Jenway 6300 Ser Man
16
A to D Calibration.
Hold the <Print> key depressed while turning
on the power. This enables the A to D converter on the detector
PCB to be calibrated against an external precision voltage source.
See Section 8.5.
Diagnostics Mode.
Hold the <right arrow> key depressed while
turning on the power. The main display shows the signal from the
detector in mV and the resolution of the wavelength display is
increased to 0.5nm. See Section 7.1. Further special key functions
are invoked in the diagnostics mode as follows;
<right arrow>
Further presses of this key will toggle the dark
shutter open and closed. See Section 7.2.
<left arrow >
Alternate presses of this key will reduce the lamp
voltage to 5V (dim) and then return it to 12V. See Section 7.3.
<Cal>
This key is used to set the wavelength display to 0.0 with
the grating in a position where white light (zero order) is reflected
on to the detector. A second press of this key is required to confirm
the setting before resuming the normal diagnostic functions. See
Section 7.4.
<print>
Alternate presses of this key will toggle the Infra-red filter
in and out of the light path. See Section 7.2.
2.7
Test Solutions
1.
Holmium Perchlorate – 5% w/v solution of Holmium Oxide in 1.4N
Perchloric acid, this will give absorbance maxima at 361.4, 416.1,
451.1, 485.3, 536.5 and 640.5nm.
2.
Potassium Dichromate – 100.0mg/l in 0.005M Sulphuric Acid (use the
Sulphuric Acid as the blank). This will give an Absorbance value of
1.071 at 350nm.
Potassium Dichromate – 50.0mg/l in 0.005M Sulphuric Acid (use the
Sulphuric Acid as the blank). This will give an Absorbance value of
0.536 at 350nm.
3.
Sodium Nitrate – 50g/l in deionised water, should give less than 0.1%
Transmittance at 340nm.
All these solutions are hazardous and the manufacturer/suppliers
safety precautions should be carefully followed at all times in
preparation, use and storage.
