Servomex NanoTrace DF-760E, Инструкция по эксплуатации

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136 DF-745 Theory of Operation
Service
H Empty electrolyte, rinse sensor thoroughly with DEIONIZED water, and refill sensor with fresh electrolyte. Allow the
sensor to sit for 60 minutes before flowing gas or powering up. Restart analyzer on zero gas and allow a minimum of 4
days for the analyzer to purge down.
I Contact the Servomex Customer Support for additional assistance with the results of the troubleshooting.
J Adjust Filter Settings to Ultra Low LDL. Transient Rejection ON.
L Adjust Filter Settings to Normal, Transient Rejection OFF
N Make sure sensor cap is secure.
O Check for purifier breakthrough. With the on-board purifier in-line, obtain stable oxygen readings at a flow rate of 2.0 scfh
and at a flow rate of 0.5 scfh. The reading at 2.0 scfh should not be higher than the reading at 0.5 scfh. If it is, replace
the purifier.
P This is typical Analyzer behavior following a start-up. Perform a Manual or Auto Zero Calibration.
Q Examine outside of sensor for evidence of electrolyte residue.
R Quantify the drift effect with temperature changes (identify a ± correlation). Appropriately adjust the temperature
compensation set point.
S Make sure the span background gas is properly accounted for using SPAN GSF in the menu.
T Check the accuracy and age of the calibration reference cylinder.
V Perform a low flow leak test while the span gas cylinder is connected. Obtain a stable reading at a flow rate of 2.0 scfh
and at a flow rate of 0.5 scfh. Reading should be lower at 0.5 scfh. If not, investigate for leakage and fix.
X Remove any devices being driven by the analyzer output, i.e. chart recorders or Data Acquisition Systems. Also
disconnect anything controlled by the analyzer alarm relays. Verify proper operation with these devices removed.
Y Verify that a flow rate of 2.0 scfh of zero gas has been established. Allow 10 minutes time after zero gas connection to
come on scale.
Z Assure that spiking is not due to EMI (i.e. radio communications).
AA Remove any devices downstream of the analyzer which may cause backpresssure.
AB Make sure the fan is operating and proper ventilation exists.
9.5.1.3 Moisture Troubleshooting
The DF-700 series moisture analyzer constantly performs internal monitoring of the analyzer
operation. In the event of a failure a system alarm will be displayed on the front panel. In
addition, the failure will be logged in the System Error Log (see page 60). In the event of a
system alarm contact Servomex with information as displayed in the log as well as on the
Signal Monitor screen as shown on page 68.