/60min
•
Results
- Weight loss in %, ‰, g
- Weight loss to the pre-interval in %, ‰, g
- Residual weight in %, ‰, g
- Residual weight to the pre-interval in %, ‰, g
•
Monitoring
- Acoustic
- Alarm output for external monitoring
•
Gas requirements
- Oxygen: 99.5 % purity, 3 bar (± 10 %), 0 – 9 l / min
- Nitrogen: 99.5 % purity, 3 bar (± 10 %), 0 – 9 l / min
- Compressed air, oil-free and without condensation, 6 bar (± 10 %)
•
Furnace atmosphere
- Oxygen, nitrogen or compressed air
- Flow rate is measured electronically
•
Data outputs
- RS232 port for a PC (COM1)
- RS232 port for an external balance (COM2)
- Centronics port for a printer (LPT1)
- Alarm output (floating double-throw contact)
•
Operation and display
- 5.7“ VGA color touch screen
- Menu-guided operation
