FT651-059
4
3
Part Names and Functions
1
2
3
4
5
6
Table 2 Part Names and Functions
No. Name
Function
①
D-Sub 15P connector
D-Sub 15-pin connector used for power supply and input-output signals
②
Crystal LED
Indicates the operating status of the crystal gauge
③
B-A LED
Indicates the operating status of the B-A gauge
④
ATM
Trimmer volume control used for adjusting atmospheric pressure (ATM)
⑤
Zero
Push switch used for adjusting the pressure zero point setting (zero
adjustment)
⑤
Controller Electronics
unit
⑥
MX-1 Gauge
head
The crystal LED and B-A LED operate as follows.
Table 3 LED Operation
LED
LED Operation
Content
Cause of Error
Green flashing
Operating normally
OFF
Not operating
No power input, circuit failure
Red illuminated
Controller internal hardware error
Circuit failure
Red flashing 1
Note 1
Crystal unit gauge head error
Gauge head not connected, gauge head failure
Crystal
Red flashing 2
Note 2
Zero adjustment or ATM
adjustment error (the error is
output continuously until
corrected)
Error when adjusting zero:
Zero adjusted at a pressure of 10
-2
Pa or above, or
gauge head contamination
Error when adjusting ATM:
Adjustment is outside of the ATM adjustment range, or
gauge head contamination
OFF Filament
OFF
Green illuminated
Filament ON
Green flashing
Filament and Degas ON
Red illuminated
Emission current error
(The emission current has drifted
±
50% from the standard emission
current)
Filament has blown-out
B-A
Red flashing
Filament protection due to over
range
The pressure has exceeded the measurement range
