Laurel Electronics LAUREATE SERIES 2 DIGITAL PANEL METER - Manual (Page 34)

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15. RTD & RESISTANCE INPUT
The standard RTD and resistance signal conditioner board can be configured via jumpers for
four RTD types (DIN 100Ω platinum, ANSI 100Ω platinum, 120Ω nickel, 10Ω copper) or five
resistance ranges (from 20.000Ω to 200.00 kΩ). A fixed 2 MΩ resistance range (R6 ordering
option) is provided by a factory modified signal conditioner board with component changes.
All ranges are factory calibrated with calibration factors stored in EEPROM on the signal
conditioner board. The meter software recognizes the board and will bring up the appropriate
menu items for it; however, it does not recognize the jumper settings. With RTDs, display in °C
or °F and resolution of 1°, 0.1° or 0.01° are user programmable.
SIGNAL CONDITIONER BOARD SETUP VIA JUMPERS
1. Program decimal point selection under dEc.Pt menu item.
2. Letters indicate jumper position. Jumpers are installed on pins adjacent to letters.
3. Store spare jumpers on an unused jumper post.
SCALE & OFFSET SETUP
Scale is normally set to 1.0000. Scale can be used as an RTD correction when actual
resistance is other than nominal, as stated on the RTD calibration sheet. For a Pt100 RTD,
divide 100 by the stated resistance at 0°C. For example, for a 99.04 ohm RTD, scale should be
set to 100 / 99.04 = 1.0097.
SIGNAL SHIELDING
Shielding for noise reduction
200 kΩ ranges and above measurements are susceptible to signal noise. To minimize noise
pickup, the input signal wiring should utilize a shielded twisted pair and the shield should be
connected to signal low and earth ground at the meter, as illustrated. Use 2-wire hookup.
Standard Board Modified Board E1 Jumper
Pt100, Ni120
Cu10, 20.000Ω
0 - 200.00Ω
0 - 2.0000 kΩ
0 - 20.000 kΩ
0 - 200.00 kΩ N/A
N/A
N/A
N/A
N/A
0 - 2.0000 MΩ a
b
c
d
e
f
Connection E2 Jumper
2 or 4 wire
3 wire none
g