GL900 USER'S MANUAL - Graphtec

Checks and Preparation
Low-voltage input terminal
2.5 Connecting the Signal Input Cables
This section describes how to connect the signal input cables.
Terminal Configuration and Signal Types
CH8............................................CH1
GL900-8
CH4.....................................CH1
GL900-4
High-voltage input terminal
Low-voltage input terminal
Screw type terminal
BNC connector
The screw type terminal and the BNC connector are internally connected. Data entered to either of them can be measured.
WARNING
The screw type terminal and the BNC connector of the
same channel are connected to each other.
Do not input signals to the screw type terminal and the BNC connector
BNC connector of the same channel at the same time.
Doing so may cause damage to the measured device.
GL900
Make sure that the signal input source is OFF before
connecting the cables in order to prevent electric shocks.
When applying voltage of 60V or above, use available safety cable in order to prevent electric shocks.
Screw type
terminals
Connection diagram
Direct voltage input
Thermocouple input
Direct current input
Direct voltage
Compensation
copper wire
Direct current
Shunt resistor
Example: If 4-20 mA is used, connect
a 250 Ω (±0.1%) resistor and measure
it in the 1-5 V range.
CAUTION
Make sure that the GL900 is not pulled by signal input cables when you connect them. The GL900
may fall down if it is pulled.
+ ......................................... High-voltage terminal (terminal for high-voltage input signals)
– .......................................... Low-voltage terminal (terminal for low-voltage input signals)
Item
Description
Input configuration Isolated input
Analog voltage 20, 50, 100, 200, 500 mV/F.S.; 1, 2, 5, 10, 20, 50, 100, 200, 500V/F.S.; 1-5V
Thermocouples K, J, E, T, R, S, B, N, W (WRe 5-26)
A/D resolution 16-bit
Filter
Off, Line, 5, 50, 500Hz
2-6