Specifications

20 Instruction 3015-4256
Clearing the Stored PPM Log, Alarms & Faults Data
Up to 200 gas measurements, and 30 alarm and fault events are stored by the monitor.
To clear stored data, first display the data to be cleared by using the PPM Log, Alarms or Faults
function (Pages 15). Next, press the Right Arrow Keypad and ENTER buttons at the same time. A
single, long tone should be heard when the data has been successfully cleared.
Entering Custom Refrigerant Calibration Values
In addition to the 30 refrigerant gases available for selection, a custom gas can be added by using the
CUST K1, K2 & K3 functions (Page
17). Before using these functions, the user must contact the factory
and provide information about the gas to be monitored. The factory will then supply values for K1, K2,
and K3, which are the coefficients of a polynomial equation that represent the calibration curve of the
custom gas.
From the Data Display screen, use the Keypad buttons to place the arrow (>) on the display next to the
CUST K1 function, and then press ENTER to display the CUSTOM CAL K^1 screen. Use the Keypad
buttons to enter the 1
st
coefficient value (K1) as received from the factory. Press ENTER to save this value
in memory.
Repeat the above procedure to enter the values for K2 and K3.
Select the CUSTOM gas for monitoring by using the GASTYPE function (Page
16).
Reset to Factory Default Settings
IMPORTANT! Performing this function will delete all program parameters, alarms, faults, and ppm
log files.
With AC power removed from the monitor, press and hold down the Factory Default Switch (Page
8).
Apply AC power and listen for a beep and then a long tone. Release switch. At this time the monitor will
purge the IR bench and auto set the IR detector voltage to its baseline 0 ppm value.
After warming up, reprogram the HGMSZ to the desired settings as needed.
Factory Default Settings
Parameter Factory Default
Gas Type ................................... R-134a
Leak Alarm............................... 100 ppm
Spill Alarm................................ 300 ppm
Evacuate Alarm........................ 500 ppm
Log Interval .............................. 10 minutes
4–20 mA Factor ........................ 0.016 mA/ppm
Silence Timeout........................ 300 seconds (5 minutes)
Squelch...................................... 00.0 ppm
Zone Temperature.................... 25°C
Calibration Factor.................... 1.000