SIM-Q MKII
Installation/operation instructions
DEIF A/S
Page 10 of 18
1114020xxxA
3.4
Configuration of the measuring range
The SIM-Q MKII can be configured for measuring range 1 M
Ω
to 0 M
Ω
(1000 to 0 k
Ω
) with 22 k
Ω
on the scale centre, or for 10 M
Ω
to 0 M
Ω
with 220 k
Ω
on the scale centre. The figure above
shows the position of the switch for selection of either 1 M
Ω
or 10 M
Ω
measuring range. Notice
that a change of measuring range also involves a change of scale. Change of scale can be done
by following the instructions below.
Figure 2
•
Interrupt signal/supply to the terminals before you exchange the scale.
•
Push the scale cover towards the rear edge.
•
Remove the scale by means of a screwdriver or the like.
•
Insert the new scale and press gently till it snaps into place.
•
Push the scale cover back again; after this the unit is ready for mounting.
3.5
Adjustment of the set point
The warning set point is adjusted on the rear of the
housing by means of a screwdriver, see the figure
to the right. Also in test mode, the actual set point
is shown on the meter, and it can be reconfigured
on the rear of the housing. When you power up the
product, the first 10 seconds (default) are used to
show the actual set point that is configured on the
meter.
Two ranges available:
13 k
Ω
to 200 k
Ω
or 40 k
Ω
to 1.5 M
Ω
.
See example on the label to the right.
Typical setting:
Insulation resistance corresponding to position of the red marking pointer or lower limit of the
section marked with red on the instrument scale. Typically, the insulation alarm limit is 1 k
Ω
per
volt. For example, 400 V system voltage could have an alarm limit of 0.4 M
Ω
.
If needed, the precise set point can be pre-set in the product from DEIF before delivery (fixed set
point). See data sheet, section "Order specifications".
If you want precise alarm settings, a known resistor corresponding to the red section on the
instrument scale must be connected between P and PE. Then adjust the potentiometer until alarm
is transmitted. For fast response, set the switch on the front in the fault-finding position.
