Yokogawa Wireless Temperature Transmitter YTA510 - Manual (Page 20)

IM 01C50T03-01E 3-13
3. OPERATION
Table 3.1 Zero and Gain point value for Sensor
trim
T0301.EPS
Sensor type
Setting value
TC B,R,S,T +0[mV] +25[mV]
E,J,K,N,W3,W5,L,U, mV +0[mV] +75[mV]
RTD Pt100,JPt100,NI120,Cu +40[ohm] +330[ohm]
Pt200, Pt500, ohm +40[ohm] +1600[ohm]
Zero-point Gain-point
5) Enter the current input value in J10: SNSR1 ZERO
(or K10: SNSR2 ZERO for YTA320).
6) Press [ENTER] twice and press [OK].
7) Perform gain-point adjustment if “V.R./
ZERO&GAIN” or “TEMP/ZERO&GAIN” is
selected in J07:IN TRIM MODE.
• When the input trimming mode is “V.R./
ZERO&GAIN” apply the value for the gain-point
shown in the Table 3.1 depending on the speci-
fied sensor type. Wait until the input from the
calibration device becomes stable.
• When the input trimming mode is “TEMP/
ZERO&GAIN”, expose the temperature sensor to
calibration temperature for the gain-point. Wait
until the input from the temperature sensor
becomes stable.
8) Enter the current input value in J20: SNSR1 GAIN
(or K20: SNSR2 GAIN for YTA320).
9) Press [ENTER] twice and press [OK].
NOTE
• First correct the ZERO point, then correct the
GAIN point in two points calibration. When the
GAIN point is adjusted, the ZERO point
correction amount is also updated and written
into the EEPROM.
• The calibration unit is changed to “mV” or
“ohm” depending on the type of connected
sensor when the input trimming mode is “V.R./
ZERO&GAIN” or “V.R./ZERO” or to tempera-
ture unit selected at D41:SNSR1 UNIT.
(b) Returning to the factory set value
J05: SNSR1 CLR
K05: SNSR2 CLR ...YTA320 only
To return to the factory set value, set “USER CAL
CLEAR” or “USER CAL IGNORE” at J05: SNSR1
CLR for the Sensor1 and K05: SNSR2 CLR for the
Sensor2.
USER CAL CLEAR : Clear user trim value
and return to the
factory set value.
USER CAL IGNORE : Ignore user trim value
and return to the
factory set value.
USER CAL ACT : Use user trim value.
NOTE
Regardless of restarting the transmitter, the
“USER CAL ACT” is always set and the user
trim value is used as the input signal unless it is
cleared by “USER CAL CLEAR.”
3.2.15 Output Trim
(a) Zero/Gain Point Adjustment
L10: OUTPUT MODE, L20: OUT ZERO, L30: OUT GAIN
The output adjustment function can match the 4 mA
and 20 mA output of the temperature transmitter to the
reference meter such as a voltmeter.
1) Connect the temperature transmitter, 250
Ω
resistance and the voltmeter as shown in Figure 3.2.
2) Select L10: OUTPUT MODE and press [OK].
3) Select “MANUAL MODE 4mA” and press
[ENTER] twice.
(4 mA output status continues for 10 minutes.)
Press [OK].
4) Select L20: OUT ZERO and press [OK].
5) Write the indicated value of the voltmeter to L20:
OUT ZERO and press [ENTER] twice.
(The temperature transmitter automatically corrects
the difference between this value and the operation
output.)
Press [OK].
6) Select L10: OUTPUT MODE and press [OK].
7) Select “MANUAL MODE 20mA” and press
[ENTER] twice.
(20 mA output status continues for 10 minutes.)
Press [OK].
8) Write the indicated value of the voltmeter at L30:
OUT GAIN and Press [ENTER] twice.
(The temperature transmitter automatically corrects
the difference between this value and the operation
output.) Press [OK].
Note 1:First correct the ZERO point, then correct the GAIN
point. If the ZERO point is not adjusted, GAIN point is
not corrected.
(b) Returning to the factory set value
L05: OUT CLR
To return to the factory set value;
USER CAL CLEAR : Clear user trim value
and return to the
factory set value.