Decimal Fix; Filter; Compensation - Omega RD8800 User Manual

Chapter 5 Programming

5.6.5.5 Decimal fix

Certain points must be assigned a decimal place of up to four places or scientific notation. The choices are:
0 = X (no decimal places)
1 = X.X
2 = X.XX
3 = X.XXX
4 = X.XXXX
5 = Scientific Notation (Decimal places affect displayed point data values only)
To program the Decimal fix:
From the Point Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Decimal fix and press the
ENTER button. You will be prompted with "places? X". Use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to set the
desired number of decimal places and press the ENTER button to return to the Point Setup menu.
NOTE: Thermocouple (T/C) points must be assigned a decimal place of either 1 or 0. This enables
temperature to be displayed with a resolution of either 1 degree (0) or 0.1 degree (1).

5.6.5.6 Filter

The digital Filter smooths noisy or erratic signals by attenuating the effects of sudden transitions. The
digital Filter is programmable from 0 to 30 seconds in one second increments (nominal).
To program the digital Filter:
From the Point Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Filter and press the ENTER
button. You will be prompted with "seconds XX . Use the numeric keypad to enter the required number
of seconds (maximum 30) and then press the ENTER button to return to the Point Setup menu.

5.6.5.7 Compensation

Thermocouple Compensation can be Local, from the cold reference junction temperature sensor built into
the Recorder, or External through a direct input. When thermocouples are compensated Locally, the
temperature sensor (located on the rear terminal panel of the Recorder) measures the ambient
temperature of the cold junction. For remote compensation, a single Thermocouple or RTD can be used to
measure the ambient temperature of the remote junction box. This method allows several thermocouple
points to be measured without using thermocouple extension wire for each input. The point used as the
measurement source of the remote cold junction source is referred to as the compensation channel.
The point used as the compensation channel must be programmed before the Thermocouple or RTD input
is assigned to it.
To program the Compensation:
From the Point Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Compensation and press the
ENTER button. Use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to select either Local comp or Ext comp and press
the ENTER button. If Local comp is chosen, just press the EXIT button to return to the Point Setup
menu. If Ext comp is chosen, you will be prompted with "ext point? X". Use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button
to scroll through the point numbers to choose the input where the external compensation is input. When
the desired point number is displayed, press the ENTER button. Then press the EXIT button to return to the
Point Setup menu.
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
Page 5-13