CTPH -Maintaining the Recorder

MAINTAINING THE RECORDER

General Considerations

Keep the recorder in a dry place. If it gets wet, wipe the case as soon as possible to get rid of any moisture.	Do not expose the recorder to temperatures other than those stated in the specifications (Chapter 11). The recorder can operate in temperatures as high as 120░F (49░C) or as low as 32░F (0░C).
Handle the recorder carefully (DO NOT DROP IT).	Do not use strong cleaning solvents or alcohol when cleaning the outer case. Refer to Section 8.3 for more details.
Do not use old or weak batteries in the recorder. It is important to change the batteries monthly or when you see the LO BAT indicator (refer 2.3.1).	Keep the recorder away from excessive dirt and dust.

Light Bulb and Push Button Information
You may notice that the light bulbs flicker slightly while the pens are moving. The flickering stops once the pens are stationary.

Figure 8-1.
How to Hold the Bulb Assembly
and Where the Bulbs are Located

The light bulbs on the chart base of the recorder are long-life specialty bulbs. Even though they last a very long time, they will burn out eventually. Always replace both bulbs. The part number for ordering 10 bulb/holder assemblies is listed on the inside back cover. One extra pair of bulb assemblies is supplied with the recorder.

When removing the bulbs, grasp the bulb holder that contains the bulb and pull it out. Do not pull on the bulb itself. When reinserting the new bulbs in the sockets, orient the bulbs to fit as shown in Figure 8-1.

NOTE: In the event that the ac power to the recorder is cut off (e.g., blackout), the recorder will continue to operate with the 4 ôDö size backup batteries. The bulbs operate on ac power only.

Figure 8-2. Push Button Location

The recorder is equipped with a push button located on the chart base. This push button turns on and off the light bulbs which are used for illuminating the chart. One press of the push button turns on the bulbs and a second press turns them off. Figure 8-2 shows the location of the push button.

Case Care
The case, front window and pen arms of the recorder should be cleaned with a mild soap solution. Under no circumstances should you use an alcohol or solvent based cleaner anywhere on this recorder.

Storage of Chart Paper
For optimum performance, store the chart paper in the plastic bag provided. Store the paper in rooms that have humidity levels lower than 80% relative humidity.

Power Failure Mode (Chart Paper Indication)
The chart paper indicates when the ac power failure occurred, the battery back up period and when the ac power returns. It is important to have fresh ôDö size batteries in the recorder for battery backup so you have continuous recording. Figure 8-3 shows an example of chart paper with the power failure lines.

Figure 8-3. AC Power Failure Indication on Chart Paper

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