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Summary of Contents for Fluke 961A
- Page 1 961A/961B/961C Temperature Humidity Logger Users Manual April 2023 (English) © 2023 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
- Page 2 Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price.
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Page 3: Table Of Contents
Contents Title Page Introduction ..............................1 How to Contact Fluke ..........................1 Safety Information ..........................2 Product Familiarization ..........................2 Standard Packaging..........................2 Model Comparison Table ........................3 Operation Features ..........................4 Components and Controls ......................4 Screen ............................7 Basic Operation ............................ -
Page 5: Introduction
Introduction The 961A/961B/961C Temperature Humidity Logger (the "Product" or "Logger") is a battery-powered temperature and/or relative humidity measuring and logging instrument. The 961A/961B/961C are widely used in various aspects of warehousing and cold-chain logistics, including reefer containers, refrigerated trucks, cooler bags, cooling cabinets, refrigerators, laboratories, etc. -
Page 6: Safety Information
Fluke Technical Service Center or the Service Center in place of purchase. If you need to reship the Product, please use the original package. If the original package is not available, a new package can be ordered from Fluke according to the Product’s model. Figure 1 Table 1 list the standard items that comes with the Product. -
Page 7: Model Comparison Table
Temperature Humidity Logger Product Familiarization Figure 1. Standard Equipment Table 1. Standard Equipment Item Description 961A 961B 961C The Temperature humidity logger External temperature probe External temperature humidity probe CR2450 battery (installed) Holder Included documentation, including a Quick Reference Guide... -
Page 8: Operation Features
961A/961B/961C Users Manual Table 2. Model Comparison Table Features 961A 961B 961C √ Built-in sensor √ √ External sensor √ √, ultra-low temperature √ Temperature measurement √ √ Humidity measurement Sensor type Digital temperature and PT100 platinum Digital temperature and... - Page 9 Temperature Humidity Logger Product Familiarization Figure 2. Product Features Table 3. Product Features Item Description Power button The power button has these functions: Power on/off: Push and hold for 2 seconds to turn the Logger on or off. Turn On/Off the Logger for details.
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Page 10: Screen
Use the Logger for more details. LCD display Screen for details. Built-in sensor Built-in temperature and humidity sensor. (961A only) External temperature sensor (961B only) or external temperature/humidity External sensor sensor (961C only). Battery See the Change the Battery for more details. -
Page 11: Screen
Temperature Humidity Logger Product Familiarization Screen Figure 3. Screen Table 4. Screen Items Indicator Description Current time/points The multi-purpose area can show the current time of the Logger or data points when switching the screen by pushing : The multi-purpose area shows current date and time of the Logger. -
Page 12: Basic Operation
961A/961B/961C Users Manual Indicator Description flashing: The current logging mode is Timed Start or Delayed Start mode, and the Logger is waiting for the trigger to start logging. See the Logger for more details. Alarm indicator The Logger can be set with up to 3 high temperature alarms and 2 low temperature alarms, as well as 2 humidity alarms. -
Page 13: View The Live Measurements
Temperature Humidity Logger Basic Operation Start Mode: • Immediate Start (via the FlukeLog software) • Press Button • Timed Start (via the FlukeLog software) Stop Mode: • Press Button • Use Software For more information on various start and/or stop modes, please see section Use the Logger. -
Page 14: Use The Logger
961A/961B/961C Users Manual 3. Plug the Logger directly into the PC's USB port via the USB plug. The mode status LED and alarm status LED on the panel of the Logger stay on, and "USb" shows on the screen, indicating successful connection. - Page 15 Temperature Humidity Logger Use the Logger...
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Page 16: Configure The Logger's Parameters
961A/961B/961C Users Manual Stop Logging Loading Figure 6. Use the Logger Configure the Logger’s Parameters Configure the Logger via the FlukeLog software before using it for the first time or for repeated use, unless the Logger is used exactly as the default configuration. - Page 17 Temperature Humidity Logger Use the Logger 2. Start the FlukeLog software on the PC. The FlukeLog automatically detects the connected Logger and automatically starts reading and downloading data, as shown below. Wait until the FlukeLog completes downloading data and automatically closes the Download dialog box.
- Page 18 961A/961B/961C Users Manual Parameters Description Start Mode The Logger has these start modes. Immediate Start: Logging starts immediately after the Logger is unplugged from the Press Button: After the Logger is set up, the Logger is in standby until you push to start logging.
- Page 19 Temperature Humidity Logger Use the Logger Parameters Description Circular Whether to allow the earliest data to be overwritten and to continue logging when the memory is full. Logging Enable: If the Logger is full before the stop logging condition is reached, it will automatically overwrite the earliest data and continue logging.
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Page 20: Factory Defaults
961A/961B/961C Users Manual Factory Defaults The default value of the Logger before delivery is shown in Table Table 6. Defaults Settings Parameters Defaults Parameters Defaults Screen Display Time Keep on Set Password None Logging Interval 15 minutes Start Delay UTC +8:00... -
Page 21: Mark Events (Optional)
Temperature Humidity Logger Use the Logger Press Button Note If the Logger is turned off, turn on the Logger by following the instructions in Turn On/Off the Logger. In Press Button start mode, the Logger enters the standby state after disconnecting from the PC and the current measured temperature and/or humidity shows on the Logger’s screen, as shown below. -
Page 22: Pause/Stop Logging
961A/961B/961C Users Manual 2. LED flash twice rapidly at the same time to indicate events are marked successfully. The Logger screen briefly shows the symbol , the success icon and the number of data points currently marked, as shown below. -
Page 23: Download Data
Temperature Humidity Logger Use the Logger Download Data The Logger can be connected to a PC with USB port to download data either when logging is stopped or during logging. You can read data from the Logger regardless of whether the FlukeLog software is installed. Download Data Without Using the Software 1. -
Page 24: Flukelog Software
Exchange data with other FlukeLog software users. Download and Install the FlukeLog Software On your PC, go to www.fluke.com to search FlukeLog. 1. Download the FlukeLog software to your PC according to the instructions on the Product page. 2. On your PC, follow the instructions to install the FlukeLog software. (Administrator privileges are required for the installation.) -
Page 25: Product Disposal
Temperature Humidity Logger Maintenance To change the battery: 1. Turn the Logger off and place it face down on a firm, flat table. 2. Align a flat screwdriver or a coin with the groove on the battery compartment cover, then rotate the cover 90 °... -
Page 26: Specifications
961A/961B/961C Users Manual Specifications General Specifications 961A 961B 961C Temperature Operating -30 °C to 70 °C (the Logger) Storage -30 °C to 70 °C (the Logger) Altitude Operating 2 000 m Storage 12 000 m Relative Humidity Operating 0 % RH to 100 % RH, non-condensing Storage <75 % RH... -
Page 27: Detailed Specifications
Temperature Humidity Logger Specifications Detailed Specifications 961A 961B 961C Sensor Type Built-in External External Temperature Measurement Range -30.0 °C to 70.0 °C -85.0 °C to 150.0 °C -40.0 °C to 85.0 °C Accuracy ±0.4 °C ±(0.3 + 0.005 x ±0.4 °C |reading|) °C... - Page 28 961A/961B/961C Users Manual...
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