CODEL EnergyTech 100 Series, Инструкция по установке, пусконаладке, эксплуатации и техническому обслуживанию

Страница: 23 / 76

CODEL
OPS. 141 15
Issue : A
Revision : 1
Date : 14/06/18
Doc i/d :
0118/6
050028
3.5. Gain Adjustment
The receiver (Rx) gain has two stages. The first, adjustable via the keypad, is in
the receiver head and consists of a low (x1) or high (x10) setting. The second
stage is a variable gain within the signal processor (SP) and is adjustable using
VR1 (VR2 is for Dt level). After the equipment has been aligned, the gain may
be set as follows :
•
Enter the SET-UP mode (mode 5) CALIBRATE menu - Set Rx
Gain option.
•
Rx gain can be scrolled HIGH or LOW by the UP and DOWN
arrow keys and entered by the ENTER key.
•
SP gain is adjusted using VR1.
•
View the detector levels from set detectors within the CALIBRATE
menu and progressively increase the gain until a detector level
between 10,000 and 20,000 is obtained.
Note : Always try the RX gain HIGH setting first. If the caption
‘Rx
Det Saturated’
appears, then switch to Rx LOW to remove the
saturation.
!
Should the instrument be commissioned when a high opacity is
present in the duct, reduce the level of Dr to between about
6,000 and 10,000. This is to prevent overloading if the opacity
level reduces.
•
Press ENTER to return to the CALIBRATE sub mode. Press
MODE to return to the unit to operating condition, i.e. MODE 1 .
3.6. Basic Calibration
Before the instrument can calculate the correct opacity within the duct, a basic
calibration routine must be conducted.
Select the set up mode and conduct a basic calibration, detailed below. Section
4.9. Calibrate contains a fuller description. Record the calibration data in the
table at 3.8. Calibration Data.