Lakeshore 336, User Manual

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78 c
HAPTER
5: Advanced Operation
Model 336 Temperature Controller
5.5.2 Warm Up Control The Warm Up Control parameter determines what happens when the control set-
point is reached. The options are:
D
Auto-Off : once the Heater Range is set to on, the Warm Up Percentage voltage is
applied to the output (section 5.5.1) and the output stays on until the control
input temperature reaches the control setpoint. The output will then be turned
off (0 V), and the Heater Range setting will automatically be set to Off, effectively
turning off all temperature control for the control loop. If the Heater Range is
again manually set to On, the cycle will begin again, and the output will turn on
and stay on until the control input temperature reaches the setpoint again.
Menu Navigation:
Output Setup
Q
Output ( 3 or 4 )
Q
Warmup Mode
Q
Auto-Off
D
Continuous : this mode implements what is often referred to as On/Off control.
Once the Heater Range is set to on, the Warm Up Percentage voltage is applied to
the output until the control input temperature reaches the setpoint. Then the
output will turn off (0 V) until the temperature falls 1 K below the setpoint, at
which point the the Warm Up Percentage voltage is again applied to the output.
The Heater Range will never be automatically set to Off in this mode.
Menu Navigation:
Output Setup
Q
Output ( 3 or 4 )
Q
Warm Up Control
Q
(Auto-Off, Continuous)
Default: Continuous
Interface Command:
WARMUP
5.6 Monitor Out In Monitor Out mode, the unpowered analog output (3 or 4) will track the assigned
control input according to the scaling parameters you enter. A common use for this
function would be to send a voltage proportional to temperature to a data acquisition
system.
The Control Input parameter setting determines which sensor input is tracked by the
output. The remaining parameters detailed in this section dictate how the output
value is determined.
An output configured to Monitor Out mode is not affected by the ALL OFF key, as it does
not have a Heater Range setting, and by design is always enabled.
Menu Navigation:
Output Setup
Q
Output ( 3 or 4 )
Q
Output Mode
Q
Monitor Out
Output Setup
Q
Output ( 3 or 4 )
Q
Control Input
Q
(None, Input A, Input B,
Input C, Input D)
Default: Control Input
Q
None
Interface Command:
OUTMODE
5.6.1 Monitor Units The Monitor Units parameter determines the units of the Control Input sensor to use
for creating the proportional voltage output. The Monitor Out scaling parameter set-
tings are entered using the units chosen for this parameter.
Menu Navigation:
Output Setup
Q
Output ( 3 or 4 )
Q
Monitor Units
Q
(K, C, or Sensor)
Default: K
Interface Command:
ANALOG