Watts LF007 Serie Instrucciones De Instalación página 11

Trim Zero
1. Set the DC calibrator voltage output to +0.0000Vdc.
2. Use the utility software or a Modbus Master program to perform steps 3 and 5.
3. Set all channels to the same range. Start with ±10Vdc range, working downward per values
in Table 3 Range Register Values.
4. Trim Zero on all channels.
a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Retrieve Trim Zero register value for specific range from Table 4 Trim Zero Registers
and Calibration Values.
c. Write value of 0x00h to Range Trim Zero register (that is, 40114 for ±10V).
d. Perform steps 4a to 4c to trim zero on each range.
Trim Span
1. Set the DC calibrator voltage output to +10.000Vdc.
2. Use the utility software or a Modbus Master program to perform steps 3 and 5.
3. Set all channels to the same range. Start with ±0.025Vdc range, working upward per values
in Table 5 Trim Span Registers and Calibration Values.
4. Trim Span on each channel.
a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Retrieve Trim Span register value for specific range from Table 4 Trim Zero Registers
and Calibration Values.
c. Write value of 0xfffe to Trim Span register (that is, 40146 for ±10V).
d. Perform steps 4a to 4c to trim span on each range.
Table 3 Range Register Values
CHANNEL
Channel 0
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Table 4 Trim Zero Registers and Calibration Values
RANGE
±10Vdc
±5Vdc
±1Vdc
±0.1Vdc
±0.05Vdc
±0.025Vdc
RANGE CONTROL
40097
40098
40099
40100
40101
40102
40103
REGISTER
40114
40115
40116
40117
40118
40119
11
RANGE VALUE
00 Disabled
01 ±10V
02 ±5V
03 ±1V
04 ±0.1V
05 ±0.05V
06 ±0.025V
VALUE
0000
0000
0000
0000
0000
0000