Servicing
Analog Input Calibration
7-32
Model 48
i
Instruction Manual
Thermo Fisher Scientific
1.
From the Main Menu, choose Service >
Analog Input Calibration
.
The Analog Input Cal screen displays.
Note
If Service Mode is not displayed, refer to “
Accessing the Service
Mode
” on page
7-4
, then return to the beginning of this step.
▲
2.
At the Analog Input Cal screen, press
to scroll to a channel, and
press
.
3.
With the cursor at Calibrate Zero, press
.
The screen displays the input voltage for the selected channel.
4.
Make sure that nothing is connected to the channel input pins and
press
to calibrate the input voltage on the selected channel to
zero volts.
The screen displays 0.00 V as the voltage setting.
5.
Press
>
to return to the Analog Input Cal screen and
repeat Steps 2 through 4 to calibrate other input channels to zero as
necessary.
6.
Continue with the “
Calibrating the Input Channels to Full-Scale
”
procedure that follows.
Use the following procedure to calibrate the input channels to full-scale by
applying a known voltage to the channels.
Equipment Required:
DC voltage source (greater than 0 volts and less than 10 volts)
1.
Connect the known DC voltage source to the input channel (1-8) to be
calibrated.
Figure 7–14
shows the analog input pins and
Table 7–5
identifies the associated channels.
2.
From the Main Menu, choose Service >
Analog Input Calibration
.
The Analog Input Cal screen displays input channels 1-8.
Calibrating the Input
Channels to Full-Scale
