MSA PrimaX - Optional HART Module and Relay

4.5 Password
Menus which should only be changed by qualified and authorized persons are locked by a four digit
password.
The default password is 0000.
After entering the password menu, the values of the digits will be set from left to right:
1. Press UP or DOWN to change the value.
The value will be increased or decreased.
2. Press ENTER to get to the next digit.
With ESC, one digit can be backspaced.
If all four digits are entered, the password will be validated.
4.6 Changeable Parameters
Values default minimum maximum
Span/Test Gas
Value
regarding sensor [e.g.:
CO = 60ppm, H
2
S 10ppm,
O
2
= 20.8vol%,
combustible = 50% LEL]
10% of Range 100% of Range
Zero Calibration
Time
30s MAN 2000s
Span Calibration
Time
30s MAN 2000s
Idle Time after
calibration
30s 10s 2000s
Range See 6.4 List of Detectable Gases List of detectable gases
Loop Test 12mA
2mA with
2-wire version
0mA with
3/4-wire version
22mA
4.7 Optional HART Module and Relay
4.7.1 HART
Introduction
"HART" is an acronym for Highway Addressable Remote Transducer. The HARTProtocol makes use of the
Bell 202 Frequency Shift Keying [FSK] standard to superimpose digital communication signals at a low level
on top of the 4 - 20mA.
The HART Protocol provides two simultaneous communication channels:
the 4 - 20mA analog signal and a digital signal. The 4 - 20mA signal communicates the primary measured
GB PrimaX 26
4 Operation