Page 80 - Gas Detection Systems Training Manual

SEC DIAGNOSTICS
RESET RELAYS FORMAT FLASH CARD
* EXIT
Scroll down to and select ENTER on EXIT to return the screen to the Normal Operating Display.
8.5. Alarm Settings – Threshold Values and Active Mode
In the ‘ALARM’ menu the user can set the thresholds for the Low, Mid and High alarms for both sensors. The default values for these settings are Low = 20% full scale, Mid = 40% of full scale and High = 60% of full scale. The ‘Active Mode’ of each alarm set point can also be changed in this menu. An Active High setting will trigger the alarm when the gas concentration is rising and crosses the threshold set point. An Active Low setting will trigger the alarm when the gas concentration is falling and crosses the threshold set point. The user can also change the “MUTE ON WARN” setting. This setting determines how the transmitter acts when the attached sensor goes into a warning (only applies to SEC5000 Evolution and SEC3300). The default for this setting is “NO” meaning that if the unit goes into a warning but still senses gas, the transmitter relays will activate (LEDs will also change) and communicate to the SEC3500 when an alarm threshold has been met. Turning the setting “YES” will keep the transmitter relays from activating and the LEDs from changing color when the unit is in a warning.
Alarm Menu (Selected from the Main Menu)
CALIBRATION * ALARM
RELAY NETWORK
* FOR SENSOR: ONE / TWO LOW
MID HIGH
FOR SENSOR: ONE / TWO * LOW
MID HIGH
* THRESHOLD ‘value’ ACTIVE MODE HIGH/LOW PREVIOUS MENU
* THRESHOLD ‘value’ * ACTIVE MODE HIGH/LOW PREVIOUS MENU
THRESHOLD ‘value’
* ACTIVE MODE HIGH/LOW*
PREVIOUS MENU
THRESHOLD ‘value’
ACTIVE MODE HIGH/LOW * PREVIOUS MENU
Operator Manual
SEC3120 Digital Transmitter
Move the cursor to ALARM and select ENTER to open the alarm menu.
ENTER on ‘FOR SENSOR’ ‘ONE/TWO’ to choose which sensor to perform alarm configuration operations.
DOWN switch to select sensor one Up switch to select sensor two
Move the cursor to the alarm to set (LOW, MID or HIGH) and select ENTER.
To set the alarm set-point move the cursor to THRESHOLD and select ENTER.
Using the UP and DOWN switches set the desired value then select ENTER.
Selecting ACTIVE MODE will allow the operator to change the operation of the alarm activation operation from Active HIGH to Active LOW. Once the correct operation is selected select ENTER.
- HIGH activates the alarm on a rising gas level.
- LOW actives the alarm when the gas level falls below the
alarm set point.
ENTER on ‘PREVIOUS MENU’ to return to the Alarm Menu and choose to save or abort the changes.
Page 19 of 40 P/N 1580281 Sensor Electronics Corporation Rev 10, 20150707