Graupner Receiver GR-12S HoTT : User's Manual : Page 4

3.3. Temperature warning

If the receiver temperature falls below -10° C or exceeds +70° C, the transmitter’s RF module generates

a temperature warning in the form of a “general alarm sound”: a steady beeping at intervals of about

one second.

4. FIRMWARE UPDATE GRAUPNER-HOTT 2.4 RECEIVER 33505 / 33506

Firmware updates for the transmitter RF module or receiver can be transferred via the DATA or telemetry

interface in conjunction with a PC running Windows XP, Vista or 7. For this you also require the USB

interface, Order No. 7168.6, and the adapter lead, Order No. 7168.6A, which are available separately.

When using the receiver GR-12S (Order No. 33505) the adapter cable Order No. 23048 is also nee-

ded.

The programs and ﬁ les required for this are available from www.graupner.de in the Download area for

the corresponding products.

Install the Firmware Update Utility Graupner and the USB drivers on your computer. Check the system

requirements!

The ﬁ rst step is to cut through the central red wire in the adapter lead,

Order No. 7168.6A, then connect the lead to the USB interface, Order

No. 7168.6. This socket is also polarised; note the small chamfer on one

edge. Never use force - the plug should engage easily and fully.

4.1. Receiver

Receiver GR-12 (Order No. 33506):

Connect the adapter lead to the socket Channel 5 of the receiver, as

shown in the illustration. This socket is also polarised; note the small

chamfer on one edge. Never use force - the plug should engage easily

and fully.

The black wire (-) must be on top, the white wire (T) down.

Receiver GR-12S (Order-No. 33505): the adapter cable Order No. 23048

is also needed.

4.2. Update procedure

Ensure that the adapter lead is conﬁ gured as shown in the illustrations, and is connected correctly to

the transmitter or receiver.

Start the Graupner Firmware Update Utility.

Under [COM Port Setup] select the correct COM port, i.e. the

one to which the USB lead is connected. If you are not sure of

this, press the button „Search“ and select in the pop-up window

„Silicon Labs CP210x USB to UART Bridge“ and press „OK“.

Baud Rate: 19200.

Under [Interface Type] click on Signal 2:Vcc3:Gnd.

Now click on the “Browse” button and select the folder con-

taining the previously loaded ﬁ rmware ﬁ le ending in *.bin. If

everything is correct, the ﬁ le will appear in the corresponding

window.

The ﬁ rmware ﬁ les are encoded in product-speciﬁ c form, i.e. if

you accidentally select a ﬁ le which does not match the product (e.g. transmitter update ﬁ le instead of

receiver ﬁ le), then the pop-up window “Product code error” will appear, and you will not be able to start

the update procedure.

03 Manual Receiver GR-12 Graupner HoTT 2.4

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Manual Receiver GR-12 Graupner HoTT 2.4 08