33
Is the sample deteriorated by
the light emitted from the light
source?
Use the shutter function or
narrow the spectrum
bandwidth.
Is the variation of the peak
value of aqueous solution of
ammonium d-10-camphor
sulfonate (distilled water, 10
nm cell) at 291.0 nm within 2
mdeg/hr?
Normal.
Are room temperature and
humidity variations normal?
Maintain room temperature
within 20
±
5
°
C, and humidity
below 70%.
Is the instrument blown with
draft from an air conditioner or
other?
Install the instrument in a
position outside of the direct
path of air currents.
Is the scanning speed too
high?
Slightly lower the scanning
speed.
Is noise too high?
Increase response. Or,
refer to the
″
Noise is high
″
symptom.
Wavelength
repeatability is low.
Is the instrument warmed up
sufficiently?
Measure wavelength
repeatability after warming
up the instrument for
approximately one hour
after the light source is lit.
Are room temperature and
humidity variations too high?
Maintain room temperature
within 20
±
5
°
C, and humidity
below 70%.
No communication
with the computer.
Is the RS-232C cable
connected properly?
Reconnect the cable
correctly.
Is the communication port
setting in agreement with the
wiring?
Correctly set the
communication ports.
