Hach DR300 Service Manual

Figure 5 Sample cell orientation
1 Orientation mark
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2 Sample cell, 25-mm (10 mL), glass
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3 Sample cell, 1-cm (10 mL), plastic
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Figure 6 Install the instrument cap over the cell holder
3.3.1 Download a test procedure
1. Go to http://www.hach.com.
2. Enter "DR300" in the Search box.
3. Select the applicable instrument from the list.
4. Click the Downloads tab.
5. Scroll down to "Methods/Procedures".
6. Click the link for the applicable test procedure to download it.
3.4 Show measurements
Note: The instrument saves a maximum of 50 measurements. After 50 measurements are done,
new measurements replace the oldest measurements.
1. Push and hold for 3 seconds.
2. Push until "rCL" (recall) shows, then push .
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Some variants of the instrument have sample cells without an orientation mark.
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Use the glass sample cell for low-range chlorine tests.
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Use the plastic sample cell for high-range chlorine tests.
Startup
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Hach DR300 Specifications

General

Type	Portable Spectrophotometer
Operating Temperature	0 to 50 °C
Method	Pre-programmed methods
Light Source	LED
Wavelength Accuracy	±2 nm
Resolution	0.001 Abs
Display	LCD
Measurement Method	Absorbance
Parameter	Various
Photometric Range	0 to 2.5 A
Dimensions	230 x 93 x 280 mm (9.1 x 3.7 x 11.0 in)
Photometric Accuracy	±0.005 Abs