5
No. Name Function
1Gas concentration
indicator
This LCD bar graph meter with backlight indicates gas concentration and the
preset alarm value. The peak value continues to blink even after the reading
value goes down after an alarm.
2 Power lamp (POWER) It is green during normal operation and orange when the sensor failure. It
blinks green when the equipment is turned on and also after a failure has been
taken care of to show that the equipment is warming up.
3 Alarm lamp (ALARM) A red lamp blinks to indicate a gas leakage and lights up when the buzzer stops.
4Buzzer stop key
(BZ STOP) When this key is pressed, the alarm sound stops and the blinking Alarm lamp
lights up.
5 Reset key (RESET) When this key is pressed after the buzzer stops and reading lowers, the Alarm
lamp and peak hold go off. They do not go off when the key is pressed before
the buzzer stops.
6Alarm setting key (
△▽
)Use these keys to change the preset alarm value. Press
△
to increase the
set value and press
▽
to decrease it.
7 Backup lamp (BACKUP) It is off in normal state and it blinks red during a power failure. (Equipment with
an optional backup power source only.)
8 Message window Displays messages during operation of functions.
9 Mode switch Use to set mode such as maintenance mode 1, 2, etc.
10 Function switch Use to set functions.
11 Enter key Use to set functions.
12 SOUND volume control To control alarm buzzer volume. Adjust it when you want to lower the sound.
13 Program connector Use to write in the program. Usually, it is not used.
14 Program switch Use to write in the program. Usually, select the left side.
15 Power switch A switch to open/close the equipment’s power source.
16 AC power source fuse 5.2 I 20L 1Aglass fuse.
17 Jumper pin It is used for various settings. No setting by customer is necessary.
18 Sensor signal check
terminal (SIGNAL) A terminal to check gas sensor signals
19 Sensor current check
terminal (CURR CHECK) Not used.
20 Battery test key
(B. TEST) To test the battery’s life. This key cannot be used if the equipment does not
have a backup power source.
21 Sensor current
adjustment control
(CURR) Not used.
22 Test button (TEST) Use this button for performance tests.
23 Test control (TEST) A control to adjust what the indicator indicates when the Test button is pressed.
It is adjusted so the full scale is indicated.
24 Zero adjustment volume
(ZERO) A control to adjust the gas sensor’s zero point. Adjust this in maintenance
mode 2.
25 Span adjustment volume
(SPAN) A control to calibrate the indicated value of gas concentration. Adjust this in
maintenance mode 2.
26 Analog output adjustment
volume (L) A control to adjust analog output 4 mA (1V)
27 Analog output adjustment
volume (H) A control to adjust analog output 20 mA (5V)
28 Terminal block A terminal block to connect external wirings
29 Speaker To sound an alarm
30 Backup power source
unit Supplies power from built-in battery in the event of a power failure.
31 Battery switch A switch to open/close the battery of the optional backup power source.
32 Battery fuse 5.2 I 20L 1A glass fuse
5-2 Gas Detector
Concerning dimensions of the gas detector, refer to its instruction manual.
