2
SETUP
2
Setup
2.1
Installation
Each MV2A is designed to be used in conjunction with a 2A sensor. The 2A sensor can be mounted
in any orientation. The sensor should be mounted close to the area where vacuum measurement is
desired. Each 2A sensor has a key that only allows the octal end of the MV2A cable to mate with the
sensor in the proper orientation. Rotate the octal end of the MV2A cable until the correct alignment is
obtained and the MV2A cable is able to slide onto the 2A sensor. Connect the RJ14 end of the MV2A
cable into the port on the back of the MV2A labeled "input". It is recommended that the ground con-
nector on the cable is also connected to the port on the back of the MV2A labeled with the universal
earth ground symbol.
Try to avoid connecting the 2A sensor to the vacuum chamber by long or narrow piping as this may
affect the accuracy and response time of the unit. Avoid mounting the unit near a heater within the
chamber as this may affect the measurement accuracy. Excessive vibration of the sensor may affect
accuracy and decrease the life of the sensor. Exposure to oils and other contaminants will decrease
the accuracy and decrease the life of the sensor. Do not expose the sensor to corrosive gases.
2.2
Electrical Information
The MV2A has several connectors located on the rear of the unit. A connection diagram is provided
for convenience.
Figure 2: MV2A Electrical Connection Information
Label
Description
1
AC Input
2
SP1 C
3
SP1 NC
4
SP1 NO
5
SP2 C
6
SP2 NC
7
SP2 NO
8
Analog (0 to 5 V)
9
Analog Output – (0 to 5 V)
10
Earth Ground
11
Sensor Input
2.3
Set Points
The instrument is equipped with dual set points which are adjustable from the front panel. These two
set points are control relays, which can be found on the rear of the controller. These can be wired to
be normally open or normally closed.
To adjust the set point values, hold either
SP1
or
SP2
while toggling the
UP
or
DOWN
buttons
to the desired value on the screen.
Note: the factory settings for set points are 100 mTorr and 200 mTorr for SP1 and SP2, respectively.
To restore these default values, hold
SP1
,
SP2
,
UP
, and
DOWN
simultaneously.
email: [email protected]
tel: +1 215 947 2500
web: frederickscompany.com
mv2a_im rev B
4 of 6
