Bacharach HGM-SZ Supplementary Manual - page 3
RESET TO DEFAULT SETTINGS
Press and hold the DEFAULT button (located about one inch above the 4-20mA dc output
connector), cycle power holding the DEFAULT button in. A single long “beep” will be heard. –
release the button after the “beep” stops. The screen will display PURGE. The next screen will
show the DIGIPOT adjusting the IR VOLTAGE to default settings. The monitor will then go
into normal warm-up.
TO CLEAR ALL FAULT CODES
From the measure screen – press the right arrow key and enter key at the same time. A single
long “beep” will be heard and all previous fault codes will clear.
TO CONVERT FAULT CODES FROM NUMERIC TO ENGLISH
From the fault screen press enter. Use the up and down arrow keys to scroll through the fault list.
Those items in fault will have the English translation on the bottom right side of the screen.
IR BENCH RESISTANCE READING
To verify the IR bench resistance place the curser on IR in the DIGIPOT screen and press the
ENTER key. R is the IR bench resistance reading. The reading should be about 50 ohms.
V-X.XXX mA-XXX.X
R-XX.X mW-XXX.X
4 TO 20 Ma dc OUTPUT TEST
Remove the jumper from the 4-20 output connector. Connect a multi-meter set for mA to the
contacts. The output should be a nominal 4 mA except for reading an actual gas concentration.
Scroll through the screens until the screen displaying LOOP is located: enter the LOOP function
by placing the curser on LOOP and pressing ENTER. The setting should be 0.016mA.
HGMSZ NOTES
To clear faults – From measure screen press right arrow and enter key at same time.
To read fault codes – From fault screen press enter. Use down arrow key to run through fault list.
Those items in fault will have the English translation on the bottom right of screen.
If the monitor will not retain its settings through a power cycle, verify that the battery is properly
installed.
Revised 6/5/08
P. M. Pape