User`s manual

134 cHAPTER 8: Service
Model 335 Temperature Controller
8.7 Factory Reset
Menu
It is sometimes necessary to reset instrument parameter values or to clear the con-
tents of curve memory. Both are stored in nonv
olatile memory called NOVRAM, but
they can be cleared individually. Instrument calibration is not affected except for
Room Temperature Calibration, which should be recalibrated after the parameters
are set to default values or any time the thermocouple curve is changed.
8.7.1 Default Values
The factory defaults can be reset, and the user curves cleared, using the Factory Reset
menu. To access the Factory Reset menu, press and hold Escape for 5 s. Once the
menu appears, select yes or no to the prompt Factory Reset. Selecting yes restores the
defaults as listed in TABLE 8-1. Then select yes or no to the prompt Clear Curves, and
press Enter.
Default values
Input setup – general Default Interface setup Default
Sensor type Diode IEEE address 12
Filter Off Emulation mode None
Input name Input A, Input B
Alarm Default
Temperature limit 0 K (Off) Alarm Off
Input units Kelvin
Relay Default
Curve DT-670 Relay
Off
Input setup – diode Default Keypad locking Default
Range 2.5 V (Silicon) Mode Unlocked
Diode current 10 µA Lock code
123
Input setup – 
platinum/NTC RTD
Default
PID/manual heater power
(MHP) output
Default
Autorange On Proportional (P) 50.0
Current reversal On Integral (I)
20.0
Input setup – thermocouple Default Derivative (D) 0.0
Room comp On Manual Output 0.000%
Room cal Cleared
Heater Default
Output setup Default Heater range Off
Output mode Closed loop PID
Setpoint Default
Control input Input A for Output 1; Input B
for Output 2 Setpoint value 0.000 K
Heater resistance 25 )
Remote/local Default
Power up enable Off Remote/local Local
Heater out display Current
Zone settings – all zones Default
Setpoint ramping Off Upper boundary
0.000 K
Display setup Default Proportional (P) 50.0
Display mode Two Input Loop A Integral (I) 20.0
Location 1 source Input A Derivative (D) 0.00
Location 1 units Kelvin Manual output 0.000%
Location 2 source Input B Range Off
Location 2 units Kelvin Ramp rate 0.100 K/min
Location 3 source Setpoint 1 Control input Default
Location 3 units Kelvin
Location 4 source Output 1
Location 4 units Kelvin
Brightness 75%
TABLE 8-1