Ohmart Vega W-4510, Техническое руководство по аппаратному обеспечению, Страница: 116 / 162

Calibration
W-4510 Weigh Scale Technical Reference Manual 99
Calibration—channel #2 functions
Note: Channel #2 is only used for input from an instrument that tracks belt speed. This input
is then used to calculate mass rate.
There are two options for speed input to calculate mass rate:
•
Tachometer = calibration
•
Line down contact feature that is a constant speed, setup through screen 529
Refer to page 36 for further information concerning the tachometer and line down contact
features.
Step 1: Collecting data for the zero and span
This step sets the upper and lower detector signal limits that are associated with the
endpoints of the calibration. These endpoints display graphically as Cal_lo and Cal_hi. You
do not have to collect data at the endpoints of the calibration, but in general the closer to the
ends the better.
Perform this procedure one time only for the initial calibration. Calibrations that follow the
initial cal use the self-contained absorber.
185 CAL CHANNEL #2
CAL LOW ON PROCESS
CAL HI ON PROCESS
TWO POINT CAL
Figure 47:Cal Channel #2 function screen
Cal Lo on process
187 CALIBRATE LOW
ON PROCESS
CONFIRM START CAL
YES NO
Figure 48: Cal Lo on process screen