Extech Instruments RH550, User Manual

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5. PC Interface
Connect the RH550 to a Windows PC for the purposes of sharing datalog files and screen shot
images. You can also update the RH550 firmware through the PC interface.

The RH550 saves recorded data to a comma delimited CSV file in the RH-T Data folder.

Screen shots will be located in the Pictures folder.

The current RH550 Firmware file is located in the Download folder

The RH550 internal rechargeable battery will charge while connected to a PC USB port.
Windows PC

Connect the USB cable to the RH550 USB jack (2) and then to the PC USB port.

Once connected, the PC will recognize the RH550 as a USB storage device. View the RH550
internal memory as you would any external storage device.
MAC PC

Download the RH550 Android to MAC OS file transfer software from the
Extech.com/Software web site.

On the MAC, Go to Downloads and click on AndroidFileTransfer.dmg.
AndroidFileTransfer will now appear under Devices.

Connect the USB cable from the RH550 USB jack (2) to a MAC USB port.

Under Devices, Click on AndroidFileTransfer and a folder will open.

Click on Android File Transfer folder and you will see the 4 folders from the RH550.
DCIM, Download, Pictures, RH-T Data
6. Screen-Shot Storage
Swipe downward on the RH550 screen with three (3) fingers to store a screen-shot of the current
display. If taking a screen shot of a MENU window, place your fingers at the top of the Menu
window and not at the top of the screen and then swipe down.
Screen shots are stored in the Pictures folder in the RH550 internal storage directory for easy
access. See the section PC Interface for details on working with the RH550 internal memory.
7. Firmware Upgrade
If the RH550 firmware is revised, you can easily update the firmware:
1. Download the firmware file (humiture.apk) from RH550 under the Extech.com/Software
web site.
2. Connect the RH550 to a Windows PC USB port using the supplied USB cable. The PC
should recognize the RH550 as a standard USB storage device.
3. On the PC, Open the folder RH550/Internal Storage/Download and delete any
Humiture.apk files located in this folder.
4. Copy the new firmware file (Humiture.apk) to this Download folder.
5. Disconnect the RH550 USB cable from the PC.
6. Tap the MENU icon on the upper left of the RH550 screen.
7. Tap INFO to open the Information screen.
8. Tap UPDATE.