Panametrics HydroProII, User Manual

Page: 47 / 104

HygroPro
II
User's Manual 35
Chapter 3. Service and Maintenance
3.3.5 Cleaning the Sensor and the Shield
1. While wearing protective gloves, place the sensors on the probe in the first container of Hexane or Toluene and
allow them to soak for 10 minutes.
2. Remove the sensors from the Hexane or Toluene and soak them in the container of distilled water for 10 minutes.
3. Remove the sensors from the distilled water and soak them in the second (clean) container of Hexane or Toluene
for 10 minutes.
4. Remove the sensors from the Hexane or Toluene and set the probe aside in a clean area.
5. Repeat steps 1 to 3 to clean the shield. To ensure the removal of any contaminants that may have stuck to the
walls of the shield, swirl the shield in the solvents during the soaking procedure.
6. Remove the shield from the Hexane or Toluene.
7. Carefully replace the shield over the exposed sensors without touching them.
8. Place the probe, i.e., cleaned sensors with the installed shield, in an oven set at 50°C ± 2°C (122°F ± 3.6°F) for
24 hours.
3.3.6 Installing the Probe in the Transmitter
To install a new, recalibrated or cleaned probe back in the transmitter, see Figure 19 below. This procedure requires
completing the following steps:
1. Ensure the two shoulder screws at the bottom of the display head are fully loosened.
2. Reconnect the M8 probe cable to the top connected of the probe by turning the locknut.
3. Carefully push the probe into the transmitter while gently twisting it clockwise when looking from the shield end.
4. Ensure that the probe is properly seated in its slot without either O-ring protruding from the bottom of the display
head.
5. Tighten the two captive shoulder screws all the way into their slots at the bottom of the display head.
Figure 19: Reinstalling the Hygro
II
RTE probe into the dismounted transmitter
CAUTION!
Do not place the display head/transmitter module into any of the solvents. Insert only
the sensor portion of the probe. Do not allow the Aluminum Oxide sensor to come into
contact with the surfaces of cleaning containers or with any other hard surface.
CAUTION!
Please check both the probe sealing O-rings (2X Silicone) and the process sealing
O-ring (Viton) on the probe mount prior to installing or re-installing a HygroPro
II
into
the process. These transmitters should be supplied with a new process O-ring after
each recalibration to ensure safe and reliable process seal.