12
8.
SETTING OF SETPOINT
To use the setpoint, make necessary settings according to the following procedure.
(Both setpoints 1 and 2 have been factory set at near 1.0
×
10
-2
Pa(7.5
×
10
-5
Torr)
(approx. 8.4 V).
ST-
①
Connect pin 1 [+24V power] and pin 9 [power GND] of the I/O connector of SC1 and
connect a voltmeter between the setpoint set value and GND.
When setpoint 1 is set: Between 7-pin [setpoint l set value] and 10-pin or 15-pin [GND]
When setpoint 2 is set: Between 14-pin [setpoint set value 2] and 10-pin or 15-pin [GND]
(In the case of setpoint 1)
ST-
②
The set voltage is output between the setpoint set value and ground by turning the
setpoint setting trimmer.
The output voltage is the same as on the measured pressure curve. Read the voltage
value of a pressure point to be set from the conversion table (graph on Fig. 9-1, Fig. 9-2
or list on page 36) and turn the trimmer for adjustment so that the voltage is obtained.
Turning the trimmer clockwise increases the set value. The trimmer is a three-turn
trimmer. If it is turned above the higher or below the lower limit of rotation, it will
click and be idle.
Voltmeter
Voltmeter
SET-1
setting
trimmer
POWER
PROTECT
HV
SET-1
SET-2
ULVAC
G-TRAN
SC1
Summary of Contents for G-Tran BMR2
Page 2: ......