Clearing The Ppm Log & Faults Log; Working With The Diag Function; Overview; Keypad Functions - Spectros SF-ExplorIR Operation & Maintenance Manual

Clearing the PPM Log & Faults Log
Up to 200 gas measurements and 30 fault events are stored by the monitor.
To clear stored data, first display the data to be cleared by selecting the PPM LOG or FAULTS function
Next, press both the ENTER and Keypad Right buttons at the same time. A single, long tone should be
heard when the data has been successfully cleared.

Working with the DIAG Function

Overview

The DIAG function displays sensor data and status information useful to a service technician for
troubleshooting various fault conditions. Explanations of the data shown in these screens are given below.

Keypad Functions

From the Data Display screen, press both Keypad Left and Right buttons to display the first Function
Menu screen. Next, use the Keypad buttons to move the arrow (>) until it points to the DIAG function, and
then press ENTER to display the first of two Diagnostic screens.
Press the Keypad Up button to toggle between the First and Second Diagnostic screen.

First Diagnostic Screen

4.20885v <0000>
29.05cD 14.58psi
0.00075n <0000>
35.40cB 14.59psi
In the First Diagnostic screen, the user can toggle between displaying Bench Voltage / Detector
Temperature, and Noise / Box Temperature by pressing the Keypad Right button.
Bench Voltage – This is the current peak-to-peak output of the IR detector. In the absence of gas this value
can range from 3.90000V to 4.50000V. (Optimized at approximately 4.2V).
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 gas is NOT present.
Detector Temperature – This is the current detector temperature in °C. Range is from 0 to 50 degrees
Celsius.
Box Temperature – This is the current internal enclosure temperature in °C. Range is from 0 to 50 degrees
Celsius.
Fault Code – Current fault code. A value of <0000> indicates that no faults are being detected.
Pressure Reading – This is the pressure as measured every purge cycle with the sample pump off and the
gas-sample inlet open. Its value is weather and altitude dependent and can range from 10.0 to 15.5 PSIA.
Purge Valve Asterisk (∗) – The purge valve can be opened and closed by pressing the Keypad Left button.
An asterisk appears on the display when the purge valve is open causing the monitor to draw air from the
purge-air bag.
Bench Voltage
Detector Temperature °C ∗ Pressure Reading
Noise
∗
Box Temperature °C
Fault Code
Fault Code
Pressure Reading
16