Honeywell HX2 Reference Manual page 291

To get this Key / Function
8
9
0
. (period)
/
* (asterisk)
- (dash or minus sign)
Special Keys
Press these Keys in this Order
Mode)
8 and 8888 (Alpha
Mode)
9 and 99999 (Alpha
Mode)
0 and 00 (Alpha
Mode)
Alpha 1
Alpha 11
Alpha 111
Alpha 1111
7-5