Rtd Accuracy - GRAPHTEC midi LOGGER GL350 Service Manual

5.2.3 RTD Accuracy

Preparation
As shown below, use leads to connect the target amps to the resistor box.
Wiring connection
Measurement procedure (
(1) Load the condition settings file CondRTD.CND as described above.
(2) As shown in the figure above, connect the output of the resistor box to the GL450/400/350's input
terminal.
(3) Use the resistor box to successively set the reference resistance for each range according to the table
below, then check that the level of measurement is within the rating.
Temperature
0 ˚C
400 ˚C
800 ˚C
GL400-UM-251-9370
Connect to +, -, and b terminals of CH2.
AC adapter
RTD accuracy)
Input resistor precision ratings
Resistance value
100 ohm
247.09 ohm
375.51 ohm
5. INSPECTION AND CHECK PROCEDURES
Resistor Box
Standard
-0.5 ˚C to +0.5 ˚C
399.3 ˚C to 400.7 ˚C
799.2 ˚C to 800.8 ˚C
5-9