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20
of
30
Error Code Description
ER01
Operation not allowed
ER02
Parameter at limit
ER03
Timeout during Setup Mode
ER11
275 / CEP zero adjustment not allowed
ER12
275 / CEP ATM adjustment not allowed
ER21
CDG zero adjustment not allowed
ER22
CDG ATM adjustment not allowed
Pressure Gauge
The Granville-Phillips 275 Convectron® gauge and MKS / HPS Series 317 gauge have internal
resistance values indicative of an operational pressure gauge. User should first reset the
Terranova® 907 to correct any controller problems. If resetting does not resolve the problem,
user may clean the inside of the pressure gauge. A cleaning agent such as acetone or toluene
may be used to carefully clear away any contaminants. The pressure gauge should be replaced
if resistances greatly deviate or if cleaning does not provide reasonable pressure readings.
Chemicals
Many organic cleaning solvents, such as acetone, produce fumes
that are toxic and/or flammable. Such solvents should only be
used in well-ventilated areas and away from electronic
equipment, open flames, or other potential ignition sources.
Granville-Phillips 275 Convectron® Gauge
Figure 5
. Granville-Phillips 275 Convectron® gauge pin configuration
PIN
Resistance [Ω]
1 & 2
18 to 23
2 & 3
50 to 60
1 & 5
180 to 185
Table 4
. Granville-Phillips 275 Convectron® gauge resistance values
