Section 6: Troubleshooting; Troubleshooting - Emerson Rosemount 3200HP Instruction Manual

Instruction Manual
LIQ-MAN-3200HP

Section 6: Troubleshooting

6.1

Troubleshooting

Table 6-1: Troubleshooting
Trouble Probable Cause
pH reading is in Electrolyte flow is too low bubbles are
error blocking flow or the inside membrane on
the capillary disc is fouled with biological
growth.
Capillary is plugged.
Sensor was not properly calibrated.
Noisy reading Sample flow is too high.
Sensor is not properly oriented in flow cell. Orient sensor so that capillary disc faces the front.
Electrolyte flow is too low – bubbles are
blocking flow or the inside membrane on
the capillary disc is fouled with biological
growth.
pH readings Sensor is dirty.
drift
Unstable sample.
Note: For any repair or warranty inquiries please contact our Customer Care group.
Diagnostics and Troubleshooting
Remedy
1. Remove air bubbles. Refer to step 11 in the
Rosemount 3200HP Sensor in Service (Section
2. Discard the fill solution in the reservoir and sensor. Rinse the
reservoir and sensor with fresh fill solution. Replace with fresh
solution. Replace reservoir filter.
Replace capillary.
Check buffers for freshness and replace if necessary. Pay partic-
ular attention to alkaline buffers, which can become contami-
nated with atmospheric carbon dioxide. Review calibration
procedure and repeat calibration.
Adjust sample flow to between 1 and 3 gph (60 to 180 mL/min).
1. Remove air bubbles. Refer to step 11 in the
Rosemount 3200HP Sensor in Service (Section
2. Discard the fill solution in the reservoir and sensor. Rinse the
reservoir and sensor with fresh fill solution. Replace with fresh
solution. Replace reservoir filter.
Clean the outside capillary filter by rinsing with deionized water.
Clean the pH glass bulb by rinsing with dilute hydrochloric acid.
Recalibrate the sensor after cleaning.
Fluctuations in sample flow can cause slight changes in pH
reading. Keep sample flow constant. Be sure the sample drains
immediately to open atmosphere.
Troubleshooting
April 2017
Putting the
2.3).
Putting the
2.3).
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