Crystal care and handling, Crystal, Care – INFICON PLO-10i Phase Lock Oscillator User Manual
Page 41: Handling -7, Igure, Requency vs, Emperature of inficon, At-c, Rystal for, C -7
PLO-10 PHASE LOCK OSCILLATOR
CRYSTALS, HOLDERS AND FLOW CELL
7-7
Figure 12 Frequency vs. Temperature of INFICON 1" AT-Cut Crystal for 90 C
Freq Change vs. Temp
INFICON
AT cut for 25C
-25
0
25
50
75
100
125
150
175
200
225
250
275
0
10
20
30
40
50
60
70
80
90
100
110
120
Temperature ( C)
Delta Frequency (Hz)
Figure 13 Frequency vs. Temperature of INFICON 1" AT-Cut Crystal for 25 C
7.2 CRYSTAL CARE AND HANDLING
It is essential that a sensor crystal is clean and free of foreign matter that may react with
the experiment inducing errors in the measurements. The following guidelines are
recommended for general handling of the sensor crystals.
♦
Keep the crystals in a clean environment. Store them in their original package until
use.
♦
Never handle the crystals with bare hands.
♦
Always use plastic tweezers around the edge of the crystal during handling.
♦
Do not touch the center of a sensor crystal, as any oil, dirt, dust, or scratches will
quickly degrade the quality of the crystal.
♦
When using a chemical agent to clean the crystal, ensure that the crystal electrode
material(s) will not be damaged by the chemical.
♦
Never use cleaner that will etch the quartz surface.
♦
Always rinse with deionized water, or another appropriate pure liquid, before drying
the crystal.
♦
Always use a flow of dry, oil-free, non-reactive gas (e.g. filtered nitrogen) to blow-