Rice Lake Simulators - Manual (Page 11)

Ranger 7 Simulator Operation 7
3. Calculate the required wattage using
((ExcV x ExcV)/R) x 1.5
. Use the next highest wattage value.
In a 16 load cell example, the 22 ohm resistor will have to be rated at least 6.8W. 7W is a common size. 
If the excitation voltage is higher, a higher wattage resistor will be required.
Note
To achieve highest performance, low thermal EMF wiring and components are required. A manufacturer of the
binding posts is Low Thermal Electronics, they can provide low thermal spade lugs to mate to the binding
posts.
3.2 Offset
Offset will add or subtract up to ±25µV/V (±0.025mV/V).
1. Press the
Offset
switch to enable the function.
2. Rotate the knob to the desired setting.
3. Press the
Offset
switch again to disable the function.
3.3 Variable
Press the
Variable
switch to enable/disable the function.
There are two ranges of variable mV/V.
3.3.1 Coarse Control Range
The range is 0 to 500µV/V (0 to 0.5mV/V) plus the setting of the far left knob.
This range disables and replaces the center 0.1mV/V and right 0.01mV/V switches. The variable range is Switch
one plus the variable switch and will range from 0 to 0.5mV/V.
1. Press and release the
Variable
switch to enable the function.
2. Adjust the setting as required.
3. Press and release the
Variable
switch again to disable the function.
3.3.2 Fine Variable Setting
In the fine setting, the variable switch disables and replaces the far right 0.01mV/V switch. So the variable range is
switch one plus switch two plus the variable switch, it will range from 0 to 0.1mV/V.
1. Press and hold the variable switch (you must start from
Off
).
2. When the second LED (labeled 0.1mV/V) lights release the switch pushbutton.