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OCM642 Programmierbare Widerstandsdekade
I/D (device identification)
*IDN?
Response contains name of manufacturer, model type number, serial number, firmware
version
Example :
If query „*IDN?<cr>" is sent, the decade returns response:
„OCM642,622351,1.2 <cr><lf>".
R0 setting / reading
R (?) <DNPD>
Command sets resistance value R0 at temperature 0 C. Set value R0 is valid for all types of
simulated temperature sensors.
<DNPD>
It represents resistance value R0 in . Limits are shown in chapter Technical data. OCM642
confirms execution with string „Ok<cr><lf>". In case of query OCM642 returns set value in
.
Example :
„R100<cr>" sets value R0 to 100  (Pt100, Ni100).
After query „R?<cr>" the decade returns string „100<cr><lf>".
Temperature unit setting
U <CPD> { 0 | 1 | 2 }
Command sets used temperature unit.
 sets degree Celsia C
0
 sets degree Fahrenheita F
1

2 sets Kelvin unit K
OCM642 confirms execution with string „Ok<cr><lf>".
Example :
„U0<cr>" sets C as temperature unit.
Status reading
V?
OCM642 returns device status in form „FxUx<cr><lf>". On positions of signs „x" there are
values corresponding to the actual status of the decade.
Example :
After query „V?<cr>" the decade returns for example string „F2U0<cr><lf>", which means Pt
(90), C actual setting.
Correctly executed command is confirmed with string "Ok<cr><lf>. When correct query is
received OCM642 returns response in above described format. All commands must contain
sign <cr> or <lf> at the end. Both small and large letters can be used.
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