Table of Contents
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Microprocessor-Based
Hygro-Thermograph
ST-50A / ST-50M
Operation Manual
CE Approved
Thank you for purchasing this Microprocessor-Based Hygro-Thermograph.
The essential information for the correct oper ation of the Hygro-Thermograph is described
in this manual. Please be sure to read this manual carefully before using the Hygro-
Thermograph.
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Table of Contents
Related Manuals for Sekonic ST-50M
Summarization of Contents
Safety Information
Pictorial Symbols
Explains the meaning of safety symbols used in the manual.
Examples of Pictorial Symbols
Provides visual examples of warning and caution symbols.
Pre-Use Checks
Accessory Confirmation
Verifies that all specified accessories are provided with the instrument.
Machine Call-outs
LCD Screen Indicators
Details the various indicators displayed on the LCD screen.
Installation Guide
Mounting and Placement
Provides instructions for correctly installing and positioning the instrument.
Battery and Pen Setup
Inserting Dry Batteries
Instructions for installing or replacing the instrument's D-size batteries.
Pen Management
Replacing Recording Pens
Guide on how to install or replace the temperature and humidity recording pens.
Connectivity Options
Connecting AC Adapter
Details on how to connect the AC adapter for power supply.
Connecting Extension Cable
Instructions for using an extension cable for remote sensor measurements.
SD Card Operations
Inserting SD Card
Steps for properly inserting an SD card into the ST-50M model.
Removing SD Card
Steps for safely removing an SD card from the ST-50M model.
Basic Operation
Starting and Stopping Recording
How to initiate and cease the data recording process.
Adjusting Chart Speed
Procedure for changing the chart paper's recording speed.
Selecting Temperature Units
How to switch between Celsius and Fahrenheit for temperature readings.
Enabling Power Saving Mode
Instructions for activating the power saving mode to conserve battery.
SD Card Data Writing
SD Card Writing Functionality
Overview of how the ST-50M writes data to an SD card.
SD Card Data Management
Starting/Stopping SD Card Writing
Procedures for beginning and ending data transfer to the SD card.
Changing SD Card Writing Interval
How to adjust the frequency of data writing to the SD card.
Date and Time Settings
Changing the Date
Steps for setting or updating the instrument's internal date.
Changing the Time
Steps for setting or updating the instrument's internal time.
SD Card Initialization
Initializing the SD Card
Procedure for formatting an SD card, which erases all data.
Alarm Configuration
Setting Temperature Alarms
Procedures for setting upper and lower temperature alarm limits.
Setting Humidity Alarms
Procedures for setting upper and lower humidity alarm limits.
Initializing Alarm Settings
How to reset all alarm settings to their default values.
Display Indicator Navigation
Cycling Through Indicators
Explains how to use keys to switch between different display indicators.
Detailed Display Indicators
SD Card Recording Cycle Indicator
Shows the current SD card recording cycle setting.
Date and Time Indicators
Explains the display of current date and time.
Normal Measurement Screen Details
Describes the main measurement screen, including SD card status.
Recording Range Indicators
Shows indicators for selected temperature and humidity recording ranges.
Useful Functions
Pen Trace Offset Compensation (POC)
Function to align time axes of temperature and humidity traces.
Marking Function
How to add manual marks to the recorded chart trace.
Displaying Dew Point and Absolute Humidity
How to view dew point and absolute humidity readings.
Sensor Calibration
Humidity Sensor Calibration
Steps for performing one-point or two-point humidity sensor calibration.
Calibrating Temperature Sensor
Guide for calibrating the instrument's temperature sensor.
Humidity Calibration Details
Calibrating Humidity Sensor (33% RH)
Specific steps for 2-point calibration at 33% RH.
Calibrating Humidity Sensor (75% RH)
Specific steps for 2-point calibration at 75% RH.
Calibrated Value Initialization
Initializing Calibrated Values
How to reset sensor calibration settings to factory defaults.
Pen Position Adjustment
Checking Pen Position Status
How to view the current pen position adjustment status.
Adjusting Pen Positions
Adjusting Temperature Pen Position
Procedure to adjust the physical position of the temperature recording pen.
Adjusting Humidity Pen Position
Procedure to adjust the physical position of the humidity recording pen.
Pen Position Initialization
Initializing Pen Position Values
How to reset pen position adjustments to factory defaults.
Maintenance Procedures
Periodic Inspections
Regular checks recommended for maintaining instrument performance.
Component Replacement
Sensor Assembly Replacement
Steps for replacing the entire sensor unit.
Clock Backup Battery Replacement
Guide for replacing the internal battery that powers the clock.
Troubleshooting Guide
General Troubleshooting Tips
Common issues and their solutions for instrument malfunctions.
Error Message List
A comprehensive list of error codes and their meanings.
Data File Specifications
File Naming Conventions
Details the format and assignment of data file names.
Data File Content Structure
Explains the format and meaning of data recorded in CSV files.
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