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Instruction Manual
4 Setup and Operation
4.1 Gauge start up and operation
Read this user manual in its entirety before operating the instrument.
The signal output is available when power is applied to the gauge. Allow for a Warm-up time of approx.
1 minute.
4.2 Zeroing the Gauge
• The gauge is factory calibrated while "standing upright". It requires no maintenance.
• Due to mounting orientation, operation over long period of time or contamination, a zero drift could occur
and zero adjustment may become necessary.
• For adjusting the zero, operate the gauge under the same constant ambient conditions and in the same
normal mounting orientation.
The zero can be adjusted via one of the following methods:
• the button on the gauge
• the digital input "Remote zero adjust " (briefly apply the supply voltage to pin 7 of the D-Sub connector)
Evacuate the vacuum system to a pressure according to the table below:
F.S.
1000 Torr
500
200
100
50
20
10
InstruTech
Recommended final pressure for zero adjustment
-2
<5×10
Torr
-2
<2.5×10
Torr
-2
<10
Torr
-3
<5×10
Torr
-3
<2.5×10
Torr
-3
<10
Torr
-4
<5×10
Torr
-2
<5×10
mbar
-2
<3.33×10
mbar
-2
<10
mbar
-3
<5×10
mbar
-3
<2.5×10
mbar
-3
<10
mbar
-4
<5×10
mbar
CDM900 Micro Bee
0
<6.65×10
Pa
0
<3.33×10
Pa
-0
<1.33×10
Pa
-1
<6.65×10
Pa
-1
<3.33×10
Pa
-1
<1.33×10
Pa
-2
<6.65×10
Pa
Page 11
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