Hydro Instruments 210 Series, Инструкция по эксплуатации

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j. Rotate the motor/striker assembly by hand to check for binding and rubbing.
k. Insert the cleaning balls and rotate the striker again by hand. If any rough spots or drag is
noticed, then repeat steps VI.6.g through VI.6.j to readjust the striker.
l. Once no drag is noticed, reassemble by repeating steps VI.6.a to VI.6.c in reverse order.
6. Thermistor: If the thermistor fails, then it will give a very high or very low signal. To test the
thermistor, follow this procedure:
a. Turn off power to the analyzer.
b. Open the analyzer NEMA 4x enclosure and remove the two thermistor wires from the MB128
board (RS1 and AIC).
c. Use an ohm meter to check the resistance of the thermistor. If the ohm meter shows a stable
resistance reading around 10 kohms, then the thermistor is not defective. If the reading is zero or
infi nite, the thermistor is defective and must be replaced.
d. After replacement, thermistor recalibration may be required.
e. If the thermistor fails, the analyzer temperature mode can be set to “Manual” to allow for proper
operation until a replacement thermistor is installed.
7. pH Probe: The pH probe will periodically require replacement. The frequency of replacement is
dependent on the quality of the water. Also, all handling instructions must be followed carefully to
avoid damaging the pH probe. Failure of the pH probe will be indicated by an excessively high or low
reading. If the probe cannot be recalibrated, then it must be replaced. Instructions for replacement
will be included with the replacement pH probes available from Hydro Instruments.
Refer to sections I.1, II.4, VI, and Troubleshooting of this manual.
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