Set Gain To Unity (Technicians Only!); Preamp Gain Adjust (Technicians Only!) - Oldham OLCT 200 User Manual

Figure 7-2: Catalytic Bead BALANCE & SENSOR VOLTS Adjust Menus

7.3 Set Gain to Unity (Technicians only!)

Set Gain to UNITY allows resetting previous calibration OFFSET to zero and GAIN to
one. This is the definition of UNITY. A calibration should be performed after setting
UNITY.
* * * * * WA R N I N G* * * * *
P r e v i o u s
w i l l
E D I T
N E X T

7.4 PreAmp Gain Adjust (Technicians only!)

Depending upon Input Type, OLCT 200 inputs range from a few micro amps to
hundreds of micro amps. PreAmp Gain Set is the adjustment that matches the input
signal range to the OLCT 200 input signal conditioning circuits. Altering the PreAmp
Gain setting automatically resets previous calibration OFFSET & GAIN values to
UNITY as described in section 7.3.
If it is determined the PreAmp Gain value is incorrect, apply the desired up-scale input
and use the UP / DOWN keys to obtain the correct Reading value. Counts are the
10-bit binary A/D value with an active range value of 0 - 1023.
CAUTION: For standard installations, this is a factory adjustment. Do not use the
PreAmp Gain Set menu for calibrating sensors. It should only be adjusted if a new
measurement gas or input range is required.
C a l i b r a t i o n
b e e r a s e d .
t o c o n f i r m.
t o e x i t .
Figure 7-3: Set UNITY GAIN Menu
Ga i n
C o u n t s
R e a d i n g
U p / D n
N e x t
Figure 7-4: PreAmp Gain Adjust (PGA) Menu
OLCT 200 User Manual | 65
EDIT
P GA S e t u p
2 5 . 0 %
10 11
10 0
t o C h a n g e .
t o e x i t .
Ga i n = U n i t y