Vacuum Sensor Calibration Utility
Whenever a new vacuum sensor is used, the six-
digit calibration number printed on the side of the
vacuum sensor must be entered. At the screen
shown in Figure 3-4, press and hold the “ENTER”
key. A small pop-up window will appear where
the elapsed time usually appears. The 6 digit
number displayed is the sensor calibration num-
ber currently in memory. These digits need to be
changed to match the number on the new sensor.
The white highlighted digit indicates the digit being
edited. Use the UP/DOWN buttons to change the
highlighted value. When the highlighted value
matches the digit on the sensor label, press the
ENTER button to move to the next digit position.
Repeat until all 6 digits match the digits on the
sensor label. When the sensor number is properly
entered, press the CLEAR button. The sensor
number field will disappear and the elapsed time
field will reappear.
The instrument is
now ready for use
with the new sensor.
Figure 3-5. Sensor Calibration Number
Connect the gauge to a dry part of the system.
The sensor will not work if it becomes filled with
system oil. When the pressure falls into the read-
out range, the numeric readout will appear.
The vacuum sensor requires approximately 30
seconds of operating (warm-up) time before the
readings are accurate.
Tips for avoiding sensor contamination
Inspect fitting for signs of oil before connecting
the 69086 vacuum gauge sensor.
Keep the sensor vertical when possible.
Connect the gauge directly to the system,
away from the pump.
Isolate the pump from the system (and the
gauge) with a valve before turning the pump
off. This is very important when the gauge is
mounted near the pump.
Chapter 4
Data Logging
Introduction
Data simultaneously generated by the tempera-
ture and pressure inputs and vacuum sensor may
be stored in the instrument’s memory for viewing
later via the instrument’s PLAYBACK mode or by
downloading the data to a PC.
Calibration
Number
●
●
●
●
Before data logging, verify that the units (tem-
perature, pressure, vacuum) are set to the desired
values. They cannot be changed when data
logging is active.
Figure 4-1. Data Logging Menu
Begin Logging
To activate data logging, select the BEGIN LOG-
GING option from the main Data Logging menu.
The data logging start-up screen will appear,
allowing you to select the sampling rate. The
sampling rate defines how often readings will
be stored. This screen also shows the available
data logging memory and the calculated time limit
(based on the current sampling rate).
When data logging, the sampling rate will dictate
the chart time setting on the Digital Manifold
screen.
Figure 4-2. Data Logging
Start-Up Screen
After selecting the sampling rate and pressing
ENTER, the digital manifold screen will appear as
usual. When the instrument is logging data, the
REC
icon will flash at the top of the screen and
the red indicator light next to the keypad will flash
periodically.
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