General Specifications; Ranges Five Linear Ranges; Meter; Response Time - Thermo Scientific RO-20 Operating Manual

1.4

General Specifications

1.4.1

Ranges Five linear ranges

• 0–5 mR/h
• 0–50 mR/h
• 0–500 mR/h
•
0–5 R/h
• 0–50 R/h
1.4.2

Meter

• Scale length: Approx. 3 in. (7.6 cm)
• 2% accuracy.
• Linear markings: From 0 to 5 in 50 minor increments.
• Back-lighted.
1.4.3

Response Time

Five seconds, 0 to 90% of final reading.
1.4.4

Linearity

• Within ± 5% of full scale
• Battery Dependence (Within ± 5%)
• The reading is independent of battery voltage when the battery check indications are in
the green arc. In order to achieve, but linearity in the 50R/h Range, it is recommended
to exchange the 3 ea 12 Volt batteries (indicated by "Battery 2") once the needle falls
below "4.0".
1.4.5

Controls

1.4.5.1

External

• Function Switch with Off, Zero, and Battery checking positions.
• The Zero Knob is used to set the meter to zero when the Zero position of the Function
Switch is selected, or when the detector is not in a significant radiation field.
1-4 RB-XXX-XXXXXX E RO-20
Löw 08.10.2008