SK00-7723-EQ-003-01
Metal Ionization Vacuum Gauge
GI-M2
Ionization Vacuum Gauge GI-D7
Quick Manual
Introduction
This quick manual is for quick check of operation and display of the product.
Please refer to instruction manual attached in advance for detailed
information about operation, precautions and safety for proper use.
Available for download from ULVAC website.
https://showcase.ulvac.co.jp/en
This manual is for the following gauges. Serial Nos.
GI-M2
：
S/N32000G
、
GI-D7
：
S/N30030G and higher
1. Setting
1.1. Initial Setting
Mode
Set value
GI-M2
GI-D7
Sensor head setting
SEn
Not used
SnS 1
Sensitivity factor set value
SEn(1)
6.00 -2
8.00 -2
SETPOINT-1
SEt-1
1.00 -0
5.00 -3
SETPOINT-2
SEt-2
1.00 -1
5.00 -4
Range changeover set value
rAn(1)
-8
-7
Degas auto OFF set value
dGS(1)
01
01
Filament
FIL
FIL 1
FIL 1
Analog output
rEC
rEC 1
rEC 1
REC-HOLD set value
rEC
-8
-7
Activated filament setting
Act
Not used
Not used
Baud rate
bPS
9600
9600
1.2. Selection of Sensor Head
（
GI-D7 Only
）
SnS:1
⇒
WIT SnS:2
⇒
WIB
1.3. Selecting the Sensitivity Factor Function
GI-M2
GI-D7
SEn:1
N2
N2
SEn:2
Ar
Ar
SEn:3
Any value
Any value
*: N2 and the Ar sensitivity are calculated by normal sensitivity
1.3.1. Details of Sensitivity Set Values
"Sensitivity" referred to here is the total sensitivity obtained by multiplying the
sensitivity constant (K) of the ULVAC sensor head (M type) for nitrogen by the
relative sensitivity (Srj) for various types of gases, where the sensitivity for nitrogen
is given as 1.
In case of M-11, intrinsic sensitivity 0.05 Pa
-1
(normal sensitivity is 0.06 Pa
-1
)
N
2
: 0.05 Pa
-1
＝
Srj(N
2
)
Ar
：
0.067 Pa
-1
≒
Srj(N
2
) × Srj
＝
0.05 Pa
-1
×1.34
1.4. Setting of SetPoint 1/2
GI-M2
GI-D7
Setiing
range
9.99×10
-0
～
5.00×10
-8
WIT : 6.79×10
-1
～
1.00×10
-5
WIB : 2.00×10
-2
～
1.00×10
-6
1.5. Selection of Range Changeover Function
rAn:1
⇒
AUTO RANGE MODE
rAn:2
⇒
RANGE HOLD MODE
1.6. Setting of Range HOLD
GI-M2
GI-D7
Setting range
-0 ~ -8
-1 ~ -7
1.7. Selection of DEGAS Function
(1) dGS:1
⇒
MANUAL MODE
A single press on the DEGAS switch turns ON degassing and a second press
turns OFF degassing.
(2) dGS:2
⇒
AUTO MODE
A single press on the DEGAS switch turns ON degassing. It is automatically
turned OFF when an arbitrarily designated time elapses. If it is desired to turn it
OFF before the time elapses, press the DEGAS switch, and degassing will be
turned OFF.
1.7.1. Setting of DEGAS Function
Settable numeric values are 01 to 99 minutes.
1.8. Setting of Filament 1/2
FIL:1
⇒
Filament 1
FIL:2
⇒
Filament 2
1.9.Selection of Analog Function
GI-M2
GI-D7
rEC:1
Eeach-digit linear output mode
rEC:2
Pseudo-logarithmic mode
rEC:3
Range hold liniea mode
rEC:4
logarithmic mode
GI-D6 compatibility output mode
rEC:5
Not used
GI-TL3 compatibility output mode
Status
Measurement value output voltage
Filament OFF
0.00V
Filament ON [Em.Valid OK]
Voltage corresponding to measured pressure
Filament ON [Em.Valid NG]
0.00V
When pressure protection is
activated (Filament is OFF)
0.00V
1.9.1. LIN output in each status
Ｐ＝Ｖ
×
１０＾－Ｓ
(Pa)
P: Pressure , V: Output voltage, S:Measured pressure range
1.9.2. GI-M2 Pseudo-LOG output
Ｐ＝１０（Ｖ－Ｅ）
×
１０＾（Ｅ－８）
(Pa
）
P: Pressure , V:Output voltage, E:V from which decimal point is rounded down
1.9.3.GI-D7 Pseudo-LOG output
Ｐ＝１０（Ｖ－Ｅ）
×
１０＾（Ｅ－７）
(Pa
）
P: Pressure, V:Output voltage, E:V from which decimal point is rounded down
1.9.4. Range Hold Linear Output (REC-HOLD)
(by E-4)
1.9.5. Logarithmic Output (GI-M2)
Ｐ＝１０＾（Ｖ－８）
⇔
Ｖ＝ｌｏｇＰ＋８
P: Pressure, V: Output voltage
1.9.6.GI-D6 Compatibility output setting WIT
（
GI-D7 Only
）
Ｐ＝１０
×
（Ｖ－Ｅ）
×
１０＾（Ｅ－５）
(Pa)
P: Pressure, V: Output voltage, E: V from which decimal point is rounded down
1.9.7.GI-D6 Compatibility output setting WIB
（
GI-D7 Only
）
Ｐ＝１０
×
（Ｖ－Ｅ）
×
１０＾（Ｅ－６）
(Pa)
P: Pressure, V: Output voltage, E: V from which decimal point is rounded down
1.9.8.GI-TL3 Compatibility output
（
GI-D7 Only
）
Ｐ＝１０＾（Ｖ／２－５）
(Pa)
P: Pressure, V: Output voltage
2. Nomenclature and Functions of Components
Name (Inscription)
Function
①
POWER
Pressing the top of the POWER switch turns on power
and pressing the bottom turns it off. When the power is
on, the LED in the switch is lit.
②
FIL
Used to turn on/off the filament. The first press on the
key turns on the filament and a second press turns it off.
③
DEG
Used to turn on/off degassing. The first press on the key
turns on degassing and a second press turns it off.
Degassing is automatically turned off after a preset time
when used in the auto OFF mode.
④
F1
Not used
⑤
O PRG
Switch to change over to the setting mode.
Holding down the switch for 2 seconds or more changes
over the measurement mode/setting mode.
⑥
Each press on the switch increments a value by one.
⑦
Shifts a value to the right.
⑧
Used to store a set value in memory.
A set value cannot be changed unless this switch is
pressed because it is not stored in EEPROM.
Name
Function
①
SET1 lamp
Lit when set point 1 is activated.
②
SET2 lamp
Lit when set point 2 is activated.
③
PROTECT lamp
Lit when filament protection is activated by an external
input signal.
④
REMOTE lamp
Lit when the gauge is set in the REMOTE status by
external control (external I/O, RS-232C).
⑤
Em-Lo lamp
GI-M2: Lit when emission current is 10
A.
GI-D7: Not used.
⑥
Em-Hi lamp
GI-M2: Lit when emission current is 1 mA.
GI-N7: Not used.
0
1
2
3
4
5
6
7
8
9
10
1.0E-05
1.0E-04
1.0E-03
O
ut
put
V
ol
ta
ge
(V
)
Pressure (Pa)
Pressure increase
Pressure decrease
1.0E-(N)
1.0E-(N-1)
1.0E-(N-2)
0
1
2
3
4
5
6
7
8
9
10
1.0E-08 1.0E-07 1.0E-06 1.0E-05 1.0E-04 1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01
O
u
tp
u
t
V
ol
tage
(V
)
Pressure (Pa)
0
1
2
3
4
5
6
7
8
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
1.0E-01
1.0E+00
O
u
tp
u
t
V
ol
tage
(V
)
Pressure (Pa)
0.01
0.1
1
10
1.0E-07
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
1.0E-01
1.0E+00
O
u
tp
u
t
V
ol
tage
(V
)
Pressure (Pa)
0
1
2
3
4
5
6
7
8
9
10
1.0E-08 1.0E-07 1.0E-06 1.0E-05 1.0E-04 1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01
O
u
tp
u
t
V
ol
tage
(V
)
Pressure (Pa)
0
1
2
3
4
5
6
1.0E-05
1.0E-04
1.0E-03
1.0E-02
1.0E-01
1.0E+00
O
u
tp
u
t
V
ol
tage
(V
)
Pressure (Pa)
0
1
2
3
4
5
6
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
1.0E-01
1.0E+00
O
u
tp
u
t
V
ol
tage
(V
)
Pressure (Pa)
0
1
2
3
4
5
6
7
8
9
10
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
1.0E-01
1.0E+00
O
u
tp
u
t
V
ol
ta
ge
(
V
)
Pressure (Pa)
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10
Pa
