Use Instructions And Limitations; Important; Use For; Do Not Use For - 3M 740 Serie Instrucciones De Uso

USE INSTRUCTIONS AND LIMITATIONS

IMPORTANT: Before use, each person using this equipment must read and understand these User Instructions. Keep these User Instructions for reference.

Use For

Monitoring for the following gases: Oxygen (O

Do Not Use For

Monitoring for gases other than those which the instrument was designed to monitor or in atmospheres where oxygen concentrations are below 1% when using the Combustible
Gases (EX), Hydrogen Sulfide (H S), or Carbon Monoxide (CO) sensors. Prolonged exposure to high levels of target gas may prematurely degrade sensor performance.


General Description

These User Instructions apply to the M
Combustible Gases (EX), Hydrogen Sulfide (H
the accuracy of the calibration gas, how often the instrument is calibrated, environmental conditions (temperature, atmospheric pressure, humidity, air velocity), cross
interference gases, or time of exposure to the target gas (see SPECIFICATIONS section). Calibrating with the appropriate certified calibration gas prior to use, within the
same environmental conditions in which the instrument will be used, will increase the accuracy of the instrument's gas concentration reading (see Sensor Test and Full Test
section). An internal microprocessor controls the indication and alarm functions in response to the signals received from an electrochemical sensor permanently mounted
inside the unit. When turned on, it continuously monitors the ambient air that enters the sensor through the sensor inlet opening by the process of passive diffusion. If the
level of the target gas detected by the sensor reaches an alarm set point, the unit will alarm (see ALARMS AND WARNINGS section).
The 70 Series detector has been designed for simple, one-hand operation with factory installed default settings. When the gas concentrations reach or exceed gas alarm
levels, the user is alerted by a bright alarm light, 95 dBA audible buzzer, and an internal vibrating alarm. Standard features include peak readings, data logging, and the
auto self-test performance check.
The detector is a battery-powered unit utilizing a rechargeable lithium-ion battery or replaceable AAA size non-rechargeable alkaline batteries. It is designed to be
intrinsically safe. The unit is CSA 1 certified intrinsically safe for Class I, Div. I, Groups A, B, C, and D Hazardous Locations.
The components of the detector are assembled in an ABS/PC plastic housing .8 H x .7 W x 1. D in. (Fig. 1). Located on the front face of the unit are the display (LCD),
sensor inlet, audio alarm opening, and visual alarm LED. On one side of the unit are the POWER/SELECT, TEST, and PEAK/NO buttons and power jack. On the other side of the
unit is the Infrared (IR) communication window. On the back of the unit is an alligator pocket/belt clip and a label containing the intrinsic safety information and serial number.
95 dBA buzzer
IR Window
LCD
1
Only the combustible gas detection portion of this instrument has been assessed for performance by CSA.
), Combustible Gases (EX), Hydrogen Sulfide (H

™ Multi-Gas Detector 70 Series. It is designed to provide continuous monitoring of the ambient environment for Oxygen (O
S), and/or Carbon Monoxide (CO). Accuracy of the instrument's gas sensor readings can vary up to ±5% depending on

Sensor Openings
Dual red LED
Power Jack
S), or Carbon Monoxide (CO)

POWER/SELECT
button:
Used for turning
740 ON and OFF,
accessing
download menu,
silencing alarms
and warnings and
responding "YES"
OUI
POWER
YES
TEST button:
NON
Used for accessing
NO
the sensor test
menu and "up"
arrow when
changing settings
PEAKS/NO button:
Used for accessing peak menu, "down" arrow
when changing settings and responding "NO"
to questions
Fig. 1 – 70 Series Detector Features
5
),