The H2 ITMY L1 Open Light voltages were recorded with a 30-second average of the H2:SUS-ITMY_L1_OSEMINF_*_IN1_DQ channels with the OSEMs completely backed off of their flags.  Their values were halved, multiplied by (-1), and entered into the H2:SUS-ITMY_L1_OSEMINF_*_OFFSET channels.  The gains for these channels were calculated by normalizing the open light counts to 30,000cts.

controls@cdsws2:/ligo/svncommon/SusSVN/sus/trunk/QUAD/H2/ITMY/SAGR0/Data 0$ tdsavg 30 H2:SUS-ITMY_L1_OSEMINF_UL_IN1_DQ H2:SUS-ITMY_L1_OSEMINF_LL_IN1_DQ H2:SUS-ITMY_L1_OSEMINF_UR_IN1_DQ H2:SUS-ITMY_L1_OSEMINF_LR_IN1_DQ
27866.8
25170
29253.2
23004.8

Open Light (cts)
UL = 27866.8
LL = 25170
UR = 29253.2
LR = 23004.8

Offsets [(open light)/2] (cts)
UL = -13933
LL = -12585
UR = -14627
LR = -11502

Gains [30000 / (open light)] 
UL = 1.077
LL = 1.192
UR = 1.026
LR = 1.304

Open Light cts after normalization (should be ~15000cts)
UL = 15006.8
LL = 15001.3
UR = 15007.3
LR = 14999.7