Vernier Go Direct UV-VIS Manual Download Page 6

Page: 6 / 7

Wavelength accuracy

± 2.0 nm (as determined with holmium
oxide NIST standard)

Absorbance photometric accuracy ± 5.0% (as determined with potassium

dichromate NIST standards)

Typical scan time

~2 s

Sample format

10 mm × 10 mm cuvette (UV quartz cuvette
included)

Beam height (z dimension)

8.5 mm

Safety

Always wear UV blocking safety glasses or goggles when using this device.
The light source emits ultraviolet radiation and can cause eye damage.

When this instrument is in data-collection mode labeled Intensity, the light
source will be blocked or turned off. Continue to use proper safety precautions.

This instrument contains an internal high-voltage power source. Position the
instrument where the ON/OFF switch can be easily reached. Do not move the
instrument when it is running. Do not attempt to open or remove the case at
any time.

Do not remove or modify any of the installed safety components of this
device. Doing so will create an unsafe operating condition and will void the
product warranty.

No user-serviceable parts are in this device. Do not attempt to open or modify
this device. Contact Vernier for all repairs and service including lamp
replacement.

Handle the device with care. This instrument can be damaged if it is dropped.

Do not use this instrument if it is damaged in any way. Contact Vernier
Technical Support for troubleshooting and technical assistance.

Do not use this instrument for clinical or diagnostic procedures.

Troubleshooting

1. For best results, the absorbance values for all samples must be between 0.1 and

1.0 absorbance units at all wavelengths.

2. Make sure you are using UV-VIS compatible cuvettes if you choose not to use

the enclosed quartz cuvettes.

Find troubleshooting tips here:

www.vernier.com/til/3044

Repair Information

The UV light source in the Go Direct UV-VIS Spectrophotometer is a
deuterium lamp. The lifetime of this source is rated at approximately 1000
hours. Lifetime is defined as the amount of time it takes the lamp to decrease
to 50% of its original output. Deuterium lamp life is also inversely
proportional to the number of ignitions, so it is best to limit the number of
times you ignite the bulb if you wish to prolong its life.

4. Inside the Physics folder, open the Gas Discharge Spectra. Open the desired

file.

You can use the mercury emissions graph to test fluorescent lighting for the
presence of mercury.

Change the Settings in Logger

Pro

The Spectrophotometer dialog box lists all the settings for the device. To display
this box choose Set Up Sensors ► Spectrophotometer from the Experiment menu.

For most experiments, the default settings work well.

There are five parameters listed in the dialog box.

Sample Time: This is similar to the shutter speed of a camera. Logger

Pro

automatically selects the proper sample time during calibration.

Note:

For

emission studies, you may need to change the sample time manually.

Wavelength Smoothing: This is the number of adjacent readings on either side
of a given value that is used to calculate an average value.

Note:

Be careful

adjusting this parameter as it may shift your wavelength values slightly.

Samples to Average: This is the number of readings taken at a given
wavelength to calculate an average reading.

Wavelength Range: The range is determined by the type of Spectrophotometer
in use.

By clicking on the picture of the Spectrophotometer in this dialog box, you will
gain access to four options: calibrate, configure data collection, go to the support
website, and units of measure. Click on an item to select it.

Videos

View videos related to this product at

www.vernier.com/gdx-spec-uv

Specifications

Detection modes

Absorbance, % Transmittance, Raw Lamp
Output, and Intensity (fiber required)

Dimensions

18.5 cm × 17 cm × 7 cm

Lamp power supply

AC adapter (included)

Power consumption

3 A start-up, 500 mA continuous