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Section 7 - Instrument Care and Maintenance
for each channel.
Current Cal RTD – Calibrate the unit‟s current excitation source. Apply a 250 Ohm precision resistor. Doing
this on one channel calibrates all channels.
1 Hz Cal – Calibrate the units frequency reference. Apply a 1 Hz signal to channel 1, 6, 7 or 12. Doing this
on one channel calibrates all four channels.
Store Cal – This saves the new calibration settings into non-volatile memory.
Set Channel:
Calibrate: Perform the calibration – This is non-reversible.
Live Data: Shows the actual live input on the selected Channel.
Restore Factory Calibration:
from the factory by pressing the "Restore" button
Note: Restoring the factory calibration values may negate the current calibration of your unit unless the
factory calibrates the unit on a regular basis.
7.3.1 Calibrating Linear Voltage Inputs:
You will need a shorting jumper (no connection to COM) and the voltage calibrator.
7.3.1.1
Set Channel
Select the Channel the calibrator is connected to and
select the Voltage Range to be calibrated from the
drop down menus and press the "Set Chan" button.
7.3.1.2
Zero Cal
Select the Zero Cal function from the Calibration
Function drop down menu.
"Calibration Function OK" popup dialog. Press "OK" in the top right corner.
7.3.1.3
Full Cal
Select the Full Cal function from the Calibration Function drop down
menu.
Select the Range to be calibrated from the Range drop down menu.
Apply the Full Scale Input voltage for the selected range from the table
to the right. The output of the calibrator is connected to the IN+ and
IN- inputs on the selected channel. There is NO CONNECTION to
COM. (See
Wiring Section
scale calibration value is greater than the voltage range. The "Live
Data" window will show the current value from the connected source.
Press the "Calibrate" button to complete the calibration. Doing this on
Activate the Channel to be calibrated. This will enable the Live Data.
Will restore the calibration data that was in effect when the unit shipped
The "Live Data" window will show the
current value from the connected
source and a "Channel has been set
popup
successfully"
Press "OK" in the top right corner
Apply 0 Volts (Shorting jumper or
set Calibrator to 0V) to the channel
selected in step one and press the
"Calibrate" button.
one channel calibrates all channels. On completion of the step you will get a
for connection detail). Note that the full
will
appear.
Doing this on
Page 96
Figure 7.2 – Calibration Window
Voltage Range Full Scale Input
±125mV
±250mV
±500mV
±1.00V
±3.00V
±6.00V
±12.00V
±24.00V
146mV
292.5mV
585mV
1.170V
3.125V
6.250V
12.50V
25.00V
09/11/2008 REV 0.99
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