--
5-2 Gas Detector
Refer to the gas detector’s instructionmanual for its dimensions.
No. Name Function
1 Gas concentration indicator This LCD bar graph meter with backlight indicates gas concentration and the
preset alarm value.
2Powerlamp(POWER) It is green during normal operation and orange on a 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 oxygen leakage and oxygen deficiency 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 the reading goes back to a
normal value, the Alarm lamp goes off. It does not go off when the key is
pressed before the buzzer stops.
6 Alarm 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. Oxygen concentration is
displayed according to specifications.
9 Mode switch Use to set a 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 Aswitch to open/close the equipment’s power source.
16 AC power source fuse 5.2 × 20L1Aglass fuse.
17 Jumper pin It is used for various settings. No setting bya customer is necessary.
18 Sensor signal check terminal
(SIGNAL) Aterminal to check gas sensor signals.
19 Sensor current check terminal
(CURR CHECK) Not used in this equipment.
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 in this equipment.
22 Test button (TEST) Use this button for performance tests.
23 Test control (TEST) Acontrol to adjust what the indicator indicates when the Test button is pressed.
24 Zero adjustment volume (ZERO) Acontrol to adjust the gas sensor’s zero point.
25 Span adjustment volume (SPAN) Acontrol to calibrate the indicated value of gas concentration.
26 Analog output adjustment
volume (L) Acontrol to adjust analog output 4 mA(1V)
27 Analog output adjustment
volume (H) Acontrol to adjust analog output 20 mA(5V)
28 Terminal block Aterminal block to connect external wirings.
29 Speaker To sound an alarm. Oxygen leakage and oxygen deficiency are notified with
the alarm sound.
30 Backup power source unit Supplies power from a built-in battery in the event of a power failure.
31 Battery switch Aswitch to open/close the batteryof the optional backup power source.
32 Battery fuse 5.2 × 20L1Aglass fuse
