Rice Lake PR6201 Zinc-Plated Steel Star Mount Kits - Manual (Page 24)

Compression Load Cell PR 6201 Installation Manual
EN-22 Sartorius
7.2 Checks with Multimeter
7.2.1 Check Zero Output Signal of Load Cell
• Unload load cell.
• Disconnect the load cell outputs.
• Check whether the output voltage without load is within the limits.
Type Zero output signal
L 0 mV ±0,02 mV/V
D1/N/C3 0 mV ±0,01 mV/V
(at PR 6201/54.. 0 mV ±0,02 mV/V)
LA 3,2…4 mA
GAIN connected to +Supply Voltage 24 ±4 V, see chapter 5.2.2.1
7.2.2 Check the Strain Gauge Bridge
Note: Not for load cells type LA.
• Do not exceed the test voltage.
• Check whether the values of the resistors are within the permissible limits.
Maximum test voltage
Standard industrial 32 V DC
Intrinsically safe version (PR …/..E) 25 V DC
Type Input impedance
(red core, blue core) Output impedance
(green core, grey core)
L 650 Ω +50 Ω 610 Ω ±3 Ω
D1/N 650 Ω ±6 Ω 610 Ω ±1 Ω
C3 650 Ω ±6 Ω 610 Ω ±0,5 Ω
7.2.3 Check Insulation Impedance of Load Cell
Note: Not for load cells type LA.
• Never apply the test voltage between the cores of the load cell cable (danger of destroying the load
cell).
• Insulate the load cell cores.
maximum test voltage standard industrial 100 V DC
Intrinsically safe version (PR …/..E) 500 V AC
insulation impedance core - housing >5000 M Ω
core - screen >5000 M Ω
screen - housing >5000 M Ω
7.2.4 Check Insulation Impedance of Connecting Cable
• Disconnect connecting cable and load cells.
• Insulate the cores of the connecting cable.
insulation impedance core - core ≥600 MΩ × km
core - screen ≥600 MΩ × km