SIM-Q MKII
Installation/operation instructions
DEIF A/S
Page 15 of 18
4.1.3 Test mode
Test mode
Power LED is on
Status LED is on
Warning LED is on
Meter shows insulation resistance set
point
Relay is activated
4.2
Response time graphs
The response time of the SIM-Q MKII is dependent on several different factors such as
configuration, settings, capacity in the system and, of course, the resistance itself. The total
response time is opposite proportional with the capacity and the resistance. This means that if
great capacitance and insulation resistance is present in the application, there will be a long
measuring time before the cycle is finished. If the capacity or the resistance gets smaller, the SIM-
Q MKII will reduce the response time.
To comply with IEC 61557-8, the response time must be lower than 30 minutes, which is marked
as the blue area in the graph below.
Outside the blue area, the product will still perform but it will not meet the 30 minutes response
time limit stated in IEC 61557-8.
So, when you select a set point (Ran) in systems with 2000 µF setting, be aware of the resulting
response time.
