Omron E5GN - Page 113

CHAPTER 6 CALIBRATION
E5GN
6–8
6.5 Calibrating Platinum Resistance Thermometers
This example describes how to calibrate the E5GN when it is connected to
a platinum resistance thermometer.
When calibrating a platinum resistance thermometer use wires of the
same thickness as those used to connect the E5GN.
(1) Connect the power supply.
(2) Connect a precision resistance box (called 6Ćdial" in this manual) to
the platinum resistance thermometer input terminals.
(3) Turn the power ON.
(4) Move to the calibration level".
This starts the 30Ćminutes aging timer. This timer provides an
approximate timer for again. After 30 minutes, the No.2 display
changes to 0". You can advance to the next step in this procedure
even if 0" is not displayed.
(5) Press the key to display the count value for each input type.
The No.2 display at this time displays the currently entered count
value entered in Hexadecimal. Set the 6Ćdial as follows:
Ăă• Input type 0 : 390 Ω
Ăă• Input type 1 or 3 : 280 Ω
Ăă• Input type 2 or 4 : 140 Ω
(6) Allow the count value on the No.2 display to fully stabilize, then press
the key to temporarily register the calibration setup.
(7) Press the key to set the E5GN to the state on the left.
Set the 6Ćdial as follows:
Ăă• Input type 0 : 10 Ω
Ăă• Input type 1 or 3 : 10 Ω
Ăă• Input type 2 or 4 : 100 Ω
(8) Allow the count value on the No.2 display to fully stabilize, then press
the key to temporarily register the calibration setup.
(9) Press the key. The No.2 display changes to the state on the left.
Note that the data to be temporarily registered is not displayed when
it is not entirely prepared.
Press the key. The No.2 display changes to  ". Release the key
and wait two seconds or press the
key. This stores the temporarily
registered calibration data to nonĆvolatile memory (EEPROM). Data
will not be stored to memory if you press the
key with  " disĆ
played on the No.2 display.
(10) The calibration mode is quit by turning the power OFF.
6-dial
AB
123456
B
789
Input power
supply
Input types 2, 4
Input type 0
Input types 1, 3
Input types 2, 4
Input type 0
Input types 1, 3