Adjusting The 'Emissivity' Setting - Ametek LAND RT8A User Manual

Thermometer

4.3 Adjusting the 'Emissivity' Setting

To ensure that the Land RT8A thermometer makes consistent accurate
temperature measurements, an emissivity correction value must be set in the
thermometer which accurately corresponds with the target under observation.
The emissivity value can be set in the range 0.10 to 1.00 in adjustable
increments of 0.01. The thermometer is supplied with the emissivity value
pre-set to 1.00.
To set the emissivity value:
• Remove the screw-on cap covering the control switches.
• Set the emissivity value using the 'SW1' and 'SW2' switches (see Fig. 7).
Switch 'SW1' denotes the first figure after the decimal point of the
emissivity value.
Switch 'SW2' denotes the second figure after the decimal point of the
emissivity value.
e.g. for an emissivity value of '0.87', 'SW1' should be set to '8' and 'SW2'
should be set to '7'.
When switch 'SW1' is set to '0', this denotes a '1' before and a '0' after the
decimal point of the emissivity value.
e.g. for an emissivity value of 1.00, 'SW1' should be set to '0' and 'SW2'
should be set to '0'.
• Refit the screw-on cap covering the control switches.
Emissivity
Example = 0.85
Response Speed
Fully anti-clockwise = 1sec (3t)
Fully clockwise = 10sec (3t)
Fig. 7 - RT8A Thermometer 'Emissivity' an 'Response Speed' Contro
Page 8
SW2
SW1
P1
Emissivity SW1 SW2
0.10 1
0.80 8
0.85 8
0.92 9
1.00 0
Example settings
User Guide
0
0
5
2
0
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RT8A