Hach-Lange REFO 3_REFO 3D - Manual (Page 18)

Operating Instructions REFO 3 / REFO 3-D
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Dr. Lange Nederland B.V. Laan van Westroijen 2a NL-4003 AZ Tiel
Tel.: (0344) 631130 Fax: (0344) 631150
D4 Interface
REFO 3 / 3-D has a serial interface installed to send the display data to an external
device. Moreover, REFO 3 / 3-D is suitable for remote control with an external de-
vice. The serial interface features Baud rate = 2400 Bit/s
Format of a transferred string:
1 start bit 8 data bits 1 parity bit 2 stop bits
Further information on the transfer is given in our detailed description of the REFO 3 /
3-D interface which we will send you on request.
D5 Maintenance of the Standard
Poor accuracy or repeatability of measurings is often due to improper handling of the
working standards. Gloss being a surface property, utmost cleanliness is of vital im-
portance. Even slight irregularities invisible to the naked eye may cause mismeasu-
rements (nicotine, dust, fingerprints, scratches). The standards are possible to clean,
but very carefully not to damage them.
One way of cleaning them is to spray glass cleaning agent on the standard surface
and wipe it carefully with soft tissue clean and dry.
Attention:
Do not touch the standard surface with your fingers when cleaning it.
The calibration values of the standards remain valid for two years. After the expiry of
this term, changes may occur.
D6 Fact Sheet
Viewing geometries: 20°, 60°, 85°
Measuring surfaces: 20° approx. 9 x 9 mm
60° approx. 17 x 9 mm
85° approx. 100 x 10 mm
International
calibration standards: standard A, metal standard
Power supply: mains/batteries
Data output: RS 232 C
PC-Software: REFO QC
Dimensions: 200 x 56 x 80mm L/W/H
Weight: 750g
Warranty: 3 years