Thermo Scientific PRO902C, Инструкция по эксплуатации

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PRO902C MANUAL
T FS
Rev 6.0 August 16, 2007 1-5
The power requirement is 120VAC, 800 watts, 60 Hz. AC hot is supplied to disconnect
DC1. From DC1, AC hot is distributed to the valve controller watchdog module, the heat
exchanger control module, the enclosure heater, and the enclosure utility light and outlet. TB-
2 supplies power and control for the heat exchanger temperature control. Please refer to the
7000 series drawings for the fuse schedule.
1.3.7.2 Valve controller (watchdog) module
The valve controller (watchdog) module controls all valves and contains an internal timer for
watchdog functions. Purge watchdog control is jumper-selectable for intervals of 8, 16, 32 or
64 minutes. The valve control module also houses the O2 zero and span request switches,
which allow maintenance crews to apply O2 zero and O2 span gasses while working at the
dilution probe assembly.
1.3.7.3 Heated filter control module
The heated filter control module interfaces with the Watlow controller in the remote probe
controller assembly to control the A/C heater for maintaining the factory set temperature of
285°F in the heated filter.
1.3.7.4 Heat exchanger control module
The heat exchanger control module interfaces with the Watlow controller in the remote probe
controller assembly to control a cartridge heater for cooling the heat exchanger block to a
factory set temperature of 45°F.
1.3.8 Absolute pressure transducer
The absolute pressure transducer is mounted on top of the purge valve (SV2) and produces a
4-20 mA signal, representing 0-15 psi absolute pressure.
1.4 Tubing and wiring umbilicals
The tubing and wiring umbilicals are the main link between the dilution probe assembly and
the analyzer rack.
1.4.1 Tubing umbilical
The tubing umbilical supplies purge air, dilution air, calibration gas, and the sample return line
for the analyzers in the analyzer rack. Purge air is supplied by the 1/2" black polyethylene
tube at 60 PSI to the valve manifold. Dilution air is supplied by the 1/4" black polyethylene
tube at 60 PSI to the dilution air regulator. Calibration gas is supplied by a 1/4" clear Teflon
®
tube at 30 psi (limited to 2500cc/minute by flow orifice) to the calibration gas inlet on the
valve manifold. The sample outlet is connected to a 1/4" clear Teflon
®
tube, to supply the