Chroma 61501, User Manual

Page: 33 / 134

Local Operation
3-7
3.5.2 Vac LIMIT
The setting of Vac LIMIT will restrict the value of Vac in MAIN PAGE. The user can set Vac
LIMIT on SETUP functional list (see 3.5). This command is about user-programmable
protection, not hardware protection.
The procedures for setting voltage Vac LIMIT = 120V, are described as below:
1. Move the cursor to the command line
of “Vac LIMIT = ”. Vac LIMIT = 300.0_
2. Press
1
,
2
,
0
then press
ENTER
to change the value to “120.0”. Vac LIMIT(A) = 120.0
The setting of Vac LIMIT is not restricted by RANGE, but the Vac on
MAIN PAGE is restricted by RANGE. For example, in 150V RANGE,
although Vac LIMIT=200V, the largest value of Vac setting is 150V.
3.5.3 Vdc LIMIT (+), Vdc LIMIT (-)
Vdc LIMIT (+) and Vdc LIMIT (-) limit the setting value of Vdc on MAIN PAGE. The user can
set both on SETUP functional list (see 3.5). The setting value of Vdc cannot be higher than
Vdc LIMIT (+), or can not be lower than Vdc LIMIT (-). Vdc LIMIT (+) must be positive or
zero, Vdc LIMIT (-) must be negative or zero. This command is about user-programmable
protection, not hardware protection.
The procedures of setting Vdc LMT (+)=200V, Vdc LMT (-)=-50V, are described as below:
1. Move the cursor to the command line
of “Vdc LIMIT(+) = ”. Vdc LMT(+) = 424.2_ Vdc LMT(-) = 0.0
2. Press
2
,
0
,
0
then press
ENTER
to change the value to “200.0”. Vdc LMT(+) = 200.0 Vdc LMT(-) = 0.0_
3. The cursor moves to the command line
of “Vdc LIMIT(-) = ” automatically. Vdc LMT(+) =200.0 Vdc LMT(-) = -50_
4. Press
Õ
/ - ,
5
,
0
then press
ENTER
to change the value to “-50.0”. Vdc LMT(+) = 200.0 Vdc LMT(-) = -50.0
1. The setting of Vdc LIMIT is not restricted by RANGE, but the Vdc on
MAIN PAGE still restricted by RANGE. For example, in 150V
RANGE, although Vdc LIMIT = 250V the largest value of Vdc setting
is 212.1V.