GRAPHTEC GL840 User Manual page 31

Item
Thermocouples
Resistance bulb
A/D resolution
Filter
Terminal arrangement and signal type (Screwless terminal: B-564SL)
CH1
+
-
b
Wiring diagram (Screwless terminal: B-564SL)
DC voltage input
+
DC voltage
-
Resistance bulb input
The lead wire resistance per line should
be 10Ω or less, and the resistance values
of the three lines should be equal.
+ .....................................High-voltage terminal (terminal for high-voltage input signals)
- ......................................Low-voltage terminal (terminal for low-voltage input signals)
K, J, E, T, R, S, B, N, C (WRe 5-26)
Pt100, JPt100, Pt1000 (IEC751)
16-bit (Effective resolution: Approx. 1/40,000 of the +/- range)
Off, 2, 5, 10, 20, 40
Filter operation is on a moving average basis.
The average value of the set sampling count is used.
If the sample interval exceeds 30 seconds, the average value of data
obtained in a sub-sample (30 seconds) is used.
CH20
A
+
B
-
b
b
Description
Thermocouple input
Compensation wire
DC current input
+
-
Shunt resistance
Ex: For 4-20mA, add 250Ω (± 0.1%) and measure
in the 1 - 5V range.
CHAPTER 2 Checks and Preparation
+
-
2-7