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10.
COLD CATHODE GAUGE SC1
This section describes the operation of the cold cathode gauge SC1.
Before reading this section, go through the standard operating procedure described in the
preceding sections and the manual for the sensor unit.
10.1.
Setting the Sensor Unit
Turn on the power to this unit and make sure that “Sc1” blinks for about 3 seconds.
In any other display appears, press the
key within 3 seconds after turning on power and,
after changing the display to “Sc1”, make it definite with the
key. Refer to Section 6 for more
information about the sensor unit setting.
10.2.
Front Panel
10.2.1.
Pressure display
Condition
Pressure display
LED
In normal measurement
1.0
×
10
-5
Pa to 1.0
×
10
+0
Pa
Below measurement pressure range
0.0
×
10
-5
Pa
Below measurable greatly lower limit
*1
HuO
Above measurement pressure range
HuO
When HV is OFF, when power is turned on
HuF
Immediately after HV is turned on
HuO
When discharge check signal is not yet connected
*2
Pressure indication
Err blinks
When sensor unit is not connected
- - -
Err lights
*1: Below measurable greatly lower limit. Cf. instruction manual of SC1.
*2: The discharge check signal indicates that discharge current is flowing normally.
The setpoint of this unit is not actuated unless this signal is input.
10.2.2.
Front panel key description
Name (notation)
Function
Remarks
PROG
Enters into the program mode
Refer to Section 5 and this section.
ZERO
Not used
DEG
Not used
FIL
HV ON/OFF operation
Cannot be operated when RS485 and
external I/O are set
10.3.
Settings Operation
The following settings are available for turning ON/OFF high voltage.
Setting
Overview
Front panel operation mode
Only the front panel can be operated.
External I/O operation mode
Only external I/O can be operated.
RS485 communication mode
Only RS485 communication can be operated.
10.3.1.
RS485 communication operation setting “L1”, “L2”
Select whether HV ON/OFF is to be operated by RS485 communication or not.
Refer to Section 22 for detailed setting of RS485, commands and others.
Display
Detail
Remark
“L1”
Operation of front panel and external I/O
RS485: Pressure reading only
“L2”
Only RS485 communication operation
10.3.2.
Front panel, external I/O operation setting: “Hi”
Selects whether HV ON/OFF is to be operated on the front panel or with external I/O.
Display
Detail
“HiF”
Only operation on front panel
“Hio”
Only operation of I/O
Summary of Contents for G-Tran ISG1
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