MZ-RD – Multi-Zone Remote Display
34 Instruction 3015-5157
Diagnostic Screen
4.10.3. Diagnostic Screen Overview
The Diagnostic Screen contains sensor data and status information useful for trouble shooting
various fault conditions. An explanation of each line of this screen is given below along with normal
operating ranges.
Field Name Description
xxxx FEET Programmed length of tubing for an active zone.
xx ZONE name
Current active zone and user-programmed name. This field may also show “WARM UP” during warm
up mode.
DET
Detector Voltage – Peak-to-peak output of the IR sensor. In the absence of gas, this value range is
4.100V to 4.300V.
AVE Average Detector Voltage – Running average of the values displayed in line 1.
ZERO
Zero Voltage – IR sensor output that was stored during the last purge cycle and has the same range as
line 1.
NOISE
A 16 point running average of the noise portion of IR bench output. This reading is valuable mostly
when gas is not present.
AVEAU
Average Absorbency – Optical absorbency computed from the Average Detector Voltage and Zero
Voltage. In the absence of selected gas, the absorbency is 0.000AU. When sampling desired gas, its
value varies proportionally with the gas concentration.
UM/L
uMoles/L – Absolute concentration in micro-moles per liter of gas based on Noise and the internal
calibration. There are two figures displayed. The first (annotated by a B) is the actual measurement at
the IR bench. The second is the calculated value corrected to ambient conditions (temperature +
pressure).
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