Mini-Convectron Module with RS-485
39
Instruction Manual - 275545
Saf
e
ty Ins
tructions
Introduction
Installatio
n
O
p
e
ra
tion
M
a
inten
ance
Calibration
Chapter 4
Calibration
4.1
Calibration
Each Mini-Convectron gauge tube is individually calibrated for N
2
and
temperature compensated prior to leaving the factory. Each controller is
individually calibrated to provide accurate readout of N
2
or air pressure;
therefore, initial calibration should not be necessary. See page 40 for use
with gases other than N
2
and air. If the tube becomes contaminated or does
not read correctly, the Mini-Convectron can be calibrated by performing
the following steps. Always perform vacuum adjust before atmosphere
adjust. Atmosphere adjust will not effect vacuum setting but vacuum adjust
will effect atmosphere setting.
Vacuum Adjust
1.
Evacuate the system.
2.
If you know the pressure is less than 1 x 10
–4
Torr, send TZ0 or
TZ0.00E-00 and the Mini-Convectron will be zeroed. If the base
pressure is between 1 x 10
–4
Torr and 1 x 10-1 Torr, use another gauge
or pump specs to set TZ. Example: You know that your pump will go
down to 1 x 10
–2
Torr, so send TZ1.00E-02.
