Lake Shore 372, Руководство пользователя, Страница: 120 / 214

108 c
HAPTER
5: Advanced Operation
Model 372 AC Resistance Bridge and Temperature Controller
Output Setup
Q
Warm Up Heater
Q
Warm Up Control
Q
Continuous
Default: Continuous
Interface command:
WARMUP
5.4 Monitor Out In Monitor Out mode, the unpowered analog/still output will track the assigned con-
trol input according to the scaling parameters you enter. A common use for this func-
tion 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.
When a scanned measurement input channel is selected as the control input and that
channel is not active at a given time, the analog/still output will continue to output a volt-
age proportional to the last known valid reading.
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
Analog/Still
Q
Output Mode
Q
Monitor Out
Output Setup
Q
Analog Still
Q
Control Input
Q
(None, A, 1-16)
Default: Control Input
Q
None
Interface command:
OUTMODE
5.4.1 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
Analog/Still
Q
Monitor Out Units
Q
(Kelvin or Sensor)
Default: kelvin
Interface command:
ANALOG
5.4.1.1 Polarity and Monitor Out Scaling Parameters
In the Monitor Out and Open Loop modes, the analog/still output can be configured
as either unipolar (0 V to +10 V) or bipolar (-10 V to +10 V) outputs. In bipolar mode,
the Monitor Out -10 V setting determines the temperature or sensor value at which
the output should be -10 V. In unipolar mode, the Monitor Out 0 V setting determines
the temperature or sensor value at which the output should be 0 V. The Monitor Out
+10 V setting determines the temperature or sensor value at which the output should
be +10 V in either unipolar or bipolar modes.
FIGURE 5-2 Unipolar and bipolar mode
Bipolar
Lowest Middle Highest
–10 V 0 V +10 V
0 V +5 V +10 V
Lowest Middle Highest
Input mode
Input
Output
Input
Output
Unipolar