HH2 Moisture Meter

Question

How do I upload the WET sensor calibration file into the HH2 handheld reader unit?

Answer

This can sometimes happen if the battery connector terminals are accidentally shorted out when changing the battery or if the user takes longer than 30 seconds to replace the battery. If this happens, the HH2 is cold booted, the memory is erased and the factory default settings are restored.

You will need to re-load the WET calibration file back onto the HH2:

1. Quick method for users with HH2 firmware 2.9 or above (Aug 2017).
Requirements:
HH2 firmware version 2.9 or above.
WET sensor serial number: WET-27/001 or later.

• Connect the WET sensor to the HH2

• Turn the HH2 on> press SET> scroll up to ‘Load WET Cal’> press SET> scroll to ‘Load Standard’ (default) or ‘Load extended’ (if you are using the WET sensor in high salinity conditions)> press SET.

• The HH2 will display ‘Reading Calib’n’, then say ‘Calib’n Loaded’. Press Esc back to the main menu and take a reading – the WET sensor should now be automatically selected and will take a reading.

• If the HH2 displays ‘Cal Read ERR’, then the WET sensor may have a problem or be too old to work with this function. Contact Delta-T or try the normal PC method below.

• Don’t forget to check other settings such as temperature compensation, units and soil type.

• If you want to verify the cal file has been installed, go to options>status>versions>WET Calib’n to check the number matches your sensor. If the file starts with ‘WET’ you have the standard calibration loaded in and if the file starts with ‘WEX’, you have the extended calibration loaded in.
 
 
2. Normal PC method

• Install the ‘HH2Read’ software on to your computer – if necessary, you can download it from our website: http://www.delta-t.co.uk/software-downloads.asp.

• The calibration file, for older WET sensors, is supplied on the CD that comes with the WET sensor (picture of a WET sensor on the CD, with the serial number on). If you don’t have this CD, or your computer doesn’t have a CD drive, you can download the file directly from our website: http://www.delta-t.co.uk/product/wet-2/#support. Alternatively, contact Delta-T tech support and we’ll send you the calibration file via email.

• Connect the HH2 to your PC using the 25w to 9w adaptor and the serial cable (2 separate parts).
If your computer does not have a 9pin serial port in the back of it, you will need to purchase a USB to RS232 adaptor. We can provide one of these, if necessary (sales code: USB-RS232), or you can purchase one locally. If you do purchase one locally we recommend that it has an ‘FTDI’ chipset in it.

• If you have stored any readings, you’ll need to erase the data:
Turn the HH2 on> press SET> scroll to data> press SET> scroll to erase> press SET> scroll to YES> press SET.

• Make sure the HH2 is switched off before trying to communicate with it:
Press the ESC key to exit out of the menu structure, then press ESC once more to turn the unit off. Alternatively wait for it to go to sleep automatically after 30 seconds.

• Run the PC program HH2Read (you need version 1.82 or later).

• If you have the CD, insert into your CD drive on the computer.

• In HH2Read select Install> Sensors Calibration> WET Sensor.

• Navigate to the CD drive on your computer or the PC save location, if you downloaded form our website. Then select the WET sensor calibration file.

• In a few minutes the program should report the calibration file successfully installed.

• Once the file has been loaded back on, please select the WET sensor device option in the HH2:

 ◦ Turn the HH2 on
 ◦ Press the SET button
 ◦ Scroll down to Device
 ◦ Press SET
 ◦ Scroll down to WET sensor
 ◦ Press SET
 
• Don’t forget to check other settings such as temperature compensation, units and soil type.

You should now be ready to take readings again.

Question

How do I cold boot (reset) the HH2 Moisture Meter Readout Unit?

Answer

To cold-boot the HH2 proceed as follows:

1. Disconnect the battery.
2. Short out the battery connection terminals with a metal object, e.g. a screwdriver blade.
3. Reconnect the battery: snap the connector in place in a single continuous action.
4. While doing so, observe the display and ensure that:
   a) the entire display blacks out
   b) no error messages are displayed
   c) the title screen ‘Delta-T Devices Moisture Meter’ is displayed.

As all volatile memory will be cleared, you’ll have to check your settings are ok (soil calibration, for example) and change if necessary. Also, if you are using a WET sensor, you’ll have to load the WET calibration file back on (see other FAQ about this).

Question

How do I set up my USB to RS232 convertor? - Photo Guide

Answer

1. These convertors usually come with a website link to visit and download the drivers. Please make sure you download the drivers. Then follow all the on-screen instructions correctly.
2. If you have purchased the device from Delta-T, you can download the drivers from here: https://www.dropbox.com/s/2pu0ll8b26y8qkm/CDM212364_Setup.exe?dl=0 or here: https://ftdichip.com/drivers/vcp-drivers/
3. Once the drivers have been installed correctly, plug the USB convertor into a USB port on your PC.
4. The computer will then assign the convertor a COM port. You will need to check which com port has been assigned via the computer’s “device manager”:

Windows 10
Use the search tool in the bottom task bar to search for ‘device manager’:

Windows 8
Right click on Desktop background and select ‘All Apps’

Right click on control panel and select ‘properties’:

Click on Device Manager:

Windows 7

Click on Start, Control Panel, Device Manager:

XP

Click on Start, Control Panel, System:

Under the ‘Hardware’ tab, click on ‘Device Manager’:

• Once in the device manager, expand the “ports” option. The example below shows a P.C which has the USB to serial converter installed (COM3):
  
• Please make sure that you use this same COM port number in the device software e.g. HH2read, SunRead, LS2win, DeltaLINK, AP4 retrieve.
• You will probably have to re-boot the P.C once the drivers have been installed.
• Also, please remember to use the original RS232 cable, that was supplied with your device, in series with the RS232 to USB converter.

Multiple USB convertor Installations check

If you have more than one USB to RS232 convertor installed, you can check which COM port has been assigned to the one you want to use, by doing the following:

• Unplug the USB convertor
• Open Device Manager > Ports (COM & LPT)
• Plug in the USB connector and observe which COM port is added to the list.