Bacharach HGM-SZ Installation & Operation Manual

Also see for AGM-SZ: Product catalog Installation & operating instructions

Bacharach HGM-SZ Installation & Operation Manual Manual pdf 30 page image

Single Zone Gas Monitor26 P/N: 3015-4256 Rev 133.9. The DIAGNOS Function3.9.1. OverviewThe DIAGNOS function displays sensor data and status information useful to a service technician fortroubleshooting various fault conditions. Explanations of the data shown in these screens are givenbelow.3.9.2. Keypad FunctionsFrom the Data Display screen, use the Keypad buttons to place the arrow (>) on the display next to theDIAGNOS function. Then press ENTER to display the first of two Diagnostic screens.Press the Up Arrow Keypad button to toggle between the First and Second Diagnostic screen.3.9.3. First Diagnostic ScreenIn the first diagnostic screen, the user can toggle between displaying the Bench Voltage / Noise andDetector Temperature / Box Temperature by pressing the Right Arrow Keypad button.Bench Voltage – This is the current peak-to-peak output of the IR detector. In the absence of gas thisvalue can range from 3.90000V to 4.50000V.Noise – The Noise value is a 16 point running average of the noise portion of the IR detector’s output.This reading is valuable mainly when refrigerant is NOT present.Detector Temperature – This is the current detector temperature in °C.Box Temperature – This is the current internal enclosure temperature in °C.Fault Code – Current fault code. A value of <0000> indicates that no faults are being detected.Manifold Pressure – Current manifold pressure in psia.Purge Valve Asterisk (∗) – The purge valve can be opened and closed by pressing the Left ArrowKeypad button. An asterisk appears on the display when the purge valve is open.3.9.4. Second Diagnostic ScreenPPM Level – Parts Per Million Level is the current detected gas level, and is the volume concentrationreferenced to standard temperature and pressure.Average Absorption Unit – This is the optical absorbency. In the absence of gas the absorbency is0.00000 au. When sampling selected gas, its value varies proportionally with the concentration.μMoles/Liter – This is the absolute concentration in micro-moles per liter of gas.Detector Voltage – This is a running average of the IR detector’s bench voltage as displayed in the FirstDiagnostic screen.Purge Valve Asterisk (∗) – When viewing the diagnostic screen, the purge valve can be opened andclosed by pressing the Left Arrow Keypad button. An asterisk appears on the display when the purgevalve is open.4.26500v <0000>24.5cD* 14.72psiBench Voltage Fault CodeDetector Temperature °C ∗ Manifold Pressure0.00250n <0000>29.5cB* 14.72psiNoise Fault CodeBox Temperature °C ∗ Manifold Pressure0.4ppm 0.000.00002au*4.260vPPM Level μMole/LiterAvg. Absorption Unit ∗ Detector Voltage