Post by jurumy7 on Aug 20, 2024 21:10:18 GMT -5
Hi everyone,
For what I understand, the shield pin (pin 3,6 of DIN connector) should be isolated from the chassis ground (=power cord ground prong).
But when I measure my 336 controller (with all the inputs and power cord, connection cable detached), it shows 1 Megaohm between shield pin and chassis ground, not Over limit.
Why is this happening? Wouldn't this interfere my cryostat's ground as my cryostat's ground (=connected to clean ground which is isolated from power outlet grounds) would be connected to chassis ground by the cable shield, as the 336 manual says one shield should be connected to the cryostat's ground?
I am using 218 & 331 & 336 together for my measurement configuration, so I need to understand why this is happening and how the 336 is different from the others.
Thank you in advance.
For what I understand, the shield pin (pin 3,6 of DIN connector) should be isolated from the chassis ground (=power cord ground prong).
But when I measure my 336 controller (with all the inputs and power cord, connection cable detached), it shows 1 Megaohm between shield pin and chassis ground, not Over limit.
Why is this happening? Wouldn't this interfere my cryostat's ground as my cryostat's ground (=connected to clean ground which is isolated from power outlet grounds) would be connected to chassis ground by the cable shield, as the 336 manual says one shield should be connected to the cryostat's ground?
I am using 218 & 331 & 336 together for my measurement configuration, so I need to understand why this is happening and how the 336 is different from the others.
Thank you in advance.
