Sensor Test Interval Setting; Backlight Duration Setting; Confidence Beep Option; Data Logging Option - 3M 740 Serie Instrucciones De Uso

Sensor Test Interval Setting

The Sensor Test Interval Setting can be set by pressing the PEAKS/NO button while the Sensor Test Interval Setting is being displayed during warm-up (Fig. 1). To skip this step,
either press the POWER/SELECT button or wait 5 seconds. If the number of days since the last sensor test exceeds the Sensor Test Interval Setting then the Message "SENSOR
TEST DUE" will be displayed at start up. If the password protection has been set, you will be required to enter the password in order to change the Sensor Test Interval Setting.

Backlight Duration Setting

The LCD screen is automatically backlit for 5 seconds whenever any of the buttons of the detector are pushed or when the detector goes into alarm. The Backlight Duration
Setting can be set by pressing the PEAKS/NO button while the Backlight Duration Setting is being displayed during warm-up (Fig. 15). To skip this step, either press the
POWER/SELECT button or wait 5 seconds. This will change the time that the backlight will turn on each time a button is pressed or an alarm is enabled. The range is from
1 to 0 seconds. Use the arrow buttons to change to the desired selection and press the POWER/SELECT button to confirm your choice. If the password protection has
been set, you will be required to enter the password in order to change the Backlight Duration Setting.

Confidence Beep Option

The Confidence Beep Option can be set by pressing the PEAKS/NO button while the Confidence Beep Option is being displayed during warm-up (Fig. 16). To skip this step,
either press the POWER/SELECT button or wait 5 seconds. If the confidence beep is set ON, it provides an audible indicator every 0 seconds to indicate to the user that
the instrument is operational and that none of the alarms are activated. Change the Confidence Beep Option to the desired selection and confirm selection by pressing the
POWER/SELECT button. If the password protection has been set, you will be required to enter the password in order to change the Confidence Beep Option.
Fig. 1

Sensor Test Interval Setting

Data Logging Option

The Data Logging Option can be set by pressing the PEAKS/NO button while the Data Logging Option is being displayed during warm-up (Fig. 17). To skip this step, either
press the POWER/SELECT button or wait 5 seconds. The Data Logging Option can be set ON or OFF by using the arrow buttons to change to the desired selection and
pressing the POWER/SELECT button. If the password protection has been set, you will be required to enter the password in order to change the Data Logging Option.

Password Setting

The Password Setting can be set by pressing the PEAKS/NO button while the Password Setting is being displayed during warm-up (Fig. 18). To skip this step, either press
the POWER/SELECT button or wait 5 seconds. The password is four numerical digits. If the password protection has been set, you will be required to enter the password
in order to change the Password Setting. Simply use the up and down arrow buttons to scroll to the desired digit and press the POWER/SELECT button to advance to the
next digit. The default password from the factory is "1." Changing the password to "0000" allows changes to be made without having to enter the password each time,
effectively disabling the password. If you change the password remember to record the password in a secure location. If you lose your password you can call M to obtain a
back-up password.

Peak Values

Pressing the PEAKS/NO button changes the display from current readings to one that shows the peak values recorded since the unit was last turned on, or since the last
time that the peaks were cleared (Fig. 19). From the peaks display, you can press the TEST button, or wait for 5 seconds, to see the low peak for Oxygen. You can then
press the POWER/SELECT button, or wait for 5 seconds, to return to normal display mode. The peaks will be retained in memory until the 70 series detector is turned off,
or until the peaks are cleared.
To clear peaks, press the POWER/SELECT button while the "CLEAR PEAKS?" message is active. Confirm your desire to clear the peaks by pressing POWER/SELECT button
when the "SURE ABOUT CLEARING PEAKS?" message is displayed (Fig. 0). Peaks are also cleared each time the detector is turned off. Peak values are not recorded
during a sensor test and for  minutes following completion of a sensor test.
Fig. 17
Data Logging Option
Fig. 15

Backlight Duration Setting

Fig. 18

Password Setting

Fig. 16
Confidence Beep Option
Fig 19

Peak Values

10
Fig. 0

Clearing Peaks