VTI Instruments EX1401, User Manual

Page: 108 / 114

VTI Instruments Corp.
108 EX1401 Calibration
S
AVE
2.5V
REFERENCES
This procedure is performed to save all measured reference values in the non-volatile memory of
the EX1401 instrument. This procedure involves manually editing the calibration coefficients file,
which must be performed with care.
13. Repeat the steps in the Error! Reference source not found. section, but this time use the
JSON editor to copy the 2.5V reference values obtained in the previous section to the
calibration file, at “References”, “Channels”, “VREF”.
If the Load By Default checkbox in the ‘User Full Calibration window is selected when the unit is
reset, the EX1401 will operate from the new coefficients. If Load By Default is not selected when
the unit is reset, it will operate from factory calibration coefficients saved in non-volatile memory
C
USTOM
C
ALIBRATION
C
ABLE
B
UILD
I
NSTRUCTIONS
You can build your own calibration assembly using the recommended parts listed in Error!
Reference source not found. . Note the polarities of Thermocouple plug, before making permanent
connections.
Ectron
x16
F
IGURE
8-3: C
USTOM
C
ALIBRATION
C
ABLE
A
SSEMBLY
Item Qty
Gold Plated Banana Plug, Red, Pomona Electronics 5406-2, or equivalent 1
Gold Plated Banana Plug, Black, Pomona Electronics 5406-0, or equivalent 1
Mini Thermocouple Plug, Cu-Cu, Omega SMPW-CC-U-M, or equivalent 16
Tubing, Heat Shrink, Black, ½” Diameter, or equivalent
3 in
Wire cable, 24AWG, Shielded Twisted Pair, Belden 82641, or equivalent 8.5 m
T
ABLE
8-1: M
ATERIALS
N
EEDED FOR
B
UILDING
C
ALIBRATION
C
ABLE