ChromeGate 3.3.2 Software Manual - KNAUER Advanced Scientific ...

Creating an Instrument Control Method 151
Fig. 225 Diagnostics window of Diode Array Detectors
Integration Time [Range 12 –1000] msec
The integration time is the time interval when the detector “accumulates”
light to receive one spectrum. This value is a measure of the intensity of
light originating from a lamp. The more light that passes the optical
scheme and the cell, the shorter the integration time will be. The
integration time depends also on the specific spectral interval (Scan)
selected for the measurement, since the maximum of intensity may be
varied. The integration time range is defined by the device parameters
(see K-2700 / 2800 device specific data). Click the button to determine
the optimal integration time. You can use this measurement to check
quality of the lamp and used optical elements. If the software cannot find
an optimum integration time, the lowest time of the range (i.e. 12) will be
shown.
The integration time will be checked before every run. If there not enough
light can be detected, a single run will be aborted with an appropriate
error message. In a sequence run, the sequence will not be aborted and
the data will be acquired, but ChromGate will enter a message into the
instrument activity log, that there was not enough light.
Lamp
Select the lamp you want to check. This option is not enabled for the K-
2700 detector. The choices are Deuterium and Halogen lamps.
Scan, nm [Range 189 – 1024 nm]
This area is used to specify spectral parameters used for your test
measurements. The range displays the minimal and maximal
wavelengths available for the detector. The minimal and maximal
wavelengths are the limits which are defined by the configuration of the
detector.
The Start of Scan is the minimal wavelength with a default value of 200
nm. The End of Scan is the upper limit of the scans to be measured with
a default value of 500 nm.
The Bandwidth is a measure of the range over which the calculations
and measurements are used to calculate the intensity for a particular
wavelength. For example, with an 11 nm bandwidth, the intensity for 250
nm would be calculated from 245 nm to 255 nm. The wider bandwidth