Emerson manual Specifications, Calibration LTM-300 Output Configurations

3.2Recommended Wiring, Single Loop

SECTION 4. Specifications

4.0 Transmitter Electrical Specifications

Supply Voltage:	15 to 36 VDC
Repeatability:	.005% of full scale or .010”,
		whichever is greater
Non-Linearity:	.01% of full scale or .030”,
		whichever is greater
Level Sensor Accuracy:	.01% of full scale or .020”,
		whichever is greater
Analog Output Resolution: .025% of full scale, (1) 4/20 mA
		primary level.
Output:	One 4-20 mA output:
		Level Option: Two Digital
		Outputs: Temperature and/or
		Interface via HART only.
Calibration:		Zero and span field adjustable
		with push buttons or HART.
		Secondary level is auto-
		connect. Temperature is
		configured via HART or AMS
		only.
Diagnostics:		On board diagnostics for
		troubleshooting via HART or
		AMS
Dampening:		1 to 25 seconds (field
		adjustable) via HART
Oper. Temp. (electronics)	-58 to 185°F (-50 to 85°C)
Housing:	Explosion Proof, Dual
	Compartment, H” NPT, Epoxy
	Coated Aluminum
Polarity Protection:		Diode in series with the loop
Hazardous Location Approvals: FM - Exp Cl l , Div. I Grp. B C D,
		Cl II Grp. E F G, Cl III
CSA - Ex ia (Intrinsically Safe): Cl I, Div. I, Grp. C D
Exp (Expl. Proof): Cl I, Div. I, Grp. B C D, Cl II, Grp. E F G, Cl III
IECEx (Expl. Proof): Ex d IIC T4
Atex (Expl. Proof): EEx d IIC T4		Ex II 2 G

Ambient Temp. Range	-20°C ... +40°C (-4°F ... 104°F)
Humidity Limits:	SAMA PMC 31.1-5.2
Vibration Limits:	SAMA PMC 31.1-5.3
RFI Limits:	SAMA PMC 31.1-20 to 1000
	MHz up to 30V/m
4.1 Transmitter Sensor Tube
Material:	316ss standard, optional
	Hastalloy, Monel, Kynar coated
Operating Temperature:	-50 to 302°F (-50 to 150°C)
Maximum Pressure:	2000 psig @ 300°F
Range:	12” to 30 ft.

SECTION 5.0 Calibration

5.0 LTM-300 Output Configurations

The LTM-300 transmitter is available in three different configurations. A single output version with only one variable that will output a 4-20 mA signal for level. The second configuration is a transmitter fitted with a second float to provide a digital output for interface level in addition to the primary level output. The third configuration is one 4-20 mA signal for Primary level and two additional digital signals with one for interface level and one for temperature output.

Configurations two and three have independent calibration as well as independent outputs. These configurations have the capability for calibration and measurement using a HART protocol communications system. The HART specifications and conditions will be discussed in detail under the HART COMMUNICATION section of the manual. The temperature range is factory set from –50°F to 300°F.

Pushbutton Calibration

Step 1 - Move jumper to the write enable position (see below)

Step 2 - Move your float or magnet to the 4mA (0%) point on the probe Step 3 - Press the ENTER button on the display until “Trm Snsr” is displayed. Press the UP arrow to display “Yes” and press ENTER.

Step 4 - The display will read “Trim Zero”. Press ENTER.

Step 5 - Move the float or magnet to the 20mA (100%) point on the probe.

Step 6 - The display will read “Trim Span” with a value above. Using the arrow buttons, input the correct distance from the zero point and press Enter. Calibration is now completed.

Note: “Sel Lngth” value is factory set and should not be changed. Doing so will cause a level error indication.

FRONT PANEL

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