Federation Football Rule Change 2019

The NFHS has approved the Ready for Play Timing Rule Change. Here’s how to update your Ready-Ref Timers and Clocks.

Personal Timers

If your serial number is 1100001 or higher (purchased since October 2011), we will convert the timing for $20, plus $12 for return shipping. (If you live in Ohio, there will be an additional $1.45 tax.)

If your serial number is lower than 1100001 (purchased before October 2011), we will replace the circuit board for $50, plus $12 for return shipping. (If you live in Ohio, there will be an additional $3.63 tax.)

Please send us the Personal Timer with your payment (make checks payable to “Grimm Scientific”) and a note with your address, phone number, and a message about what you want changed. We will make the conversion and send it back to you. We recommend USPS Priority Mail.

For USPS Shipping (Reccomended):               
Grimm Scientific Industries, Inc.
PO Box 2143
Marietta, OH 45750

For UPS or FedEx Shipping:                 
Grimm Scientific Industries, Inc.
707 Gilman Avenue
Marietta, OH 45750

Field Clocks

If your transmitter has Serial Number 1320xxx, we are able to convert your field clock system to the new 25-40 second rule. This conversion will cost $20 for each transmitter, plus $15 for return shipping.

To make this change, please send us the following:

• The transmitters
• The circuit board (located near the top in the back of your field clock)
• The antenna (attached to circuit board)
• Note with your address, phone number, and a message about what you want changed
• Your payment ($55) (If you live in Ohio, there will be an additional $2.90 tax.)

NOTE: Before removing the circuit board, please take a photo of the board for your own reference.

If your transmitter has Serial Number 1220xxx or is some other model, please contact us on our contact page (click here) to discuss your conversion options.