Thermo 49i - Calibrating the Input Channels to Full Scale

Servicing
Analog Input Calibration
6-16 Model 49i Primary Standard Instruction Manual Thermo Fisher Scientific
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.
Calibrating the Input
Channels to Full Scale
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 6-6 shows the analog input pins and Table 6-5
identifies the associated channels.
2. From the Main Menu, press to scroll to Service, press >
to scroll to Analog Input Calibration, and press .
The Analog Input Cal screen displays input channels 1-8.
3. At the Analog Input Cal screen, press to scroll to the channel
selected in Step 1, and press .
4. Press to scroll to Calibrate Full Scale, and press .
The screen displays the current input voltage for the selected channel.
5. Use and to enter the source voltage, and
press
to calibrate the input voltage for the selected channel to the
source voltage.