937B Controller Instruction Manual
pg. 22
1
Type of sensor detected (CC = Cold Cathode, HC = Hot Cathode, PR = Pirani,
CP = Convection Pirani or Convectron, CM = Capacitance Manometer or 902B Piezo,);
N
2
, AR, He = Gas type; U = User Calibrated or Zeroed
2
Pressure readings for all of the detected sensors.
3
Control information which includes:
•
For a Cold or Hot Cathode sensor, Cx Ctrl means the sensor is controlled by
channel Cx.
•
For a Hot Cathode sensor, F2 means filament 2 is the active filament, DG means
the HC is degassing.
•
For PR/CP/CM, Ax AZ means the PR/CP/CM will be auto-zeroed by the gauge on
Channel Ax (typically, a CC or HC).
4
Relay status: displayed channel = activated relay;
---- = enabled, but not activated relay;
blank = relay is not yet set.
5
Pressure units (Torr, Pascal, mBar, Microns)
6
Bar graph for leak detection.
7
Front screen is locked when REMOTE is displayed.
6.3.2
Large Font Display
A special large font pressure display of a single channel is also available to ensure the pressure readings
can be seen at a distance. To enter this mode:
1. While in the standard display mode, press the UP or DOWN arrow key to select the desired
channel, as indicated by the green LED.
2. Enter the large font display mode by pressing the ENTER key.
3. To exit the large font display mode, press the ENTER key.
Figure 6-2 shows a comparison between pressure measurement display in the standard mode and in the
large font mode. When the large font display is selected, one channel is displayed as large font (B1 as
shown in the figure) and the pressure readings for all the detected sensors are displayed in smaller font of
the left side of the LCD.
CP
Ar
1.00E-08
2.10E-06
<1.0E-04
<1.0E-03
C2
Ctrl
C1
Ctrl
Torr
SP11
SP12
SP9
SP10
SP5
SP6
SP7
SP8
SP1
SP2
SP3
SP4
PR
N2
CC
N2
CC
N2
A1
AZ
B1
AZ
A1
A2
B1
B2
C1
C2
2.10E-06
<1.0E-04
B1
A1
A2
B1
B2
C1
C2
<1.0E-03
1.00E-08
2.10E-06
Standard Display
Large Font Display
Figure 6-2 A Comparison between Standard Display Mode and Large Font Display Mode for the
937B LCD Display During Pressure Measurement.