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Instruction manual
SK-L750 Series Dataloggers
No. 8800-00 Model SK-L751
(Temperature Measurement)
No. 8850-00 Model SK-L753
(Pt Sensor Temperature Measurement)
No. 8870-00 Model SK-L754
(Temperature/Humidity Measurement)
SATO KEIRYOKI MFG. CO., LTD.

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Summarization of Contents

Introduction
WARNING
SK-L750 Series Dataloggers are not explosion-proof. Never use in atmosphere containing flammable gases.
SAFETY PRECAUTIONS
Precautions for safe use of the datalogger, including handling, environment, and specific model considerations.
Overview
Features
Highlights key features: storage capacity, data retention, waterproof structure, logging options, and probe interchangeability.
What's in the Package?
Lists the items included in the datalogger package, noting that microSD card and probes are sold separately.
1. Names of Section
Front view
Illustrates and labels the front view components of the SK-L751, SK-L754, and SK-L753 datalogger models.
Rear view
Illustrates and labels the rear view components of the SK-L751, SK-L754, and SK-L753 datalogger models.
Component Descriptions
Provides definitions for numbered components: Probe connector, Operation keys, Port for AC adapter/USB cable, Battery cover, MicroSD card slot.
Switch Descriptions
Explains the functions of the Reset switch and the °C/°F switch for specific models.
LCD Display
Measurement Display Icons
Details the meaning of icons and indicators on the LCD: Measurement display, Channels, ALM, SD, REC, RES, TIME, and Full.
Data Memory Bar Graph
Explains the data memory bar graph and the 'Full' indicator, relating lit segments to logged data items.
Operation Keys
Describes the functions of the Power key, MODE key, SET key, REC key, OUT key, and ALARM light.
Standard probes
SK-L751/SK-L754 Probes
Illustrates and labels plug-in type and with-sensor-cord type probes for SK-L751 and SK-L754 models.
Pt sensor connector box for SK-L753
Details the Pt sensor connector box for SK-L753, showing terminal block and sensor insertion point.
2. Preparation
2.1 Installing batteries
Instructions for installing batteries, including polarity and battery lid replacement.
Using AC Adapter
Instructions for connecting the AC adapter via the USB port for power.
Cautions
Important cautions regarding battery replacement, waterproofness, and AC adapter usage.
2.2 Connecting the probe
Connecting Standard Probes
Guidance on connecting probes to the unit, ensuring proper orientation and tightening for waterproofness.
2.3 Connecting to the PC
PC Connection
How to connect the unit to a PC using a USB cable for settings via dedicated software.
2.4 Installation
Wall Mounting
Instructions for hanging the unit on a wall using wall-mount hooks and screws, with dimensional guidance.
Mounting Pt sensor connector box
Guidance on mounting the Pt sensor connector box for SK-L753, including screw hole diameter and spacers.
3. Functions
Performance Overview
Overview of operations performed with keys and settings done via dedicated software.
Setting Mode Flowchart
Visual representation of the workflow and options within the Setting Mode for datalogger configuration.
3.1 Measurement mode
Measurement Mode Operation
Describes how the unit measures ambient air and displays results on the LCD after powering on.
3.2 Setting mode
Setting Mode Functions
Explains how to enter setting mode and set functions like alarm, logging interval, and preset start.
Default Settings
Lists the default settings for ID, Date/Time, Logging interval, Logging option, alarms, preset start, and key lock.
Display of ID
How to display and set the ID number on the unit, with factory default and software options.
Display of time
How to display and set the year, month, date, hour, and minute using the software.
Display of logging interval
How to display and set the logging interval, including available options and key operation.
Display of logging option
How to display and set the logging option, showing available modes like 'Once', 'Repeatedly', 'End at...', 'By Page'.
Display of 'End at ...' setting
Specifying the number of data items to log when 'End at ...' option is selected.
Display of alarm setting
Indicates whether alarms are set (ON/OFF) and how to toggle them using keys.
Display of preset start setting
Indicates whether preset start is activated (ON/OFF) and how to toggle it.
3.3 Logging mode
Logging Mode Operation
Logs measured values according to the specified logging option; a current value can be displayed.
3.4 Copying-to-SD mode
Copying Data to MicroSD
Copies logged data to a microSD card by pressing the OUT key for two seconds.
3.5 Standby-for-preset-start mode
Standby for Preset Start
Unit enters this mode after preset start setting is complete and before logging begins.
3.6 Deleting-logged-data mode
Deleting Logged Data
Press REC key for two seconds while holding SET key to remove logged data.
3.7 Real-time mode
Real-time Data Transmission
Measured values are transmitted to a connected PC in real time, controllable only from the software.
4. Operation procedure
Datalogger Operation Steps
Outlines the sequence of operations: Power on, Set ID, Date/Time, Logging interval, Logging option, Alarm, and Start logging.
5. Logging option
Logging Option: Once
The unit logs until memory is full (16000 data items) and then stops.
Logging Option: Repeatedly
The unit overwrites existing data from the beginning once the memory becomes full.
Logging Option: End at ...
Logs a specified number of data items in advance, between 1 and 16000.
Logging Option: By Page
Memory is partitioned into four pages (4000 items each) for logging data from multiple sites.
Memory Bar and Data Count
Explains the relationship between lit segments on the memory bar and the number of logged data items.
6. Alarm operation
Alarm Indicators and Actions
Describes how ALM, Hi/Lo indicators and alarm light work when values exceed/fall below set points.
Turning Off Alarm Actions
How to turn off alarm actions by pressing MODE key while holding SET key.
7. Key lock function
Key Lock Functionality
Explains how to enable and disable the key lock feature to prevent misoperation.
8. AC Adapter
Dedicated AC Adapter
Information on the dedicated AC adapter and specifications for compatible third-party adapters.
9. Error Codes
Error Code Definitions
Lists error codes (H, Lo, Er, Er1-Er6) with their definitions and recommended solutions.
10. Specifications
SK-L751 Specifications
Detailed specifications for the SK-L751 model, including measuring range, resolution, accuracy, and power.
SK-L754 Specifications
Detailed specifications for the SK-L754 model, including measuring range, resolution, accuracy, and power.
SK-L753 Specifications
SK-L753 Specifications
Detailed specifications for the SK-L753 model, including measuring range, resolution, accuracy, and power.
Specification Notes
Notes on attached batteries, specification changes, and probe manual references.
WARRANTY POLICY
Product Warranty
Details warranty coverage for defects in materials and workmanship for one year from delivery.
Warranty During Transportation
Specifies warranty coverage during transportation, excluding items purchased domestically and sent overseas.
Return of Items
Procedure for returning items, requiring prior authorization and reason data.

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