Shimadzu IRAffinity-1, Instruction Manual

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5.1 Start-Up Inspection and Periodic Inspection
5-3
IRAffinity-1
Fig. 5.1 Dry Indicator
5.1.1.2 Silica Gel Check
Lift up the back side of the Top cover ( Fig. 5.2 ) and then pull it up to remove the top cover. Confirm
that the color of the Silica gel is blue not red.
The color of Silica gels turns into red from blue as they absorb moisture. They should be replaced
when the color has become lavender color (purple).
Put the top cover on the FTIR after checking.
If the color of the Silica gel becomes red, the Dry unit does not work normally. The humidity in the
interferometer becomes high and the optical elements will be damaged.
In this case;
1. Disconnect the power cord immediately and do not use your IRAffinity-1.
2. Remove the Top cover and replace the silica gel packages.
3. Please contact your SHIMADZU representative.
NOTE
This check must be done before turning ON.
NOTE
IRAffinity-1 includes a Dry unit to desiccate in the interferometer. It also includes Silica gel to
provide for cutting AC power supply. Because the humidity inside of the interferometer is usually
lower than 20% RH and Silica gel stops moisture absorption, replacement of Silica gel is not
needed while the dry unit is working. Please check the color of the Silica gel periodically to
provide for unusual situations.
Dry Indicator