Filter
Top Products
Section 7 - Instrument Care and Maintenance
Page 96 09/11/2008 REV 0.99
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: Activate the Channel to be calibrated. This will enable the Live Data.
Calibrate: Perform the calibration – This is non-reversible.
Live Data: Shows the actual live input on the selected Channel.
Restore Factory Calibration: Will restore the calibration data that was in effect when the unit shipped
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.
The “Live Data” window will show the
current value from the connected
source and a “Channel has been set
successfully” popup will appear.
Press “OK” in the top right corner
7.3.1.2 Zero Cal
Select the Zero Cal function from the Calibration
Function drop down menu.
Apply 0 Volts (Shorting jumper or
set Calibrator to 0V) to the channel
selected in step one and press the
“Calibrate” button. Doing this on
one channel calibrates all channels. On completion of the step you will get a
“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 for connection detail). Note that the full
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
Voltage Range
Full Scale Input
±125mV
146mV
±250mV
292.5mV
±500mV
585mV
±1.00V
1.170V
±3.00V
3.125V
±6.00V
6.250V
±12.00V
12.50V
±24.00V
25.00V
Figure 7.2 – Calibration Window