Automatic Pressure Input Calibration; Using A Fixed Pressure Input In Single Channel Mode - Michell Instruments Pura User Manual

OPERATION
3.3.2

Automatic Pressure Input Calibration

Alternatively, the pressure input can be calibrated using a 4...20 mA source.
1. Connect the current source between pin 2 (-ve) and pin 5 (+ve).
2. Set CAL
ZEro and flash
3. Set the mA source to 4.0 mA and press
4. Press SETUP
scale pressure value.
5. Set the mA source to 20.0 mA and use the  or  buttons to set
the required pressure range.
SETUP
6. Press
CAL
7. Set
3.4

Using a Fixed Pressure Input in Single Channel Mode

In order to display pressure compensated values of ppm
a pressure transducer, enter the pressure value manually.
1. Ensure security lockout switches are in the OFF position (Section
4.1).
2. Press SETUP
CODE 7.
select
3. Select the required pressure compensated value, i.e.
10X for ppm
4. Exit the menus (see Section 3.1) and exit the
mode.
SETUP
5. Press
pressure. To change the pressure, use the  or  buttons and
then press
22
Pura Advanced Online Hygrometer User Manual
to 022 and press SETUP
0 .
and the monitor will display
to set the required pressure for 20.0 mA.
to 000 and press the  button to leave the menu.
and the  button to scroll through the menus and
CAL
/ ppb and
V V
for two seconds. The display will show the set
SETUP
to confirm.
. The monitor will then display
SETUP
to set 0 at 4 mA.
SPAn and flash the full
V
= 052 (see Table 3).
PROGRAM UNLOCK
97074 Issue 10, December 2021
and ppb without the use of
V
CODE 7 =