Instruction Manual
InstruTech CVM-211 "
Stinger
" Convection Vacuum Gauge Module
InstruTech, Inc
page 7
Setup and Operation
User Interface Basics:
The user interface is designed for easy operation and a natural
progression of setup parameters. A complete user interface map
is shown in appendix A. This section gives a brief explanation of
operation for added clarity.
The CVM-211 Stinger module has 4 settings that can be adjusted by the
user with the 3 position switch on the side of the module housing.
Pressing the switch straight in is referred to as pressing the <select> key.
Pressing the switch upward is referred to as pressing the <up> key.
Pressing the switch downward is referred to as pressing the <down> key.
During setup, and operation, be sure to consider the Torr/mTorr LEDs.
Setting up the CVM-211 Stinger Module
1. With the CVM-211 in the normal pressure display mode, press and hold <select> for 3 seconds.
2. The readout displays the value of the '
setpoint turn-on’
pressure. The relay energizes when pressure drops
below
this value. [Factory default = 100 mTorr.]
3a. To keep this value and proceed to the next step, press <select>.
3b. To change the value, use the <up> <down> keys. Then press <select> to save and go to the next step.
4. The readout displays the value of the
'setpoint turn-off’
pressure. The relay de-energizes when the pressure
is
above
this value. [Factory default = 200 mTorr.]
5a. To keep this value and proceed to the next step, press <select>.
5b. To change the value, use the <up> <down> keys. Then press <select> to save and go to the next step.
6. The readout will display ‘000’ to indicate the unit is in the
"zero adjust"
mode. To properly set "
zero
", the
gauge must be evacuated to a pressure below 10
-4
Torr. [Factory default = 000 mTorr.]
7a. If the gauge is
not
evacuated to a pressure below 10
-4
Torr, press <select> to proceed to the next step,
without
saving a new "
zero
" value.
7b. If the gauge
is
evacuated to a pressure below 10
-4
Torr, press <down> to save the new user "
zero
"
and proceed to the next step.
8. The readout will display the current "
span
" value. To set "
span
", the gauge must be backfilled with air or
N
2
to some known pressure above 400 Torr. (If barometric pressure is known, the gauge may be opened
to atmosphere.) [Factory default = 760 Torr.]
9a. If you do
not
have a known pressure in the gauge, press <select> briefly (less than 3 seconds) to exit the
setup menu and return to the normal pressure display
without
saving a new "
span
" value.
9b. If you
do
have a known pressure in the gauge, use the <up> <down> keys to change the displayed value to
agree with the known pressure. Press and hold <select> for 3 seconds until the displayed pressure switches
to the new value. This will save the new "span" setting, and return to the normal pressure display.
Return to Factory Default Settings
You can reset all values to the original factory default settings by holding the <up> key for 5 seconds. The display
will read "dEF" until 5 seconds has passed, at which point
all user settings will be replaced by the original factory
default values
, and the display will return to the normal pressure display. If you release the <up> key before 5
seconds has passed, the display will return to normal pressure display without resetting to factory defaults.
