Metek 920, Operator'S Manual With Essential Health And Safety Requirements

Page: 135 / 278

Controller / User Interface | 4-27
F6 8
z
Show MAI
z
The Show Microcontroller Board’s Analog Inputs (MAI) function allows you to view the
analog input values, where ‘
z
’ (
z
= 1..8) is defined by MAI below. The signal level (volts or
scaled parameter units) are also displayed.
To view the operating temperature for each temperature zone or for the Heater Plate, press
the key for that parameter.
To view the Measuring Cell pressure (mmHg or
"
Hg), press ‘ 6 ’ from this screen.
To view the status of the Over-Temperature relay ( normal or tripped ), press ‘ 5 ’ from this
screen.
MAI (z) Message Zone
1 s/lT °C Sample Line
2 scuT °C Vent Line (or SCU)
3 Tmp3 °C Spare
4 CellT °C Measuring Cell
5 Oven Heater Hot Oven
6 CellP mmHg Measuring Cell
7 HtrT °C Reserved
8 MIA8 °C Reserved for:
(optional) External Probe Temperature
(Voltage Input)
or
External Probe Temperature
(Voltage Input)
For MAI 6, the pressure signal is displayed in mm Hg (or inches Hg) when active pressure compensation is
enabled; when active pressure compensation is not enabled, the signal is displayed in volts.
F6 9
z
Show HAI
z
The Show Host Controller Board’s Analog Inputs (HAI) function allows you to view the ana-
log input voltages or scaled parameters for each Host Controller board analog input. The
value for each input is displayed by pressing F6 9z , where ‘
z
’ (
z
= 1..8) is defined by HAI
below.
HAI (z) Message Zone
1 SVel External Stream Velocity
2 VFlow External Stream Temperature
or
External Flow Rate
3 HAI3 Reserved
4 O2 Internal O
2
Concentration
or
External O
2
Concentration
5..8 HAI5..8 Reserved